const TuyAPI = require('tuyapi');
const TuyColor = require('./tuya-color');
const debug = require('debug')('TuyAPI-device');
const debugTuya = require('debug')('TuyAPI-ext');
const debugTimer = require('debug')('TuyAPI-device-timer');

/**
 * Sets a property on a device.
 * @param {Object} options
 * @param {Number} [options.dps=1] DPS index to set
 * @param {*} options.set value to set
 * @example
 * // set default property
 * tuya.set({set: true}).then(() => console.log('device was changed'))
 * @example
 * // set custom property
 * tuya.set({dps: 2, set: true}).then(() => console.log('device was changed'))
 * @returns {Promise<Boolean>} - returns `true` if the command succeeded
 */
const Parser = require('tuyapi/lib/message-parser')
TuyAPI.prototype.set = function (options) {
    let dps = {};

    if (options.dps != undefined || options.set != undefined) {
        if (options.dps === undefined) {
            dps = {
                1: options.set
            };
        } else {
            dps = {
                [options.dps.toString()]: options.set
            };
        }
    } else {
        dps = options;
    }

    const now = new Date();
    const timeStamp = (parseInt(now.getTime() / 1000, 10)).toString();

    const payload = {
        devId: this.device.id,
        uid: '',
        t: timeStamp,
        dps
    };

    debugTuya('Payload:', this.device.ip);
    debugTuya(payload);

    // Encrypt data
    const data = this.device.cipher.encrypt({
        data: JSON.stringify(payload)
    });

    // Create MD5 signature
    const md5 = this.device.cipher.md5('data=' + data +
        '||lpv=' + this.device.version +
        '||' + this.device.key);

    // Create byte buffer from hex data
    const thisData = Buffer.from(this.device.version + md5 + data);
    const buffer = Parser.encode({
        data: thisData,
        commandByte: 7 // 0x07
    });

    // Send request to change status
    return new Promise((resolve, reject) => {
        this._send(buffer, 7, false).then(() => {
            resolve(true);
        }).catch(error => {
            reject(error);
        });
    });
}

/**
 *
    var steckdose = new TuyaDevice({
        id: '03200240600194781244',
        key: 'b8bdebab418f5b55',
        ip: '192.168.178.45',
        type: "socket"
    });
 */

var TuyaDevice = (function () {
    var devices = [];
    var events = {};

    var autoTimeout = undefined;

    function checkExisiting(id) {
        var existing = false;
        // Check for existing instance
        devices.forEach(device => {
            if (device.hasOwnProperty("options")) {
                if (id === device.options.id) {
                    existing = device;
                }
            }
        });
        return existing;
    }

    function resetTimer() {
        return;
        debugTimer("Reset timer for auto disconnect all devices");
        clearTimeout(autoTimeout);
        autoTimeout = setTimeout(() => {
            debugTimer("Auto disconnect all devices");
            TuyaDevice.disconnectAll();
        }, 10000);
    }

    function TuyaDevice(options) {
        var device = this;
        // Check for existing instance
        if (existing = checkExisiting(options.id)) {
            return existing;
        }

        if (!(this instanceof TuyaDevice)) {
            return new TuyaDevice(options);
        }

        options.type = options.type || "socket";
        options.persistentConnection = true;

        Object.defineProperty(this, 'type', {
            value: options.type
        });

        Object.defineProperty(this, 'options', {
            value: options
        });

        Object.defineProperty(this, 'device', {
            value: new TuyAPI(this.options)
        });

        this.device.on('connected', () => {
            debug('Connected to device.');
            device.triggerAll('connected');
        });

        this.device.on('disconnected', () => {
            debug('Disconnected from device.');
            device.triggerAll('disconnected');
        });

        this.device.on('data', data => {
            debug('Data from device:', data);
            device.triggerAll('data', data);
        });

        this.device.on('error', (err) => {
            debug('Error: ' + err);
            device.triggerAll('error', err);
        });

        this.device.connect();
        devices.push(this);
        resetTimer();
    }

    TuyaDevice.prototype.triggerAll = function (name, argument) {
        var device = this;
        var e = events[name] || [];
        e.forEach(event => {
            event.call(device, argument);
        });
    }

    TuyaDevice.prototype.on = function (name, callback) {
        var device = this;
        this.device.on(name, function () {
            callback.apply(device, arguments);
        });
    }

    TuyaDevice.prototype.get = function (options) {
        resetTimer();
        return this.device.get(options);
    }

    TuyaDevice.prototype.set = function (options, callback) {
        var device = this;
        debug('Setting status:', options);
        return this.device.set(options).then(result => {
            device.get().then(status => {
                debug('Result of setting status to', status);
                if (callback != undefined) {
                    callback.call(device, status);
                }
                return;
            });
        });
        resetTimer();
    }

    TuyaDevice.prototype.onoff = function (newStatus, callback) {
        newStatus = newStatus.toLowerCase();
        debug("onoff: " + newStatus);
        if (newStatus == "on") {
            this.on(callback);
        }
        if (newStatus == "off") {
            this.off(callback);
        }
        if (newStatus == "toggle") {
            this.toggle(callback);
        }
    }

    TuyaDevice.prototype.on = function (callback) {
        var device = this;
        device.get().then(status => {
            device.set({
                set: true
            }, callback);
        });
    }

    TuyaDevice.prototype.off = function (callback) {
        var device = this;
        device.get().then(status => {
            device.set({
                set: false
            }, callback);
        });
    }

    TuyaDevice.prototype.toggle = function (callback) {
        var device = this;
        device.get().then(status => {
            device.set({
                set: !status
            }, callback);
        });
    }

    TuyaDevice.prototype.setColor = function (hexColor, callback) {
        debug("Set color to", hexColor);
        var device = this;
        var tuya = this.device;
        var color = new TuyColor(tuya);
        var dps = color.setColor(hexColor);

        device.get().then(status => {
            device.set(dps, callback);
        });
        resetTimer();
    }

    TuyaDevice.prototype.connect = function (callback) {
        this.device.connect(callback);
    }

    TuyaDevice.prototype.disconnect = function (callback) {
        this.device.disconnect(callback);
    }

    Object.defineProperty(TuyaDevice, 'devices', {
        value: devices
    });

    TuyaDevice.connectAll = function () {
        devices.forEach(device => {
            device.connect();
        });
    }

    TuyaDevice.disconnectAll = function () {
        devices.forEach(device => {
            device.disconnect();
        });
    }

    TuyaDevice.onAll = function (name, callback) {
        if (events[name] == undefined) {
            events[name] = [];
        }
        events[name].push(callback);
        devices.forEach(device => {
            device.triggerAll(name);
        });
    }

    return TuyaDevice;
}());

module.exports = TuyaDevice;