<?php
/**
 * Plugin bootstrap.
 *
 * @package Recast\WCS
 */

namespace Recast\WCS;

defined( 'ABSPATH' ) || exit;

/**
 * Wires the plugin together once WordPress, WooCommerce and WooCommerce Subscriptions are loaded.
 */
final class Plugin {

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

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

	/**
	 * Operation registry.
	 *
	 * @var Operation\OperationRegistry|null
	 */
	private $operations = null;

	/**
	 * The operation registry (built lazily, extensible via recast_register_operations).
	 *
	 * @return Operation\OperationRegistry
	 */
	public function operations() {
		if ( null === $this->operations ) {
			$this->operations = new Operation\OperationRegistry();
			$this->operations->register( new Operation\NoopOperation() );
			$this->operations->register( new Operation\Price\SetPriceOperation() );
			$this->operations->register( new Operation\Price\AdjustPriceOperation() );
			$this->operations->register( new Operation\Product\MoveProductOperation() );
			$this->operations->register( new Operation\Journal\RestoreSnapshotOperation() );
			$this->operations->register( new Operation\Schedule\NextPaymentOperation() );
			$this->operations->register( new Operation\Schedule\TrialEndOperation() );
			$this->operations->register( new Operation\Schedule\EndDateOperation() );
			$this->operations->register( new Operation\Field\BillingScheduleOperation() );
			$this->operations->register( new Operation\Field\StatusOperation() );
			$this->operations->register( new Operation\Field\ManualRenewalOperation() );
			$this->operations->register( new Operation\Field\PaymentMethodOperation() );
			$this->operations->register( new Operation\Field\TaxClassOperation() );
			$this->operations->register( new Operation\Field\MetaOperation() );
			/**
			 * Lets extensions register operations.
			 *
			 * @param Operation\OperationRegistry $registry Registry.
			 */
			do_action( 'recast_register_operations', $this->operations );
		}
		return $this->operations;
	}

	/**
	 * Entry point hooked to plugins_loaded.
	 *
	 * @return void
	 */
	public static function boot() {
		self::instance()->run();
	}

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

	/**
	 * Whether the plugin booted (requirements met).
	 *
	 * @return bool
	 */
	public function is_booted() {
		return $this->booted;
	}

	/**
	 * Performs the boot sequence.
	 *
	 * @return void
	 */
	private function run() {
		if ( $this->booted ) {
			return;
		}

		Support\I18n::register();
		$requirements = new Requirements();
		if ( ! $requirements->are_met() ) {
			$requirements->handle_unmet();
			return;
		}

		$this->booted = true;

		add_action( 'admin_init', array( Install\Installer::class, 'maybe_upgrade' ) );
		Capabilities::register();
		if ( class_exists( Premium\Bootstrap::class ) ) {
			Premium\Bootstrap::register();
		}
		Admin\Menu::register();
		Admin\Assets::register();
		Rest\Router::register();
		add_action( Pipeline\Scheduler::HOOK_COUNT_COHORT, array( Cohort\Counter::class, 'run_background' ) );
		Health\Scanner::register();
		Pipeline\ResolveJob::register();
		Pipeline\PreviewJob::register();
		Pipeline\Watchdog::register();
		Pipeline\Cleanup::register();
		Export\BackgroundExporter::register();
		Export\DownloadHandler::register();
		Export\Cleanup::register();
		Journal\Retention::register();
		Admin\HistoryMetaBox::register();
		Cli\RunCommand::register();
		Cli\SeedCommand::register();

		/**
		 * Fires once Recast has verified its requirements and is ready to register components.
		 *
		 * @param Plugin $plugin The plugin instance.
		 */
		do_action( 'recast_loaded', $this );
	}
}