<?php
/**
 * The background check: every five minutes, the videos still under way or not
 * yet saved, for sites Ojelio cannot call and for messages that went astray.
 *
 * @package Ojelio
 */

namespace Ojelio;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

final class Cron {

	const EVENT    = 'ojelio_check_videos';
	const SCHEDULE = 'ojelio_five_minutes';

	public static function boot() {
		add_filter( 'cron_schedules', array( __CLASS__, 'schedules' ) ); // phpcs:ignore WordPress.WP.CronInterval.CronSchedulesInterval -- five minutes is the point.
		add_action( self::EVENT, array( __CLASS__, 'check' ) );
		add_action( 'init', array( __CLASS__, 'keep_scheduled' ) );
		register_deactivation_hook( OJELIO_FILE, array( __CLASS__, 'unschedule' ) );
	}

	public static function schedules( $schedules ) {
		$schedules[ self::SCHEDULE ] = array(
			'interval' => 5 * MINUTE_IN_SECONDS,
			'display'  => __( 'Every five minutes (Ojelio)', 'ojelio' ),
		);
		return $schedules;
	}

	/** Scheduled while the site is connected, and not otherwise. */
	public static function keep_scheduled() {
		$scheduled = wp_next_scheduled( self::EVENT );
		if ( Connection::get() && ! $scheduled ) {
			wp_schedule_event( time() + MINUTE_IN_SECONDS, self::SCHEDULE, self::EVENT );
		} elseif ( ! Connection::get() && $scheduled ) {
			self::unschedule();
		}
	}

	public static function unschedule() {
		wp_clear_scheduled_hook( self::EVENT );
	}

	public static function check() {
		foreach ( Videos::pending_posts() as $post_id ) {
			// Asked about at most once a minute each; the editor asks more often while it is open.
			foreach ( Videos::refresh( $post_id, MINUTE_IN_SECONDS ) as $video ) {
				if ( 'completed' === $video['status'] && Videos::needs_work( $video ) ) {
					Media::schedule( $post_id, $video['id'] );
				}
			}
		}
	}
}