<?php
/**
 * Plugin bootstrap singleton.
 *
 * @package Kayvandra\MarginBeacon
 */

declare(strict_types=1);

namespace Kayvandra\MarginBeacon;

use Kayvandra\MarginBeacon\Admin\Acknowledgement\AcknowledgementActions;
use Kayvandra\MarginBeacon\Admin\Audit\PreflightPage;
use Kayvandra\MarginBeacon\Admin\Cost\CogsMigrationPage;
use Kayvandra\MarginBeacon\Admin\Cost\CogsSourceNotices;
use Kayvandra\MarginBeacon\Admin\Cost\CostSourceAdminUi;
use Kayvandra\MarginBeacon\Admin\Cost\CogsWizardPage;
use Kayvandra\MarginBeacon\Admin\Cost\ProductCostFields;
use Kayvandra\MarginBeacon\Admin\Dashboard\OverviewPage;
use Kayvandra\MarginBeacon\Admin\Navigation\AdminApp;
use Kayvandra\MarginBeacon\Admin\License\ProUpgradeCta;
use Kayvandra\MarginBeacon\Admin\Navigation\Menu;
use Kayvandra\MarginBeacon\Admin\Notices\AdminNotices;
use Kayvandra\MarginBeacon\Admin\Orders\OrderDetailPanel;
use Kayvandra\MarginBeacon\Admin\Orders\OrderListColumn;
use Kayvandra\MarginBeacon\Admin\Orders\OrderRiskRetryActions;
use Kayvandra\MarginBeacon\Admin\Privacy\PrivacyPolicy;
use Kayvandra\MarginBeacon\Admin\Products\ProductBulkCostEdit;
use Kayvandra\MarginBeacon\Admin\Products\ProductListCostColumn;
use Kayvandra\MarginBeacon\Admin\Settings\SettingsPage;
use Kayvandra\MarginBeacon\Application\Cost\CanonicalCostSource;
use Kayvandra\MarginBeacon\Application\Entitlement\EntitlementService;
use Kayvandra\MarginBeacon\Application\Freshness\StalenessObserver;
use Kayvandra\MarginBeacon\Application\Health\HealthService;
use Kayvandra\MarginBeacon\Application\OrderRisk\OrderRiskEnqueueService;
use Kayvandra\MarginBeacon\Application\Provenance\PriceRevisionObserver;
use Kayvandra\MarginBeacon\Bootstrap\Hooks;
use Kayvandra\MarginBeacon\Infrastructure\Cli\CommandRegistrar;
use Kayvandra\MarginBeacon\Infrastructure\Scheduler\ActionSchedulerAdapter;
use Kayvandra\MarginBeacon\Infrastructure\Scheduler\SchedulerInterface;
use Kayvandra\MarginBeacon\Infrastructure\Woo\DependencyChecker;
use Kayvandra\MarginBeacon\Migrations\Migrator;
use Kayvandra\MarginBeacon\Support\DistributionChannel;

/**
 * Main plugin orchestrator.
 */
final class Plugin {

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

	/**
	 * Whether boot completed.
	 *
	 * @var bool
	 */
	private $booted = false;

	/**
	 * Whether runtime dependencies are met.
	 *
	 * @var bool
	 */
	private $ready = false;

	/**
	 * Scheduler adapter.
	 *
	 * @var SchedulerInterface|null
	 */
	private $scheduler = null;

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

		return self::$instance;
	}

	/**
	 * Boot the plugin after plugins_loaded.
	 *
	 * @return void
	 */
	public function boot() {
		if ( $this->booted ) {
			return;
		}
		$this->booted = true;

		$checker = new DependencyChecker();
		if ( ! $checker->meets_requirements() ) {
			AdminNotices::register_dependency_failures( $checker->failures() );
			return;
		}

		// Fail-closed: never mark ready until schema migrates and invariants hold.
		if ( ! ( new Migrator() )->maybe_upgrade() ) {
			AdminNotices::register_dependency_failures(
				array(
					__( 'MarginBeacon could not verify its database schema. Check database permissions, then deactivate and reactivate the plugin.', 'marginbeacon' ),
				)
			);
			return;
		}

		$this->ready = true;

		$this->scheduler = new ActionSchedulerAdapter();

		// Persist canonical COGS source for upgrades without rewriting merchant choice.
		( new CanonicalCostSource() )->ensure_bootstrapped( false );

		( new Hooks( $this ) )->register();
		( new Menu() )->register();
		( new AdminApp() )->register();
		( new OverviewPage() )->register();
		( new SettingsPage() )->register();
		( new CogsWizardPage() )->register();
		( new CogsMigrationPage() )->register();
		( new CogsSourceNotices() )->register();
		( new CostSourceAdminUi() )->register();
		( new ProductCostFields() )->register();
		( new ProductListCostColumn() )->register();
		( new ProductBulkCostEdit() )->register();
		( new PreflightPage() )->register();
		( new OrderListColumn() )->register();
		( new OrderDetailPanel() )->register();
		( new OrderRiskRetryActions() )->register();
		( new AcknowledgementActions() )->register();
		( new AdminNotices() )->register();
		if ( ! DistributionChannel::is_direct() ) {
			( new ProUpgradeCta() )->register();
		}
		( new PrivacyPolicy() )->register();
		( new OrderRiskEnqueueService( $this->scheduler ) )->register();
		( new PriceRevisionObserver() )->register();
		( new StalenessObserver() )->register();

		if ( defined( 'WP_CLI' ) && WP_CLI ) {
			CommandRegistrar::register( new HealthService( $this->scheduler ), $this->scheduler );
		}

		$this->declare_woo_feature_compatibility();

		/**
		 * Fires after the Free base plugin is fully ready.
		 *
		 * Pro companion must listen here (or plugins_loaded > 20) and must not
		 * own schema, menus, or scheduler groups.
		 *
		 * @param Plugin $plugin Base plugin instance.
		 */
		do_action( 'aksmb_loaded', $this );
	}

	/**
	 * Whether the plugin is fully operational.
	 *
	 * @return bool
	 */
	public function is_ready() {
		return $this->ready;
	}

	/**
	 * Scheduler instance.
	 *
	 * @return SchedulerInterface|null
	 */
	public function scheduler() {
		return $this->scheduler;
	}

	/**
	 * Entitlement service (Free base).
	 *
	 * @return EntitlementService
	 */
	public function entitlement() {
		return new EntitlementService();
	}

	/**
	 * Declare WooCommerce feature compatibility.
	 *
	 * @return void
	 */
	private function declare_woo_feature_compatibility() {
		add_action(
			'before_woocommerce_init',
			static function () {
				if ( class_exists( '\Automattic\WooCommerce\Utilities\FeaturesUtil' ) ) {
					\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility(
						'custom_order_tables',
						AKSMB_PLUGIN_FILE,
						true
					);
					\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility(
						'cart_checkout_blocks',
						AKSMB_PLUGIN_FILE,
						true
					);
				}
			}
		);
	}
}