<?php
/**
 * Main plugin controller.
 *
 * @package AgentReadyForWooCommerce
 */

defined( 'ABSPATH' ) || exit;

/**
 * Class ARWC_Plugin
 *
 * Singleton that wires together the audit engine, scanner, the (active) fixer
 * module, and the admin UI. Acts as a small service container so later versions
 * can resolve the scorer/scanner/fixer without globals. (Order tracking under
 * modules/ remains a V2 seam.)
 */
final class ARWC_Plugin {

	/**
	 * Singleton instance.
	 *
	 * @var ARWC_Plugin|null
	 */
	private static $instance = null;

	/**
	 * Scoring engine.
	 *
	 * @var ARWC_Scorer
	 */
	private $scorer;

	/**
	 * Catalog scanner.
	 *
	 * @var ARWC_Scanner
	 */
	private $scanner;

	/**
	 * Free/Pro license gate.
	 *
	 * @var ARWC_License
	 */
	private $license;

	/**
	 * Fixer module.
	 *
	 * @var ARWC_Fixer
	 */
	private $fixer;

	/**
	 * Agent-order tracking module.
	 *
	 * @var ARWC_Order_Tracking
	 */
	private $order_tracking;

	/**
	 * Get the singleton instance.
	 *
	 * @return ARWC_Plugin
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	/**
	 * Constructor. Loads dependencies and registers hooks.
	 */
	private function __construct() {
		$this->includes();
		$this->init();
	}

	/**
	 * Load class files.
	 *
	 * @return void
	 */
	private function includes() {
		// Core / gating.
		require_once ARWC_PLUGIN_DIR . 'includes/class-arwc-license.php';

		// Scoring engine.
		require_once ARWC_PLUGIN_DIR . 'includes/interface-arwc-check.php';
		require_once ARWC_PLUGIN_DIR . 'includes/class-arwc-check-result.php';
		require_once ARWC_PLUGIN_DIR . 'includes/abstract-arwc-check.php';
		require_once ARWC_PLUGIN_DIR . 'includes/class-arwc-scorer.php';
		require_once ARWC_PLUGIN_DIR . 'includes/class-arwc-scanner.php';

		// Individual checks.
		require_once ARWC_PLUGIN_DIR . 'includes/checks/class-arwc-check-schema.php';
		require_once ARWC_PLUGIN_DIR . 'includes/checks/class-arwc-check-attributes.php';
		require_once ARWC_PLUGIN_DIR . 'includes/checks/class-arwc-check-identifiers.php';
		require_once ARWC_PLUGIN_DIR . 'includes/checks/class-arwc-check-description.php';
		require_once ARWC_PLUGIN_DIR . 'includes/checks/class-arwc-check-inventory.php';

		// Fixer module: the write-side counterpart to the audit.
		require_once ARWC_PLUGIN_DIR . 'modules/class-arwc-openrouter.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/interface-arwc-fix.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-result.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/abstract-arwc-fix.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-schema.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-content.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-attributes.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-identifiers.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-description-ai.php';
		require_once ARWC_PLUGIN_DIR . 'modules/fixes/class-arwc-fix-attributes-ai.php';
		require_once ARWC_PLUGIN_DIR . 'modules/class-arwc-fixer.php';

		// Site-level agent access (AI-crawler robots rules + product-aware llms.txt).
		require_once ARWC_PLUGIN_DIR . 'modules/class-arwc-agent-access.php';

		// V2 extension-point stub (still a seam; not wired to UI yet).
		require_once ARWC_PLUGIN_DIR . 'modules/class-arwc-order-tracking.php';

		// Admin UI.
		if ( is_admin() ) {
			require_once ARWC_PLUGIN_DIR . 'admin/class-arwc-admin.php';
			require_once ARWC_PLUGIN_DIR . 'admin/class-arwc-review-notice.php';
			require_once ARWC_PLUGIN_DIR . 'admin/class-arwc-onboarding.php';
			require_once ARWC_PLUGIN_DIR . 'admin/class-arwc-product-metabox.php';
			require_once ARWC_PLUGIN_DIR . 'admin/class-arwc-product-column.php';
		}
	}

	/**
	 * Instantiate services and register hooks.
	 *
	 * @return void
	 */
	private function init() {
		$this->license = new ARWC_License();
		$this->scorer  = new ARWC_Scorer( $this->license );
		$this->scanner = new ARWC_Scanner( $this->scorer );

		// Boot the fixer and the agent-order tracking module.
		$this->fixer          = ARWC_Fixer::instance( $this->license );
		$this->order_tracking = ARWC_Order_Tracking::instance( $this->license );

		// Boot site-level agent access (front-end robots.txt + /llms.txt).
		ARWC_Agent_Access::instance( $this->license );

		if ( is_admin() ) {
			new ARWC_Admin( $this->scanner, $this->scorer, $this->license, $this->fixer, $this->order_tracking );
			new ARWC_Review_Notice();

			// First-run setup wizard + the per-product agent-readiness meta box +
			// the score column on the Products list table.
			new ARWC_Onboarding();
			new ARWC_Product_Metabox( $this->scorer, $this->scanner );
			new ARWC_Product_Column( $this->scorer );
		}

		// Translations for plugins hosted on WordPress.org are loaded
		// automatically since WordPress 4.6, so no load_plugin_textdomain() call
		// is needed here.
	}

	/**
	 * Accessor for the scorer.
	 *
	 * @return ARWC_Scorer
	 */
	public function scorer() {
		return $this->scorer;
	}

	/**
	 * Accessor for the scanner.
	 *
	 * @return ARWC_Scanner
	 */
	public function scanner() {
		return $this->scanner;
	}

	/**
	 * Accessor for the license gate.
	 *
	 * @return ARWC_License
	 */
	public function license() {
		return $this->license;
	}

	/**
	 * Accessor for the fixer.
	 *
	 * @return ARWC_Fixer
	 */
	public function fixer() {
		return $this->fixer;
	}

	/**
	 * Accessor for the agent-order tracking module.
	 *
	 * @return ARWC_Order_Tracking
	 */
	public function order_tracking() {
		return $this->order_tracking;
	}
}