<?php

namespace app\gateway\service;

use app\core\Service;

/**
 * Redis处理器
 * Class QueueService
 * @package app\gateway\service
 */
class RedisService
{
	private $redis;
    private $expire;

    /**
     * instance
     *
     * @var object
     */
    protected static $instance;

    /**
     * load
     *
     * @return CurlService
     */
    public static function getInstance($config = array())
    {
        if (!self::$instance) {
            self::$instance = new self($config);
        }
        
        return self::$instance;
    }

    public function __construct($config = array())
    {
        $this->redis = new \Redis;
        if (!$config) {
            $host = sysconf('redis_host');
            if (!$host) {
                $config['host'] = '127.0.0.1';
                $config['port'] = '6379';
                //$config['password'] = 'dm_redis_123';
            } else {
                $config['host'] = $host;
                $config['port'] = sysconf('redis_port');
                $password = sysconf('redis_password');
                if ($password) {
                    $config['password'] = $password;
                }
            }
            
        }
        $this->connect($config);
    }

	public function connect($config)
    {
        if (isset($config["host"])) {
            $this->expire = isset($config['expire']) ? $config['expire'] : 86400*365;

            $this->redis->pconnect($config["host"], $config["port"]);
            if (isset($config['password']) && $config['password']) {
                $this->redis->auth($config['password']);
            }
            $this->redis->setOption(\Redis::OPT_READ_TIMEOUT, -1);
        }
    }

    public function getRedis()
    {
        return $this->redis;
    }

    public function push($key, $value)
    {
        $value = json_encode($value);
        return $this->redis->lpush($key, $value);
    }

    public function pop($key)
    {
        $data = $this->redis->brPop($key, 10);
        if ($data) {
            if (isset($data[1])) {
                $data = $data[1];
            }
            $data = json_decode($data, true);
            return $data;
        } else {
            $pong = $this->redis->ping();
            if ($pong != '+PONG') {
                throw new \Exception('Redis ping failure!', 500);
            }
            usleep(100000);
        }
        return false;
    }

    public function len($key)
    {
        return $this->redis->llen($key);
    }

    public function get($key)
    {
        if (!$this->redis) {
            return false;
        }

        $key = $this->key($key);

        $result = $this->redis->get($key);

        $result = json_decode($result, true);

        return $result;
    }

    public function set($key, $value, $expire = 0)
    {
        if (!$this->redis) {
            return false;
        }

        if (!is_string($key)) {
            return false;
        }

        $key = $this->key($key);

        $expire = $expire > 0 ? $expire : $this->expire;

        $value = json_encode($value);

        $result = $this->redis->set($key, $value, $expire);

        return $result;
    }

    public function incr($key, $value)
    {
        if (!$this->redis) {
            return false;
        }

        if (!is_string($key)) {
            return false;
        }

        $key = $this->key($key);

        $result = $this->redis->incr($key, $value);

        return $result;
    }

    public function hGet($key, $hkey = false)
    {
        if (!$this->redis) {
            return false;
        }

        $key = $this->key($key);

        if ($hkey) {
            $result = $this->redis->hGet($key, $hkey);
        } else {
            $result = $this->redis->hGetAll($key);
        }
        return $result;
    }

    public function hDel($key, $hkey)
    {
        if (!$this->redis) {
            return false;
        }

        $key = $this->key($key);

        $result = $this->redis->hDel($key, $hkey);
        return $result;
    }

    public function hExists($key, $hkey)
    {
        if (!$this->redis) {
            return false;
        }

        $key = $this->key($key);

        $result = $this->redis->hExists($key, $hkey);
        return $result;
    }

    public function hKeys($key)
    {
        if (!$this->redis) {
            return false;
        }

        $key = $this->key($key);

        $result = $this->redis->hKeys($key);
        return $result;
    }

    public function hSet($key, $hkey, $value, $expire = 0)
    {
        if (!$this->redis) {
            return false;
        }

        if (!is_string($key)) {
            return false;
        }

        $key = $this->key($key);

        $expire = $expire > 0 ? $expire : $this->expire;

        $result = $this->redis->hSet($key, $hkey, $value);

        return $result;
    }

    public function delete($key)
    {
        if (!$this->redis) {
            return false;
        }

        if (!is_array($key)) {
            $key = $this->key($key);
        }

        if ($this->redis->del($key)) {
            return true;
        }
        return false;
    }

    public function close()
    {
        if (!$this->redis) {
            return false;
        }

        if ($this->redis->close()) {
            return true;
        }
        return false;
    }

    private function key($key)
    {
        return 'v1_' . $key;
//        return DEVER_APP_NAME . '_' . $key;
    }
}