<?php
/**
 * Plugin loader.
 *
 * @package PingPush
 */

defined( 'ABSPATH' ) || exit;

/**
 * Boots the plugin and loads integrations for active plugins only.
 */
final class PingPush {

	/**
	 * Instance.
	 *
	 * @var PingPush|null
	 */
	private static $instance = null;

	/**
	 * Loaded integrations.
	 *
	 * @var PingPush_Integration[]
	 */
	private $integrations = array();

	/**
	 * Supported integrations whose plugin is not active: class => name.
	 *
	 * @var array<string,string>
	 */
	private $inactive = array();

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

	/**
	 * Constructor.
	 */
	private function __construct() {
		PingPush_Logger::maybe_install();
		PingPush_Queue::init();

		// Event labels are translated, so register them on init (WordPress 6.7+ warns about
		// translations loaded earlier). Priority 1 keeps us ahead of plugins acting on init.
		add_action( 'init', array( $this, 'boot_events' ), 1 );

		if ( is_admin() ) {
			new PingPush_Settings();
			new PingPush_Importer();
		}
	}

	/**
	 * Load integrations and register events.
	 */
	public function boot_events() {
		$this->load_integrations();

		/**
		 * Register custom events with PingPush_Events::register() and trigger them
		 * with PingPush_Events::trigger().
		 */
		do_action( 'pingpush_register_events' );
	}

	/**
	 * Integration classes, keyed by file.
	 *
	 * @return array<string,string>
	 */
	private function integration_map() {
		return array(
			'class-pingpush-event-core.php'            => 'PingPush_Event_Core',
			'class-pingpush-event-cf7.php'             => 'PingPush_Event_CF7',
			'class-pingpush-event-wpforms.php'         => 'PingPush_Event_WPForms',
			'class-pingpush-event-gravityforms.php'    => 'PingPush_Event_GravityForms',
			'class-pingpush-event-fluentforms.php'     => 'PingPush_Event_FluentForms',
			'class-pingpush-event-elementor-forms.php' => 'PingPush_Event_Elementor_Forms',
			'class-pingpush-event-ninjaforms.php'      => 'PingPush_Event_NinjaForms',
			'class-pingpush-event-forminator.php'      => 'PingPush_Event_Forminator',
			'class-pingpush-event-formidable.php'      => 'PingPush_Event_Formidable',
			'class-pingpush-event-woocommerce.php'     => 'PingPush_Event_WooCommerce',
			'class-pingpush-event-edd.php'             => 'PingPush_Event_EDD',
			'class-pingpush-event-custom-hook.php'     => 'PingPush_Event_Custom_Hook',
		);
	}

	/**
	 * Load integrations.
	 */
	private function load_integrations() {
		require_once PINGPUSH_DIR . 'includes/events/class-pingpush-integration.php';
		require_once PINGPUSH_DIR . 'includes/events/class-pingpush-form-integration.php';

		foreach ( $this->integration_map() as $file => $class ) {
			require_once PINGPUSH_DIR . 'includes/events/' . $file;
			if ( ! class_exists( $class ) ) {
				continue;
			}
			if ( ! $class::is_available() ) {
				$this->inactive[ $class ] = $class::name();
				continue;
			}
			$integration = new $class();
			$integration->register_events();
			$integration->hooks();
			$this->integrations[ $class ] = $integration;
		}
	}

	/**
	 * Names of supported plugins that are not active.
	 *
	 * @return string[]
	 */
	public function inactive_integrations() {
		return array_values( $this->inactive );
	}

	/**
	 * Activation.
	 */
	public static function activate() {
		PingPush_Logger::install();
		add_option( PINGPUSH_OPTION, PingPush_Settings::defaults(), '', false );
		if ( ! wp_next_scheduled( 'pingpush_check_updates' ) ) {
			wp_schedule_event( time() + HOUR_IN_SECONDS, 'twicedaily', 'pingpush_check_updates' );
		}
	}

	/**
	 * Deactivation.
	 */
	public static function deactivate() {
		wp_clear_scheduled_hook( 'pingpush_check_updates' );
		wp_unschedule_hook( PingPush_Queue::HOOK );
		if ( function_exists( 'as_unschedule_all_actions' ) ) {
			as_unschedule_all_actions( PingPush_Queue::HOOK, array(), PingPush_Queue::GROUP );
		}
	}
}