Gplug

<?php
/**
 * Plugin Name:       Hello Healthy Unified
 * Plugin URI:        https://hellohealthy.store/
 * Description:       A unified plugin for all Hello Healthy integrations. Provides shortcodes for embedding a quiz/checkout iframe, a Gemini-powered quiz generator, and a secure API proxy.
 * Version:           3.0.0
 * Author:            Hello Healthy
 * Author URI:        https://hellohealthy.store/
 * Text Domain:       hello-healthy-unified
 */

if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly.
}

/**
 * Main plugin class for all Hello Healthy integrations.
 */
final class Hello_Healthy_Unified_Plugin {

    private const GEMINI_API_KEY_OPTION = 'hh_gemini_api_key';

    /**
     * Constructor. Hooks all actions and filters.
     */
    public function __construct() {
        // Admin hooks for settings page.
        add_action('admin_menu', [$this, 'add_admin_menu']);
        add_action('admin_init', [$this, 'settings_init']);

        // Frontend script and style hooks.
        add_action('wp_enqueue_scripts', [$this, 'enqueue_analytics_scripts']);
        add_action('wp_enqueue_scripts', [$this, 'enqueue_quiz_assets']);

        // REST API initialization.
        add_action('rest_api_init', [$this, 'register_rest_routes']);

        // Register all shortcodes.
        add_shortcode('hellohealthy_quiz_iframe', [$this, 'shortcode_quiz_iframe']);
        add_shortcode('hellohealthy_checkout_iframe', [$this, 'shortcode_checkout_iframe']);
        add_shortcode('hellohealthy_gemini_quiz', [$this, 'shortcode_gemini_quiz']);

        // Elementor integration.
        add_action('elementor/widgets/widgets_registered', [$this, 'register_elementor_widget']);

        // Register the uninstall hook.
        register_uninstall_hook(__FILE__, ['Hello_Healthy_Unified_Plugin', 'on_uninstall']);
    }

    // =================================================================
    // Settings Page Setup
    // =================================================================

    public function add_admin_menu() {
        add_options_page(
            'Hello Healthy Unified Settings',
            'Hello Healthy',
            'manage_options',
            'hh-unified-settings',
            [$this, 'render_options_page']
        );
    }

    public function settings_init() {
        register_setting('hh_unified_settings', 'hellohealthy_frontend_url', ['type' => 'string', 'sanitize_callback' => 'esc_url_raw']);
        register_setting('hh_unified_settings', 'hellohealthy_backend_url', ['type' => 'string', 'sanitize_callback' => 'esc_url_raw']);
        register_setting('hh_unified_settings', 'hellohealthy_ga_id', ['type' => 'string', 'sanitize_callback' => 'sanitize_text_field']);
        register_setting('hh_unified_settings', 'hellohealthy_pixel_id', ['type' => 'string', 'sanitize_callback' => 'sanitize_text_field']);
        register_setting('hh_unified_settings', self::GEMINI_API_KEY_OPTION, ['type' => 'string', 'sanitize_callback' => 'sanitize_text_field']);

        add_settings_section('hh_integration_section', 'Integration Settings', null, 'hh-unified-settings');
        add_settings_field('hellohealthy_frontend_url', 'Frontend URL', [$this, 'render_settings_field'], 'hh-unified-settings', 'hh_integration_section', ['name' => 'hellohealthy_frontend_url', 'type' => 'text', 'placeholder' => 'https://frontend-xyz.run.app']);
        add_settings_field('hellohealthy_backend_url', 'Backend URL', [$this, 'render_settings_field'], 'hh-unified-settings', 'hh_integration_section', ['name' => 'hellohealthy_backend_url', 'type' => 'text', 'placeholder' => 'https://backend-xyz.run.app']);

        add_settings_section('hh_analytics_section', 'Analytics Tracking IDs', null, 'hh-unified-settings');
        add_settings_field('hellohealthy_ga_id', 'GA4 Measurement ID', [$this, 'render_settings_field'], 'hh-unified-settings', 'hh_analytics_section', ['name' => 'hellohealthy_ga_id', 'type' => 'text', 'placeholder' => 'G-XXXXXXXXXX']);
        add_settings_field('hellohealthy_pixel_id', 'Facebook Pixel ID', [$this, 'render_settings_field'], 'hh-unified-settings', 'hh_analytics_section', ['name' => 'hellohealthy_pixel_id', 'type' => 'text', 'placeholder' => '123456789012345']);

        add_settings_section('hh_gemini_section', 'Gemini API Settings', '<p>Settings for the on-page Gemini quiz generator.</p>', 'hh-unified-settings');
        add_settings_field(self::GEMINI_API_KEY_OPTION, 'Gemini API Key', [$this, 'render_settings_field'], 'hh-unified-settings', 'hh_gemini_section', ['name' => self::GEMINI_API_KEY_OPTION, 'type' => 'password']);
    }

    public function render_settings_field($args) {
        $value = esc_attr(get_option($args['name'], ''));
        $type = esc_attr($args['type'] ?? 'text');
        $placeholder = esc_attr($args['placeholder'] ?? '');
        printf('<input type="%s" name="%s" value="%s" class="regular-text" placeholder="%s" />', $type, esc_attr($args['name']), $value, $placeholder);
    }

    public function render_options_page() {
        if (!current_user_can('manage_options')) return;
        ?>
        <div class="wrap">
            <h1>Hello Healthy Unified Settings</h1>
            <form action="options.php" method="post">
                <?php
                settings_fields('hh_unified_settings');
                do_settings_sections('hh-unified-settings');
                submit_button();
                ?>
            </form>
            <h2>Usage Instructions</h2>
            <p>Use the following shortcodes on your pages:</p>
            <ul>
                <li><strong>Iframe Quiz:</strong> <code>[hellohealthy_quiz_iframe]</code> - Embeds the main quiz application.</li>
                <li><strong>Iframe Checkout:</strong> <code>[hellohealthy_checkout_iframe]</code> - Embeds the checkout page.</li>
                <li><strong>Gemini Quiz Generator:</strong> <code>[hellohealthy_gemini_quiz topic="nutrition basics"]</code> - Generates a single quiz question.</li>
            </ul>
        </div>
        <?php
    }

    // =================================================================
    // Analytics and Asset Enqueueing
    // =================================================================

    public function enqueue_analytics_scripts() {
        $ga_id = get_option('hellohealthy_ga_id');
        if (!empty($ga_id)) {
            wp_enqueue_script('hellohealthy-ga', "https://www.googletagmanager.com/gtag/js?id=" . esc_attr($ga_id), [], null, false);
            wp_add_inline_script('hellohealthy-ga', "window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', '" . esc_js($ga_id) . "');");
        }

        $pixel_id = get_option('hellohealthy_pixel_id');
        if (!empty($pixel_id)) {
            wp_register_script('hellohealthy-pixel', '', [], null, false); // Dummy handle
            wp_enqueue_script('hellohealthy-pixel');
            wp_add_inline_script('hellohealthy-pixel', "!function(f,b,e,v,n,t,s){if(f.fbq)return;n=f.fbq=function(){n.callMethod?n.callMethod.apply(n,arguments):n.queue.push(arguments)};if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';n.queue=[];t=b.createElement(e);t.async=!0;t.src=v;s=b.getElementsByTagName(e)[0];s.parentNode.insertBefore(t,s)}(window,document,'script','https://connect.facebook.net/en_US/fbevents.js'); fbq('init', '" . esc_js($pixel_id) . "'); fbq('track', 'PageView');");
        }
    }

    public function enqueue_quiz_assets() {
        global $post;
        if (is_a($post, 'WP_Post') && has_shortcode($post->post_content, 'hellohealthy_gemini_quiz')) {
            wp_enqueue_script('hh-quiz-js', plugin_dir_url(__FILE__) . 'assets/hh-quiz.js', ['jquery'], '1.0.0', true);
            wp_enqueue_style('hh-quiz-css', plugin_dir_url(__FILE__) . 'assets/hh-quiz.css', [], '1.0.0');
        }
    }

    // =================================================================
    // Iframe and REST API Proxy
    // =================================================================

    public function shortcode_quiz_iframe() {
        $frontend_url = get_option('hellohealthy_frontend_url', 'https://frontend-xyz.run.app');
        $iframe_id = 'hh_quiz_iframe_' . wp_generate_uuid4();

        $html = '<iframe id="' . esc_attr($iframe_id) . '" src="' . esc_url($frontend_url) . '" style="width:100%;height:80vh;border:none;"></iframe>';
        $html .= "<script>
            (function(){
                var el = document.getElementById('". esc_js($iframe_id) ."');
                if (!el) return;
                el.addEventListener('load', function() {
                    try { if (typeof gtag === 'function') { gtag('event', 'quiz_started', { event_category: 'Funnel' }); } } catch(e) {}
                    try { if (typeof fbq === 'function') { fbq('track', 'QuizStarted'); } } catch(e) {}
                });
            })();
        </script>";
        return $html;
    }

    public function shortcode_checkout_iframe() {
        $backend_url = get_option('hellohealthy_backend_url', 'https://backend-xyz.run.app');
        $iframe_id = 'hh_checkout_iframe_' . wp_generate_uuid4();

        $html = '<iframe id="' . esc_attr($iframe_id) . '" src="' . esc_url($backend_url) . '" style="width:100%;height:80vh;border:none;"></iframe>';
        $html .= "<script>
            (function(){
                var el = document.getElementById('". esc_js($iframe_id) ."');
                if (!el) return;
                el.addEventListener('load', function() {
                    try { if (typeof gtag === 'function') { gtag('event', 'checkout_initiated', { event_category: 'Funnel' }); } } catch(e) {}
                    try { if (typeof fbq === 'function') { fbq('track', 'InitiateCheckout'); } } catch(e) {}
                });
            })();
        </script>";
        return $html;
    }

    public function register_rest_routes() {
        register_rest_route('hellohealthy/v1', '/quiz', [
            'methods'  => 'POST',
            'callback' => [$this, 'handle_quiz_proxy'],
            'permission_callback' => function ($request) {
                return wp_verify_nonce($request->get_header('X-WP-Nonce'), 'wp_rest');
            },
        ]);
    }

    public function handle_quiz_proxy($request) {
        $backend_url = get_option('hellohealthy_backend_url', 'https://backend-xyz.run.app');
        if (empty($backend_url)) {
            return new WP_Error('no_backend_url', 'The backend URL is not configured.', ['status' => 503]);
        }

        $response = wp_remote_post(trailingslashit($backend_url) . 'quiz', [
            'body'    => $request->get_body(),
            'headers' => ['Content-Type' => 'application/json'],
            'timeout' => 20,
        ]);

        if (is_wp_error($response)) {
            return new WP_Error('api_error', 'Failed to reach backend service: ' . $response->get_error_message(), ['status' => 502]);
        }

        $code = wp_remote_retrieve_response_code($response);
        $body = wp_remote_retrieve_body($response);

        if ($code >= 400) {
            return new WP_Error('backend_error', 'Backend returned an error.', ['status' => $code, 'body' => $body]);
        }

        $data = json_decode($body, true);
        if (json_last_error() !== JSON_ERROR_NONE) {
            return new WP_Error('json_error', 'Failed to parse JSON response from backend.', ['status' => 500]);
        }

        return rest_ensure_response($data);
    }

    // =================================================================
    // Gemini Quiz Generator
    // =================================================================

    public function shortcode_gemini_quiz($atts) {
        $atts = shortcode_atts(['topic' => 'general health'], $atts, 'hellohealthy_gemini_quiz');
        $topic = sanitize_text_field($atts['topic']);

        $quiz = $this->generate_quiz_question($topic);
        if (is_wp_error($quiz)) {
            return '<div class="hh-quiz-error">Error: ' . esc_html($quiz->get_error_message()) . '</div>';
        }

        ob_start();
        ?>
        <div class="hh-quiz-wrap" data-answer="<?php echo esc_attr($quiz['correctAnswer'] ?? ''); ?>">
            <div class="hh-quiz-question"><?php echo esc_html($quiz['question']); ?></div>
            <form class="hh-quiz-form">
                <?php foreach (['optionA', 'optionB', 'optionC', 'optionD'] as $key) : ?>
                    <?php if (!empty($quiz[$key])) :
                        $id = 'hh_opt_' . wp_generate_uuid4(); ?>
                        <div class="hh-quiz-option">
                            <label for="<?php echo esc_attr($id); ?>">
                                <input type="radio" name="hh_quiz_choice" id="<?php echo esc_attr($id); ?>" value="<?php echo esc_attr($quiz[$key]); ?>">
                                <?php echo esc_html($quiz[$key]); ?>
                            </label>
                        </div>
                    <?php endif; ?>
                <?php endforeach; ?>
                <div style="margin-top:10px;">
                    <button type="button" class="hh-quiz-check button">Check Answer</button>
                    <button type="button" class="hh-quiz-show button">Show Answer</button>
                </div>
                <div class="hh-quiz-result" style="margin-top:10px; min-height: 1.2em;"></div>
            </form>
        </div>
        <?php
        return ob_get_clean();
    }

    private function generate_quiz_question($topic) {
        $api_key = get_option(self::GEMINI_API_KEY_OPTION);
        if (empty($api_key)) {
            return new WP_Error('no_key', 'The Gemini API key is not configured in settings.');
        }

        $prompt = "Generate a single multiple-choice quiz question for a health & fitness audience about: {$topic}. Respond in JSON with these exact keys: question, optionA, optionB, optionC, optionD, correctAnswer. The correctAnswer value must be one of the option values (e.g., 'optionB'). Keep answers short.";
        $endpoint = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent?key=' . rawurlencode($api_key);

        $response = wp_remote_post($endpoint, [
            'headers' => ['Content-Type' => 'application/json'],
            'body'    => wp_json_encode(['contents' => [['parts' => [['text' => $prompt]]]]]),
            'timeout' => 20,
        ]);

        if (is_wp_error($response)) {
            return $response;
        }

        $code = wp_remote_retrieve_response_code($response);
        $body = wp_remote_retrieve_body($response);

        if ($code >= 400) {
            return new WP_Error('api_http_error', 'Gemini API returned HTTP ' . intval($code), ['body' => $body]);
        }

        // Robustly extract JSON from the response, which may be wrapped in markdown backticks.
        if (preg_match('/```json\s*(\{.*?\})\s*```/s', $body, $matches) || preg_match('/(\{.*?\})/s', $body, $matches)) {
            $json_text = $matches[1];
            $data = json_decode($json_text, true);
            if (json_last_error() === JSON_ERROR_NONE && isset($data['question'])) {
                return $data;
            }
        }

        // Fallback for standard API structure if the above fails.
        $body_data = json_decode($body, true);
        if (isset($body_data['candidates'][0]['content']['parts'][0]['text'])) {
            $raw_text = $body_data['candidates'][0]['content']['parts'][0]['text'];
            if (preg_match('/(\{.*?\})/s', $raw_text, $text_matches)) {
                $data = json_decode($text_matches[1], true);
                if (json_last_error() === JSON_ERROR_NONE && isset($data['question'])) {
                    return $data;
                }
            }
        }

        return new WP_Error('parse_error', 'Unable to parse a valid quiz from the Gemini API response.');
    }

    // =================================================================
    // Elementor Widget
    // =================================================================

    public function register_elementor_widget() {
        if (!class_exists('\Elementor\Plugin')) {
            return;
        }

        class HH_Elementor_Quiz_Widget extends \Elementor\Widget_Base {
            public function get_name() { return 'hh_gemini_quiz_widget'; }
            public function get_title() { return 'Hello Healthy Gemini Quiz'; }
            public function get_icon() { return 'eicon-form-horizontal'; }
            public function get_categories() { return ['basic']; }

            protected function _register_controls() {
                $this->start_controls_section('content_section', ['label' => 'Content']);
                $this->add_control('topic', [
                    'label' => 'Quiz Topic',
                    'type' => \Elementor\Controls_Manager::TEXT,
                    'default' => 'general health',
                    'description' => 'Enter the topic for the quiz question (e.g., "cardio exercise").'
                ]);
                $this->end_controls_section();
            }

            protected function render() {
                $topic = $this->get_settings_for_display('topic');
                echo do_shortcode('[hellohealthy_gemini_quiz topic="' . esc_attr($topic) . '"]');
            }
        }

        \Elementor\Plugin::instance()->widgets_manager->register(new HH_Elementor_Quiz_Widget());
    }

    // =================================================================
    // Uninstall Hook
    // =================================================================

    public static function on_uninstall() {
        delete_option('hellohealthy_frontend_url');
        delete_option('hellohealthy_backend_url');
        delete_option('hellohealthy_ga_id');
        delete_option('hellohealthy_pixel_id');
        delete_option(self::GEMINI_API_KEY_OPTION);
    }
}

// Instantiate the plugin.
new Hello_Healthy_Unified_Plugin();