<?php

/**
 * Plugin Name: AF Translate
 * Plugin URI:  https://afthemes.com/
 * Author URI:  https://afthemes.com/
 * Description: AI Automated Translation for WordPress plugins and themes in your dashboard. Bulk localize your site safely in the background using OpenAI, Claude, and DeepL.
 * Version:     5.0.3
 * Author:      AF Themes
 * License:     GPL2
 * Text Domain: af-translate
 * Domain Path: /languages
 */

if (! defined('ABSPATH')) {
    exit;
}

// Establish strict global boundary constraints
final class AF_Translate
{

    /**
     * Singleton instance holding tracking registration context.
     */
    private static $instance = null;

    /**
     * Main Class Instance Accessor Wrapper.
     */
    public static function instance()
    {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Clones are locked down to secure the structural lifecycle.
     */
    public function __clone()
    {
        _doing_it_wrong(__FUNCTION__, esc_html__('Cheatin&#8217; uh?', 'af-translate'), '5.0.0');
    }

    /**
     * Unserializing instances is disabled for security containment.
     */
    public function __wakeup()
    {
        _doing_it_wrong(__FUNCTION__, esc_html__('Cheatin&#8217; uh?', 'af-translate'), '5.0.0');
    }

    /**
     * Construct engine lifecycle configurations.
     */
    private function __construct()
    {
        $this->define_constants();
        $this->load_dependencies();
        $this->init_hooks();
    }

    /**
     * System path definition maps.
     */
    private function define_constants()
    {
        if (! defined('AF_TRANSLATE_FILE')) {
            define('AF_TRANSLATE_FILE', __FILE__);
        }
        if (! defined('AF_TRANSLATE_BASE')) {
            define('AF_TRANSLATE_BASE', plugin_basename(AF_TRANSLATE_FILE));
        }
        if (! defined('AF_TRANSLATE_DIR')) {
            define('AF_TRANSLATE_DIR', dirname(AF_TRANSLATE_FILE));
        }
        if (! defined('AF_TRANSLATE_PATH')) {
            define('AF_TRANSLATE_PATH', plugin_dir_path(__FILE__));
        }
        if (! defined('AF_TRANSLATE_URL')) {
            define('AF_TRANSLATE_URL', plugin_dir_url(__FILE__));
        }

        // Add an optional indicator lookup helper
        if (! defined('AF_TRANSLATE_IS_PRO')) {
            define('AF_TRANSLATE_IS_PRO', class_exists('AF_Translate_Pro') || defined('AF_TRANSLATE_PRO_FILE'));
        }

        // =========================================================================
        // DYNAMIC ASSET VERSION ENGINE (CACHE BUSTER)
        // =========================================================================
        if (! defined('AF_TRANSLATE_VERSION')) {
            if (defined('SCRIPT_DEBUG') && SCRIPT_DEBUG) {
                // Generates a fresh timestamp on every page load to completely bypass heavy caching during development
                define('AF_TRANSLATE_VERSION', time());
            } else {
                // Production Fallback: Change this version number whenever you release a new update
                define('AF_TRANSLATE_VERSION', '5.0.1');
            }
        }
    }

    /**
     * High-performance memory-optimized asset loading schema.
     */
    private function load_dependencies()
    {
        // Shared global multi-dimensional localization data configurations
        require_once AF_TRANSLATE_PATH . 'includes/class-i18n-data.php';
        require_once AF_TRANSLATE_PATH . 'includes/class-af-translate.php';

        // Critical Performance Safeguard: Execute heavy analysis suites only on back-end requests
        if (is_admin()) {
            require_once AF_TRANSLATE_PATH . 'includes/class-bundle-analyzer.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-translate-scanner.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-translate-path-resolver.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-project-config.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-project-ajax.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-editor-view.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-file-pot-generator.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-file-compiler.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-file-stream.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-file-ajax.php';

            require_once AF_TRANSLATE_PATH . 'includes/class-editor-path-validator.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-editor-po-processor.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-editor-ajax-handler.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-translate-ai-engine.php';
            require_once AF_TRANSLATE_PATH . 'includes/class-translate-ai-ajax.php';
        }
    }

    /**
     * Standard runtime execution initialization hooks.
     */
    private function init_hooks()
    {
        add_action('plugins_loaded', array($this, 'boot_core_engine'));

        /**
         * CRITICAL GLOBAL HOOKS: Intercepts and redirects PHP (.l10n.php / .mo) and JS (.json) translations.
         * Must run globally (outside of is_admin) so frontend visitors and admin views see custom strings.
         */
        
        // 1. WP 6.5+ Filter: Intercepts BOTH .l10n.php and .mo files
        add_filter('load_translation_file', array($this, 'af_translate_load_from_uploads'), 10, 2);

        // 2. WP < 6.5 Fallback Filter: Intercepts legacy .mo files
        add_filter('load_textdomain_mofile', array($this, 'af_translate_load_from_uploads'), 10, 2);

        // 3. Script Translation Filter: Intercepts Gutenberg / React JS Jed .json files
        add_filter('load_script_translation_file', array($this, 'af_translate_load_json_from_uploads'), 10, 3);

        add_filter('plugin_row_meta', [$this, 'plugin_row_meta'], 10, 2);
        add_filter('plugin_action_links_' . AF_TRANSLATE_BASE, [$this, 'plugin_action_links']);
    }

    public function plugin_action_links($links)
    {
        $settings_link = sprintf('<a href="%1$s">%2$s</a>', admin_url('admin.php?page=af-translate'), esc_html__('Get Started', 'af-translate'));

        array_unshift($links, $settings_link);

        $links['af-translate-ai-connecter'] = sprintf('<a href="%1$s">%2$s</a>', admin_url('admin.php?page=af-translate-ai-connecter'), esc_html__('AI Settings', 'af-translate'));

        return $links;
    }

    public function plugin_row_meta($plugin_meta, $plugin_file)
    {
        if (AF_TRANSLATE_BASE === $plugin_file) {
            $row_meta = [
                'af-translate-plugins' => sprintf('<a href="%1$s">%2$s</a>', admin_url('admin.php?page=af-translate-plugins'), esc_html__('Translate Plugins', 'af-translate')),
                'af-translate-themes'  => sprintf('<a href="%1$s">%2$s</a>', admin_url('admin.php?page=af-translate-themes'), esc_html__('Translate Themes', 'af-translate')),
            ];

            $plugin_meta = array_merge($plugin_meta, $row_meta);
        }

        return $plugin_meta;
    }

    /**
     * Intercepts PHP translation file loading for both .mo and WP 6.5+ .l10n.php formats.
     *
     * @param string $file   Path to the translation file WP is attempting to load.
     * @param string $domain Text domain.
     * @return string Path to custom upload file if present, otherwise original path.
     */
    public function af_translate_load_from_uploads($file, $domain)
    {
        if ('default' === $domain || empty($file)) {
            return $file;
        }

        $filename = basename($file);

        // 1. Determine requested file extension (.l10n.php or .mo)
        $ext = '';
        if (false !== strpos($filename, '.l10n.php')) {
            $ext = '.l10n.php';
        } elseif (false !== strpos($filename, '.mo')) {
            $ext = '.mo';
        } else {
            return $file; // Exit if file type isn't supported
        }

        // 2. Extract locale pattern: {domain}-{locale}.{ext} or {locale}.{ext}
        $pattern = '/^(?:' . preg_quote($domain, '/') . '-)?(.+)' . preg_quote($ext, '/') . '$/';

        if (!preg_match($pattern, $filename, $matches)) {
            return $file;
        }

        $locale          = $matches[1];
        $upload_dir      = wp_upload_dir();
        $base_path       = trailingslashit($upload_dir['basedir']) . 'af-translate/';
        $target_filename = $domain . '-' . $locale . $ext;

        $directories = [
            $base_path . 'themes/',
            $base_path . 'plugins/',
            $base_path . 'core/'
        ];

        // 3. Search custom uploads sandbox for custom translation override
        foreach ($directories as $dir) {
            $found = $this->find_file_case_insensitive($dir, $target_filename);
            if ($found) {
                return $found;
            }
        }

        return $file;
    }

    /**
     * Redirects JS Script translation loading (.json) to uploads/af-translate/
     *
     * @param string|false $file   Path to the JSON translation file WP found, or false.
     * @param string       $handle Script handle registered in WP.
     * @param string       $domain Text domain.
     * @return string|false Path to custom JSON file if found, otherwise original.
     */
    public function af_translate_load_json_from_uploads($file, $handle, $domain)
    {
        if ('default' === $domain) {
            return $file;
        }

        $upload_dir = wp_upload_dir();
        $base_path  = trailingslashit($upload_dir['basedir']) . 'af-translate/';

        $directories = [
            $base_path . 'themes/',
            $base_path . 'plugins/',
            $base_path . 'core/'
        ];

        $locale = determine_locale();

        // 1. Check Exact WP File Match (Covers WP calculated MD5 hashes e.g. covernews-de_DE-33503a82....json)
        if (!empty($file)) {
            $filename = basename($file);
            foreach ($directories as $dir) {
                $found = $this->find_file_case_insensitive($dir, $filename);
                if ($found) {
                    return $found;
                }
            }
        }

        // 2. Check Handle-Based Specific File (e.g., covernews-de_DE-aftheme-dashboard.json)
        $handle_json = "{$domain}-{$locale}-{$handle}.json";
        foreach ($directories as $dir) {
            $found = $this->find_file_case_insensitive($dir, $handle_json);
            if ($found) {
                return $found;
            }
        }

        // 3. Check Primary Domain File Fallback (e.g., covernews-de_DE.json)
        $primary_json = "{$domain}-{$locale}.json";
        foreach ($directories as $dir) {
            $found = $this->find_file_case_insensitive($dir, $primary_json);
            if ($found) {
                return $found;
            }
        }

        return $file;
    }

    /**
     * Case-insensitive file search helper
     */
    private function find_file_case_insensitive($directory, $filename)
    {
        $directory = wp_normalize_path($directory);
        if (!is_dir($directory)) {
            return false;
        }

        $target = trailingslashit($directory) . $filename;
        if (file_exists($target)) {
            return $target;
        }

        $lower_filename = strtolower($filename);
        $files          = scandir($directory);
        if (is_array($files)) {
            foreach ($files as $file) {
                if (strtolower($file) === $lower_filename) {
                    return trailingslashit($directory) . $file;
                }
            }
        }

        return false;
    }

    /**
     * Instantiates the foundational translation controller framework safely.
     */
    public function boot_core_engine()
    {
        // 1. Boot the core foundational translation framework
        if (class_exists('AF_Translate_Core')) {
            new AF_Translate_Core();
        }

        // 2. Ignite the streaming download hooks for admin-post.php
        if (class_exists('AF_Translate_File_Streaming')) {
            AF_Translate_File_Streaming::init_hooks();
        }

        // 3. Editor Workbench AJAX Actions
        if (class_exists('AF_Translate_Editor_AJAX_Handler')) {
            add_action('wp_ajax_af_translate_save_pot', array('AF_Translate_Editor_AJAX_Handler', 'handle_save'));
        }

        // 4. Extended Utilities AJAX Actions
        if (class_exists('AF_Translate_Ajax_Extended')) {
            // Workspace Management
            add_action('wp_ajax_af_translate_init_locale', array('AF_Translate_Ajax_Extended', 'ajax_init_po_handler'));
            add_action('wp_ajax_af_translate_import_po', array('AF_Translate_Ajax_Extended', 'ajax_import_po_handler'));

            // Direct Raw PO File Operations
            add_action('wp_ajax_af_translate_save_po', array('AF_Translate_Ajax_Extended', 'ajax_save_po_handler'));
        }

        /**
         * POLYMORPHIC ROUTER: Intercepts the shared action hook collision
         * and safely directs traffic to the correct engine component.
         */
        add_action('wp_ajax_af_translate_sync_po', array($this, 'route_sync_po_requests'));

        /**
         * Freemius.
         */
        if (!class_exists('AF_Translate_Pro')) {
            require_once(AF_TRANSLATE_DIR . '/freemius.php');
        }
    }

    /**
     * Polymorphic AJAX Router to handle shared action hook collisions safely.
     * Evaluates parameters to differentiate between the editor screen and portability screen.
     */
    public function route_sync_po_requests()
    {
        // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Operational routing controller check; verification is safely deferred to downstream workbench sync execution context handlers.
        if (isset($_POST['po_file_target']) && class_exists('AF_Translate_Editor_AJAX_Handler')) {
            AF_Translate_Editor_AJAX_Handler::handle_sync();
            exit;
        }

        // phpcs:ignore WordPress.Security.NonceVerification.Missing -- Operational routing controller check; verification is safely deferred to downstream module dashboard sync handlers.
        if (isset($_POST['component']) && class_exists('AF_Translate_Ajax_Extended')) {
            AF_Translate_Ajax_Extended::ajax_sync_po_handler();
            exit;
        }

        wp_send_json_error(esc_html__('Invalid transaction routing parameter signature.', 'af-translate'));
    }
}

/**
 * Accessor function shortcut to instantiate the architectural controller context.
 *
 * @return AF_Translate
 */
function af_translate_engine()
{
    return AF_Translate::instance();
}

// Ignite operational plugin setup
af_translate_engine();