using MQTTnet;
using MQTTnet.Client;
using MQTTnet.Client.Options;
using MyCore.Models;
using MyCore.Models.Aqara;
using MyCore.Models.Ikea;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using YeelightAPI;

namespace MyCore.Services
{
    public class MQTTService
    {
        private IMqttClient _client;
        private IMqttClientOptions _options;
        private string _mqttServer = "192.168.31.140";
        private string _user = "mqtt";
        private string _password = "mqtt";

        private LightState lightStateIkeaBulb = LightState.Undefined;

        // It's here to have the mqtt initialisation + logic for payload.. 

        // Related to which event occurs, a specific action is done.

        private YeelightService yeelightService = new YeelightService();

        public MQTTService()
        {
            try
            {
                // Create a new MQTT client.
                _client = new MqttFactory().CreateMqttClient();

                _options = new MqttClientOptionsBuilder()
                    .WithClientId("ApiService")
                    .WithTcpServer(_mqttServer)
                    .WithCredentials(_user, _password)
                    .WithCleanSession()
                    .Build();

                _client.ConnectAsync(_options, CancellationToken.None).ContinueWith(res => {
                    if (res.Status == TaskStatus.RanToCompletion)
                    {
                        Console.WriteLine("It's connected");
                    }
                    else
                    {
                        Console.WriteLine($"Error connecting to {_mqttServer}");
                    }
                });

                _client.UseDisconnectedHandler(async e =>
                {
                    Console.WriteLine("### DISCONNECTED FROM SERVER ###");
                    await Task.Delay(TimeSpan.FromSeconds(5));

                    try
                    {
                        await _client.ConnectAsync(_options, CancellationToken.None); // Since 3.0.5 with CancellationToken
                    }
                    catch
                    {
                        Console.WriteLine("### RECONNECTING FAILED ###");
                    }
                });

                _client.UseConnectedHandler(async e =>
                {
                    Console.WriteLine("### CONNECTED WITH SERVER ###");

                    // Subscribe to a topic
                    await _client.SubscribeAsync(new TopicFilterBuilder().WithTopic("#").Build());

                    Console.WriteLine("### SUBSCRIBED ###");
                });

                _client.UseApplicationMessageReceivedHandler(e =>
                {
                    Console.WriteLine("### RECEIVED APPLICATION MESSAGE ###");
                    Console.WriteLine($"+ Topic = {e.ApplicationMessage.Topic}");
                    Console.WriteLine($"+ Payload = {Encoding.UTF8.GetString(e.ApplicationMessage.Payload)}");
                    Console.WriteLine($"+ QoS = {e.ApplicationMessage.QualityOfServiceLevel}");
                    Console.WriteLine($"+ Retain = {e.ApplicationMessage.Retain}");
                    Console.WriteLine();

                    var topic = e.ApplicationMessage.Topic;
                    var payload = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);

                    // TODO

                    // Here take only zigbee2mqtt *

                    // Check if we have the guid in database

                    // If so retrieve the device in database and his Type

                    // Retrieve the device as an object (We have a defined list of devices. That's not a problem, it's a choice as we want reliability) 

                    // Check in the list of automations if we have something to do with the message (Check in mqtt input section)

                    // Automation = id, name, 

                    // Load everydevice in cache.. ? Performance ? 


                    switch (topic)
                    {
                        case "zigbee2mqtt/0x00158d00029a7b65":
                            try
                            {
                                var test = JsonConvert.DeserializeObject<Cube>(payload);
                                if (test.Action == "shake")
                                {
                                    var labLamp = yeelightService.devices.Where(d => d.Hostname == "192.168.31.74").FirstOrDefault();
                                    Task.Run(async () => { await yeelightService.Toggle(labLamp); });
                                }
                                if (test.Action == "slide")
                                {
                                    if (lightStateIkeaBulb == LightState.Undefined || lightStateIkeaBulb == LightState.Off) 
                                        PublishMessage("zigbee2mqtt/0x14b457fffe7628fa/set", "{\"state\": \"ON\"}");
                                    else
                                        PublishMessage("zigbee2mqtt/0x14b457fffe7628fa/set", "{\"state\": \"OFF\"}");
                                }
                            }
                            catch (Exception ex)
                            {
                                Console.WriteLine($"Error cube ! Exception: {ex}");
                            }
                            break;
                        case "zigbee2mqtt/0x14b457fffe7628fa":
                            try
                            {
                                var lightState = JsonConvert.DeserializeObject<LightBulb>(payload);

                                if (lightState.State == "ON") 
                                    lightStateIkeaBulb = LightState.On;
                                else
                                    lightStateIkeaBulb = LightState.Off;
                            }
                            catch (Exception ex)
                            {
                                Console.WriteLine($"Error IkeaLightBulb ! Exception: {ex}");
                            }
                            break;
                        default:
                            Console.WriteLine("Hello nothing to do here..");
                            break;
                    }

                });

            }
            catch (Exception e)
            {
                Console.WriteLine($"Error during creation of MQTTService with {_mqttServer}, exceptions : {e}");
            }

        }

        public async void PublishMessage(string topic, string message)
        {
            var mqttMessage = new MqttApplicationMessageBuilder()
                .WithTopic(topic)
                .WithPayload(message)
                .WithExactlyOnceQoS()
                .WithRetainFlag()
                .Build();

            if (_client.IsConnected)
                await _client.PublishAsync(mqttMessage);
        }

        /*protected async Task Start()
        {
            var server = new MqttFactory().CreateMqttServer();

            try
            {
                var client1 = new MqttFactory().CreateMqttClient();
                await client1.ConnectAsync(new MqttClientOptionsBuilder().WithTcpServer(_mqttServer).Build());
                var message = new MqttApplicationMessageBuilder().WithPayload("It's a test").WithTopic("IpAddress").WithRetainFlag().Build();
                await client1.PublishAsync(message);

                await Task.Delay(500);

            }
            finally
            {
                await server.StopAsync();
            }
        }*/

    }
}