<?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' ) );
    }

    /**
     * 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
     */
    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
                );
            }
        }

        wp_enqueue_script(
            'af-translate-bulk-engine',
            AF_TRANSLATE_URL . 'assets/js/ai-translate-bulk.js',
            array( 'jquery' ),
            '1.0.0',
            true
        );

        wp_localize_script( 'af-translate-bulk-engine', 'afTranslateBulkSettings', 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(
                'initiating'     => __( 'Analyzing translation matrix blocks...', 'af-translate' ),
                'processing'     => __( 'Translating empty nodes via AI engine...', 'af-translate' ),
                'complete'       => __( 'Catalog mapping completed successfully! Syncing view...', 'af-translate' ),
                'error'          => __( 'Automation process interrupted. Check engine logs.', 'af-translate' ),
                'select_engine'  => __( 'Select Translation Engine Context', 'af-translate' ),
                'run_batch'      => __( 'Run AI Batch Process', 'af-translate' ),
                'no_keys_title'  => __( 'No Connected Translation Engines Found', 'af-translate' ),
                'no_keys_desc'   => __( 'You need to configure at least one active API provider key before running translation engines.', 'af-translate' ),
                'configure_btn'  => __( 'Configure AI API &rarr;', 'af-translate' ),
                'cancel'         => __( 'Cancel', 'af-translate' ),
                'preview_loaded' => __( 'AI bulk translations loaded.', 'af-translate' ),
                'writing_disk'   => __( 'Writing updates to disk...', 'af-translate' ),
            )
        ) );

        wp_enqueue_script(
            'af-translate-workbench-engine',
            AF_TRANSLATE_URL . 'assets/js/ai-translate-workbench.js',
            array( 'jquery', 'af-translate-bulk-engine' ), 
            '1.0.0',
            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>
        </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 );
    }
}