using Core.Dtos;
using HslCommunication.MQTT;
using Microsoft.AspNetCore.Builder;
using Microsoft.EntityFrameworkCore;
using ProductionLineMonitor.Application.Services.CimService;
using ProductionLineMonitor.Core.Dtos;
using ProductionLineMonitor.Core.Services;
using ProductionLineMonitor.Core.Services.Fault;
using ProductionLineMonitor.Core.Utils;
using ProductionLineMonitor.EntityFramework;
using ProductionLineMonitor.EntityFramework.Repositories;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ProductionLineMonitor.Web.HostedServices
{
    public static class HostMqttClient
    {
        private static MqttClient _mqttClient = null;

        private static readonly string[] _topics =
            new string[] {
                //"/Machine/EQPData",
                //"/Machine/State",
                //"/Machine/CimState",
                //"/MQTT/ClientState",
                //"/Machine/Fault",
                //"/Machine/GetEQPData",
                //"/Machine/GetFault"
            };

        public static IApplicationBuilder UseHostMqtt(this IApplicationBuilder builder,
            string ip, int port, string clientId)
        {
            Task.Run(() => Start(ip, port, clientId));
            return builder;
        }

        private static void Start(string ip, int port, string clientId)
        {
            var options = new MqttConnectionOptions()
            {
                IpAddress = ip,
                Port = port,
                ClientId = clientId
            };

            _mqttClient = new MqttClient(options);
            _mqttClient.OnClientConnected += MqttClient_OnClientConnected;
            _mqttClient.OnNetworkError += MqttClient_OnNetworkError;
            _mqttClient.OnMqttMessageReceived += MqttClient_OnMqttMessageReceived;
            
            Run();
        }

        private static void Run()
        {
            while (true)
            {
                var rev = _mqttClient.ConnectServer();
                if (rev.IsSuccess)
                {
                    _mqttClient.SubscribeMessage(_topics);
                    break;
                }
                Thread.Sleep(10 * 1000);
            }
        }

        private static void MqttClient_OnNetworkError(object sender, EventArgs e)
        {
            Run();
        }

        private static void MqttClient_OnClientConnected(MqttClient client)
        {

        }

        private static void MqttClient_OnMqttMessageReceived(MqttClient client, string topic, byte[] payload)
        {
            Task.Run(() =>
            {
                try
                {
                    switch (topic)
                    {
                        case "/Machine/EQPData":
                            AnalysisEQPData(payload);
                            break;
                        case "/Machine/State":
                            break;
                        case "/Machine/CimState":
                            AnalysisCimState(payload);
                            break;
                        case "/MQTT/ClientState":
                            AnalysisClientState(payload);
                            break;
                        case "/Machine/Fault":
                            AnalysisFault(payload);
                            break;
                        case "/Machine/GetEQPData":
                            AnalysisBachupEQPData(payload);
                            break;
                        case "/Machine/GetFault":
                            AnalysisFault(payload);
                            break;
                        default:
                            break;
                    }
                }
                catch (Exception ex) 
                {
                    Console.WriteLine(DateTime.Now);
                    Console.WriteLine(topic);
                    Console.WriteLine(payload);
                    Console.WriteLine(ex);
                }
            });
        }

        private static void AnalysisBachupEQPData(byte[] payload)
        {
            string json = Encoding.UTF8.GetString(payload);
            EQPDataDto dto = json.ToObject<EQPDataDto>();
            using UnitOfWork unitOfWork = GetUnitOfWork();
            ExternalService externalService = new ExternalService(unitOfWork);
            externalService.AddEQPData(dto);
        }

        private static void AnalysisFault(byte[] payload)
        {
            string json = Encoding.UTF8.GetString(payload);
            IEnumerable<EQPDataFaultRecordDto> faults = json.ToObject<IEnumerable<EQPDataFaultRecordDto>>();
            using UnitOfWork unitOfWork = GetUnitOfWork();
            FaultService faultService = new FaultService(unitOfWork);
            faultService.AddMachineFaults(faults);
        }

        private static void AnalysisCimState(byte[] payload)
        {
            string json = Encoding.UTF8.GetString(payload);
            var state = json.ToObject<CimDto>();
            using UnitOfWork unitOfWork = GetUnitOfWork();
            CimService cimService = new CimService(unitOfWork);
            cimService.CreateOrUpdate(state);
        }

        private static void AnalysisEQPData(byte[] payload)
        {
            string json = Encoding.UTF8.GetString(payload);
            EQPDataDto dto = json.ToObject<EQPDataDto>();
            using UnitOfWork unitOfWork = GetUnitOfWork();
            ExternalService externalService = new ExternalService(unitOfWork);
            externalService.AddEQPData(dto);
        }

        private static void AnalysisClientState(byte[] payload)
        {
            string json = Encoding.UTF8.GetString(payload);
            var state = json.ToObject<MqttClientStateDto>();
            using UnitOfWork unitOfWork = GetUnitOfWork();
            CimService cimService = new CimService(unitOfWork);
            cimService.UpdateMqttClientState(state);
        }

        private static UnitOfWork GetUnitOfWork()
        {
            var optionsBuilder = new DbContextOptionsBuilder<ProductionLineContext>();
            optionsBuilder.UseSqlite(DBOptions.ConnectionString);
            var options = optionsBuilder.Options;
            ProductionLineContext context = new ProductionLineContext(options);
            UnitOfWork unitOfWork = new UnitOfWork(context);
            return unitOfWork;
        }

        public static void Pub(string topic, string json)
        {
            if (_mqttClient == null || _mqttClient.IsConnected == false)
            {
                return;
            }
            _mqttClient.PublishMessage(new MqttApplicationMessage()
            {
                Topic = topic,
                QualityOfServiceLevel = MqttQualityOfServiceLevel.AtLeastOnce,
                Payload = Encoding.UTF8.GetBytes(json)
            });
        }
    }
}