<?php

/**
 * AF Translate - Admin Panel Interface Router
 *
 * @package    AF_Translate
 * @subpackage AF_Translate/admin
 */

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

class AF_Translate_Admin
{

    /**
     * Wire menu and initialization hooks into administration space.
     */
    public function init()
    {
        add_action('admin_menu', array($this, 'register_admin_workspace'));
        add_action('admin_init', array($this, 'register_plugin_settings'));
        add_action('admin_enqueue_scripts', array($this, 'af_translate_enqueue_bulk_engine_assets'));

        // --- 1. Theme & Plugin Lifecycle Events ---
        add_action('after_switch_theme', array('AF_Translate_Admin', 'purge_analytics_cache'));
        add_action('activated_plugin', array('AF_Translate_Admin', 'purge_analytics_cache'));
        add_action('deactivated_plugin', array('AF_Translate_Admin', 'purge_analytics_cache'));
        add_action('deleted_plugin', array('AF_Translate_Admin', 'purge_analytics_cache'));
        add_action('deleted_theme', array('AF_Translate_Admin', 'purge_analytics_cache'));

        // --- 2. Core, Plugin & Theme Updates (Including Core Language Packs) ---
        add_action('upgrader_process_complete', array('AF_Translate_Admin', 'purge_analytics_cache'));

        // --- 3. Site Language & Locale Changes (General Settings) ---
        add_action('update_option_WPLANG', array('AF_Translate_Admin', 'purge_analytics_cache'));
        add_action('update_option_site_locale', array('AF_Translate_Admin', 'purge_analytics_cache'));

        // --- 4. AF Translate API Settings Updates ---
        add_action('update_option_af_translate_api_settings', array('AF_Translate_Admin', 'purge_analytics_cache'));
    }

    /**
     * Automatically purges the analytics transient cache when site configuration changes.
     */
    public static function purge_analytics_cache()
    {
        delete_transient('af_translate_analytics_cache');
    }

    /**
     * Whitelist and register the settings array for options.php processing.
     */
    public function register_plugin_settings()
    {
        register_setting(
            'af_translate_settings_group',
            'af_translate_api_settings',
            array(
                'type'              => 'array',
                'sanitize_callback' => array($this, 'sanitize_api_settings'),
                'default'           => array(),
            )
        );
    }

    /**
     * Clean and sanitize incoming API engine settings array.
     */
    public function sanitize_api_settings($input)
    {
        $sanitized = array();

        if (isset($input['active_provider'])) {
            $sanitized['active_provider'] = sanitize_key($input['active_provider']);
        }
        if (isset($input['microsoft_region'])) {
            $sanitized['microsoft_region'] = sanitize_text_field($input['microsoft_region']);
        }

        $prompt_keys = array('openai_custom_prompt', 'anthropic_custom_prompt', 'grok_custom_prompt', 'gemini_custom_prompt');
        foreach ($prompt_keys as $key) {
            if (isset($input[$key])) {
                $sanitized[$key] = sanitize_textarea_field($input[$key]);
            }
        }

        $key_fields = array('deepl_key', 'google_key', 'lecto_key', 'microsoft_key', 'openai_key', 'anthropic_key', 'grok_key', 'gemini_key', 'openai_model', 'anthropic_model', 'grok_model', 'gemini_model');
        foreach ($key_fields as $field) {
            if (isset($input[$field])) {
                $sanitized[$field] = sanitize_text_field(trim($input[$field]));
            }
        }

        return $sanitized;
    }

    /**
     * Registers structural parent node space alongside synchronized submenus.
     * Re-ordered based on user priority and simplified for intermediate clarity.
     */
    public function register_admin_workspace()
    {
        $capability = 'manage_options';

        // Main Parent Menu Node
        add_menu_page(
            esc_html__('AF Translate – AI Automated Translation Studio for WordPress', 'af-translate'),
            esc_html__('AF Translate', 'af-translate'),
            $capability,
            'af-translate',
            array($this, 'render_workspace_router'),
            'dashicons-translation',
            65
        );

        // 1. Dashboard (The central hub, matches parent slug to avoid duplicates)
        add_submenu_page(
            'af-translate',
            esc_html__('AF Translate Dashboard', 'af-translate'),
            esc_html__('Dashboard', 'af-translate'),
            $capability,
            'af-translate',
            array($this, 'render_workspace_router')
        );

        // 2. Translate Plugins (Highest priority search intent)
        add_submenu_page(
            'af-translate',
            esc_html__('Translate Installed Plugins', 'af-translate'),
            esc_html__('Translate Plugins', 'af-translate'),
            $capability,
            'af-translate-plugins',
            array($this, 'render_workspace_router')
        );

        // 3. Translate Themes (Second highest priority search intent)
        add_submenu_page(
            'af-translate',
            esc_html__('Translate Installed Themes', 'af-translate'),
            esc_html__('Translate Themes', 'af-translate'),
            $capability,
            'af-translate-themes',
            array($this, 'render_workspace_router')
        );

        // 4. Translate WordPress Core (Lower frequency utility task)
        add_submenu_page(
            'af-translate',
            esc_html__('Translate WordPress Core System', 'af-translate'),
            esc_html__('WordPress Core', 'af-translate'),
            $capability,
            'af-translate-core',
            array($this, 'render_workspace_router')
        );

        // 5. Site Languages (Informational configuration screen)
        add_submenu_page(
            'af-translate',
            esc_html__('Manage Localized Site Languages', 'af-translate'),
            esc_html__('Site Languages', 'af-translate'),
            $capability,
            'af-translate-languages',
            array($this, 'render_workspace_router')
        );

        // 6. AI Settings (Setup/Configuration - standard placement at the bottom)
        add_submenu_page(
            'af-translate',
            esc_html__('AI Engine Settings & API Keys', 'af-translate'),
            esc_html__('AI Settings', 'af-translate'),
            $capability,
            'af-translate-ai-connecter',
            array($this, 'render_workspace_router')
        );
    }

    /**
     * Register and Enqueue Dashboard Assets
     * Fully synchronized with chunked UI pagination constraints.
     *
     * @param string $hook The current admin page hook suffix.
     */
    public function af_translate_enqueue_bulk_engine_assets($hook)
    {
        if (false === strpos($hook, 'af-translate')) {
            return;
        }

        $settings         = get_option('af_translate_api_settings', array());
        $default_provider = isset($settings['active_provider']) ? sanitize_key($settings['active_provider']) : 'none';

        $engine_manifest = array(
            'deepl'     => __('DeepL Pro / Free Translator', 'af-translate'),
            'google'    => __('Google Translate Cloud v2 API', 'af-translate'),
            'lecto'     => __('Lecto AI Translation Engine', 'af-translate'),
            'microsoft' => __('Microsoft Cognitive Translator v3', 'af-translate'),
            'openai'    => __('OpenAI Core Engines (GPT-4o / Mini)', 'af-translate'),
            'anthropic' => __('Anthropic LLM Array (Claude 3.5 Sonnet)', 'af-translate'),
            'grok'      => __('xAI Enterprise Core (Grok 4)', 'af-translate'),
            'gemini'    => __('Google Gemini Flash / Pro Multimodal', 'af-translate'),
        );

        $available_providers = array();
        foreach ($engine_manifest as $slug => $label) {
            $key_field = ('microsoft' === $slug) ? 'microsoft_key' : $slug . '_key';

            if (! empty($settings[$key_field])) {
                $available_providers[] = array(
                    'slug'  => $slug,
                    'label' => $label
                );
            }
        }

        // Prepare the baseline configuration array for Free version
        $bulk_settings = array(
            'ajax_url'            => admin_url('admin-ajax.php'),
            'nonce'               => wp_create_nonce('af_translate_secure_action'),
            'available_providers' => $available_providers,
            'default_provider'    => $default_provider,
            'settings_url'        => admin_url('admin.php?page=af-translate-ai-connecter'),
            'strings'             => array(
                'cancel'             => __('Cancel', 'af-translate'),
                'run_batch'          => __('Execute Run', 'af-translate'),
                'initiating'         => __('Analyzing translation matrix blocks...', 'af-translate'),
                'processing'         => __('Translating chunk packages via AI engine...', 'af-translate'),
                'select_engine'      => __('Select AI Provider', 'af-translate'),
                'preview_loaded'     => __('Bulk Translation Preview Loaded!', 'af-translate'),
                'configure_title'    => __('Configure AI Bulk Engine Run', 'af-translate'),
                'filter_constraints' => __('Target Filter Constraints', 'af-translate'),
                'translate_empty'    => __('Translate Empty Tracks Only (Recommended)', 'af-translate'),
                'translate_all'      => __('Translate All Strings (Overwrite Existing)', 'af-translate'),
                'no_keys_title'      => __('AI API Keys Required', 'af-translate'),
                'no_keys_desc'       => __('No active AI translation engines were found. Please configure your API keys in the setup dashboard to unlock bulk translations.', 'af-translate'),
                'go_to_setup'        => __('Go to AI Setup', 'af-translate'),
                'configure_btn'      => __('Configure API Keys', 'af-translate'),
                'consulting_ai'      => __('Consulting AI models...', 'af-translate'),
            )
        );

        /**
         * EXTENSIBILITY BRIDGE HOOK
         * Allows the Pro version to intercept the configurations and inject calculation trees or toggle enable_preflight.
         */
        $bulk_settings = apply_filters('af_translate_bulk_settings', $bulk_settings);

        wp_enqueue_script(
            'af-translate-bulk-engine',
            AF_TRANSLATE_URL . 'assets/js/ai-translate-bulk.js',
            array('jquery'),
            AF_TRANSLATE_VERSION,
            true
        );

        wp_localize_script('af-translate-bulk-engine', 'afTranslateBulkSettings', $bulk_settings);

        wp_enqueue_script(
            'af-translate-workbench-engine',
            AF_TRANSLATE_URL . 'assets/js/ai-translate-workbench.js',
            array('jquery', 'af-translate-bulk-engine'),
            AF_TRANSLATE_VERSION,
            true
        );
    }

    /**
     * Directs administrative action requests and maps layout states.
     */
    public function render_workspace_router()
    {
        if (! current_user_can('manage_options')) {
            wp_die(esc_html__('Security Exception: You do not have sufficient permissions to access this page.', 'af-translate'));
        }

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        $current_page = isset($_GET['page']) ? sanitize_text_field(wp_unslash($_GET['page'])) : 'af-translate';

        $tab = 'overview';
        if ('af-translate-plugins' === $current_page) {
            $tab = 'plugins';
        } elseif ('af-translate-themes' === $current_page) {
            $tab = 'themes';
        } elseif ('af-translate-core' === $current_page) {
            $tab = 'wordpress';
        } elseif ('af-translate-languages' === $current_page) {
            $tab = 'languages';
        } elseif ('af-translate-ai-connecter' === $current_page) {
            $tab = 'settings';
        } else {
            // phpcs:ignore WordPress.Security.NonceVerification.Recommended
            $tab = isset($_GET['tab']) ? sanitize_key(wp_unslash($_GET['tab'])) : 'overview';
        }

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        $view = isset($_GET['view']) ? sanitize_key(wp_unslash($_GET['view'])) : '';
        // phpcs:ignore WordPress.Security.NonceVerification.Recommended
        $type = isset($_GET['type']) ? sanitize_key(wp_unslash($_GET['type'])) : 'theme';

        echo '<div class="wrap af-translate-wrapper">';

        if (! empty($view)) {
            // phpcs:ignore WordPress.Security.NonceVerification.Recommended
            $action = isset($_GET['action']) ? sanitize_key(wp_unslash($_GET['action'])) : 'dashboard';
            switch ($action) {
                case 'edit':
                    // phpcs:ignore WordPress.Security.NonceVerification.Recommended
                    $lang_target = isset($_GET['lang']) ? sanitize_key(wp_unslash($_GET['lang'])) : '';
                    AF_Translate_Editor_View::render($view, $type, $lang_target);
                    break;
                case 'setup':
                    AF_Translate_Project_Config::render_setup_panel($view, $type);
                    break;
                case 'new-lang':
                    AF_Translate_Project_Config::render_new_language_screen($view, $type);
                    break;
                case 'dashboard':
                default:
                    AF_Translate_Project_Config::render_project_dashboard($view, $type);
                    break;
            }
        } else {
            $this->render_global_header();
            $this->render_nav_tabs($tab);

            $view_map = array(
                'overview'  => 'overview-matrix.php',
                'languages' => 'languages-matrix.php',
                'wordpress' => 'wordpress-core-matrix.php',
                'settings'  => 'ai-setting-panel.php',
            );

            if (isset($view_map[$tab])) {
                $resolved_view_file = '';

                // Smart Path Containment Lookups
                $potential_paths = array(
                    plugin_dir_path(__FILE__) . 'views/' . $view_map[$tab],                  // admin/views/
                    plugin_dir_path(dirname(__FILE__)) . 'views/' . $view_map[$tab],         // root views/
                    plugin_dir_path(__FILE__) . $view_map[$tab]                              // direct file fallback
                );

                foreach ($potential_paths as $path) {
                    if (file_exists($path)) {
                        $resolved_view_file = $path;
                        break;
                    }
                }

                if (! empty($resolved_view_file)) {
                    include_once $resolved_view_file;
                } else {
                    printf(
                        '<div class="error"><p>%s <code>%s</code></p></div>',
                        esc_html__('Requested dashboard view file could not be found.', 'af-translate'),
                        esc_html('views/' . $view_map[$tab])
                    );
                }
            } elseif ('plugins' === $tab) {
                $this->render_all_extensions_matrix('plugin');
            } elseif ('themes' === $tab) {
                $this->render_all_extensions_matrix('theme');
            }
        }

        echo '</div>';
    }

    /**
     * Renders workspace branding interface.
     */
    private function render_global_header()
    {
?>
        <div class="af-translate-header" style="margin-bottom: 20px;">
            <h1><span class="dashicons dashicons-translation"></span> <?php esc_html_e('AF Translate – AI Automated Translation Studio for WordPress', 'af-translate'); ?></h1>
            <p class="description"><?php esc_html_e('AI Translation for WordPress core, plugins, and themes right in your dashboard. Bulk localize files safely in the background.', 'af-translate'); ?></p>
        </div>
    <?php
    }

    /**
     * Renders standard top-level dashboard tab bars matching submenu contexts.
     */
    private function render_nav_tabs($current_tab)
    {
    ?>
        <nav class="nav-tab-wrapper" style="margin-bottom:20px;">
            <!-- 1. Central Hub -->
            <a href="?page=af-translate&tab=overview" class="nav-tab <?php echo 'overview' === $current_tab ? 'nav-tab-active' : ''; ?>">
                <?php esc_html_e('Dashboard', 'af-translate'); ?>
            </a>

            <!-- 2. Primary Feature: Plugins (High Volume Search Intent) -->
            <a href="?page=af-translate-plugins" class="nav-tab <?php echo 'plugins' === $current_tab ? 'nav-tab-active' : ''; ?>">
                <?php esc_html_e('Translate Plugins', 'af-translate'); ?>
            </a>

            <!-- 3. Primary Feature: Themes (High Volume Search Intent) -->
            <a href="?page=af-translate-themes" class="nav-tab <?php echo 'themes' === $current_tab ? 'nav-tab-active' : ''; ?>">
                <?php esc_html_e('Translate Themes', 'af-translate'); ?>
            </a>

            <!-- 4. Secondary Feature: WordPress Core System -->
            <a href="?page=af-translate-core" class="nav-tab <?php echo 'wordpress' === $current_tab ? 'nav-tab-active' : ''; ?>">
                <?php esc_html_e('WordPress Core', 'af-translate'); ?>
            </a>

            <!-- 5. Utility Configuration: Active Site Locales -->
            <a href="?page=af-translate-languages" class="nav-tab <?php echo 'languages' === $current_tab ? 'nav-tab-active' : ''; ?>">
                <?php esc_html_e('Site Languages', 'af-translate'); ?>
            </a>

            <!-- 6. Engine Integration Setup -->
            <a href="?page=af-translate-ai-connecter" class="nav-tab <?php echo 'settings' === $current_tab ? 'nav-tab-active' : ''; ?>">
                <?php esc_html_e('AI Settings', 'af-translate'); ?>
            </a>
            <?php
            // Add this specific anchor action hook right here!
            do_action('af_translate_admin_nav_tabs', $current_tab);
            ?>
        </nav>
    <?php
    }

    /**
     * Scans and renders standard full matrix indexes across extension storage arrays.
     */
    private function render_all_extensions_matrix($type)
    {
        if ('plugin' === $type) {
            if (! function_exists('get_plugins')) {
                require_once ABSPATH . 'wp-admin/includes/plugin.php';
            }
            $items = get_plugins();
        } else {
            $items = wp_get_themes();
        }
    ?>
        <h2 class="section-title">
            <?php 'plugin' === $type ? esc_html_e('All Installed Plugins', 'af-translate') : esc_html_e('All Installed Themes', 'af-translate'); ?>
        </h2>
        <p class="description">
            <?php
            /* translators: %s: The type of extension assets being managed, such as 'plugins' or 'themes'. */
            printf(esc_html__('Manage and translate all your installed %s files using enterprise AI architectures.', 'af-translate'), esc_html($type));
            ?>
        </p>
        <table class="wp-list-table widefat fixed striped af-data-table" style="margin-top:15px;">
            <thead>
                <tr>
                    <th><?php esc_html_e('Name', 'af-translate'); ?></th>
                    <th><?php esc_html_e('Folder Name', 'af-translate'); ?></th>
                    <th><?php esc_html_e('Status', 'af-translate'); ?></th>
                    <th><?php esc_html_e('Actions', 'af-translate'); ?></th>
                </tr>
            </thead>
            <tbody>
                <?php
                foreach ($items as $key => $data) {
                    $slug = ('plugin' === $type) ? dirname($key) : $key;
                    if ('.' === $slug) {
                        $slug = basename($key, '.php');
                    }

                    $name      = ('plugin' === $type) ? $data['Name'] : $data->get('Name');
                    $is_active = ('plugin' === $type) ? is_plugin_active($key) : ($key === wp_get_theme()->get_stylesheet());
                    $domain    = ('plugin' === $type) ? (! empty($data['TextDomain']) ? $data['TextDomain'] : $slug) : ($data->get('TextDomain') ? $data->get('TextDomain') : $slug);

                    $target_menu_page = ('plugin' === $type) ? 'af-translate-plugins' : 'af-translate-themes';
                ?>
                    <tr>
                        <td><strong><?php echo esc_html($name); ?></strong></td>
                        <td><code><?php echo esc_html($domain); ?></code></td>
                        <td>
                            <?php
                            echo $is_active
                                ? '<span class="status-ok">' . esc_html__('Active', 'af-translate') . '</span>'
                                : '<span class="status-neutral">' . esc_html__('Inactive', 'af-translate') . '</span>';
                            ?>
                        </td>
                        <td>
                            <a href="?page=<?php echo esc_attr($target_menu_page); ?>&view=<?php echo urlencode($slug); ?>&type=<?php echo esc_attr($type); ?>" class="button button-secondary">
                                <?php esc_html_e('Open Dashboard', 'af-translate'); ?>
                            </a>
                        </td>
                    </tr>
                <?php
                }
                ?>
            </tbody>
        </table>
<?php
    }

    /**
     * Logs operational events securely into a capped db tracking stack.
     * Prevents system option bloat by enforcing a 100-entry max boundary layer.
     *
     * @param string $message Action description details string.
     * @param string $context Target translation element context reference.
     */
    public static function log_activity($message, $context)
    {
        $logs = get_option('af_translate_activity_logs', array());
        if (! is_array($logs)) {
            $logs = array();
        }

        // Structural operational tracking element mapping
        $new_entry = array(
            'time'    => current_time('mysql'),
            'message' => sanitize_text_field($message),
            'context' => sanitize_key($context),
            'user'    => get_current_user_id()
        );

        // Prepend new trace to the top of logs stack
        array_unshift($logs, $new_entry);

        // Threshold boundary engine - retain only the last 100 system entries
        if (count($logs) > 20) {
            $logs = array_slice($logs, 0, 20);
        }

        update_option('af_translate_activity_logs', $logs, false);
    }
}