<?php


namespace Snowflake\Crontab;


use Exception;
use Snowflake\Abstracts\Component;
use Snowflake\Snowflake;


/**
 * Class Producer
 * @package Snowflake\Abstracts
 */
class Producer extends Component
{

	const CRONTAB_KEY = '_application:system:crontab';


	/**
	 * @param Crontab $crontab
	 * @throws Exception
	 */
	public function dispatch(Crontab $crontab)
	{
		$redis = Snowflake::app()->getRedis();

		$name = $crontab->getName();

		if (
			$redis->exists(self::CRONTAB_KEY) &&
			$redis->type(self::CRONTAB_KEY) !== \Redis::REDIS_ZSET) {
			throw new Exception('Cache key ' . self::CRONTAB_KEY . ' types error.');
		}

		$tickTime = time() + $crontab->getTickTime();

		$result = $redis->zAdd(self::CRONTAB_KEY, $tickTime, $name);
		if ($result) {
			$redis->set('crontab:' . $name, swoole_serialize($crontab));
		}
	}


	/**
	 * @param string $name
	 * @throws Exception
	 */
	public function clear(string $name)
	{
		$redis = Snowflake::app()->getRedis();

		$redis->zRem(self::CRONTAB_KEY, $name);
		$redis->del('crontab:' . md5($name));
	}


	/**
	 * @throws Exception
	 */
	public function clearAll()
	{
		$redis = Snowflake::app()->getRedis();
		$data = $redis->zRange(self::CRONTAB_KEY, 0, -1);
		$redis->del(self::CRONTAB_KEY);
		foreach ($data as $datum) {
			$redis->del('crontab:' . $datum);
		}
		$redis->release();
	}


}