<?php
/**
 * The core plugin class.
 *
 * Loads all dependencies, defines admin and public hooks, and wires
 * everything together through the Schema_AI_Loader.
 *
 * @package Schema_AI
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

class Schema_AI {

    /**
     * The loader responsible for maintaining and registering all hooks.
     *
     * @var Schema_AI_Loader
     */
    protected $loader;

    /**
     * The unique identifier of this plugin.
     *
     * @var string
     */
    protected $plugin_name;

    /**
     * The current version of the plugin.
     *
     * @var string
     */
    protected $version;

    /**
     * Initialize the class and set its properties.
     */
    public function __construct() {
        $this->version     = SCHEMA_AI_VERSION;
        $this->plugin_name = 'ai-schema-gen';

        $this->load_dependencies();
        $this->define_admin_hooks();
        $this->define_public_hooks();
        $this->define_rest_api_hooks();
        $this->define_cron_hooks();
        $this->define_integration_hooks();
    }

    /**
     * Load all required dependencies for this plugin.
     */
    private function load_dependencies() {
        $dir = SCHEMA_AI_PLUGIN_DIR;

        // AI classes.
        require_once $dir . 'includes/ai/class-content-analyzer.php';
        require_once $dir . 'includes/ai/class-schema-suggester.php';
        require_once $dir . 'includes/ai/class-field-extractor.php';
        require_once $dir . 'includes/ai/class-ai-cache.php';

        // Schema classes.
        require_once $dir . 'includes/schema/types/class-base-schema.php';
        require_once $dir . 'includes/schema/types/class-article-schema.php';
        require_once $dir . 'includes/schema/types/class-product-schema.php';
        require_once $dir . 'includes/schema/types/class-recipe-schema.php';
        require_once $dir . 'includes/schema/types/class-local-business-schema.php';
        require_once $dir . 'includes/schema/types/class-service-schema.php';
        require_once $dir . 'includes/schema/types/class-faq-schema.php';
        require_once $dir . 'includes/schema/types/class-howto-schema.php';
        require_once $dir . 'includes/schema/types/class-event-schema.php';
        require_once $dir . 'includes/schema/types/class-review-schema.php';
        require_once $dir . 'includes/schema/types/class-person-schema.php';
        require_once $dir . 'includes/schema/types/class-organization-schema.php';
        require_once $dir . 'includes/schema/types/class-breadcrumb-schema.php';
        require_once $dir . 'includes/schema/types/class-video-schema.php';
        require_once $dir . 'includes/schema/types/class-image-schema.php';
        require_once $dir . 'includes/schema/types/class-course-schema.php';
        require_once $dir . 'includes/schema/class-schema-factory.php';
        require_once $dir . 'includes/schema/class-schema-generator.php';
        require_once $dir . 'includes/schema/class-schema-validator.php';
        require_once $dir . 'includes/schema/class-schema-renderer.php';
        require_once $dir . 'includes/schema/class-schema-cache.php';

        // Extraction classes (hybrid pipeline).
        require_once $dir . 'includes/extraction/class-accordion-detector.php';
        require_once $dir . 'includes/extraction/class-content-extractor.php';

        // Page categorization and schema decision (Phase 2 + 3).
        require_once $dir . 'includes/class-page-analyzer.php';
        require_once $dir . 'includes/class-schema-decision-engine.php';
        require_once $dir . 'includes/class-author-utils.php';

        // Business subtype mapping (Phase 4).
        require_once $dir . 'includes/class-business-subtype.php';

        // Site type system (Phase 6).
        require_once $dir . 'includes/class-site-type.php';

        // Entity authority system (Phase 7).
        require_once $dir . 'includes/class-entity-settings.php';
        require_once $dir . 'includes/class-schema-health-score.php';

        // New schema builders (Phase 6).
        require_once $dir . 'includes/schema/types/class-podcast-episode-schema.php';
        require_once $dir . 'includes/schema/types/class-software-application-schema.php';
        require_once $dir . 'includes/schema/types/class-creative-work-schema.php';

        // Automation classes.
        require_once $dir . 'includes/automation/class-auto-apply.php';
        require_once $dir . 'includes/automation/class-scheduler.php';
        require_once $dir . 'includes/automation/class-rule-engine.php';

        // Integration classes (6 files).
        require_once $dir . 'includes/integrations/class-woocommerce.php';
        require_once $dir . 'includes/integrations/class-elementor.php';
        require_once $dir . 'includes/integrations/class-gutenberg.php';
        require_once $dir . 'includes/integrations/class-yoast.php';
        require_once $dir . 'includes/integrations/class-rank-math.php';
        require_once $dir . 'includes/integrations/class-acf.php';

        // API classes.
        require_once $dir . 'includes/api/class-rest-controller.php';
        require_once $dir . 'includes/api/class-api-auth.php';
        require_once $dir . 'includes/api/endpoints/class-schema-endpoint.php';
        require_once $dir . 'includes/api/endpoints/class-generate-endpoint.php';
        require_once $dir . 'includes/api/endpoints/class-validate-endpoint.php';
        require_once $dir . 'includes/api/endpoints/class-analyze-endpoint.php';
        require_once $dir . 'includes/api/endpoints/class-templates-endpoint.php';
        require_once $dir . 'includes/api/endpoints/class-stats-endpoint.php';

        // Sync engine.
        require_once $dir . 'includes/class-sync.php';
        require_once $dir . 'includes/class-restore.php';

        // Bulk generator.
        require_once $dir . 'includes/class-bulk-generator.php';

        // Utility classes.
        require_once $dir . 'includes/utilities/class-logger.php';
        require_once $dir . 'includes/utilities/class-rate-limiter.php';
        require_once $dir . 'includes/utilities/class-usage-tracker.php';
        require_once $dir . 'includes/utilities/class-notifications.php';

        // Admin.
        require_once $dir . 'admin/class-admin.php';
        require_once $dir . 'admin/class-promo-banner.php';
        require_once $dir . 'admin/class-deactivation-feedback.php';

        // Public.
        require_once $dir . 'public/class-public.php';
        require_once $dir . 'public/class-schema-output.php';

        $this->loader = new Schema_AI_Loader();
    }

    /**
     * Register all admin-related hooks.
     */
    private function define_admin_hooks() {
        $admin = new Schema_AI_Admin( $this->get_plugin_name(), $this->get_version() );
        new Schema_AI_Promo_Banner();
        new Schema_AI_Deactivation_Feedback();

        // Admin menu and pages.
        $this->loader->add_action( 'admin_menu', $admin, 'add_admin_menu' );
        $this->loader->add_action( 'admin_enqueue_scripts', $admin, 'enqueue_styles' );
        $this->loader->add_action( 'admin_enqueue_scripts', $admin, 'enqueue_scripts' );

        // Meta box for post editor.
        $this->loader->add_action( 'add_meta_boxes', $admin, 'add_schema_meta_box' );
        $this->loader->add_action( 'save_post', $admin, 'save_schema_meta_box', 10, 2 );

        // Admin notices (constructor self-registers hooks).
        new Schema_AI_Notifications();

        // Plugin action links.
        $this->loader->add_filter( 'plugin_action_links_' . SCHEMA_AI_PLUGIN_BASENAME, $admin, 'add_action_links' );

        // Admin bar "Generate Schema" button on frontend.
        $this->loader->add_action( 'admin_bar_menu', $admin, 'add_admin_bar_generate', 100 );
        $this->loader->add_action( 'wp_enqueue_scripts', $admin, 'enqueue_admin_bar_script' );

        // One-time migration: validate any schemas still stuck in "pending" status.
        $this->loader->add_action( 'admin_init', $this, 'maybe_validate_pending_schemas' );

        // Auto-apply on post status transition.
        $auto_apply = new Schema_AI_Auto_Apply();
        $this->loader->add_action( 'transition_post_status', $auto_apply, 'on_publish', 10, 3 );
    }

    /**
     * Register all public-facing hooks.
     */
    private function define_public_hooks() {
        $public = new Schema_AI_Public( $this->get_plugin_name(), $this->get_version() );

        $this->loader->add_action( 'wp_enqueue_scripts', $public, 'enqueue_styles' );
        $this->loader->add_action( 'wp_enqueue_scripts', $public, 'enqueue_scripts' );

        // Schema JSON-LD output in wp_head.
        $schema_output = new Schema_AI_Schema_Output();
        $this->loader->add_action( 'wp_head', $schema_output, 'render_schema_json_ld', 1 );
    }

    /**
     * Register all REST API hooks.
     */
    private function define_rest_api_hooks() {
        // Schema CRUD endpoint.
        $schema_endpoint = new Schema_AI_Schema_Endpoint();
        $this->loader->add_action( 'rest_api_init', $schema_endpoint, 'register_routes' );

        // AI Generate endpoint.
        $generate_endpoint = new Schema_AI_Generate_Endpoint();
        $this->loader->add_action( 'rest_api_init', $generate_endpoint, 'register_routes' );

        // Validate endpoint.
        $validate_endpoint = new Schema_AI_Validate_Endpoint();
        $this->loader->add_action( 'rest_api_init', $validate_endpoint, 'register_routes' );

        // Analyze endpoint.
        $analyze_endpoint = new Schema_AI_Analyze_Endpoint();
        $this->loader->add_action( 'rest_api_init', $analyze_endpoint, 'register_routes' );

        // Templates endpoint.
        $templates_endpoint = new Schema_AI_Templates_Endpoint();
        $this->loader->add_action( 'rest_api_init', $templates_endpoint, 'register_routes' );

        // Stats endpoint.
        $stats_endpoint = new Schema_AI_Stats_Endpoint();
        $this->loader->add_action( 'rest_api_init', $stats_endpoint, 'register_routes' );
    }

    /**
     * Register all cron event hooks.
     */
    private function define_cron_hooks() {
        $scheduler = new Schema_AI_Scheduler();

        $this->loader->add_action( 'schema_ai_daily_cleanup', $scheduler, 'daily_cleanup' );
        $this->loader->add_action( 'schema_ai_usage_reset', $scheduler, 'usage_reset' );
        $this->loader->add_action( 'schema_ai_analytics_sync', $scheduler, 'analytics_sync' );
        $this->loader->add_action( 'schema_ai_validate', $scheduler, 'validate_schema', 10, 1 );
        $this->loader->add_action( 'schema_ai_bulk_validate', $scheduler, 'bulk_validate' );

        // Sync engine: 6-hour full sync + immediate single-page sync.
        $sync = new Schema_AI_Sync();
        // Register the interval directly so it exists when schedule() validates it via wp_get_schedules().
        // The loader only queues hooks — they aren't applied until run() — so we must bypass it here.
        add_filter( 'cron_schedules', array( $sync, 'add_cron_interval' ), 10, 1 );
        Schema_AI_Sync::schedule();
        $this->loader->add_action( Schema_AI_Sync::CRON_HOOK, $sync, 'run_sync' );
        $this->loader->add_action( 'schema_ai_sync_single', $sync, 'run_single_sync', 10, 1 );
        $this->loader->add_action( 'schema_ai_schema_saved', $sync, 'on_schema_saved', 10, 1 );

        // Two-way entity sync:
        //  - Stamp a local change timestamp whenever the entity profile is edited
        //    on this site, so the backend can tell which side is newer.
        //  - On wp-admin loads, pull the latest dashboard-side profile (throttled)
        //    so dashboard edits appear here without waiting for the 6-hour cron.
        $this->loader->add_action( 'update_option_schema_ai_settings', 'Schema_AI_Entity_Settings', 'track_change', 10, 2 );
        $this->loader->add_action( 'add_option_schema_ai_settings', 'Schema_AI_Entity_Settings', 'track_change', 10, 2 );
        $this->loader->add_action( 'admin_init', $sync, 'maybe_pull_on_admin' );

        // Restore-on-reinstall: fires when an API key is configured on an
        // otherwise-empty install (fresh install, or uninstall + reinstall).
        new Schema_AI_Restore();

        // Bulk generator: 15-second poll + rapid per-page hook.
        $bulk = new Schema_AI_Bulk_Generator();
        // Same: register the interval directly so schema_ai_15sec exists before schedule() calls wp_schedule_event().
        add_filter( 'cron_schedules', array( $bulk, 'add_cron_interval' ), 10, 1 );
        Schema_AI_Bulk_Generator::schedule();
        $this->loader->add_action( Schema_AI_Bulk_Generator::POLL_HOOK, $bulk, 'process_next' );
        $this->loader->add_action( Schema_AI_Bulk_Generator::NEXT_HOOK, $bulk, 'process_next' );
    }

    /**
     * Register all third-party integration hooks.
     */
    private function define_integration_hooks() {
        // WooCommerce integration.
        $woocommerce = new Schema_AI_WooCommerce();
        $this->loader->add_action( 'woocommerce_loaded', $woocommerce, 'init' );

        // Elementor integration.
        $elementor = new Schema_AI_Elementor();
        $this->loader->add_action( 'elementor/loaded', $elementor, 'init' );

        // Gutenberg: block editor integration not yet active (assets not built).

        // Yoast SEO: suppress all schema output.
        $yoast = new Schema_AI_Yoast();
        $this->loader->add_filter( 'wpseo_json_ld_output', $yoast, 'filter_yoast_schema', PHP_INT_MAX, 1 );

        // Rank Math: suppress all schema output across every output path.
        // 1. rank_math/json_ld  — main head-level schema graph.
        // 2. the_content        — FAQ blocks rendered inline in content (Gutenberg + Elementor).
        // 3. wp_footer          — secondary schema some Rank Math versions inject in the footer.
        $rank_math = new Schema_AI_Rank_Math();
        $this->loader->add_filter( 'rank_math/json_ld', $rank_math, 'filter_rank_math_schema', PHP_INT_MAX, 2 );
        $this->loader->add_filter( 'the_content', $rank_math, 'suppress_content_schema', PHP_INT_MAX );
        $this->loader->add_action( 'wp_footer', $rank_math, 'start_footer_buffer', 1 );
        $this->loader->add_action( 'wp_footer', $rank_math, 'flush_footer_buffer', PHP_INT_MAX );

        // AIOSEO: suppress all schema output.
        $this->loader->add_filter( 'aioseo_schema_output', '__return_empty_array', PHP_INT_MAX );

        // ACF integration.
        $acf = new Schema_AI_ACF();
        $this->loader->add_action( 'acf/init', $acf, 'init' );
    }

    /**
     * Run the loader to execute all hooks.
     */
    public function run() {
        $this->loader->run();
    }

    /**
     * The name of the plugin.
     *
     * @return string
     */
    public function get_plugin_name() {
        return $this->plugin_name;
    }

    /**
     * The reference to the loader class.
     *
     * @return Schema_AI_Loader
     */
    public function get_loader() {
        return $this->loader;
    }

    /**
     * Retrieve the version number of the plugin.
     *
     * @return string
     */
    public function get_version() {
        return $this->version;
    }

    /**
     * Validate any schemas stuck in "pending" status.
     *
     * Runs once via an option flag, then skips on subsequent page loads.
     */
    public function maybe_validate_pending_schemas() {
        $migrated = get_option( 'schema_ai_pending_migrated', false );
        if ( $migrated ) {
            return;
        }

        global $wpdb;
        $table = esc_sql( $wpdb->prefix . 'schema_ai_schemas' );

        // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- Required for custom table; no WP API alternative exists.
        $pending = $wpdb->get_results(
            $wpdb->prepare(
                // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- Table name is sanitized via esc_sql() and not user input.
                "SELECT id, schema_data FROM {$table} WHERE validation_status = %s LIMIT 100",
                'pending'
            )
        );

        if ( $pending ) {
            foreach ( $pending as $row ) {
                $schema = json_decode( $row->schema_data, true );
                $status = 'invalid';

                if ( is_array( $schema ) && ! empty( $schema['@type'] ) ) {
                    $has_context = ! empty( $schema['@context'] );
                    $has_name    = ! empty( $schema['name'] ) || ! empty( $schema['headline'] );

                    if ( $has_context && $has_name ) {
                        $status = 'valid';
                    } elseif ( $has_context || $has_name ) {
                        $status = 'warning';
                    }
                }

                // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching -- Required for custom table; write operation (UPDATE), caching not applicable.
                $wpdb->update(
                    $table,
                    array( 'validation_status' => $status ),
                    array( 'id' => $row->id ),
                    array( '%s' ),
                    array( '%d' )
                );
            }
        }

        update_option( 'schema_ai_pending_migrated', true );
    }
}