<?php

namespace Kiri\Cache\Base;

use Http\Context\Context;
use Kiri\Events\EventProvider;
use Kiri\Exception\RedisConnectException;
use Kiri\Kiri;
use Kiri\Pool\StopHeartbeatCheck;
use Server\Events\OnWorkerExit;
use Swoole\Timer;


/**
 *
 */
class Redis implements StopHeartbeatCheck
{

	const DB_ERROR_MESSAGE = 'The system is busy, please try again later.';


	private ?\Redis $pdo = null;


	private int $_transaction = 0;


	/**
	 * @var EventProvider
	 */
	private EventProvider $eventProvider;

	private int $_timer = -1;

	private int $_last = 0;


	/**
	 * @param string $host
	 * @param int $port
	 * @param int $database
	 * @param string $auth
	 * @param string $prefix
	 * @param int $timeout
	 * @param int $read_timeout
	 * @throws \ReflectionException
	 */
	public function __construct(public string $host, public int $port, public int $database = 0,
	                            public string $auth = '', public string $prefix = '', public int $timeout = 30,
	                            public int    $read_timeout = 30)
	{
		$this->eventProvider = Kiri::getDi()->get(EventProvider::class);
	}


	public function init()
	{
		$this->heartbeat_check();
		$this->eventProvider->on(OnWorkerExit::class, [$this, 'stopHeartbeatCheck']);
	}


	/**
	 *
	 */
	public function heartbeat_check(): void
	{
		if (env('state') == 'exit') {
			return;
		}
		if ($this->_timer === -1 && Context::inCoroutine()) {
			$this->_timer = Timer::tick(1000, function () {
				try {
					if (env('state') == 'exit') {
						echo 'timer end.' . PHP_EOL;
					}
					if (time() - $this->_last > 10 * 60) {
						$this->stopHeartbeatCheck();
						$this->pdo = null;
					}
				} catch (\Throwable $throwable) {
					error($throwable);
				}
			});
		}
	}


	/**
	 *
	 */
	public function stopHeartbeatCheck(): void
	{
		if ($this->_timer > -1) {
			Timer::clear($this->_timer);
		}
		$this->_timer = -1;
	}


	/**
	 * @param string $name
	 * @param array $arguments
	 * @return mixed
	 * @throws RedisConnectException
	 */
	public function __call(string $name, array $arguments)
	{
		if (!method_exists($this, $name)) {
			return $this->_pdo()->{$name}(...$arguments);
		}
		return $this->{$name}(...$arguments);
	}


	/**
	 * @return \Redis
	 * @throws RedisConnectException
	 */
	public function _pdo(): \Redis
	{
		if ($this->_timer === -1) {
			$this->heartbeat_check();
		}
		if (!($this->pdo instanceof \Redis)) {
			$this->pdo = $this->newClient();
		}
		return $this->pdo;
	}


	/**
	 * @return \Redis
	 * @throws RedisConnectException
	 */
	private function newClient(): \Redis
	{
		$redis = new \Redis();
		if (!$redis->pconnect($this->host, $this->port, $this->timeout)) {
			throw new RedisConnectException(sprintf('The Redis Connect %s::%d Fail.', $this->host, $this->port));
		}
		if (!empty($config['auth']) && !$redis->auth($config['auth'])) {
			throw new RedisConnectException(sprintf('Redis Error: %s, Host %s, Auth %s', $redis->getLastError(), $this->host, $this->auth));
		}
		if ($this->read_timeout < 0) {
			$this->read_timeout = 0;
		}
		$redis->select($this->database);
		$redis->setOption(\Redis::OPT_READ_TIMEOUT, $this->read_timeout);
		$redis->setOption(\Redis::OPT_PREFIX, $this->prefix);
		return $redis;

	}

}