function check(v, re, msg) {
    if (!re.test(v)) {
        alert(msg)
    }
}

function padPkcs7(data) {

    var d = data.length % 16;
    d = 16 - d;
    var arr = Array.from(data)
    for (var i = 0; i < d; i++) {
        arr.push(d)
    }
    return arr;
}

function stripPcks7(data) {
    var arr = Array.from(data)
    var padder = arr[arr.length - 1];
    return arr.slice(0, arr.length - padder);
}

function ecb(bytes, cb) {
    var ret = []
    for (var i = 0; i < bytes.length; i += 16) {
        var d = bytes.slice(i, i + 16);
        var en = cb(d)
        ret = ret.concat(Array.from(en))
    }
    return ret;
}


function stringToHex(str){
    var val = "";
    for (var i = 0; i < str.length; i++) {
        var v = str.charCodeAt(i).toString(16);
        if ( v.length < 2 ) {
            v = "0" + v;
        }
        val += v;
    }
    return val
}

function hexToString(hex){
    var arr = hex.split("")
    var out = ""
    for (var i = 0; i < arr.length / 2; i++) {
        var tmp = "0x" + arr[i * 2] + arr[i * 2 + 1]
        var charValue = String.fromCharCode(tmp);
        out += charValue
    }
    return out
}

class ActiveIC {
    constructor() {
        this.server = "ws://127.0.0.1:22222/active";
        this.waitMap = {}

    }

    __debug(...str) {
        if (window.active_debug) {
            console.log(...str)
        }
    }

    connect() {
        this.__debug("connect")
        var _this = this;
        try {

            if (this.sock) {
                this.sock.onclose = function () {
                }
                this.sock.close()
            }

            this.sock = new WebSocket(this.server);
            this.__debug("sock")
            this.sock.onopen = function () {
                _this.__debug("open");
                _this.sock.isopened = true;
                _this.sock.onmessage = function (e) {
                    _this.__debug(e.data)
                    var ret = JSON.parse(e.data);

                    var cb = _this.waitMap[ret.id]
                    cb && cb(ret)
                }
            };

            this.sock.onclose = function () {
                _this.sock.isopened = false;
                _this.__debug("close");
                _this.reconnect();
            };

            // this.sock.onerror = function () {
            //     _this.sock.isopened = false;
            //     this.__debug("onerror");
            //     _this.reconnect();
            // };

        } catch (e) {
            _this.__debug("onerror");
            _this.reconnect();
        }

    }

    reconnect() {
        this.__debug("reconnect")
        var _this = this;

        if (_this.sock && _this.sock.isopened) {
            this.__debug("miss")
            return
        }

        setTimeout(function () {
            _this.connect();
        }, 3000);
    }

    __send(cmd, param, cb) {
        var id = (Math.random() + "").substr(2);
        this.sock.send(
            JSON.stringify({
                id: id,
                cmd: cmd,
                param: param
            })
        );
        if (cb) {
            this.waitMap[id] = cb;
        }
    }

    __check(v, re, msg, reject) {
        if (!re.test(v)) {
            reject && reject({
                msg,
                code: "C0"
            })
        }
    }

    readText(addr, len) {
        var _this = this;
        return new Promise(function (resolve, reject) {

            if (!_this.sock || !_this.sock.isopened) {
                reject({
                    code: "CB",
                    msg: "Active 通信失败"
                })
            }

            _this.__check(addr, /\d{1,2}/g, "用户编号填写错误！", reject);
            _this.__check(len, /\d{1,2}/g, "用户类型填写错误！", reject);

            _this.__send("read", {
                addr, len
            }, function (ret) {
                if (ret.code === "00") {
                    resolve(ret)
                } else {
                    reject(ret)
                }
            })
        })
    }
    writeText(addr, data) {
        return this.writeHex(addr, stringToHex( data ))
    }
    writeHex(addr, data) {
        var _this = this;
        return new Promise(function (resolve, reject) {

            if (!_this.sock || !_this.sock.isopened) {
                reject({
                    code: "CB",
                    msg: "Active 通信失败"
                })
            }


            _this.__check(addr, /\d{1,2}/g, "地址填写错误！", reject);
            _this.__check(data, /^([A-Fa-f0-9][A-Fa-f0-9])+$/g, "数据填写错误！", reject);

            _this.__send("write", {
                addr, data
            }, function (ret) {
                if (ret.code === "00") {
                    resolve(ret)
                } else {
                    reject(ret)
                }
            })
        })
    }

}


/**
 * 检测通过返回 true
 * 检测不通过返回 fase
 */
ActiveIC.checkSupport = function () {
    try {
        if (!!window.WebSocket && window.WebSocket.prototype.send) {
            return true;
        } else {
            console.error("您的浏览器不支持！")
            return false;
        }
    } catch (e) {
        console.error("当前环境不支持！", e)
        return false;
    }
}