<?php
/**
 * The cron task class.
 *
 * @since      	1.1.3
 * @since  		1.5 Moved into /inc
 */
namespace LiteSpeed;

defined( 'WPINC' ) || exit;

class Task extends Instance {
	protected static $_instance;

	private static $_triggers = array(
		Base::O_IMG_OPTM_CRON			 		=> array( 'name' => 'litespeed_task_imgoptm_pull', 'hook' => 'LiteSpeed\Img_Optm::cron_pull' ), // always fetch immediately
		Base::O_OPTM_CCSS_ASYNC			 		=> array( 'name' => 'litespeed_task_ccss', 'hook' => 'LiteSpeed\CSS::cron_ccss' ),
		Base::O_MEDIA_PLACEHOLDER_RESP_ASYNC	=> array( 'name' => 'litespeed_task_lqip', 'hook' => 'LiteSpeed\Placeholder::cron' ),
		Base::O_DISCUSS_AVATAR_CRON				=> array( 'name' => 'litespeed_task_avatar', 'hook' => 'LiteSpeed\Avatar::cron' ),
		Base::O_IMG_OPTM_AUTO				 	=> array( 'name' => 'litespeed_task_imgoptm_req', 'hook' => 'LiteSpeed\Img_Optm::cron_auto_request' ),
		Base::O_CRAWLER 						=> array( 'name' => 'litespeed_task_crawler', 'hook' => 'LiteSpeed\Crawler::start' ), // Set crawler to last one to use above results
	);

	const FITLER_CRAWLER = 'litespeed_crawl_filter';
	const FITLER = 'litespeed_filter';

	/**
	 * Init
	 *
	 * @since  1.6
	 * @access protected
	 */
	protected function __construct() {
	}

	/**
	 * Keep all tasks in cron
	 *
	 * @since 3.0
	 * @access public
	 */
	public function init() {
		Debug2::debug2( '⏰ Task init' );

		add_filter( 'cron_schedules', array( $this, 'lscache_cron_filter' ) );

		foreach ( self::$_triggers as $id => $trigger ) {
			if ( Conf::val( $id ) ) {
				// Special check for crawler
				if ( $id == Base::O_CRAWLER ) {
					if ( ! Router::can_crawl() ) {
						continue;
					}

					add_filter( 'cron_schedules', array( $this, 'lscache_cron_filter_crawler' ) );
				}

				if( ! wp_next_scheduled( $trigger[ 'name' ] ) ) {
					Debug2::debug( '⏰ Cron hook register [name] ' . $trigger[ 'name' ] );

					wp_schedule_event( time(), $id == Base::O_CRAWLER ? self::FITLER_CRAWLER : self::FITLER, $trigger[ 'name' ] );
				}

				add_action( $trigger[ 'name' ], $trigger[ 'hook' ] );
			}
		}

	}

	/**
	 * Clean all potential existing crons
	 *
	 * @since 3.0
	 * @access public
	 */
	public static function destroy() {
		Utility::compatibility();
		array_map( 'wp_clear_scheduled_hook', array_column( self::$_triggers, 'name' ) );
	}

	/**
	 * Try to clean the crons if disabled
	 *
	 * @since 3.0
	 * @access public
	 */
	public static function try_clean( $id ) {
		// Clean v2's leftover cron ( will remove in v3.1 )
		// foreach ( wp_get_ready_cron_jobs() as $hooks ) {
		// 	foreach ( $hooks as $hook => $v ) {
		// 		if ( strpos( $hook, 'litespeed_' ) === 0 && ( substr( $hook, -8 ) === '_trigger' || strpos( $hook, 'litespeed_task_' ) !== 0 ) ) {
		// 			Debug2::debug( '⏰ Cron clear legacy [hook] ' . $hook );
		// 			wp_clear_scheduled_hook( $hook );
		// 		}
		// 	}
		// }

		if ( $id && ! empty( self::$_triggers[ $id ] ) ) {
			if ( ! Conf::val( $id ) || ( $id == Base::O_CRAWLER && ! Router::can_crawl() ) ) {
				Debug2::debug( '⏰ Cron clear [id] ' . $id . ' [hook] ' . self::$_triggers[ $id ][ 'name' ] );
				wp_clear_scheduled_hook( self::$_triggers[ $id ][ 'name' ] );
			}
			return;
		}

		Debug2::debug( '⏰ ❌ Unknown cron [id] ' . $id );
	}

	/**
	 * Register cron interval imgoptm
	 *
	 * @since 1.6.1
	 * @access public
	 */
	public function lscache_cron_filter( $schedules ) {
		if ( ! array_key_exists( self::FITLER, $schedules ) ) {
			$schedules[ self::FITLER ] = array(
				'interval' => 60,
				'display'  => __( 'Every Minute', 'litespeed-cache' ),
			);
		}
		return $schedules;
	}

	/**
	 * Register cron interval
	 *
	 * @since 1.1.0
	 * @access public
	 */
	public function lscache_cron_filter_crawler( $schedules ) {
		$interval = Conf::val( Base::O_CRAWLER_RUN_INTERVAL );
		// $wp_schedules = wp_get_schedules();
		if ( ! array_key_exists( self::FITLER_CRAWLER, $schedules ) ) {
			// 	Debug2::debug('Crawler cron log: cron filter '.$interval.' added');
			$schedules[ self::FITLER_CRAWLER ] = array(
				'interval' => $interval,
				'display'  => __( 'LiteSpeed Crawler Cron', 'litespeed-cache' ),
			);
		}
		return $schedules;
	}

}