<?php
if (!defined('ABSPATH')) exit; // Exit if accessed directly

if(!class_exists('qcld_wpopenrouter_addons')){


    /**
     * Main Class.
     */
    final class qcld_wpopenrouter_addons
    {
        private $id = 'Open AI';

        /**
         * WPBot Pro version.
         *
         * @var string
         */
        public $version = '1.0.6';
        
        /**
         * WPBot Pro helper.
         *
         * @var object
         */
        public $helper;

        /**
         * The single instance of the class.
         *
         * @var qcld_wb_Chatbot
         * @since 1.0.0
         */
        protected static $_instance = null;
        
        /**
         * Main wpbot Instance.
         *
         * Ensures only one instance of wpbot is loaded or can be loaded.
         *
         * @return qcld_wb_Chatbot - Main instance.
         * @since 1.0.0
         * @static
         */
        public static function instance() {
            if ( is_null( self::$_instance ) ) {
                self::$_instance = new self();
            }

            return self::$_instance;
        }

        public $response_list;

        /**
         *  Constructor
         */
        public function __construct()
        {

            $this->includes();
            add_action('wp_ajax_openai_save_assistant', [$this, 'save_assistant_callback']);
            add_action('wp_ajax_openrouter_response',[$this,'openrouter_response_callback']);
            add_action('wp_ajax_nopriv_openrouter_response', [$this, 'openrouter_response_callback']);
            add_action('wp_ajax_qcld_openrouter_settings_option',[$this,'qcld_openrouter_settings_option_callback']);

            add_action('wp_ajax_update_settings_option', [$this, 'qcld_update_settings_option_callback']);

            if (is_admin() && !empty($_GET["page"]) && (($_GET["page"] == "openai-panel_dashboard") || ($_GET["page"] == "openai-panel_file") || ($_GET["page"] == "openai-panel_help"))) {
                add_action('admin_enqueue_scripts', array($this, 'qcld_wb_chatbot_admin_scripts'));
            }
            //add_action('wp_enqueue_scripts', array($this, 'qcld_wb_chatbot_openrouter_scripts'));
            add_action('admin_enqueue_scripts', array($this, 'qcld_wb_chatbot_openrouter_admin_scripts'));
        }


        public function qcld_wb_chatbot_openrouter_admin_scripts() {
              if ( ! current_user_can( 'manage_options' ) ) {
                    return ;
                }
            wp_register_script(
                'qcld-wp-chatbot-openrouter-admin-js', 
                QCLD_wpCHATBOT_PLUGIN_URL . 'includes/integration/openrouter/assets/js/qcld-wp-openrouter-admin.js', 
                array('jquery'), 
                QCLD_wpCHATBOT_VERSION, 
                true
            );

            // Localize the script with necessary data
            wp_localize_script('qcld-wp-chatbot-openrouter-admin-js', 'qcld_gemini_admin_data', array(
                'ajax_url' => admin_url('admin-ajax.php'),
                'ajax_nonce' => wp_create_nonce('wp_chatbot'),
                'openrouter_api_key' => get_option('qcld_openrouter_api_key'),
                'openrouter_model' => get_option('qcld_openrouter_model'),
                'openrouter_enabled' => get_option('qcld_openrouter_enabled'),
                'qcld_openrouter_append_content' => get_option('qcld_openrouter_append_content'),
                'qcld_openrouter_prepend_content' => get_option('qcld_openrouter_prepend_content')
            ));
            
            wp_enqueue_script('qcld-wp-chatbot-openrouter-admin-js');
        }
        
        /**
         * Define wpbot Constants.
         *
         * @return void
         * @since 1.0.0
         */
        public function includes() {
            require_once( QCLD_wpCHATBOT_PLUGIN_DIR_PATH . "includes/Parsedown.php" );
            require_once( QCLD_wpCHATBOT_PLUGIN_DIR_PATH . "includes/class-common-function.php" );
        }
        public function qcld_openrouter_settings_option_callback() {
                $nonce = sanitize_text_field($_POST['nonce']);
                if (!wp_verify_nonce($nonce, 'wp_chatbot')) {
                    wp_send_json(array('success' => false, 'msg' => esc_html__('Failed in Security check', 'chatbot')));
                    wp_die();
                } else {
                    $openrouter_api_key = sanitize_text_field($_POST['openrouter_api_key']);
                    $openrouter_model = sanitize_text_field($_POST['openrouter_model']);
                    $openrouter_enabled = sanitize_text_field($_POST['openrouter_enabled']);
                    $qcld_openrouter_page_suggestion_enabled = sanitize_text_field($_POST['qcld_openrouter_page_suggestion_enabled']);
                    $opnrouter_is_context_awareness_enabled = sanitize_text_field($_POST['opnrouter_is_context_awareness_enabled']);
                    $qcld_openrouter_append_content = sanitize_text_field($_POST['qcld_openrouter_append_content']) ?? '';
                    $qcld_openrouter_prepend_content = sanitize_text_field($_POST['qcld_openrouter_prepend_content']) ?? '';
                    if($openrouter_api_key != '') {
                        update_option('qcld_openrouter_api_key', $openrouter_api_key);
                    }
                    if($openrouter_model != '') {
                        update_option('qcld_openrouter_model', $openrouter_model);
                    }
                    if($openrouter_enabled != '') {
                        update_option('qcld_openrouter_enabled', $openrouter_enabled);
                    }
                    if($openrouter_enabled == '1') {
                        update_option('ai_enabled', 0);
                        update_option('qcld_gemini_enabled', 0);
                    
                    } else {
                        update_option('ai_enabled', 1);
                        update_option('qcld_gemini_enabled', 0);
                    }
                    update_option('qcld_openrouter_page_suggestion_enabled', $qcld_openrouter_page_suggestion_enabled);
                    update_option('opnrouter_context_awareness_enabled', $opnrouter_is_context_awareness_enabled);
                    $openai_post_types = array();
                    if (isset($_POST['openai_post_type'])) {
                        $raw_post_types = wp_unslash($_POST['openai_post_type']);
                        if (is_array($raw_post_types)) {
                            $openai_post_types = array_map('sanitize_text_field', $raw_post_types);
                        } else {
                            $openai_post_types = sanitize_text_field($raw_post_types);
                        }
                    }
                    update_option('qcld_openai_relevant_post', $openai_post_types);
                    
                    update_option('qcld_openrouter_append_content', $qcld_openrouter_append_content);
                    update_option('qcld_openrouter_prepend_content', $qcld_openrouter_prepend_content);
                    
                }
                echo wp_json_encode($openrouter_enabled);
                wp_die();
        }
        public function openrouter_response_callback(){
            $openrouter_model = get_option('qcld_openrouter_model');
            $openrouter_api_key = get_option('qcld_openrouter_api_key');
            $keyword = $_POST['keyword'];
            $relevant_pagelink = Qcld_WPBot_Common_Functions::qcpd_relevant_pagelink($keyword);
            $relevant_pagelink = array_slice($relevant_pagelink, 0, 5, true);

            // Build context-aware messages with system instructions
            $messages = array();
            
            // Add system message with context if enabled
            if ( get_option('opnrouter_context_awareness_enabled') == '1' ) {
                $site_name = get_bloginfo('name');
                $site_desc = get_bloginfo('description');
                
                // Get current page URL and title more reliably
                $current_url = '';
                $page_title = '';
                $page_summary = '';
                
                // Try to get from referrer first
                $ref = wp_get_referer();
                if ( ! $ref && isset($_SERVER['HTTP_REFERER']) ) {
                    $ref = esc_url_raw( $_SERVER['HTTP_REFERER'] );
                }
                
                if ( $ref ) {
                    $current_url = $ref;
                    
                    // Try to get post/page by URL
                    $post_id = url_to_postid( $ref );
                    if ( $post_id ) {
                        $page_title = get_the_title( $post_id );
                        $raw_content = get_post_field( 'post_content', $post_id );
                        $text_content = wp_strip_all_tags( $raw_content );
                        $page_summary = wp_trim_words( $text_content, 120, '…' );
                    } else {
                        // If not a post/page, try to extract title from URL or use current page
                        $parsed_url = parse_url( $ref );
                        if ( isset($parsed_url['path']) ) {
                            $path = trim($parsed_url['path'], '/');
                            if ( ! empty($path) ) {
                                // Try to get title from current page if we're on it
                                if ( is_singular() ) {
                                    $page_title = get_the_title();
                                    $raw_content = get_the_content();
                                    $text_content = wp_strip_all_tags( $raw_content );
                                    $page_summary = wp_trim_words( $text_content, 120, '…' );
                                } elseif ( is_archive() ) {
                                    $page_title = get_the_archive_title();
                                } elseif ( is_search() ) {
                                    $page_title = 'Search Results';
                                } elseif ( is_404() ) {
                                    $page_title = 'Page Not Found';
                                }
                            }
                        }
                    }
                } else {
                    // Fallback to current page info
                    $scheme = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http");
                    $host = isset($_SERVER['HTTP_HOST']) ? sanitize_text_field($_SERVER['HTTP_HOST']) : '';
                    $request_uri = isset($_SERVER['REQUEST_URI']) ? sanitize_text_field($_SERVER['REQUEST_URI']) : '';
                    $current_url = esc_url_raw($scheme . '://' . $host . $request_uri);
                    
                    if ( is_singular() ) {
                        $page_title = get_the_title();
                        $raw_content = get_the_content();
                        $text_content = wp_strip_all_tags( $raw_content );
                        $page_summary = wp_trim_words( $text_content, 120, '…' );
                    } elseif ( is_archive() ) {
                        $page_title = get_the_archive_title();
                    } elseif ( is_search() ) {
                        $page_title = 'Search Results';
                    } elseif ( is_404() ) {
                        $page_title = 'Page Not Found';
                    }
                }

                $context_bits = array();
                if ( $site_name ) { $context_bits[] = 'Site: ' . $site_name; }
                if ( $site_desc ) { $context_bits[] = 'Tagline: ' . $site_desc; }
                if ( $page_title ) { $context_bits[] = 'Page title: ' . $page_title; }
                if ( $current_url ) { $context_bits[] = 'URL: ' . $current_url; }
                if ( $page_summary ) { $context_bits[] = 'Page summary: ' . $page_summary; }

                if ( ! empty( $context_bits ) ) {
                    $context_info = 'Context Information: ' . implode( '. ', $context_bits ) . '. Please use this context to provide more relevant and accurate responses.';
                    
                    // Add system message with context
                    $messages[] = array(
                        'role' => 'system',
                        'content' => $context_info
                    );
                }
            }
            
            // Add user message
            $messages[] = array(
                'role' => 'user',
                'content' => $keyword
            );
           
            if( (get_option('page_suggestion_enabled') == '1') && count($relevant_pagelink) > 0 ){
                
                $relevant_post_link = maybe_unserialize(get_option('qlcd_wp_chatbot_relevant_post_link_openai'));
                
                // Avoid call to undefined function get_wpbot_locale()
                $locale = ( function_exists('get_locale') ) ? get_locale() : 'en_US';
                if ( isset($relevant_post_link[$locale]) && is_array($relevant_post_link[$locale]) ) {
                    $relevant_pagelinks = '<br><br><p><em>' . implode('', $relevant_post_link[$locale]) . '</em><p>' . implode("</br>", $relevant_pagelink);
                } elseif ( isset($relevant_post_link[$locale]) ) {
                    $relevant_pagelinks = '<br><br><p><em>' . $relevant_post_link[$locale] . '</em><p>' . implode("</br>", $relevant_pagelink);
                } else {
                    $relevant_pagelinks = '<br><br><p><em></em><p>' . implode("</br>", $relevant_pagelink);
                }

               
            }else{
                $relevant_pagelinks = '';
            }
            $Qcld_Parsedown = new Qcld_Parsedown();
            $data = json_encode(array(
                'model' => $openrouter_model,
                'messages' => $messages
            ));

            $api_url = 'https://openrouter.ai/api/v1/chat/completions';
            
            // Use WordPress wp_remote_post for better error handling and consistency
            $args = array(
                'body'        => $data,
                'headers'     => array(
                    'Content-Type' => 'application/json',
                    'Authorization' => 'Bearer ' . $openrouter_api_key
                ),
                'timeout'     => 60,
                'redirection' => 5,
                'blocking'    => true,
                'httpversion' => '1.0',
                'sslverify'   => true,
            );

            $result = wp_remote_post($api_url, $args);
            
            // Check for WordPress errors
            if (is_wp_error($result)) {
                $response['status'] = 'error';
                $response['message'] = 'API request failed: ' . $result->get_error_message();
            } else {
                $http_code = wp_remote_retrieve_response_code($result);
                $response_body = wp_remote_retrieve_body($result);
                
                if ($http_code === 200) {
                    $msg = json_decode($response_body);
                    if(isset($msg->choices[0]->message->content)) {
                        $response['status'] = 'success';
                        $response['message'] = $Qcld_Parsedown->text($msg->choices[0]->message->content) . $relevant_pagelinks;
                    } else {
                        $response['status'] = 'error';
                        $response['message'] = 'Sorry, I encountered an error processing your AI request. Please check api key and try again later.';
                    }
                } else {
                    $response['status'] = 'error';
                    $response['message'] = 'API request failed with HTTP code: ' . $http_code;
                }
            }
            echo wp_json_encode($response);
            wp_die();
        }
        public function qcld_update_settings_option_callback(){
            update_option('disable_wp_chatbot_site_search',1);
            update_option('enable_wp_chatbot_post_content', '');
        }
    }

    /**
     * @return qcld_wpopenai_addon
     */
    if(!function_exists('qcld_wpopenrouter_addons')){
        function qcld_wpopenrouter_addons() {
            $qcld_wpopenrouter_addon = new qcld_wpopenrouter_addons();
            return $qcld_wpopenrouter_addon->instance();
        
        }
    }
  
    //fire off the plugin
    qcld_wpopenrouter_addons();

}