/**
 * Initialize a new `Emitter`.
 *
 * @api public
 */

function Emitter(obj) {
    if (obj) return mixin(obj);
};

/**
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 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
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        obj[key] = Emitter.prototype[key];
    }
    return obj;
}

/**
 * Listen on the given `event` with `fn`.
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 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.on =
Emitter.prototype.addEventListener = function (event, fn) {
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    (this._callbacks['$' + event] = this._callbacks['$' + event] || [])
    .push(fn);
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};

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 * time then automatically removed.
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 * @api public
 */

Emitter.prototype.once = function (event, fn) {
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    on.fn = fn;
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};

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 * Remove the given callback for `event` or all
 * registered callbacks.
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 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.off =
Emitter.prototype.removeListener =
Emitter.prototype.removeAllListeners =
Emitter.prototype.removeEventListener = function (event, fn) {
    this._callbacks = this._callbacks || {};

    // all
    if (0 == arguments.length) {
        this._callbacks = {};
        return this;
    }

    // specific event
    var callbacks = this._callbacks['$' + event];
    if (!callbacks) return this;

    // remove all handlers
    if (1 == arguments.length) {
        delete this._callbacks['$' + event];
        return this;
    }

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};

/**
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 */

Emitter.prototype.emit = function (event) {
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    var args = [].slice.call(arguments, 1),
        callbacks = this._callbacks['$' + event];

    if (callbacks) {
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            callbacks[i].apply(this, args);
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    return this;
};

/**
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 *
 * @param {String} event
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 * @api public
 */

Emitter.prototype.listeners = function (event) {
    this._callbacks = this._callbacks || {};
    return this._callbacks['$' + event] || [];
};

/**
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 *
 * @param {String} event
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 * @api public
 */

Emitter.prototype.hasListeners = function (event) {
    return !!this.listeners(event).length;
};

function bind(obj, fn) {
    if ('string' == typeof fn) fn = obj[fn];
    if ('function' != typeof fn) throw new Error('bind() requires a function');
    var args = [].slice.call(arguments, 2);
    return function () {
        return fn.apply(obj, args.concat([].slice.call(arguments)));
    }
};

/**
 * WebSocket管理器
 * 支持最多同时实例化5个socket连接（微信环境限制目前最多为5个）
 * @param {String} url socket地址
 * @param {Object} opts 配置
 * 
 */
function WsManager(url, opts) {
    if(!(this instanceof WsManager)) {
        return new WsManager(url, opts)
    }
    
    if(url && (typeof url == 'object')) {
        opts = url
        url = undefined
    }

    Emitter(this)

    opts = opts || {}

    opts.path = opts.path || '/'

    this.opts = opts
    this.url = `${url}?uid=${GameGlobal.user.uid}&token=${GameGlobal.user.token}&channel=${GameGlobal.channel}&ver=${GameGlobal.os}&os=${GameGlobal.ver}`
    this.lastPing = null
    // this.socketCache = [] //缓存socket队列
    this.socketMaxCache = 5 //最大缓存socket实例数量
    this.readyState = 'closed' //当前socket状态
    this.binaryType = opts.binaryType || 'blob' //数据传输类型
    this._reconnectTimes = 0 //重连次数
    this._reconnectionDelay = opts.reconnectionDelay || 1000 //重连延迟
    this.reconnection(opts.reconnection !== false) // 是否自动重连
    this.reconnectionAttempts(opts.reconnectionAttempts || Infinity) //重连最大尝试次数
    this.timeout(null == opts.timeout ? 20000 : opts.timeout)
    this.logStyle = 'color:blue; font-size:16px;font-weight:bold;'
    this.keepAliveInterval = 15000;
    this.keepAliveTimeout = null;
    this.keepAliveMsg = '0';

    this.autoConnect = opts.autoConnect !== false //是否自动连接
    if(this.autoConnect) {
        this.connect()
    }
}


WsManager.prototype.connect = function(fn) {
    if(~this.readyState.indexOf('open')) {
        return this
    }

    this.readyState = 'opening';
    if (CC_WECHATGAME) {
        this.socket = this.openWxConnect();
    } else if (CC_QQPLAY) {
        this.socket = this.openQQConnect();
    } else {
        this.socket = this.openH5Connect()
    }
    // this.socketCache.push(_socket)
}

WsManager.prototype.reconnect = function() {
    clearInterval(this.keepAliveTimeout);

    if(this._reconnectTimes < this._reconnectionAttempts) {
        if(this.socket) {
            this.socket.close();
        }
        this._reconnectTimes += 1

        console.log(`%c [Socket正在尝试第${this._reconnectTimes}次重连]`, this.logStyle);
        this.readyState = 'reconnecting'
        setTimeout(() => {
            if (CC_WECHATGAME) {
                this.socket = this.openWxConnect();
            } else if (CC_QQPLAY) {
                this.socket = this.openQQConnect();
            } else {
                this.socket = this.openH5Connect()
            }
        }, this._reconnectionDelay);
    } else {
        if(this.socket) {
            this.socket.close();
        }
        console.log(`%c [达到最大重连失败次数，Socket关闭]`, this.logStyle);
    }
}

/// 外部调用直接关闭socket
WsManager.prototype.close = function() {
    clearInterval(this.keepAliveTimeout);
    if(this.socket) {
        // let index = this.socketCache.indexOf(this.socket);
        // if (index != -1){
        //     this.socketCache.splice(index, 1);
        // }
        this.socket.close();
        this._reconnection = false;
    }
}

WsManager.prototype.keepAlive = function() {
    let alivemsg = this.keepAliveMsg
    this.keepAliveTimeout = setInterval(() => {
        if(CC_WECHATGAME) {
            this.socket.send({
                data: alivemsg
            })
        } else if (CC_QQPLAY) {
            this.socket.send(alivemsg)
        } else {
            // this.socket.binaryType = 'blob'
            this.socket.send(alivemsg)
        }
    }, this.keepAliveInterval)
}

WsManager.prototype.openWxConnect = function() {
    let _header = {}
    let _socket = wx.connectSocket({
        url: this.url,
        header: _header,
        success: function(ret) {}
    })

    _socket.onOpen((res) => {
        this.readyState = 'open'
        this.emit('open', res)
        console.log(`%c [Socket连接成功: ${this.url.split("&token")[0]}]`, this.logStyle);
        // 每隔一段时间发一个心跳包保持连接状态
        this.keepAlive();
    })

    _socket.onClose((res) => {
        this.readyState = 'closed';
        
        //只要关闭就重连（暂时性处理）并且不是在后台 不进行重连
        if(this._reconnection && !GameGlobal.isOnHide ) {
            this.reconnect()
        }

        this.emit('close', res)
        console.log(`%c [Socket连接关闭: ${res}]`, this.logStyle)
    })

    _socket.onMessage((res) => {
        
        if(res.data != 1) {
            this.emit('message', res.data)
        }
                
        GameGlobal._socketCount += 1;
        if (GameGlobal._socketCount > 10000) {
            GameGlobal._socketCount = 2;
        }
        console.log(`%c [接收到Socket消息: ${JSON.stringify(res.data)}]`, this.logStyle);
    })

    _socket.onError((res) => {
        this.readyState = 'closed';
        if(this._reconnection && !GameGlobal.isOnHide) {
            this.reconnect()
        } else {
            _socket.close()
        }

        this.emit('error', res.errMsg);
        console.log(`%c [Socket错误: ${res.errMsg}]`, this.logStyle);
    })

    return _socket;
}

WsManager.prototype.openQQConnect = function() {

    let ws = new BK.WebSocket(this.url);

    let self = this;
    ws.onOpen = function(ws) {
        self.readyState = 'open';
        self.emit('open', '打开qqwebSocket');
        console.log(`%c [Socket连接成功: ${self.url.split("&token")[0]}]`, self.logStyle);
        // 每隔一段时间发一个心跳包保持连接状态
        self.keepAlive();
    }

    ws.onClose = function(ws) {
        self.readyState = 'closed';
        
        //只要关闭就重连（暂时性处理）
        if(self._reconnection) {
            self.reconnect();
        }

        self.emit('close', 'qq websocket关闭');
        console.log(`%c [Socket连接关闭]`, self.logStyle);
    }

    
    ws.onError = function(ws) {
        if(self._reconnection) {
            self.reconnect()
        } else {
            _socket.close()
        }

        self.emit('error', 'error')
        console.log(`%c [Socket错误]`, self.logStyle);
    }


    ws.onMessage = function(ws, res) {
        if(res.data != 1) {
            let str = res.data.readAsString();
            self.emit('message', str);
        }

        console.log(`%c [接收到Socket消息: ${JSON.stringify(res.data)}]`, self.logStyle);
    }

    ws.connect();

    return ws;
}

WsManager.prototype.openH5Connect = function() {
    let _socket = new WebSocket(this.url);
    _socket.binaryType = "arraybuffer";

    _socket.onopen = (event) => {
        this.readyState = 'open'
        this.emit('open', event)
        console.log(`%c [Socket连接成功: ${this.url.split("&token")[0]}]`, this.logStyle);

        // 每隔一段时间发一个心跳包保持连接状态
        this.keepAlive()
    }

    _socket.onclose = (event) => {
        this.readyState = 'closed';
        let code = event.code
        let reason = event.reason
        let wasClean = event.wasClean

        //只要关闭就重连（暂时性处理）
        if(this._reconnection) {
            this.reconnect()
        }

        this.emit('close', event)
        console.log(`%c [Socket连接关闭: ${reason}]`, this.logStyle)
    }

    _socket.onmessage = (event) => {
        
        if(event.data != 1) {
            this.emit('message', event.data)
        }
        console.log(`%c [接收到Socket消息: ${event.data}]`, this.logStyle);
    }

    _socket.onerror = (event) => {
        if(this._reconnection) {
            this.reconnect()
        } else {
            _socket.close()
        }

        this.emit(event)
        console.log(`%c [Socket错误: ${JSON.stringify(event)}]`, this.logStyle);
    }
    return _socket
}

WsManager.prototype.send = function(data) {
    console.log(`%c [发送Socket数据: ${data}]`, this.logStyle);

    if(CC_WECHATGAME) {
        let buffer = data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength)
        this.socket.send({
            data: buffer,
            success: function(res) {
                console.log('Success: ', JSON.stringify(res));
            },
            fail: function(res) {
                console.log('Fail: ', JSON.stringify(res));
            },
            complete: function(res) {
                console.log('Complete: ', JSON.stringify(res));
            }
        })
    } else {
        this.socket.binaryType = this.binaryType
        this.socket.send(data);
    }
}

// WsManager.prototype.onOpen = function(res) {
//     if(CC_WECHATGAME) {
//         this.socket.onOpen((res) => {
//             this.readyState = 'open'
//             callback && callback(res)
//             console.log(`%c [Socket连接成功: ${this.url.split("&token")[0]}]`, this.logStyle);
//         })
//     } else {
//         this.socket.onopen = () => {
//             this.readyState = 'open'
//             callback && callback()
//             console.log(`%c [Socket连接成功: ${this.url.split("&token")[0]}]`, this.logStyle);
//         }
//     } 
// }

// WsManager.prototype.onClose = function(callback) {
//     if(CC_WECHATGAME) {
//         this.socket.onClose((res) => {
//             this.readyState = 'closed'
//             callback && callback(res)
//             console.log(`%c [Socket连接关闭: ${res}]`, this.logStyle)
//         })
//     } else {
//         this.socket.onclose = (event) => {
//             this.readyState = 'closed';
//             let code = event.code
//             let reason = event.reason
//             let wasClean = event.wasClean
//             callback && callback(event)
//             console.log(`%c [Socket连接关闭: ${reason}]`, this.logStyle)
//         }
//     }
// }

// WsManager.prototype.onMessage = function(callback) {
//     if(CC_WECHATGAME) {
//         this.socket.onMessage((res) => {
//             let data = res.data
//             callback && callback(data)
//             console.log(`%c [接收到Socket消息: ${JSON.stringify(data)}]`, this.logStyle);
//         })
//     } else {
//         this.socket.onmessage = (event) => {
//             let data = event.data
//             callback && callback(data)
//             console.log(`%c [接收到Socket消息: ${JSON.stringify(data)}]`, this.logStyle);
//         }
//     }
// }

// WsManager.prototype.onError = function(callback) {
//     if(CC_WECHATGAME) {
//         this.socket.onError((res) => {
//             callback && callback(res.errMsg)
//             console.log(`%c [Socket错误: ${res.errMsg}]`, this.logStyle);
//         })
//     } else {
//         this.socket.onerror = (event) => {
//             callback && callback(event.data)
//             console.log(`%c [Socket错误: ${event.data}]`, this.logStyle);
//         }
//     }
// }

/**
 * 配置socket连接超时时间
 * @param {Number} v 连接超时时间
 * @return {WsManager} WsManager对象实例
 * @api public
 */
WsManager.prototype.timeout = function(v) {
    if(!arguments.length) {
        return this._timeout
    }
    this._timeout = v
    return this
}

/**
 * 自动重连配置
 * @param {Boolean} v 是否自动重连true / false
 * @return {WsManager} WsManager对象实例
 * @api public
 */
WsManager.prototype.reconnection = function(v) {
    if(!arguments.length) {
        return this._reconnection
    }
    this._reconnection = !!v
    return this
}

/**
 * 配置最大重连次数
 * @param {Number} v 最大重连次数
 * @return {WsManager} WsManager对象实例
 * @api public
 */
WsManager.prototype.reconnectionAttempts = function(v) {
    if (!arguments.length) {
        return this._reconnectionAttempts
    }
    this._reconnectionAttempts = v
    return this
}

module.exports = WsManager

// var Ws = function() {
//     this.socket = new io(Api.SocketLocal, {
//         autoConnect: false,         //自动连接
//         reconnection: true,         //断开自动重连
//         reconnectionDelay: 2000,    //自动重连时间，默认为2000毫秒
//         reconnectionAttempts: 10,   //最大重连尝试次数，默认为Infinity
//         forceNew: true,             //
//     })
//     this.socket.on("connect", () => {
//         console.log(`Socket connected: ${Api.SocketLocal}`);
//     })
// }

// Ws.prototype.open = function() {
//     this.socket.open()
// }

// /**
//  * 监听Websocket事件
//  * @param {String} eventName 监听事件名称
//  * @param {Function} callback 事件触发回调
//  */
// Ws.prototype.on = function(eventName, callback) {
//     if(eventName) {
//         this.socket.on(eventName, data => {
//             console.log(`Socket On Event: ${eventName}`);
//             callback && callback(data)
//         })
//     }
// }

// /**
//  * 上报Websocket报文
//  * @param {String} eventName 上报事件名
//  * @param {Object} data 上报数据
//  */
// Ws.prototype.emit = function(eventName, data) {
//     if(eventName) {
//         console.log(`Socket Do Emit: ${eventName}`, data);
//         this.socket.emit(eventName, data);
//     }
// }

// module.exports = new Ws();