'use strict';
const expect = require('chai').expect;
const setup  = require(__dirname + '/lib/setup');

let objects = null;
let states  = null;
let mqttClientEmitter = null;
let mqttClientDetector = null;
let connected = false;
let lastReceivedTopic1;
let lastReceivedMessage1;
let lastReceivedTopic2;
let lastReceivedMessage2;

let clientConnected1 = false;
let clientConnected2 = false;
let brokerStarted    = false;

const rules = {
    '/mqtt/0/test1': 'mqtt.0.test1',
    'mqtt/0/test2':  'mqtt.0.test2',
    'test3':         'mqtt.0.test3',
    'te s t4':       'mqtt.0.te_s_t4',
    'system/adapter/admin/upload':  'system.adapter.admin.upload',
    '/system/adapter/admin/upload': 'system.adapter.admin.upload'
};

function startClients(_done) {
    // start mqtt client
    const MqttClient = require(__dirname + '/lib/mqttClient.js');

    // Start client to emit topics
    mqttClientEmitter = new MqttClient(connected => {
        // on connected
        if (connected) {
            console.log('Test MQTT Emitter is connected to MQTT broker');
            clientConnected1 = true;
            if (_done && brokerStarted && clientConnected1 && clientConnected2) {
                _done();
                _done = null;
            }
        }
    }, (topic, message) => {
        console.log((new Date()).getTime() + ' emitter received ' + topic + ': ' + message.toString());
        // on receive
        lastReceivedTopic1   = topic;
        lastReceivedMessage1 = message ? message.toString() : null;
    }, {name: 'Emitter', user: 'user', pass: 'pass1'});

    // Start client to receive topics
    mqttClientDetector = new MqttClient(connected => {
        // on connected
        if (connected) {
            console.log('Test MQTT Detector is connected to MQTT broker');
            clientConnected2 = true;
            if (_done && brokerStarted && clientConnected1 && clientConnected2) {
                _done();
                _done = null;
            }
        }
    }, (topic, message) => {
        console.log((new Date()).getTime() + ' detector received ' + topic + ': ' + message.toString());
        // on receive
        lastReceivedTopic2   = topic;
        lastReceivedMessage2 = message ? message.toString() : null;
        console.log(JSON.stringify(lastReceivedMessage2));
    }, {name: 'Detector', user: 'user', pass: 'pass1'});
}

function checkMqtt2Adapter(id, _expectedId, _it, _done) {
    _it.timeout(1000);
    const value = 'Roger' + Math.round(Math.random() * 100);
    const mqttid = id;
    if (!_expectedId) {
        id = id.replace(/\//g, '.').replace(/\s/g, '_');
        if (id[0] === '.') id = id.substring(1);
    } else {
        id = _expectedId;
    }
    if (id.indexOf('.') === -1) id = 'mqtt.0.' + id;

    lastReceivedMessage1 = null;
    lastReceivedTopic1   = null;
    lastReceivedTopic2   = null;
    lastReceivedMessage2 = null;

    mqttClientEmitter.publish(mqttid, value, function (err) {
        expect(err).to.be.undefined;

        setTimeout(() => {
            /*expect(lastReceivedTopic2).to.be.equal(mqttid);
             expect(lastReceivedMessage2).to.be.equal(value);*/

            objects.getObject(id, function (err, obj) {
                expect(obj).to.be.not.null.and.not.undefined;
                expect(obj._id).to.be.equal(id);
                expect(obj.type).to.be.equal('state');

                if (mqttid.indexOf('mqtt') != -1) {
                    expect(obj.native.topic).to.be.equal(mqttid);
                }

                states.getState(id, (err, state) => {
                    expect(state).to.be.not.null.and.not.undefined;
                    expect(state.val).to.be.equal(value);
                    expect(state.ack).to.be.true;
                    _done();
                });
            });
        }, 100);
    });
}

function checkAdapter2Mqtt(id, mqttid, _it, _done) {
    const value = 'NewRoger' + Math.round(Math.random() * 100);
    _it.timeout(5000);

    console.log(new Date().getTime() + ' Send ' + id + ' with value '+ value);

    lastReceivedTopic1   = null;
    lastReceivedMessage1 = null;
    lastReceivedTopic2   = null;
    lastReceivedMessage2 = null;

    states.setState(id, {
        val: value,
        ack: false
    }, (err, id) => {
        setTimeout(() => {
            if (!lastReceivedTopic1) {
                setTimeout(() => {
                    expect(lastReceivedTopic1).to.be.equal(mqttid);
                    expect(lastReceivedMessage1).to.be.equal(value);
                    _done();
                }, 200);
            } else {
                expect(lastReceivedTopic1).to.be.equal(mqttid);
                expect(lastReceivedMessage1).to.be.equal(value);
                _done();
            }
        }, 200);
    });
}

function checkConnection(value, done, counter) {
    counter = counter || 0;
    if (counter > 20) {
        done && done('Cannot check ' + value);
        return;
    }

    states.getState('mqtt.0.info.connection', (err, state) => {
        if (err) console.error(err);
        if (state && typeof state.val === 'string' && ((value && state.val.indexOf(',') !== -1) || (!value && state.val.indexOf(',') === -1))) {
            connected = value;
            done();
        } else {
            setTimeout(() => {
                checkConnection(value, done, counter + 1);
            }, 1000);
        }
    });
}

describe('MQTT server: Test mqtt server', () => {
    before('MQTT server: Start js-controller', function (_done) {
        this.timeout(600000); // because of first install from npm
        setup.adapterStarted = false;

        setup.setupController(() => {
            const config = setup.getAdapterConfig();
            // enable adapter
            config.common.enabled  = true;
            config.common.loglevel = 'debug';
            config.native.publish  = 'mqtt.0.*';
            config.native.type     = 'server';
            config.native.user     = 'user';
            config.native.pass     = '*\u0006\u0015\u0001\u0004';
            setup.setAdapterConfig(config.common, config.native);

            setup.startController((_objects, _states) => {
                objects = _objects;
                states  = _states;
                brokerStarted = true;
                if (_done && brokerStarted && clientConnected1 && clientConnected2) {
                    _done();
                    _done = null;
                }
            });
        });

        startClients(_done);
    });

    it('MQTT server: Check if connected to MQTT broker', done => {
        if (!connected) {
            checkConnection(true, done);
        } else {
            done();
        }
    }).timeout(2000);

    for (const r in rules) {
        (function(id, topic) {
            it('MQTT server: Check receive ' + id, function (done) { // let FUNCTION here
                checkMqtt2Adapter(id, topic, this, done);
            });
        })(r, rules[r]);
    }

    // give time to client to receive all messages
    it('wait', done => {
        setTimeout(() => {
            done();
        }, 2000);
    }).timeout(3000);

    for (const r in rules) {
        (function(id, topic) {
            if (topic.indexOf('mqtt') !== -1) {
                it('MQTT server: Check send ' + topic, function (done) { // let FUNCTION here
                    checkAdapter2Mqtt(topic, id, this, done);
                });
            }
        })(r, rules[r]);
    }

    it('MQTT server: detector must receive /mqtt/0/test1', done => {
        const mqttid = '/mqtt/0/test1';
        const value  = 'AABB';
        mqttClientEmitter.publish(mqttid, JSON.stringify({val: value, ack: false}), err => {
            expect(err).to.be.undefined;

            setTimeout(() => {
                expect(lastReceivedTopic2).to.be.equal(mqttid);
                expect(lastReceivedMessage2).to.be.equal(value);
                done();
            }, 100);
        });
    });

    it('MQTT server: check reconnection', done => {
        mqttClientEmitter.stop();
        mqttClientDetector.stop();
        checkConnection(false, error => {
            expect(error).to.be.not.ok;
            startClients();
            checkConnection(true, error => {
                expect(error).to.be.not.ok;
                done();
            });
        });
    }).timeout(10000);

    after('MQTT server: Stop js-controller', function (done) {
        this.timeout(5000);
        mqttClientEmitter.stop();
        mqttClientDetector.stop();
        setup.stopController(() => {
            done();
        });
    });
});