<?php

if( !class_exists( 'Post_SMTP_New_Wizard' ) ):

class Post_SMTP_New_Wizard {

    private $sockets = array();
    private $options;
    private $options_array;
    private $allowed_tags = array(
        'input'			=>	array(
            'type'			=>	array(),
            'id'			=>	array(),
            'name'			=>	array(),
            'value'			=>	array(),
            'class'			=>	array(),
            'placeholder'	=>	array(),
            'size'			=>	array(),
            'checked'		=>	array(),
            'required'		=>	array(),
            'data-error'    =>  array(),
            'readonly'      =>  array(),
            'disabled'      =>  array()
        ),
        'div'           =>  array(
            'class'         =>  array()
        ),
        'label'         =>  array(
            'class'         =>  array()
        ),
        'span'          => array(
            'class'         =>  array()
        ),
        'b'             =>  array(),
        'a'            =>  array(
            'href'          =>  array(),
            'target'        =>  array(),
            'class'         =>  array(),
            'id'            =>  array()
        ),
        'p'             =>  array(),
        'h3'            =>  array(),
        'select'        =>  array(
            'name'          =>  array()
        ),
        'option'        =>  array(
            'value'         =>  array(),
            'selected'      => array()
        ),
        'hr'            =>  array()
    );

    private $socket_sequence = array();

    /**
     * Constructor for the class
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function __construct() {

        $this->socket_sequence = array(
            'gmail_api',
            'resend_api',
            'sendinblue_api',
            'sendgrid_api',
            'mailgun_api',
            'elasticemail_api',
            'mandrill_api',
            'postmark_api',
            'sparkpost_api',
            'mailjet_api',
            'smtp2go_api',
            'sendpulse_api',
            'mailersend_api',
            'emailit_api',
            'maileroo_api',
        );
        
        if( !is_plugin_active( 'post-smtp-pro/post-smtp-pro.php' ) ) {

            $this->socket_sequence[] = 'office365_api';
            $this->socket_sequence[] = 'aws_ses_api';
            $this->socket_sequence[] = 'zohomail_api';

        }

        $this->socket_sequence[] = 'smtp';
        $this->socket_sequence[] = 'default';
        
        add_filter( 'post_smtp_legacy_wizard', '__return_false' );
        add_action( 'post_smtp_new_wizard', array( $this, 'load_wizard' ) );
        add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
        add_action( 'wp_ajax_ps-save-wizard', array( $this, 'save_wizard' ) );
        add_action( 'wp_ajax_update_post_smtp_pro_option', array( $this, 'update_post_smtp_pro_option_callback' ) );
        add_action( 'admin_action_zoho_auth_request', array( $this, 'auth_zoho' ) );
        add_action( 'admin_post_remove_oauth_action', array( $this, 'post_smtp_remove_oauth_action' ) );
        add_action( 'admin_init', array( $this, 'handle_gmail_oauth_redirect' ) );

        if( isset( $_GET['wizard'] ) && $_GET['wizard'] == 'legacy' ) {

            add_filter( 'post_smtp_legacy_wizard', '__return_true' );

        }

        $this->options_array = get_option( PostmanOptions::POSTMAN_OPTIONS );
        
    }

    /**
     * Load the wizard | Action Callback
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function load_wizard() {

        $transports = PostmanTransportRegistry::getInstance()->getTransports();
        
        //Not for wizard
        $settings_registry = new PostmanSettingsRegistry();
        $this->options = PostmanOptions::getInstance();
        $is_active = ( isset( $_GET['step'] ) && $_GET['step'] == 2 ) ? 'ps-active-nav' : 'ps-in-active-nav';
        $in_active = ( isset( $_GET['step'] ) && $_GET['step'] != 1 ) ? '' : 'ps-active-nav';
        $selected_tansport = $this->options->getTransportType();
        $socket = isset( $_GET['socket'] ) ? "{$_GET['socket']}-outer" : '';
        // Add popup trigger file
        require_once POST_SMTP_PATH. '/Postman/Popup/popup.php';
        ?>
 
        
        <div class="wrap">
            <div class="ps-wizard">
                <div class="ps-logo">
                    <img src="<?php echo esc_attr( POST_SMTP_ASSETS ) . '/images/logos/post-smtp-logo-large.svg'; ?>" width="250px" />
                </div>
                <div class="ps-wizard-outer <?php echo esc_attr( $socket ); ?>">
                    <div class="ps-wizard-section">
                        <div class="ps-wizard-nav">
                            <table>
                                <tr class="<?php echo esc_attr( $in_active ) ?>">
                                    <td class="ps-wizard-circle"><span class="ps-tick dashicons dashicons-yes-alt"></span></td>
                                    <td class="ps-wizard-text"><?php _e( 'Choose your SMTP Mailer', 'post-smtp' ) ?></td>
                                    <td class="ps-wizard-edit"><span class="dashicons dashicons-edit" data-step="1"></span></td>
                                </tr>
                                <tr class="<?php echo esc_attr( $is_active ) ?>">
                                    <td class="ps-wizard-circle"><span class="ps-tick dashicons dashicons-yes-alt"><span class="ps-wizard-line"></span></span></td>
                                    <td class="ps-wizard-text"><?php _e( 'Configure Mailer Settings', 'post-smtp' ) ?></td>
                                    <td class="ps-wizard-edit"><span class="dashicons dashicons-edit" data-step="2"></span></td>
                                </tr>
                                <tr class="ps-in-active-nav">
                                    <td class="ps-wizard-circle"><span class="ps-tick dashicons dashicons-yes-alt"><span class="ps-wizard-line"></span></span></td>
                                    <td class="ps-wizard-text"><?php _e( 'Send Test Email', 'post-smtp' ) ?></td>
                                    <td class="ps-wizard-edit"><span class="dashicons dashicons-edit" data-step="3"></span></td>
                                </tr>
                            </table>
                        </div>
                        <div class="ps-wizard-pages">
                            <form id="ps-wizard-form">
                                <?php wp_nonce_field( 'post-smtp', 'security' );  ?>
                                <div class="ps-wizard-screens-container">
                                    <div class="ps-wizard-step ps-wizard-step-1">
                                        <p style="width: 70%; margin-bottom: 30px;"><?php echo esc_html__( 'Choose a mailer from the following options.', 'post-smtp' ); ?></p>
                                        <div class="ps-wizard-sockets">      
                                        <?php

                                        $row  = 0;

                                        $transports = array_merge( array_flip( $this->socket_sequence ), $transports );
                                        
                                        foreach( $transports as $key => $transport ) {

                                            $urls = array(
                                                'default'           =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/smtp.png',
                                                'smtp'              =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/smtp.png',
                                                'gmail_api'         =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/gmail.png',
                                                'mandrill_api'      =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/mandrill.png',
                                                'sendgrid_api'      =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/sendgrid.png',
                                                'mailersend_api'    =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/mailersend.png',
                                                'mailgun_api'       =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/mailgun.png',
                                                'sendinblue_api'    =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/brevo.png',
                                                'postmark_api'      =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/postmark.png',
                                                'sparkpost_api'     =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/sparkpost.png',
                                                'mailjet_api'       =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/mailjet.png',
                                                'sendpulse_api'     =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/sendpulse.png',
                                                'smtp2go_api'       =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/smtp2go.png',
                                                'office365_api'     =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/ms365.png',
                                                'elasticemail_api'  =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/elasticemail.png',
                                                'aws_ses_api'       =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/amazon.png',
                                                'zohomail_api'      =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/zoho.png',
                                                'resend_api'        =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/resend.png',
                                                'emailit_api'       =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/emailit.png',
                                                'maileroo_api'      =>  POST_SMTP_URL . '/Postman/Wizard/assets/images/maileroo.png'

                                            );

                                            $url = '';
                                            $checked = '';
                                            $slug = '';
                                            $transport_name = '';
                                            $is_pro = '';
                                            $product_url = '';

                                            if( is_object( $transport ) ) {
                                                
                                                $url = isset( $urls[$transport->getSlug()] ) ? $urls[$transport->getSlug()] : $transport->getLogoURL();
                                                $this->sockets[$transport->getSlug()] = $transport->getName();

                                                if( isset( $_GET['socket'] ) && !empty( sanitize_text_field( $_GET['socket'] ) ) && $transport->getSlug() == sanitize_text_field( $_GET['socket'] ) ) {

                                                    $checked = 'checked';

                                                }
                                                elseif( $transport->getSlug() == $this->options->getTransportType() && !is_plugin_active( 'post-smtp-pro/post-smtp-pro.php' ) ) {

                                                    $checked = 'checked';

                                                }
                                                
                                                $slug = $transport->getSlug();
                                                $transport_name = $transport->getName();

                                            }
                                            else {
                                                
                                                $transport_slug = $key;

                                                if( $transport_slug == 'office365_api' ) {
                                                    
                                                    $url = POST_SMTP_URL . '/Postman/Wizard/assets/images/ms365.png';
                                                    $slug = $transport_slug;
                                                    $transport_name = 'Microsoft 365';
                                                    $is_pro = 'ps-pro-extension';
                                                    $product_url = postman_is_bfcm() ? 'https://postmansmtp.com/cyber-monday-sale?utm_source=plugin&utm_medium=section_name&utm_campaign=BFCM&utm_id=BFCM_2024' : 'https://postmansmtp.com/pricing/?utm_source=plugin&utm_medium=wizard_microsoft&utm_campaign=plugin';

                                                }
                                              if( $transport_slug == 'zohomail_api' ) {
                                                    
                                                    $url = POST_SMTP_URL . '/Postman/Wizard/assets/images/zoho.png';
                                                    $slug = $transport_slug;
                                                    $transport_name = 'Zoho';
                                                    $is_pro = 'ps-pro-extension';
                                                    $product_url = postman_is_bfcm() ? 'https://postmansmtp.com/cyber-monday-sale?utm_source=plugin&utm_medium=section_name&utm_campaign=BFCM&utm_id=BFCM_2024' : 'https://postmansmtp.com/pricing/?utm_source=plugin&utm_medium=wizard_zoho&utm_campaign=plugin';

                                                }
                                                if( !class_exists( 'Post_Smtp_Amazon_Ses' ) && $transport_slug == 'aws_ses_api' ) {
                                                    
                                                    $url = POST_SMTP_URL . '/Postman/Wizard/assets/images/amazon.png';
                                                    $slug = $transport_slug;
                                                    $transport_name = 'Amazon SES';
                                                    $is_pro = 'ps-pro-extension';
                                                    $product_url = postman_is_bfcm() ? 'https://postmansmtp.com/cyber-monday-sale?utm_source=plugin&utm_medium=section_name&utm_campaign=BFCM&utm_id=BFCM_2024' : 'https://postmansmtp.com/pricing/?utm_source=plugin&utm_medium=wizard_amazonses&utm_campaign=plugin';

                                                }

                                            }

                                            if( $row >= 4 ) {

                                                $row = 0;

                                                ?>
                                                </div>
                                                <div class="ps-wizard-sockets">
                                                <?php


                                            }

                                            ?>
                                            <div class="ps-wizard-socket-radio-outer">
                                                <div class="ps-wizard-socket-radio <?php echo !empty( $is_pro ) ? esc_attr( $is_pro ) . '-outer' : ''; ?>" <?php echo !empty( $is_pro ) ? 'data-url="' . esc_url( $product_url ) . '"' : ''; ?>>
                                                    <?php if( !empty( $is_pro ) ): ?>
                                                        <span class="<?php echo $is_pro . '-tag' ?>">PRO</span>
                                                    <?php endif; ?>
                                                    <?php if( empty( $is_pro ) ) : ?> <label for="ps-wizard-socket-<?php echo esc_attr( $slug ); ?>"><?php endif; ?>                                                    
                                                        <?php if( empty( $is_pro ) ) : ?> 
                                                            <input type="radio" <?php echo esc_attr( $checked ) ;?> class="ps-wizard-socket-check <?php echo esc_attr( $is_pro ); ?>" id="ps-wizard-socket-<?php echo esc_attr( $slug ); ?>" value="<?php echo esc_attr( $slug ); ?>" name="<?php echo 'postman_options[' . esc_attr( PostmanOptions::TRANSPORT_TYPE ) . ']'; ?>">
                                                        <?php endif; ?>
                                                        <img src="<?php echo esc_url( $url ); ?>">
                                                        <?php if( empty( $is_pro ) ) : ?>
                                                            <div class="ps-wizard-socket-tick-container">
                                                                <div class="ps-wizard-socket-tick"><span class="dashicons dashicons-yes"></span></div>
                                                            </div> 
                                                        <?php endif; ?>
                                                        <h4><?php echo esc_attr( $transport_name ); ?></h4>
                                                    <?php if( empty( $is_pro ) ) : ?> </label><?php endif; ?>
                                                </div>
                                            </div>
                                            <?php

                                            $row++;

                                        }
                                        ?>
                                        </div>
                                        <p style="width: 70%; margin-bottom: 30px;">
                                        <?php echo sprintf(
                                            '%1$s <i><a href="%2$s">%3$s</a></i>',
                                            __( 'Need help in choosing one?', 'post-smtp' ),
                                            esc_url( admin_url( 'admin.php?page=postman-contact' ) ),
                                            __( 'Check out our Mailer Guide.', 'post-smtp' )
                                        ); ?>
                                        </p>

                                        <p style="width: 70%; margin-bottom: 30px;">
                                            <?php echo esc_html__( 'Did we miss out on what you are looking for? Feel free to suggest your Mailer.', 'post-smtp' ); ?>
                                        </p>
                                    </div>
                                    <div class="ps-wizard-step ps-wizard-step-2">
                                        <a href="" data-step="1" class="ps-wizard-back"><span class="dashicons dashicons-arrow-left-alt"></span>Back</a>
                                        <?php
                                        if( !empty( $this->sockets ) ) {

                                            $this->render_name_email_settings();

                                            foreach( $this->sockets as $key => $title ) {

                                                $active_socket = ( isset( $_GET['socket'] ) && $_GET['socket'] == $key ) ? 'style="display: block;"' : '';

                                                ?>
                                                <div class="ps-form-ui ps-wizard-socket <?php echo esc_attr( $key ); ?>" <?php echo $active_socket; ?>>
                                                    <h3><?php echo $title == 'Default' ? '' : esc_attr( $title ); ?></h3>
                                                    <?php $this->render_socket_settings( $key ); ?>
                                                </div>
                                                <?php

                                            }

                                        }
                                        ?>
                                    </div>
                                    <div class="ps-wizard-step ps-wizard-step-3">
                                        <a href="" data-step="2" class="ps-wizard-back"><span class="dashicons dashicons-arrow-left-alt"></span><?php _e( 'Back', 'post-smtp' ) ?></a>
                                        <p><?php _e( 'Send a test email message to check your SMTP mailer’s connection. If there is a problem, Post SMTP will give up after 60 seconds.', 'post-smtp' ); ?></p>
                                        <div class="ps-form-ui">
                                            <div class="ps-form-control">
                                                <div><label><?php _e( 'Recipient Email Address', 'post-smtp' ) ?></label></div>
                                                <input type="text" class="ps-test-to" required data-error="Enter Recipient Email Address" name="postman_test_options[test_email]" value="<?php echo esc_attr( wp_get_current_user()->user_email ); ?>" placeholder="Recipient Email Address">
                                                <span class="ps-form-control-info"><?php _e( 'Enter the email address where you want to send a test email message.', 'post-smtp' ) ?></span>
                                                <p class="ps-form-control-info"><?php _e( 'Are your WordPress emails getting broken? Here how you can ', 'post-smtp' ) ?> <a href="https://postmansmtp.com/fix-for-broken-emails/?utm_source=plugin&utm_medium=wizard&utm_campaign=plugin" target="_blank"><?php _e( 'fix Broken Emails', 'post-smtp' ) ?></a>.</p>
                                            </div>
                                            <button class="button button-primary ps-blue-btn ps-wizard-send-test-email" data-step="3"><?php _e( 'Send Test Email', 'post-smtp' ) ?> <span class="dashicons dashicons-email"></span></button>
                                            <div>
                                                <p class="ps-wizard-error"></p>
                                                <p class="ps-wizard-success"></p>
                                                <p class="ps-wizard-health-report"></p>
                                            </div>
                                        </div>
                                    </div>
                                    <div class="ps-wizard-step ps-wizard-step-4">
                                        <h4>❤ <?php _e( 'Share Your Feedback', 'post-smtp' ) ?></h4>
                                        <p><?php 
                                        /**
                                         * Translators: %1$s Text, %2$s URL, %3$s URL Text
                                         */
                                        printf(
                                            '%1$s <a href="%2$s" target="_blank">%3$s</a>',
                                            __( 'We value your opinion on your experience with Post SMTP and would appreciate your feedback. ', 'post-smtp' ),
                                            esc_url( 'https://wordpress.org/support/plugin/post-smtp/reviews/#new-post' ),
                                            __( 'Leave a review here.', 'post-smtp' )
                                        ) ?></p>
                                        <div class="ps-home-middle-right" style="background-image: url(<?php echo esc_url( POST_SMTP_ASSETS . 'images/icons/mobile-banner.png' ) ?>); float: unset; width: 100%; height: 230px;">
                                            <div class="ps-mobile-notice-content">
                                                <p><?php _e( 'Introducing NEW Post SMTP Mobile App' ); ?></p>
                                                <div class="ps-mobile-notice-features">
                                                    <div class="ps-mobile-feature-left">
                                                        <span class="dashicons dashicons-yes-alt"></span>
                                                        <?php _e( 'Easy Email Tracking', 'post-smtp' ) ?>
                                                        <br>
                                                        <span class="dashicons dashicons-yes-alt"></span>
                                                        <?php _e( 'Quickly View Error Details', 'post-smtp' ) ?>
                                                        <br>
                                                        <span class="dashicons dashicons-yes-alt"></span>
                                                        <?php _e( 'Easy Email Tracking', 'post-smtp' ) ?>                                                   			
                                                    </div>
                                                    <div class="ps-mobile-feature-right">
                                                        <span class="dashicons dashicons-yes-alt"></span>
                                                        <?php _e( 'Get Email Preview', 'post-smtp' ) ?>                                               
                                                        <br>
                                                        <span class="dashicons dashicons-yes-alt"></span>
                                                        <?php _e( 'Resend Failed Emails', 'post-smtp' ) ?>                                                    
                                                        <br>
                                                        <span class="dashicons dashicons-yes-alt"></span>
                                                        <?php _e( 'Support multiple sites', 'post-smtp' ) ?>                                                      
                                                    </div>
                                                </div>
                                                <div style="display: flex; margin-top: 15px;">
                                                    <div class="ps-app-download-button">
                                                        <a href="https://play.google.com/store/apps/details?id=com.postsmtp&referrer=utm_source%3Dplugin%26utm_medium%3Ddashboard%26utm_campaign%3Dplugin%26anid%3Dadmob" target="_blank"><img src=<?php echo esc_url( POST_SMTP_URL . '/Postman/Wizard/assets/images/android-icon.png' ) ?>><div><p style="font-size: 12px;">Get it On</p><p style="font-size: 14px; font-weight: 750">Google Play</p></div></a>
                                                    </div>
                                                    <div class="ps-app-download-button">
                                                        <a href="https://apps.apple.com/us/app/post-smtp/id6473368559?utm_source=plugin&utm_medium=dashboard&utm_campaign=plugin" target="_blank"><img src=<?php echo esc_url( POST_SMTP_URL . '/Postman/Wizard/assets/images/apple-icon.png' ) ?>><div><p style="font-size: 12px;">Download on the</p><p style="font-size: 14px; font-weight: 750;">App Store</p></div></a>
                                                    </div>
                                                </div>
                                            </div>
                                        </div>
                                        <div style="clear: both"></div>
                                    </div>
                                </div>
                            </form>
                        </div>
                        <div style="clear: both"></div>
                    </div>
                    <div class="ps-wizard-footer">
                        <div class="ps-wizard-footer-left">
                            <div class="ps-wizard-nav">
                                <table>
                                    <tr class="ps-in-active-nav">
                                        <td class="ps-wizard-circle"><span class="ps-tick dashicons dashicons-yes-alt"><span class="ps-wizard-line"></span></span></td>
                                        <td class="ps-wizard-text"></td>
                                        <td class="ps-wizard-edit"><span class="dashicons dashicons-edit" data-step="4"></span></td>
                                    </tr>
                                </table>
                            </div>
                        </div>
                        <div class="ps-wizard-footer-right">
                            <div class="ps-wizard-step ps-wizard-step-1">
                                <p class="ps-wizard-error"></p>
                                <button class="button button-primary ps-blue-btn ps-wizard-next-btn" data-step="1"><?php _e( 'Continue', 'post-smtp' ) ?> <span class="dashicons dashicons-arrow-right-alt"></span></button>
                                <div style="clear: both"></div>
                            </div>
                            <div class="ps-wizard-step ps-wizard-step-2">
                                <p class="ps-wizard-success"><?php echo ( isset( $_GET['success'] ) && isset( $_GET['msg'] ) ) ? sanitize_text_field( $_GET['msg'] ) : ''; ?></p>
                                <p class="ps-wizard-error"><?php echo ( !isset( $_GET['success'] ) && isset( $_GET['msg'] ) ) ? sanitize_text_field( $_GET['msg'] ) : ''; ?></p>
                                <button class="button button-primary ps-blue-btn ps-wizard-next-btn" data-step="2"></span><?php _e( 'Save and Continue', 'post-smtp' ) ?> <span class="dashicons dashicons-arrow-right-alt"></span></button>
                                <div style="clear: both"></div>
                            </div>
                            <div class="ps-wizard-step ps-wizard-step-3">
                                <button class="button button-primary ps-blue-btn ps-wizard-next-btn ps-finish-wizard" data-step="3"><?php _e( 'I\'ll send a test email later.', 'post-smtp' ) ?> <span class="dashicons dashicons-arrow-right-alt"></span></button>
                            </div>
                            <div class="ps-wizard-step ps-wizard-step-4">
                                <div class="ps-wizard-congrates">
                                    <h2>👏 <?php _e( 'Great you are all done!', 'post-smtp' ); ?></h2>
                                    <?php 
                                    printf( 
                                        '<a href="%1$s" style="font-size: 12px;">%2$s <b>%3$s</b> %4$s <b>%5$s</b> %6$s</a>', 
                                        esc_url( admin_url( 'admin.php?page=postman/configuration' ) ),
                                        __( 'Visit settings to setup', 'post-smtp' ),
                                        __( 'Notifications', 'post-smtp' ),
                                        __( 'and', 'post-smtp' ),
                                        __( 'Fallback SMTP'),
                                        __( 'options.', 'post-smtp' )
                                    );
                                    ?>
                                </div>
                                <div class="ps-wizard-view-logs">
                                    <div><a href="<?php echo esc_url( admin_url( 'admin.php?page=postman_email_log' ) ); ?>" class="button button-primary ps-blue-btn"><?php esc_html_e( 'View logs', 'post-smtp' ); ?> <span class="dashicons dashicons-arrow-right-alt"></span></a></div>
                                    <div><a href="<?php echo esc_url( admin_url( 'admin.php?page=postman' ) ); ?>" style="font-size: 12px; color: #999999;"><?php esc_html_e( 'Skip to dashboard', 'post-smtp' ); ?></a></div>
                                </div>
                                <div style="clear: both"></div>
                            </div>
                        </div>
                        <div style="clear: both"></div>
                    </div>
                </div>
                <div class="ps-wizard-page-footer">
                    <a href="<?php echo esc_url( admin_url( 'admin.php?page=postman/configuration_wizard&wizard=legacy' ) ); ?>"><?php _e( 'Continue with legacy wizard', 'post-smtp' ); ?></a>
                    <a href="<?php echo esc_url( admin_url( 'admin.php?page=postman' ) );?>"><?php _e( 'Go back to dashboard', 'post-smtp' ); ?></a>
                    <a href="<?php echo esc_url( admin_url( 'admin.php?page=postman/configuration' ) );?>"><?php _e( 'Switch to settings section', 'post-smtp' ); ?></a>
                </div>
            </div>
        </div>

        <?php

    }


    /**
     * Enqueue Scripts | Action Callback
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function enqueue_scripts() {

        $localized = array(
            'Step1E1'           => __( 'Select a socket type to continue.', 'post-smtp' ),
            'Step2E2'           => __( 'Please enter From Email.', 'post-smtp' ),
            'Step2E3'           => __( 'Please try again, something went wrong.', 'post-smtp' ),
            'Step3E4'           => __( 'Please enter recipient email address.', 'post-smtp' ),
            'finish'            => __( 'Finish', 'post-smtp' ),
            'adminURL'          => admin_url(),
            'connectivityTestMsg'  => sprintf( 
                '%1$s %2$s <a href="%3$s" target="_blank">%4$s</a> %5$s',
                '<span class="dashicons dashicons-warning"></span>',
                __( 'Take the', 'post-smtp' ),
                esc_url( admin_url( 'admin.php?page=postman/port_test' ) ),
                __( 'connectivity test', 'post-smtp' ),
                __( 'of your site to get more information about this failure.', 'post-smtp' )
            ),
            // Add the nonce for pro option AJAX
            'pro_option_nonce' => wp_create_nonce('update_post_smtp_pro_option'),
        );

        if( class_exists( 'Post_Smtp_Office365' ) ) {

            //Office 365 URL Params | State
            $state = get_transient( Post_Smtp_Office365::STATE );

            if ( $state === false ) {

                $state = bin2hex( random_bytes( 32 / 2 ) );
                set_transient( Post_Smtp_Office365::STATE, $state, 5 * MINUTE_IN_SECONDS );

            }

            $localized['office365State'] = $state;

        }
        $gmail_icon_url = POST_SMTP_URL . '/Postman/Wizard/assets/images/gmail.png';
		$localized['gmail_icon'] = $gmail_icon_url; 
        $localized['tenantId'] = apply_filters( 'post_smtp_office365_tenant_id', 'common' ); 

        wp_enqueue_style( 'post-smtp-wizard', POST_SMTP_URL . '/Postman/Wizard/assets/css/wizard.css', array(), POST_SMTP_VER );
        wp_enqueue_script( 'post-smtp-wizard', POST_SMTP_URL . '/Postman/Wizard/assets/js/wizard.js', array( 'jquery' ), POST_SMTP_VER );
        wp_localize_script( 'post-smtp-wizard', 'PostSMTPWizard', $localized );

    }


    /**
     * Render Name and Email Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_name_email_settings() {

        $from_name = null !== $this->options->getMessageSenderName() ? esc_attr( $this->options->getMessageSenderName() ) : '';
        $from_email = null !== $this->options->getMessageSenderEmail() ? esc_attr( $this->options->getMessageSenderEmail() ) : '';
        $from_name_enforced = $this->options->isPluginSenderNameEnforced() ? 'checked' : '';
        $from_email_enforced = $this->options->isPluginSenderEmailEnforced() ? 'checked' : '';

        $html = '
        <div class="ps-form-ui ps-name-email-settings">
            <div class="ps-form-control">
                <h3>From Address</h3>
                <p>'. sprintf(
                    '%1$s',
                    esc_html__( 'It is important to indicate the origin (email and name) of a message for the receiver. The From Address provides these details.', 'post-smtp' )
                ) .'</p>
                     <p>'. sprintf(
                    '%1$s',
                    esc_html__( 'You may edit the following field if you do not wish to use default settings.', 'post-smtp' )
                ) .'</p>
                <div><label>From Email</label></div>
                <input type="text" class="ps-from-email" required data-error="'.__( 'Please enter From Email.', 'post-smtp' ).'" name="postman_options['.esc_attr( PostmanOptions::MESSAGE_SENDER_EMAIL ).']" value="'.$from_email.'" placeholder="From Email">
                <span class="ps-form-control-info">'.__( 'The email address that emails are sent from.', 'post-smtp' ).'</span>
                <div class="ps-form-control-info">'.__( 'Please note that other plugins may override this field, to prevent this use the setting below.', 'post-smtp' ).'</div>
                <div>
                    <div class="ps-form-switch-control">
                        <label class="ps-switch-1">
                            <input type="checkbox" '.$from_email_enforced.' name="postman_options['.esc_attr( PostmanOptions::PREVENT_MESSAGE_SENDER_EMAIL_OVERRIDE ).']">
                            <span class="slider round"></span>
                        </label> 
                    </div>
                    <span>'.
                    sprintf( 
                        '%1$s <b>%2$s</b> %3$s <b>%4$s</b> %5$s <b>%6$s</b>',
                        __( 'Check this to prevent changes on the', 'post-smtp' ),
                        __( 'From Email', 'post-smtp' ),
                        __( 'field by other', 'post-smtp' ),
                        __( 'Plugins', 'post-smtp' ),
                        __( 'and', 'post-smtp' ),
                        __( 'Themes', 'post-smtp' )
                    ).
                    '</span>
                </div> 
            </div>
            <div class="ps-form-control">
                <div><label>From Name</label></div>
                <input type="text" class="ps-from-name" required data-error="'.__( 'Please enter From Name.', 'post-smtp' ).'" name="postman_options['.esc_attr( PostmanOptions::MESSAGE_SENDER_NAME ).']" value="'.$from_name.'" placeholder="From Name">
                <span class="ps-form-control-info">'.__( 'The name that emails are sent from.', 'post-smtp' ).'</span>
                <div>
                    <div class="ps-form-switch-control">
                        <label class="ps-switch-1">
                            <input type="checkbox" '.$from_name_enforced.' name="postman_options['.esc_attr( PostmanOptions::PREVENT_MESSAGE_SENDER_NAME_OVERRIDE ).']">
                            <span class="slider round"></span>
                        </label> 
                    </div>
                    <span>'.
                    sprintf( 
                        '%1$s <b>%2$s</b> %3$s <b>%4$s</b> %5$s <b>%6$s</b>',
                        __( 'Check this to prevent changes on the', 'post-smtp' ),
                        __( 'From Name', 'post-smtp' ),
                        __( 'field by other', 'post-smtp' ),
                        __( 'Plugins', 'post-smtp' ),
                        __( 'and', 'post-smtp' ),
                        __( 'Themes', 'post-smtp' )
                    ).
                    '</span>
                </div>
            </div>
        </div>
        ';

        echo wp_kses( $html, $this->allowed_tags );

    }


    /**
     * Render Socket Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_socket_settings( $socket ) {

        switch ( $socket ) {
            
            case 'default':
                echo wp_kses( $this->render_default_settings(), $this->allowed_tags );
            break;
            case 'smtp':
                echo wp_kses( $this->render_smtp_settings(), $this->allowed_tags );
            break;
            case 'gmail_api':
                echo wp_kses( $this->render_gmail_settings(), $this->allowed_tags );
            break;
            case 'mandrill_api':
                echo wp_kses( $this->render_mandrill_settings(), $this->allowed_tags );
            break;
            case 'emailit_api':
                echo wp_kses( $this->render_emailit_settings(), $this->allowed_tags );
            break;
            case 'maileroo_api':
                echo wp_kses( $this->render_maileroo_settings(), $this->allowed_tags );
            break;
            case 'sendgrid_api':
                echo wp_kses( $this->render_sendgrid_settings(), $this->allowed_tags );
            break;
            case 'mailersend_api':  
                echo wp_kses( $this->render_mailersend_settings(), $this->allowed_tags );
            break;
            case 'mailgun_api':
                echo wp_kses( $this->render_mailgun_settings(), $this->allowed_tags );
            break;
            case 'sendinblue_api':
                echo wp_kses( $this->render_brevo_settings(), $this->allowed_tags );
            break;
            case 'resend_api':
                echo wp_kses( $this->render_resend_settings(), $this->allowed_tags );
            break;
            case 'postmark_api':
                echo wp_kses( $this->render_postmark_settings(), $this->allowed_tags );
            break;
            case 'sparkpost_api':
                echo wp_kses( $this->render_sparkpost_settings(), $this->allowed_tags );
            break;
            case 'mailjet_api':
                echo wp_kses( $this->render_mailjet_settings(), $this->allowed_tags );
            break;
            case 'sendpulse_api':
                echo wp_kses( $this->render_sendpulse_settings(), $this->allowed_tags );
            break;
            case 'elasticemail_api':
                echo wp_kses( $this->render_elasticemail_settings(), $this->allowed_tags );
            break;
            case 'aws_ses_api';
                echo wp_kses( $this->render_amazonses_settings(), $this->allowed_tags );
            break;
            case 'office365_api';
                echo wp_kses( $this->render_office365_settings(), $this->allowed_tags );
            break;
            case 'zohomail_api';
                echo wp_kses( $this->render_zoho_settings(), $this->allowed_tags );
            break;
            case 'smtp2go_api':
                echo wp_kses( $this->render_smtp2go_settings(), $this->allowed_tags );
                break;
        }

    }

    /**
     * Render default Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_default_settings() {

        $html = '<input type="hidden" name="postman_options=[transport_type]" value="dafault" />';

        return $html;

    }


    /**
     * Render SMTP Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_smtp_settings() {

        $hostname = null !== $this->options->getHostname() ? esc_attr ( $this->options->getHostname() ) : '';
        $port = null !== $this->options->getPort() ? esc_attr ( $this->options->getPort() ) : '';
        $username = null !== $this->options->getUsername() ? esc_attr ( $this->options->getUsername() ) : '';
        $password = null !== $this->options->getPassword() ? esc_attr ( $this->options->getPassword() ) : '';


        $html = '<p>' . esc_html__( 'You can set up any SMTP of your choice, but it is important to remember that custom SMTP may not have adequate security.', 'post-smtp' ) . '</p>';
        $html .= '<p>' . esc_html__( 'Kindly check our ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/configure-post-smtp-with-other-smtp" target="_blank">' . esc_html__( 'SMTP documentation', 'post-smtp' ) . '</a>' . esc_html__( ' before implementation.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>Host Name</label></div>
            <input type="text" class="ps-smtp-host-name" required data-error="'.__( 'Please enter Host Name.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::HOSTNAME ) .']" value="'.$hostname.'" placeholder="Host Name">
            <span class="ps-form-control-info">
            '.__( 'Outgoing Mail Server Hostname', 'post-smtp' ).'
            </span>
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Port</label></div>
            <input type="text" class="ps-smtp-port" required data-error="'.__( 'Please enter Port.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::PORT ) .']" value="'.$port.'" placeholder="Port">
            <span class="ps-form-control-info">
            '.__( 'Outgoing Mail Server Port', 'post-smtp' ).'
            </span>
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Username</label></div>
            <input type="text" class="ps-smtp-username" required data-error="'.__( 'Please enter Username.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::BASIC_AUTH_USERNAME ) .']" value="'.$username.'" placeholder="Username">
            <span class="ps-form-control-info">
            '.__( 'The Username is usually the same as the Envelope-From Email Address.', 'post-smtp' ).'
            </span>
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Password</label></div>
            <input type="text" class="ps-smtp-password" required data-error="'.__( 'Please enter Password.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::BASIC_AUTH_PASSWORD ) .']" value="'.$password.'" placeholder="Password">
            <span class="ps-form-control-info">
            '.__( 'Password or App Password.', 'post-smtp' ).'
            </span>
        </div>
        ';

        return $html;

    }


    /**
     * Render Gmail API Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
public function render_gmail_settings() {
    // Get the Client ID and Client Secret from options
    $client_id = ! is_null( $this->options->getClientId() ) ? esc_attr( $this->options->getClientId() ) : '';
    $client_secret = ! is_null( $this->options->getClientSecret() ) ? esc_attr( $this->options->getClientSecret() ) : '';
    // Check if the 'success' parameter exists in URL
    $required = isset( $_GET['success'] ) && $_GET['success'] == 1 ? '' : 'required';

    // Retrieve options for premium features and extensions
    $post_smtp_pro_options = get_option( 'post_smtp_pro', [] );
    $postman_auth_token = get_option( 'postman_auth_token' );
    $bonus_extensions = isset( $post_smtp_pro_options['extensions'] ) ? $post_smtp_pro_options['extensions'] : [];
    $gmail_oneclick_enabled = in_array( 'gmail-oneclick', $bonus_extensions );
    $auth_url = get_option( 'post_smtp_gmail_auth_url' );

    // Setup classes and attributes for form visibility
    $hidden_class = $gmail_oneclick_enabled ? 'ps-hidden' : '';
    $client_id_required = $gmail_oneclick_enabled ? '' : 'required';
    $client_secret_required = $gmail_oneclick_enabled ? '' : 'required';
    $one_click_class = 'ps-enable-gmail-one-click';
    $url = POST_SMTP_URL . '/Postman/Wizard/assets/images/wizard-google.png';
    $transport_name = __( '<strong>1-Click</strong> Google Mailer Setup?', 'post-smtp' );
    $product_url = postman_is_bfcm() ? 
        'https://postmansmtp.com/cyber-monday-sale?utm_source=plugin&utm_medium=section_name&utm_campaign=BFCM&utm_id=BFCM_2024' : 
        'https://postmansmtp.com/pricing/?utm_source=plugin&utm_medium=wizard_gmail_one_click&utm_campaign=plugin';


    if ( isset( $_GET['success'] ) && $_GET['success'] == 1 ) {
        $client_id_required     = '';
        $client_secret_required = '';
    }

    // Prepare data for JSON encoding
    $data = [
        'url' => $url,
        'transport_name' => $transport_name,
        'product_url' => $product_url
    ];
    $json_data = htmlspecialchars( json_encode( $data ), ENT_QUOTES, 'UTF-8' );

    // Begin HTML output
    $html = '<p>' . esc_html__( 'Post SMTP offers two ways to connect Gmail API with WordPress: One-Click Setup (fastest) and Manual (free).', 'post-smtp' ) . '</p>';
    $html .= '<hr />';
    if ( post_smtp_has_pro() ) {
        $one_click = true;
        $html .= sprintf( '<h3>%1$s</h3>', __( 'One-Click Setup', 'post-smtp' ) );
    } else {
        $html .= sprintf(
            '<h3 class="%1$s" >%1$s <span class="ps-wizard-pro-tag">%2$s</span></h3>',
            __( 'One-Click Setup', 'post-smtp' ),
            __( 'PRO', 'post-smtp' )
        );
        $one_click = 'disabled';
        $one_click_class .= ' disabled';
    }

    $html .= __( '<p>Enable the option for a quick and easy way to connect with Google without the need of manually creating an app. <p>', 'post-smtp' );

    // One-click switch control
    $html .= "<div>
        <div class='ps-form-switch-control'>
            <label class='ps-switch-1 ".(!post_smtp_has_pro() ? 'ps-gmail-one-click' : '')." '>
               
                <input type='hidden' id='ps-one-click-data' value='" . esc_attr( $json_data ) . "'>
                <input type='checkbox' class='$one_click_class' " . ( $gmail_oneclick_enabled ? 'checked' : '' ) . ">
                <span class='slider round'></span>
            </label> 
        </div>
    </div>";
    // Client ID and Secret inputs
    $html .= '<div class="ps-disable-one-click-setup ' . ( $gmail_oneclick_enabled ? 'ps-hidden' : '' ) . '">
    
    <p>' . esc_html__( 'Manual Setup (FREE)', 'post-smtp' ) . '</p><p>' . esc_html__( 'The free Gmail mailer requires you to create an app manually to generate the Client ID and Client Secret.', 'post-smtp' ) . '</p>';

    $html .= '
    <div class="ps-form-control">
        <div><label>' . __( 'Client ID', 'post-smtp' ) . '</label></div>
        <input type="text" class="ps-gmail-api-client-id" ' . esc_attr( $client_id_required ) . ' data-error="' . esc_attr( __( 'Please enter Client ID.', 'post-smtp' ) ) . '" name="postman_options[' . esc_attr( PostmanOptions::CLIENT_ID ) . ']" value="' . $client_id . '" placeholder="Client ID">
    </div>';

    $html .= '
    <div class="ps-form-control">
        <div><label>' . __( 'Client Secret', 'post-smtp' ) . '</label></div>
        <input type="text" class="ps-gmail-client-secret" ' . esc_attr( $client_secret_required ) . ' data-error="' . esc_attr( __( 'Please enter Client Secret.', 'post-smtp' ) ) . '" name="postman_options[' . esc_attr( PostmanOptions::CLIENT_SECRET ) . ']" value="' . $client_secret . '" placeholder="Client Secret">
    </div>';

    $html .= '
    <div class="ps-form-control">
        <div><label>' . __( 'Authorized JavaScript origins', 'post-smtp' ) . '</label></div>
        <input type="text" class="ps-gmail-js-origin" value="' . esc_url( site_url() ) . '" readonly>
    </div>';

    $html .= '
    <div class="ps-form-control">
        <div><label>' . __( 'Authorized redirect URI', 'post-smtp' ) . '</label></div>
        <input type="text" class="ps-gmail-redirect-uri" value="' . esc_url( admin_url( 'options-general.php?page=postman' ) ) . '" readonly>
        <span class="ps-form-control-info">
        ' . __( 'Please copy this URL into the "Authorized redirect URL" field of your Gmail account settings.', 'post-smtp' ) . '
        </span>
    </div>';

    $html .= '
    <h3>' . __( 'Authorization (Required)', 'post-smtp' ) . '</h3>
    <p>' . __( 'Before continuing, you\'ll need to allow this plugin to send emails using Gmail API.', 'post-smtp' ) . '</p>
<input type="hidden"  class="ps-gmail-warning" ' . esc_attr( $client_id_required ) . ' data-error="' . esc_attr( __( 'Please authenticate by clicking Connect to Gmail API', 'post-smtp' ) ) . '" />
    <a href="' . esc_url( admin_url( 'admin-post.php?action=postman/requestOauthGrant' ) ) . '" class="button button-primary ps-blue-btn" id="ps-wizard-connect-gmail">' . __( 'Connect to Gmail API', 'post-smtp' ) . '</a>';

    // Remove OAuth action button
    $html .= '</div>';
    $html .= '<div class="ps-disable-gmail-setup ' . ( $gmail_oneclick_enabled ? '' : 'ps-hidden' ) . '">';
    if ( post_smtp_has_pro() ) {
        if ( $postman_auth_token && isset( $postman_auth_token['user_email'] ) ) {
            $nonce = wp_create_nonce( 'remove_oauth_action' );
            $action_url = esc_url( add_query_arg(
                [
                    '_wpnonce' => $nonce,
                    'action' => 'remove_oauth_action',
                ],
                admin_url( 'admin-post.php' )
            ) );
            if ( isset( $postman_auth_token['user_email'] ) ) {
                $html .= ' <span class="icon-circle"><span class="icon-check"></span> </span> <b class= "ps-wizard-success">' . sprintf( esc_html__('Connected with: %s', 'post-smtp'), esc_html( $postman_auth_token['user_email'] ) ) . '</b>';
            }
            $html .= '<a href="' . $action_url . '" class="ps-remove-gmail-btn ps-disable-gmail-setup wizard-btn-css">';
            $html .= esc_html__( 'Remove Authorization', 'post-smtp' );
            $html .= '</a>';
        }else {
                $html .= '<h3>' . esc_html__( 'Authorization (Required)', 'post-smtp' ) . '</h3>';
                $html .= '<p>' . esc_html__( 'Before continuing, you\'ll need to allow this plugin to send emails using Gmail API.', 'post-smtp' ) . '</p>';
                $html .= '<input type="hidden" ' . esc_attr( $required ) . ' data-error="' . esc_attr__( 'Please authenticate by clicking Connect to Gmail API', 'post-smtp' ) . '" />';
                $html .= '<a href="' . esc_url( $auth_url ) . '" class="button button-primary ps-gmail-btn">';
                $html .= esc_html__( 'Sign in with Google', 'post-smtp' );
                $html .= '</a>';
                $html .= "<p>By signing in with Google, you can send emails using different 'From' addresses. To do this, disable the 'Force From Email' setting and use your registered aliases as the 'From' address across your WordPress site.</p> <p>Removing the OAuth connection will give you the ability to redo the OAuth connection or link to another Google account.</p>";
        }
    }

    $html .= '</div>';

    return $html;
}

    /**
     * Render Emailit Settings
     */
    public function render_emailit_settings() {
        $api_key = null !== $this->options->getEmailitApiKey() ? esc_attr ( $this->options->getEmailitApiKey() ) : '';
        $html = sprintf(
            '<p><a href="%1$s" target="_blank">%2$s</a> %3$s</p>',
            esc_url( 'https://emailit.com/' ),
            __( 'Emailit', 'post-smtp' ),
            __( 'is a transactional email provider. Enter your API Key and Endpoint below.', 'post-smtp' )
        );
        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-emailit-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::EMAILIT_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">
        </div>';
        return $html;
    }

    /**
     * Render Maileroo Settings
     */
    public function render_maileroo_settings() {
        $api_key = null !== $this->options->getMailerooApiKey() ? esc_attr ( $this->options->getMailerooApiKey() ) : '';
        $html = sprintf(
            '<p><a href="%1$s" target="_blank">%2$s</a> %3$s</p>',
            esc_url( 'https://maileroo.com/' ),
            __( 'Maileroo', 'post-smtp' ),
            __( 'is a transactional email provider. Enter your API Key and Endpoint below.', 'post-smtp' )
        );
        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-maileroo-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MAILEROO_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">
        </div>';
        return $html;
    }

    /**
     * Render Mandrill Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_mandrill_settings() {

        $api_key = null !== $this->options->getMandrillApiKey() ? esc_attr ( $this->options->getMandrillApiKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate Mandrill mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/how-to-setup-mandrill-with-post-smtp/" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-mandrill-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MANDRILL_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://mandrillapp.com/settings/index" target="_blank">' . esc_html__( 'the API key', 'post-smtp' ) . '</a>' . esc_html__( ' in your Mandrill account.', 'post-smtp' ) . '</div>'
            .'
        </div>
        ';

        return $html;

    }


    /**
     * Render SendGrid Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_sendgrid_settings() {

        $api_key = null !== $this->options->getSendGridApiKey() ? esc_attr ( $this->options->getSendGridApiKey() ) : '';
        $selected_region = $this->options->getSendGridRegion() ? esc_attr( $this->options->getSendGridRegion() ) : 'AG';

        $html = '<p>' . esc_html__( 'It is easy to integrate SendGrid mailer to your WordPress website. We recommend you to check the ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/how-to-setup-sendgrid-with-post-smtp/" target="_blank">' . esc_html__( 'documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';



        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-sendgrid-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::SENDGRID_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">
            <div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://app.sendgrid.com/settings/api_keys" target="_blank">' . esc_html__( 'the API key above', 'post-smtp' ) . '</a> ' . esc_html__( 'in your SendGrid account.', 'post-smtp' ) . '</div>' .
        '</div>';

        // Region dropdown.
        $html .= '<div class="ps-form-control">';
        $html .= '<div><label>' . __( 'Region', 'post-smtp' ) . '</label></div>';
        $html .= '<select name="postman_options[' . esc_attr( PostmanOptions::SENDGRID_REGION ) . ']" class="ps-sendgrid-region">';
        $html .= '<option value="Global" ' . selected( $selected_region, 'Global', false ) . '>' . __( 'Global', 'post-smtp' ) . '</option>';
        $html .= '<option value="EU" ' . selected( $selected_region, 'EU', false ) . '>' . __( 'Europe (EU)', 'post-smtp' ) . '</option>';
        $html .= '</select>';
        $html .= '</div>';


        return $html;

    }


    /**
     * Render MailerSend Settings
     * 
     * @since 3.3.0
     * @version 1.0.0
     */
    public function render_mailersend_settings() {

        $api_key = null !== $this->options->getMailerSendApiKey() ? esc_attr ( $this->options->getMailerSendApiKey() ) : '';

        $html = '<p>' . esc_html__( 'It is easy to integrate MailerSend API mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/how-to-setup-mailersend-with-post-smtp/" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-mailersend-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MAILERSEND_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
         '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://app.mailersend.com/api-tokens" target="_blank">' . esc_html__( 'the API key', 'post-smtp' ) . '</a>' . esc_html__( ' in your Mailersend account.', 'post-smtp' ) . '</div>'
            .'
        </div>
        ';

        return $html;

    }


    /**
     * Render Mailgun Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_mailgun_settings() {

        $api_key = null !== $this->options->getMailgunApiKey() ? esc_attr ( $this->options->getMailgunApiKey() ) : '';
        $domain_name = null !== $this->options->getMailgunDomainName() ? esc_attr ( $this->options->getMailgunDomainName() ) : '';
        $region = null !== $this->options->getMailgunRegion() ? ' checked' : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate Mailgun mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/how-to-configure-post-smtp-with-mail-gun/" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-mailgun-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MAILGUN_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */
            sprintf(
                '<div class="ps-form-control-info">%1$s <a href="%2$s" target="_blank">%3$s</a></div><div class="ps-form-control-info">%4$s <a href="%5$s" target="_blank">%6$s</a></div>',
                __( 'Create an account at', 'post-smtp' ),
                esc_url( 'https://www.mailgun.com/' ),
                esc_attr( 'Mailgun' ),
                __( 'If you are already logged in follow this link to get an', 'post-smtp' ),
                esc_url( 'https://app.mailgun.com/settings/api_security' ),
                __( 'API Key.', 'post-smtp' )
            )
            .'
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Domain Name</label></div>
            <input type="text" class="ps-mailgun-domain-name" required data-error="'.__( 'Please Domain Name.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MAILGUN_DOMAIN_NAME ) .']" value="'.$domain_name.'" placeholder="Domain Name">
            <span class="ps-form-control-info">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */
            sprintf(
                '%1$s <a href="%2$s" target="_blank">%3$s</a>',
                __( ' Follow this link to get the Mailgun', 'post-smtp' ),
                esc_url( 'https://app.mailgun.com/app/sending/domains' ),
                __( 'Domain Name.', 'post-smtp' )
            )
            .'</span>
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Mailgun Europe Region?</label></div>
            <div class="ps-form-switch-control">
                <label class="ps-switch-1">
                    <input type="checkbox" '.$region.' name="postman_options['.esc_attr( PostmanOptions::MAILGUN_REGION ).']">
                    <span class="slider round"></span>
                </label> 
            </div>
            '.

            '<div class="ps-form-control-info">' . esc_html__( 'Set your endpoint in Europe if your business operates under EU laws. ', 'post-smtp' ) . '<a href="https://www.mailgun.com/about/regions/" target="_blank">' . esc_html__( 'Learn', 'post-smtp' ) . '</a></div>'
            .'
        </div> 
        ';

        return $html;

    }


    /**
     * Render Brevo Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_brevo_settings() {

        $api_key = null !== $this->options->getSendinblueApiKey() ? esc_attr ( $this->options->getSendinblueApiKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate Brevo mailer to your WordPress website. We recommend you to check the documentation for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-brevo-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::SENDINBLUE_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */
             '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://login.brevo.com/?target=https%3A%2F%2Fapp.brevo.com%2Fsettings%2Fkeys%2Fapi" target="_blank">' . esc_html__( 'the API key', 'post-smtp' ) . '</a>' . esc_html__( ' in your Brevo account.', 'post-smtp' ) . '</div>'
            .
        '</div>
        ';

        return $html;

    }


    /**
     * Render Resend Settings
     * 
     * @since 3.2.0
     * @version 1.0.0
     */
    public function render_resend_settings() {

        $api_key = null !== $this->options->getResendApiKey() ? esc_attr ( $this->options->getResendApiKey() ) : '';

        $html = sprintf(
            '<p><a href="%1$s" target="_blank">Resend</a> %2$s</p><p>%3$s</p><p>%4$s <a href="%5$s" target="_blank">%6$s</a>',
            esc_url( 'https://resend.com/' ),
            __( 'is a modern email API provider built for developers. It provides reliable email delivery with simple APIs and excellent deliverability.', 'post-smtp' ),
            __( 'Resend offers a free plan to send up to 100 emails per day and 3,000 emails per month. You can start testing immediately and upgrade when needed.', 'post-smtp' ),
            __( 'Let\'s get started with our', 'post-smtp' ),
            esc_url( 'https://postmansmtp.com/documentation/sockets-addons/how-to-setup-resend-with-post-smtp/' ),
            __( 'Resend Documentation', 'post-smtp' )
        );

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-resend-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::RESEND_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */
            sprintf(
                '<div class="ps-form-control-info">%1$s <a href="%2$s" target="_blank">%3$s</a></div><div class="ps-form-control-info">%4$s <a href="%5$s" target="_blank">%6$s</a></div>',
                __( 'Create an account at', 'post-smtp' ),
                esc_url( 'https://resend.com/' ),
                esc_attr( 'Resend.com' ),
                __( 'If you are already logged in follow this link to get an', 'post-smtp' ),
                esc_url( 'https://resend.com/api-keys' ),
                __( 'API Key.', 'post-smtp' )
            )
            .
        '</div>
        ';

        return $html;

    }


    /**
     * Render Postmark Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_postmark_settings() {

        $api_key = null !== $this->options->getPostmarkApiKey() ? esc_attr ( $this->options->getPostmarkApiKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate Postmark mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/postmark/" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-postmark-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::POSTMARK_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://account.postmarkapp.com/api_tokens" target="_blank">' . esc_html__( 'the API tokens', 'post-smtp' ) . '</a>' . esc_html__( ' in your Postmark account.', 'post-smtp' ) . '</div>'
            .'
        </div>
        ';

        return $html;

    }


    /**
     * Render Sparkpost Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_sparkpost_settings() {

        $api_key = null !== $this->options->getSparkPostApiKey() ? esc_attr ( $this->options->getSparkPostApiKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate SparkPost mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/sparkpost/" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-sparkpost-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::SPARKPOST_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://app.sparkpost.com/account/api-keys" target="_blank">' . esc_html__( 'the API key', 'post-smtp' ) . '</a>' . esc_html__( ' in your SparkPost account.', 'post-smtp' ) . '</div>'
            .'
        </div>
        ';

        return $html;

    }

    /**
     * Render ElasticEmail Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_elasticemail_settings() {

        $api_key = null !== $this->options->getElasticEmailApiKey() ? esc_attr ( $this->options->getElasticEmailApiKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate Elastic Email mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/configure-post-smtp-with-elastic-email" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-elasticemail-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::ELASTICEMAIL_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://elasticemail.com/account#/settings/new/manage-api" target="_blank">' . esc_html__( 'the API key', 'post-smtp' ) . '</a>' . esc_html__( ' in your Elastic Email account.', 'post-smtp' ) . '</div>'
            .
        '</div>
        ';

        return $html;

    }

    /**
     * Render Mailjet Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_mailjet_settings() {

        $api_key = null !== $this->options->getMailjetApiKey() ? esc_attr ( $this->options->getMailjetApiKey() ) : '';
        $secret_key = null !== $this->options->getMailjetApiKey() ? esc_attr ( $this->options->getMailjetSecretKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate Mailjet mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/configure-post-smtp-with-mailjet" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-elasticemail-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MAILJET_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key"></div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Secret Key</label></div>
            <input type="text" class="ps-elasticemail-secret-key" required data-error="'.__( 'Please enter Secret Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::MAILJET_SECRET_KEY ) .']" value="'.$secret_key.'" placeholder="Secret Key">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://app.mailjet.com/account/apikeys" target="_blank">' . esc_html__( 'API and Access information', 'post-smtp' ) . '</a>' . esc_html__( ' in your Mailjet account.', 'post-smtp' ) . '</div>'
            .
        '</div>
        ';

        return $html;

    }

    /**
     * Render SendPulse Settings
     * 
     * @since 2.9.0
     * @version 1.0.0
     */
    public function render_sendpulse_settings() {

        $api_key = null !== $this->options->getSendpulseApiKey() ? esc_attr ( $this->options->getSendpulseApiKey() ) : '';
        $secret_key = null !== $this->options->getSendpulseSecretKey() ? esc_attr ( $this->options->getSendpulseSecretKey() ) : '';


        $html = '<p>' . esc_html__( 'It is easy to integrate SendPulse mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/configure-post-smtp-with-sendpulse/?utm_source=plugin&utm_medium=wizard&utm_campaign=plugin" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>API ID</label></div>
            <input type="text" class="ps-sendpulse-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::SENDPULSE_API_KEY ) .']" value="'.$api_key.'" placeholder="API ID">
        '.
        sprintf(
            '<div class="ps-form-control-info"><a href="%1$s" target="_blank">%2$s</a> %3$s</div>',
            esc_url( 'https://sendpulse.com/features/transactional' ),
            __( 'Click here', 'post-smtp' ),
            __( 'to create an account at SendPulse', 'post-smtp' )
        ).
        sprintf(
            '<div class="ps-form-control-info">%1$s<a href="%2$s" target="_blank">%3$s</a></div>',
            __( 'If you are already logged in follow this ink to get your API ID from Sendpulse ', 'post-smtp' ),
            esc_url( 'https://login.sendpulse.com/settings/#api' ),
            __( 'Get API ID', 'post-smtp' )
        ).
        '</div>'
        ;

        $html .= '
        <div class="ps-form-control">
            <div><label>API Secret</label></div>
            <input type="text" class="ps-sendpulse-secret-key" required data-error="'.__( 'Please enter Secret Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::SENDPULSE_SECRET_KEY ) .']" value="'.$secret_key.'" placeholder="API Secret">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://login.sendpulse.com/settings/#api" target="_blank">' . esc_html__( 'the API credentials', 'post-smtp' ) . '</a>' . esc_html__( ' in your SendPulse account.', 'post-smtp' ) . '</div>'
            .
        '</div>
        ';

        return $html;

    }

    /**
     * Render Amazon SES Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_amazonses_settings() {

        $access_key_id = isset( $this->options_array[ PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_ACCESS_KEY_ID ] ) ? base64_decode( $this->options_array[ PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_ACCESS_KEY_ID ] ) : '';
        $access_key_secret = isset( $this->options_array[ PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_SECRET_ACCESS_KEY ] ) ? base64_decode( $this->options_array[ PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_SECRET_ACCESS_KEY ] ) : '';
        $region = isset( $this->options_array[ PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_REGION ] ) ? $this->options_array[ PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_REGION ] : '';


        $html = '<p>' . esc_html__( 'Due to the technical nature of this SMTP implementation, it is recommended to study this step-by-step guide at the time of setup.', 'post-smtp' ) . '</p>';
        $html .= '<p>⚠️ ' . esc_html__( 'You must have a working SSL certificate installed on your WordPress site to use it with Amazon SES.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>Access Key ID</label></div>
            <input type="text" class="ps-amazon-key-id" required data-error="'.__( 'Please enter Access Key ID', 'post-smtp' ).'" name="postman_options['. esc_attr( PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_ACCESS_KEY_ID ) .']" value="'.$access_key_id.'" placeholder="Access Key ID"></div>';

        $html .= '
        <div class="ps-form-control">
            <div><label>Access Key Secret</label></div>
            <input type="text" class="ps-amazon-key-secret" required data-error="'.__( 'Please enter Access Key Secret', 'post-smtp' ).'" name="postman_options['. esc_attr( PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_SECRET_ACCESS_KEY ) .']" value="'.$access_key_secret.'" placeholder="Access Key Secret">'.
            /**
             * Translators: %1$s Text, %2$s URL, %3$s URL Text, %4$s Text, %5$s URL, %6$s URL Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'If you are already logged in, ', 'post-smtp' ) . '<a href="https://us-east-1.console.aws.amazon.com/iamv2/home#/users" target="_blank">' . esc_html__( 'visit this link', 'post-smtp' ) . '</a>' . esc_html__( ' to get the Access Key ID and Secret Access Key.', 'post-smtp' ) . '</div>'
            .
        '</div>
        ';


        $html .= '
        <div class="ps-form-control">
            <div><label>SES Region</label></div>
            <input type="text" class="ps-amazon-region" required data-error="'.__( 'Please enter SES Region', 'post-smtp' ).'" name="postman_options['. esc_attr( PostSMTPSES\PostSmtpAmazonSesTransport::OPTION_REGION ) .']" value="'.$region.'" placeholder="SES Region">
            <span class="ps-form-control-info">' . esc_html__( 'Enter the correct region', 'post-smtp' ) . '</span>
        </div>
        ';

        return $html;

    }


    /**
     * Render Office365 Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_office365_settings() {

        $options = get_option( PostmanOptions::POSTMAN_OPTIONS );
        $app_client_id = isset( $options['office365_app_id'] ) ? base64_decode( $options['office365_app_id'] ) : '';
        $app_client_secret = isset( $options['office365_app_password'] ) ? base64_decode( $options['office365_app_password'] ) : '';
        $redirect_uri = admin_url();
        $required = ( isset( $_GET['success'] ) && $_GET['success'] == 1 ) ? '' : 'required';


        $html = '<p>' . esc_html__( 'To establish a SMTP connection, you will need to create an app in your Azure account. This step-by-step guide will walk you through the whole process.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>'.__( 'Application (Client) ID', 'post-smtp' ).'</label></div>
            <input type="text" class="ps-office365-client-id" required data-error="'.__( 'Please enter Application (Client) ID.', 'post-smtp' ).'" name="postman_options[office365_app_id]" value="'.$app_client_id.'" placeholder="Application (Client) ID">
            <span class="ps-form-control-info">'.
            '<div class="ps-form-control-info">' . esc_html__( 'You can find the ', 'post-smtp' ) . '<a href="https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize?redirect_uri=https%3A%2F%2Fportal.azure.com%2Fsignin%2Findex%2F&response_type=code%20id_token&scope=https%3A%2F%2Fmanagement.core.windows.net%2F%2Fuser_impersonation%20openid%20email%20profile&state=OpenIdConnect.AuthenticationProperties%3D3ck4pNl3uhpmQz6zVF-QK4L_RKv9glDdJlITzamc-wID4UbZU1Qb1lYDEbqyr7cc4qml3HIpLuGSbrYKEdzvAnslPezoXRu-_TkLEDHNWCPkZE2SqMJPPkcruP29vocPdJeuKpQbUtwtOQkHhU_0dJU_drkiHPqXROXPu9GJQZyJCyQ5rGsQWp0iZFhlRou7VL8PQOzgBoaCvcVH6XzNgZJFgmeYXjmxj7qK_RUQAcm1BkN2p30gkxAiDgtXHUBNFg-qk0aK_n2Nu-eACOL9oW1dZ2PckrjpZNo7SNgCoxG7dzqRAl3nH-hMoqrCq7HyvoA6LQQ9Bx6r071wB-cbwQA6oNP5E4GLAu9WpGs-tsFJvqnq-QR0PM-FZlD1ZupsKIuyNAWm0s4SlLneNh5hi8aMbVo5AJA5G7221N3Vz3zk3jVsD6kq5JZnJZLALPq6BdmTuBvZZfAF6_pSO47bgxdh6hUVNsRSCtGOqTsGcd8&response_mode=form_post&nonce=638717524432120598.YjE5MDc1ZDctYThiZS00NzZhLTgzOGMtZGYwMzMxMTAxNzA3MjFhMWE0OGQtMjIxMS00NDRlLWI5Y2UtODg1YmFjOTNmNTIw&client_id=c44b4083-3bb0-49c1-b47d-974e53cbdf3c&site_id=501430&client-request-id=844ca630-139b-496b-b93c-9a7b66797706&x-client-SKU=ID_NET472&x-client-ver=7.5.0.0" target="_blank">' . esc_html__( 'Find client id', 'post-smtp' ) . '</a>' . esc_html__( ' here.', 'post-smtp' ) . '</div>'
            .'</span>
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>'.__( 'Client Secret (Value)', 'post-smtp' ).'</label></div>
            <input type="text" class="ps-office365-client-secret" required data-error="'.__( 'Please enter Client Secret (Value).', 'post-smtp' ).'" name="postman_options[office365_app_password]" value="'.$app_client_secret.'" placeholder="Client Secret (Value)">
            <span class="ps-form-control-info">'.
            /**
             * Translators: %1$s URL, %2$s URL Text, %3$s Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can find the ', 'post-smtp' ) . '<a href="https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize?redirect_uri=https%3A%2F%2Fportal.azure.com%2Fsignin%2Findex%2F&response_type=code%20id_token&scope=https%3A%2F%2Fmanagement.core.windows.net%2F%2Fuser_impersonation%20openid%20email%20profile&state=OpenIdConnect.AuthenticationProperties%3D3ck4pNl3uhpmQz6zVF-QK4L_RKv9glDdJlITzamc-wID4UbZU1Qb1lYDEbqyr7cc4qml3HIpLuGSbrYKEdzvAnslPezoXRu-_TkLEDHNWCPkZE2SqMJPPkcruP29vocPdJeuKpQbUtwtOQkHhU_0dJU_drkiHPqXROXPu9GJQZyJCyQ5rGsQWp0iZFhlRou7VL8PQOzgBoaCvcVH6XzNgZJFgmeYXjmxj7qK_RUQAcm1BkN2p30gkxAiDgtXHUBNFg-qk0aK_n2Nu-eACOL9oW1dZ2PckrjpZNo7SNgCoxG7dzqRAl3nH-hMoqrCq7HyvoA6LQQ9Bx6r071wB-cbwQA6oNP5E4GLAu9WpGs-tsFJvqnq-QR0PM-FZlD1ZupsKIuyNAWm0s4SlLneNh5hi8aMbVo5AJA5G7221N3Vz3zk3jVsD6kq5JZnJZLALPq6BdmTuBvZZfAF6_pSO47bgxdh6hUVNsRSCtGOqTsGcd8&response_mode=form_post&nonce=638717524432120598.YjE5MDc1ZDctYThiZS00NzZhLTgzOGMtZGYwMzMxMTAxNzA3MjFhMWE0OGQtMjIxMS00NDRlLWI5Y2UtODg1YmFjOTNmNTIw&client_id=c44b4083-3bb0-49c1-b47d-974e53cbdf3c&site_id=501430&client-request-id=844ca630-139b-496b-b93c-9a7b66797706&x-client-SKU=ID_NET472&x-client-ver=7.5.0.0" target="_blank">' . esc_html__( 'client secret here', 'post-smtp' ) . '</a>' . esc_html__( '.', 'post-smtp' ) . '</div>'
            .'</span>
        </div>
        ';


        $html .= '
        <div class="ps-form-control">
            <div><label>'.__( 'Redirect URI', 'post-smtp' ).'</label></div>
            <input type="text" readonly class="ps-office365-redirect-uri" value="'.$redirect_uri.'">
            <span class="ps-form-control-info">'.
            /**
             * Translators: %1$s URL, %2$s URL Text, %3$s Text
             */

            '<div class="ps-form-control-info">' . esc_html__( 'You can place the ', 'post-smtp' ) . '<a href="https://login.microsoftonline.com/organizations/oauth2/v2.0/authorize?redirect_uri=https%3A%2F%2Fportal.azure.com%2Fsignin%2Findex%2F&response_type=code%20id_token&scope=https%3A%2F%2Fmanagement.core.windows.net%2F%2Fuser_impersonation%20openid%20email%20profile&state=OpenIdConnect.AuthenticationProperties%3D3ck4pNl3uhpmQz6zVF-QK4L_RKv9glDdJlITzamc-wID4UbZU1Qb1lYDEbqyr7cc4qml3HIpLuGSbrYKEdzvAnslPezoXRu-_TkLEDHNWCPkZE2SqMJPPkcruP29vocPdJeuKpQbUtwtOQkHhU_0dJU_drkiHPqXROXPu9GJQZyJCyQ5rGsQWp0iZFhlRou7VL8PQOzgBoaCvcVH6XzNgZJFgmeYXjmxj7qK_RUQAcm1BkN2p30gkxAiDgtXHUBNFg-qk0aK_n2Nu-eACOL9oW1dZ2PckrjpZNo7SNgCoxG7dzqRAl3nH-hMoqrCq7HyvoA6LQQ9Bx6r071wB-cbwQA6oNP5E4GLAu9WpGs-tsFJvqnq-QR0PM-FZlD1ZupsKIuyNAWm0s4SlLneNh5hi8aMbVo5AJA5G7221N3Vz3zk3jVsD6kq5JZnJZLALPq6BdmTuBvZZfAF6_pSO47bgxdh6hUVNsRSCtGOqTsGcd8&response_mode=form_post&nonce=638717524432120598.YjE5MDc1ZDctYThiZS00NzZhLTgzOGMtZGYwMzMxMTAxNzA3MjFhMWE0OGQtMjIxMS00NDRlLWI5Y2UtODg1YmFjOTNmNTIw&client_id=c44b4083-3bb0-49c1-b47d-974e53cbdf3c&site_id=501430&client-request-id=844ca630-139b-496b-b93c-9a7b66797706&x-client-SKU=ID_NET472&x-client-ver=7.5.0.0" target="_blank">' . esc_html__( 'redirect url', 'post-smtp' ) . '</a>' . esc_html__( ' as needed.', 'post-smtp' ) . '</div>'
            .'</span>
        </div>
        ';

        $html .= '
        <h3>'.__( 'Authorization (Required)', 'post-smtp' ).'</h3>
        <p>'.__( 'Before continuing, you\'ll need to allow this plugin to send emails using your Office 365 account.', 'post-smtp' ).'</p>
        <input type="hidden" '.$required.' data-error="Please authenticate by clicking Connect to Office 365" />
        <a class="button button-primary ps-blue-btn" id="ps-wizard-connect-office365">Connect to Office 365</a>';

        return $html;

    }

    
    /**
     * Render Gmail API Settings
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function render_zoho_settings() {

        $regions = array(
            'com'       => __( 'United States (US)', 'postsmtp-zoho' ),
            'eu'        => __( 'Europe (EU)', 'postsmtp-zoho' ),
            'in'        => __( 'India (IN)', 'postsmtp-zoho' ),
            'com.cn'    => __( 'China (CN)', 'postsmtp-zoho' ),
            'com.au'    => __( 'Australia (AU)', 'postsmtp-zoho' ),
            'jp'        => __( 'Japan (JP)', 'postsmtp-zoho' ),
        );
        $selected_region = isset( $this->options_array[ ZohoMailPostSMTP\ZohoMailTransport::OPTION_REGION ] ) ? $this->options_array[ ZohoMailPostSMTP\ZohoMailTransport::OPTION_REGION ]: '';
        
        $client_id = isset( $this->options_array[ ZohoMailPostSMTP\ZohoMailTransport::OPTION_CLIENT_ID ] ) ? $this->options_array[ ZohoMailPostSMTP\ZohoMailTransport::OPTION_CLIENT_ID ] : '';
        $client_secret = isset( $this->options_array[ ZohoMailPostSMTP\ZohoMailTransport::OPTION_CLIENT_SECRET ] ) ? base64_decode( $this->options_array[ ZohoMailPostSMTP\ZohoMailTransport::OPTION_CLIENT_SECRET ] ) : '';
        $required = ( isset( $_GET['success'] ) && $_GET['success'] == 1 ) ? '' : 'required';


            $html = '<p>' . esc_html__( 'It is recommended to study the ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/zoho-mail-pro/" target="_blank">' . esc_html__( 'Zoho Mail integration doc', 'post-smtp' ) . '</a>' . esc_html__( ' at the time of setup.', 'post-smtp' ) . '</p>';

        $html .= '
        <div class="ps-form-control">
            <div><label>Region</label></div>
            <select>';
        foreach( $regions as $key => $value ) {

            $selected = $key == $selected_region ? 'selected="selected"' : '';

            $html .= "<option value='{$key}' {$selected}>{$value}</option>";

        }
        $html .= '</select></div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Client ID</label></div>
            <input type="text" class="ps-zoho-client-id" required data-error="'.__( 'Please enter Client ID.', 'post-smtp' ).'" name="postman_options['. esc_attr( ZohoMailPostSMTP\ZohoMailTransport::OPTION_CLIENT_ID ) .']" value="'.$client_id.'" placeholder="Client ID">
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Client Secret</label></div>
            <input type="text" class="ps-zoho-client-secret" required data-error="'.__( 'Please enter Client Secret.', 'post-smtp' ).'" name="postman_options['. esc_attr( ZohoMailPostSMTP\ZohoMailTransport::OPTION_CLIENT_SECRET ) .']" value="'.$client_secret.'" placeholder="Client Secret">
            <div class="ps-form-control-info">
                ' . esc_html__( 'Check your ', 'post-smtp' ) . '<a href="https://api-console.zoho.com/" target="_blank">' . esc_html__( 'Zoho API credentials', 'post-smtp' ) . '</a>' . esc_html__( ' to find the Client ID and Secret.', 'post-smtp' ) . '
            </div>
        </div>
        ';

        $html .= '
        <div class="ps-form-control">
            <div><label>Redirect URI</label></div>
            <input type="text" class="ps-zoho-redirect-uri" value="'.admin_url( 'admin.php?page=postman/' ).'" readonly>
            <span class="ps-form-control-info">
            '.__( 'Please copy this URL into the "Redirect URL" field of your Zoho account settings.', 'post-smtp' ).'
            </span>
        </div>
        ';
        
        $html .= '
        <h3>'.__( 'Authorization (Required)', 'post-smtp' ).'</h3>
        <p>'.__( 'Before continuing, you\'ll need to allow this plugin to send emails using Zoho.', 'post-smtp' ).'</p>
        <input type="hidden" '.$required.' data-error="Please authenticate by clicking Connect to Zoho" />
        <a href="'.admin_url( 'admin.php?postman/configuration_wizard&action=zoho_auth_request' ).'" class="button button-primary ps-blue-btn" id="ps-wizard-connect-zoho">Connect to Zoho</a>';

        return $html;

    }

    public function render_smtp2go_settings() {
        ob_start();

        $api_key = null === $this->options->getSmtp2GoApiKey() ? '' : esc_attr( $this->options->getSmtp2GoApiKey() );


        echo '<p>' . esc_html__( 'It is easy to integrate SMTP2GO mailer to your WordPress website. We recommend you to ', 'post-smtp' ) . '<a href="https://postmansmtp.com/documentation/sockets-addons/how-to-setup-smtp2go-with-post-smtp/" target="_blank">' . esc_html__( 'check the documentation', 'post-smtp' ) . '</a>' . esc_html__( ' for a successful integration.', 'post-smtp' ) . '</p>';

        echo '<div class="ps-form-control">
            <div><label>API Key</label></div>
            <input type="text" class="ps-smtp2go-api-key" required data-error="'.__( 'Please enter API Key.', 'post-smtp' ).'" name="postman_options['. esc_attr( PostmanOptions::SMTP2GO_API_KEY ) .']" value="'.$api_key.'" placeholder="API Key">';

        echo '<div class="ps-form-control-info">' . esc_html__( 'You can find ', 'post-smtp' ) . '<a href="https://app-eu.smtp2go.com/sending/apikeys/" target="_blank">' . esc_html__( 'the API key', 'post-smtp' ) . '</a>' . esc_html__( ' in your SMTP2GO account.', 'post-smtp' ) . '</div>';

        echo '</div>';

        return ob_get_clean();
    }


    /**
     * Save Wizard | AJAX Callback
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function save_wizard() {

        $form_data = array();
        parse_str( $_POST['FormData'], $form_data );
        $response = false;

        if( 
            isset( $_POST['action'] )
            &&
            'ps-save-wizard' == $_POST['action'] 
            &&
            wp_verify_nonce( $form_data['security'], 'post-smtp' )
        ) {

            if( isset( $form_data['postman_options'] ) && !empty( $form_data['postman_options'] ) ) {
                
                $sanitized = post_smtp_sanitize_array( $form_data['postman_options'] );
                
                $options = get_option( PostmanOptions::POSTMAN_OPTIONS );
                $_options = $options;
                $options = $options ? $options : array();
                
                //for the checkboxes
                $sanitized['prevent_sender_email_override'] = isset( $sanitized['prevent_sender_email_override'] ) ? 1 : '';
                $sanitized['prevent_sender_name_override'] = isset( $sanitized['prevent_sender_name_override'] ) ? 1 : '';
                
                //Envelop Email Address
                $sanitized['envelope_sender'] = isset( $sanitized['sender_email'] ) ? $sanitized['sender_email'] : '';

                //Encode API Keys
                $sanitized['office365_app_id'] = isset( $sanitized['office365_app_id'] ) ? $sanitized['office365_app_id'] : '';
                $sanitized['office365_app_password'] = isset( $sanitized['office365_app_password'] ) ? $sanitized['office365_app_password'] : '';
                $sanitized[PostmanOptions::SENDINBLUE_API_KEY] = isset( $sanitized[PostmanOptions::SENDINBLUE_API_KEY] ) ? $sanitized[PostmanOptions::SENDINBLUE_API_KEY] : '';
                $sanitized['sparkpost_api_key'] = isset( $sanitized['sparkpost_api_key'] ) ? $sanitized['sparkpost_api_key'] : '';
                $sanitized['postmark_api_key'] = isset( $sanitized['postmark_api_key'] ) ? $sanitized['postmark_api_key'] : '';
                $sanitized['mailgun_api_key'] = isset( $sanitized['mailgun_api_key'] ) ? $sanitized['mailgun_api_key'] : '';
                $sanitized[PostmanOptions::SENDGRID_API_KEY] = isset( $sanitized[PostmanOptions::SENDGRID_API_KEY] ) ? $sanitized[PostmanOptions::SENDGRID_API_KEY] : '';
                $sanitized['sendgrid_region']  = isset( $sanitized['sendgrid_region'] ) ? $sanitized['sendgrid_region'] : '';
                $sanitized['resend_api_key']  = isset( $sanitized['resend_api_key'] ) ? $sanitized['resend_api_key'] : '';
                $sanitized[PostmanOptions::EMAILIT_API_KEY]  = isset( $sanitized[PostmanOptions::EMAILIT_API_KEY] ) ? $sanitized[PostmanOptions::EMAILIT_API_KEY] : '';
                $sanitized[PostmanOptions::MAILEROO_API_KEY]  = isset( $sanitized[PostmanOptions::MAILEROO_API_KEY] ) ? $sanitized[PostmanOptions::MAILEROO_API_KEY] : '';
                $sanitized['mandrill_api_key'] = isset( $sanitized['mandrill_api_key'] ) ? $sanitized['mandrill_api_key'] : '';
                $sanitized[PostmanOptions::MAILERSEND_API_KEY] = isset( $sanitized[PostmanOptions::MAILERSEND_API_KEY] ) ? $sanitized[PostmanOptions::MAILERSEND_API_KEY] : '';
                $sanitized['elasticemail_api_key'] = isset( $sanitized['elasticemail_api_key'] ) ? $sanitized['elasticemail_api_key'] : '';
                $sanitized[PostmanOptions::MAILJET_API_KEY] = isset( $sanitized[PostmanOptions::MAILJET_API_KEY] ) ? $sanitized[PostmanOptions::MAILJET_API_KEY] : '';
                $sanitized[PostmanOptions::MAILJET_SECRET_KEY] = isset( $sanitized[PostmanOptions::MAILJET_SECRET_KEY] ) ? $sanitized[PostmanOptions::MAILJET_SECRET_KEY] : '';
                $sanitized['basic_auth_password'] = isset( $sanitized['basic_auth_password'] ) ? $sanitized['basic_auth_password'] : '';
                $sanitized['ses_access_key_id'] = isset( $sanitized['ses_access_key_id'] ) ? $sanitized['ses_access_key_id'] : '';
                $sanitized['ses_secret_access_key'] = isset( $sanitized['ses_secret_access_key'] ) ? $sanitized['ses_secret_access_key'] : '';
                $sanitized['ses_region'] = isset( $sanitized['ses_region'] ) ? $sanitized['ses_region'] : '';
                $sanitized['enc_type'] = 'tls';
                $sanitized['auth_type'] = 'login';
                $sanitized['slack_token'] = base64_decode( isset( $options['slack_token'] ) ? $options['slack_token'] : '' );
                $sanitized['pushover_user'] = base64_decode( isset( $options['pushover_user'] ) ? $options['pushover_user'] : '' );
                $sanitized['pushover_token'] = base64_decode( isset( $options['pushover_token'] ) ? $options['pushover_token'] : '' );
                foreach( $sanitized as $key => $value ) {
                    $options[$key] = $value;
                }
                
                if( $options == $_options ) {
                    $response = true;
                } else {
                    $response = update_option( PostmanOptions::POSTMAN_OPTIONS , $options );
                }
                
            }
            
        }
        //Prevent redirection
        delete_transient( PostmanSession::ACTION );

        wp_send_json( array(), 200 );

    }

    /**
     * Callback function to handle AJAX requests for updating the 'post_smtp_pro' option.
     *
     * This function listens for AJAX requests and updates the 'bonus_extensions' array
     * in the 'post_smtp_pro' option. It adds or removes the 'gmail-oneclick' extension
     * based on whether the checkbox is checked or not.
     *
     * @return void
     */
    public function update_post_smtp_pro_option_callback() {

        // Capability check: Only allow admins
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_send_json_error( array( 'message' => 'Unauthorized.' ) );
            return;
        }

        // Nonce check for CSRF protection
        if ( ! isset( $_POST['_wpnonce'] ) || ! wp_verify_nonce( $_POST['_wpnonce'], 'update_post_smtp_pro_option' ) ) {
            wp_send_json_error( array( 'message' => 'Invalid or missing nonce.' ) );
            return;
        }

        if ( ! isset( $_POST['enabled'] ) ) {
            wp_send_json_error( array( 'message' => 'Invalid request.' ) );
            return;
        }

        $options = get_option( 'post_smtp_pro', [] );
        if ( ! isset( $options['extensions'] ) ) {
            $options['extensions'] = [];
        }

        $enabled_value = sanitize_text_field( $_POST['enabled'] );

        if ( ! empty( $enabled_value ) ) {
            if ( ! in_array( $enabled_value, $options['extensions'] ) ) {
                $options['extensions'][] = $enabled_value;
            }
        } else {
            $options['extensions'] = array_diff( $options['extensions'], ['gmail-oneclick'] );
        }

        update_option( 'post_smtp_pro', $options );

        wp_send_json_success( array( 'message' => 'Option updated successfully!' ) );
    }


    /**
     * Redirect to Zoho Authentication
     * 
     * @since 2.7.0
     * @version 1.0.0
     */
    public function auth_zoho() {

        $zoho_mailer = new PostSMTP_ZohoMail();
        $oauthClient = $zoho_mailer->zohomail_configuration();
        $PostmanOauthClient = new ZohoMailPostSMTP\ZohoMailOauth( $oauthClient );
        $state = get_transient( PostSMTP_ZohoMail::STATE );
        // Save client state so we can validate in response
        
        if ( $state === false ) {
            $state = bin2hex( random_bytes( 32 / 2 ) );
            set_transient( PostSMTP_ZohoMail::STATE, $state, 5 * MINUTE_IN_SECONDS );
        }
        
        // // Generate the auth URL
        $redirect_url = $PostmanOauthClient->getZohoMailAuthURL( array(
            'state' => $state,
        ) );

        wp_redirect( $redirect_url );

    }

    /**
     * Handles the removal of Gmail OAuth credentials from the WordPress database.
     *
     * This function processes a form submission to delete the stored OAuth access token
     * and user email associated with Gmail API integration. It validates the request's
     * nonce for security, performs the deletion, and redirects the user back to the settings
     * page with a success message.
     */
    public function post_smtp_remove_oauth_action() {
        // Verify the nonce to ensure the request is secure and valid.
        if ( ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], 'remove_oauth_action' ) ) {
            wp_die( esc_html__( 'Nonce verification failed. Please try again.', 'post-smtp' ) );
        }

        // Remove the OAuth access token option from the WordPress database.
        delete_option( 'postman_auth_token' );

        // Redirect the user back to the settings page with a success query parameter.
        wp_redirect( admin_url( "admin.php?socket=gmail_api&step=2&page=postman/configuration_wizard" ) );

        // Terminate script execution to prevent further processing after the redirect.
        exit;
    }

    /**
     * Handles the OAuth redirect, retrieves the token parameters from the URL,
     * saves them in WordPress options, and redirects the user to a settings page.
     *
     * This function is used when OAuth authorization is completed and the user is
     * redirected back with the access token, refresh token, expiration time, message, 
     * and user email. It sanitizes the URL parameters and saves them to the WordPress 
     * options table to be used later in the application.
     *
     * After processing, the user is redirected to a settings page for confirmation.
     */
    public function handle_gmail_oauth_redirect() {
        // Check if the required OAuth parameters are present in the URL.
        if ( isset( $_GET['action'] ) && $_GET['action'] === 'gmail_oauth_redirect' ) {
            
        // Capability check: Only allow administrators to update OAuth tokens
        if ( ! current_user_can( 'manage_options' ) ) {
            wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'post-smtp' ) );
        }
        
        // CSRF protection: Verify nonce (required by security report)
        if ( ! isset( $_GET['_wpnonce'] ) || empty( $_GET['_wpnonce'] ) ) {
            wp_die( esc_html__( 'Security check failed. Nonce is missing.', 'post-smtp' ) );
        }
        
        // Verify the nonce
        $nonce = sanitize_text_field( $_GET['_wpnonce'] );
        if ( ! wp_verify_nonce( $nonce, 'gmail_oauth_redirect' ) ) {
            wp_die( esc_html__( 'Security check failed. Invalid nonce. Please try again.', 'post-smtp' ) );
        }
            
            // Sanitize and retrieve URL parameters
            $access_token  = isset( $_GET['access_token'] ) ? sanitize_text_field( $_GET['access_token'] ) : null;
            $refresh_token = isset( $_GET['refresh_token'] ) ? sanitize_text_field( $_GET['refresh_token'] ) : null;
            $expires_in    = isset( $_GET['expires_in'] ) ? intval( $_GET['expires_in'] ) : 0;
            $msg           = isset( $_GET['msg'] ) ? sanitize_text_field( $_GET['msg'] ) : '';
            $user_email    = isset( $_GET['user_email'] ) ? sanitize_email( $_GET['user_email'] ) : '';
            $auth_token_expires = time() + $expires_in;

            if ( $access_token ) {
                $oauth_data = array(
                    'access_token'      => $access_token,
                    'refresh_token'     => $refresh_token,
                    'auth_token_expires'=> $auth_token_expires,
                    'vendor_name'       => 'google',
                    'user_email'        => $user_email,
                );
                // Save the OAuth parameters to the WordPress options table.
                update_option( 'postman_auth_token', $oauth_data );
            }
        }
    }



}

new Post_SMTP_New_Wizard();

endif;