<?php
/**
 * Core plugin class – wires together all components.
 *
 * @package AI_Chatbot\Includes
 */

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

require_once AI_CHATBOT_PATH . 'includes/class-ai-chatbot-loader.php';
require_once AI_CHATBOT_PATH . 'includes/class-ai-chatbot-i18n.php';
require_once AI_CHATBOT_PATH . 'includes/class-ai-chatbot-api.php';
require_once AI_CHATBOT_PATH . 'admin/class-ai-chatbot-admin.php';

/**
 * Main plugin orchestrator.
 */
class Ai_Chatbot {

	/** @var Ai_Chatbot_Loader */
	protected $loader;

	/** @var string Plugin version. */
	protected $version;

	public function __construct() {
		$this->version = AI_CHATBOT_VERSION;
		$this->loader  = new Ai_Chatbot_Loader();

		$this->set_locale();
		$this->define_admin_hooks();
	}

	// -----------------------------------------------------------------------
	// Setup
	// -----------------------------------------------------------------------

	private function set_locale() {
		$i18n = new Ai_Chatbot_i18n();
		$this->loader->add_action( 'plugins_loaded', $i18n, 'load_plugin_textdomain' );
	}

	private function define_admin_hooks() {
		$admin = new Ai_Chatbot_Admin( $this->version );

		$this->loader->add_action( 'admin_enqueue_scripts', $admin, 'enqueue_styles' );
		$this->loader->add_action( 'admin_enqueue_scripts', $admin, 'enqueue_scripts' );
		$this->loader->add_action( 'admin_menu', $admin, 'register_menu' );

		// AJAX handlers.
		$this->loader->add_action( 'wp_ajax_ai_chatbot_signup',       $admin, 'ajax_signup' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_login',        $admin, 'ajax_login' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_otp_init',     $admin, 'ajax_otp_init' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_otp_verify',   $admin, 'ajax_otp_verify' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_logout',       $admin, 'ajax_logout' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_create_agent', $admin, 'ajax_create_agent' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_update_agent', $admin, 'ajax_update_agent' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_delete_agent', $admin, 'ajax_delete_agent' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_stats',    $admin, 'ajax_get_stats' );

		// Phase 2 – Agent Management.
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_appearance',       $admin, 'ajax_get_appearance' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_update_appearance',     $admin, 'ajax_update_appearance' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_ai_settings',       $admin, 'ajax_get_ai_settings' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_update_ai_settings',    $admin, 'ajax_update_ai_settings' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_kb',                $admin, 'ajax_get_kb' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_link_content',          $admin, 'ajax_link_content' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_delink_content',        $admin, 'ajax_delink_content' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_toggle_frontend_embed', $admin, 'ajax_toggle_frontend_embed' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_site_content',       $admin, 'ajax_get_site_content' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_link_wp_post',           $admin, 'ajax_link_wp_post' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_inbox_sessions',     $admin, 'ajax_get_inbox_sessions' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_inbox_chats',        $admin, 'ajax_get_inbox_chats' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_account_limits',     $admin, 'ajax_get_account_limits' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_crawl_website',          $admin, 'ajax_crawl_website' );

		// Auto-refresh KB when a linked post/product is saved.
		// Priority 99 ensures WooCommerce has finished saving product meta (priority 34)
		// before we read price, SKU, and other product-specific fields.
		$this->loader->add_action( 'save_post', $admin, 'on_post_saved', 99, 3 );

		// Widget Tabs (Tab Integrations).
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_widget_tabs',  $admin, 'ajax_get_widget_tabs' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_save_widget_tabs', $admin, 'ajax_save_widget_tabs' );

		// WooCommerce Integration.
		$this->loader->add_action( 'wp_ajax_ai_chatbot_get_woocommerce_status', $admin, 'ajax_get_woocommerce_status' );
		$this->loader->add_action( 'wp_ajax_ai_chatbot_toggle_woocommerce',     $admin, 'ajax_toggle_woocommerce' );
	}

	private function define_public_hooks() {
		// Inject the embed script into the frontend footer when an agent is enabled.
		$this->loader->add_action( 'wp_footer',          $this, 'inject_frontend_embed' );
		// Enqueue the WooCommerce cart bridge when an embed is active and WC is installed.
		$this->loader->add_action( 'wp_enqueue_scripts', $this, 'enqueue_public_scripts' );
	}

	/**
	 * Enqueue the WooCommerce postMessage cart bridge on the frontend.
	 *
	 * The bridge runs on the WordPress parent page (same origin as WooCommerce)
	 * and forwards cart API calls from the cross-origin chatbot iframe, supplying
	 * the WC Store API nonce and session cookies that are inaccessible from inside
	 * the iframe.
	 *
	 * Only loaded when:
	 *  - An agent embed is configured (chatbot_id present in option).
	 *  - WooCommerce is active.
	 */
	public function enqueue_public_scripts() {
		$embed = get_option( PLUGIN_SLUG . '_frontend_embed' );
		if ( empty( $embed['chatbot_id'] ) || ! class_exists( 'WooCommerce' ) ) {
			return;
		}

		wp_enqueue_script(
			'ai-chatbot-cart-bridge',
			AI_CHATBOT_URL . 'assets/ai-chatbot-cart-bridge.js',
			array(),           // no dependencies
			AI_CHATBOT_VERSION,
			true               // load in footer
		);

		wp_localize_script(
			'ai-chatbot-cart-bridge',
			'aiChatbotWooBridge',
			array(
				'storeApiUrl'  => esc_url( get_rest_url( null, 'wc/store/v1' ) ),
				'nonce'        => wp_create_nonce( 'wc_store_api' ),
				'iframeOrigin' => rtrim( PLUGIN_PLAYGROUND_BASE_URL, '/' ),
			)
		);
	}

	/**
	 * Output the chatbot embed script in the site footer when an agent is enabled.
	 * Runs on wp_footer – no admin check needed; wp_footer only fires on the frontend.
	 */
	public function inject_frontend_embed() {
		$embed = get_option( PLUGIN_SLUG . '_frontend_embed' );
		if ( empty( $embed['chatbot_id'] ) || empty( $embed['project_id'] ) ) {
			return;
		}

		$base = rtrim( PLUGIN_PLAYGROUND_BASE_URL, '/' );
		$pid  = esc_js( $embed['project_id'] );
		$cid  = esc_js( $embed['chatbot_id'] );
		?>
		<script>
		(function () {
			var s = document.createElement('script');
			s.src = '<?php echo esc_js( $base ); ?>/embed/agent-widget.js?v=' + Date.now();
			s.setAttribute('data-pid', '<?php echo $pid; // phpcs:ignore -- already esc_js ?>');
			s.setAttribute('data-cid', '<?php echo $cid; // phpcs:ignore -- already esc_js ?>');
			document.body.appendChild(s);
		})();
		</script>
		<?php
	}

	public function run() {
		$this->define_public_hooks();
		$this->loader->run();
	}
}