using Core.Dtos;
using HslCommunication.LogNet;
using HslCommunication.MQTT;
using Microsoft.EntityFrameworkCore;
using NPOI.SS.Formula.Functions;
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.Reflection;
using System.Text;

namespace ProductionLineMonitor.WebAPI
{
    public static class HostMqttClient
    {
        public static IApplicationBuilder UseHostMqtt(this IApplicationBuilder builder,
            string ip, int port, string clientId, ILogNet log)
        {
            _log = log;
            Task.Run(() => Start(ip, port, clientId));
            return builder;
        }

        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"
            };
        private static ILogNet? _log;
        
        private static void Start(string ip, int port, string clientId)
        {
            DoWork();

            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;
            MqttClientConnect();

            _log?.WriteInfo("HostMqttClient start.");
        }
        private static void MqttClient_OnMqttMessageReceived(MqttClient client, MqttApplicationMessage message)
        {
            if (message.Topic == "/Machine/CimState")
            {
                Task.Run(() =>
                {
                    AnalysisCimState(message.Payload);
                });
            }
            else
            {
                _messages[_messageWriteIndex] = message;
                _messageWriteIndex++;
                if (_messageWriteIndex > _messageMaxCount)
                    _messageWriteIndex = 0;
            }
        }

        private static int _messageWriteIndex = 0;
        private static int _messageReadIndex = 0;
        private static int _messageMaxCount = 10000;
        private static MqttApplicationMessage[] _messages 
            = new MqttApplicationMessage[_messageMaxCount + 1];

        private static void DoWork()
        {
            Task.Run(() =>
            {
                while (true)
                {
                    if (_messageReadIndex != _messageWriteIndex)
                    {
                        Work(_messages[_messageReadIndex]);
                        _messageReadIndex++;
                    }

                    if (_messageReadIndex > _messageMaxCount)
                    {
                        _messageReadIndex = 0;
                    }

                    Thread.Sleep(1);
                }
            });
        }
        private static void Work(MqttApplicationMessage message)
        {
            try
            {
                switch (message.Topic)
                {
                    case "/Machine/EQPData":
                        AnalysisEQPData(message.Payload);
                        break;
                    case "/Machine/State":
                        break;
                    case "/Machine/CimState":
                        Task.Run(() =>
                        {
                            AnalysisCimState(message.Payload);
                        });
                        break;
                    case "/MQTT/ClientState":
                        AnalysisClientState(message.Payload);
                        break;
                    case "/Machine/Fault":
                        Task.Run(() =>
                        {
                            AnalysisFault(message.Payload);
                        });
                        break;
                    case "/Machine/GetEQPData":
                        AnalysisBachupEQPData(message.Payload);
                        break;
                    case "/Machine/GetFault":
                        AnalysisFault(message.Payload);
                        break;
                    default:
                        break;
                }
            }
            catch (Exception ex)
            {
                //Console.WriteLine(DateTime.Now);
                //Console.WriteLine(message.Topic);
                //Console.WriteLine(message.Payload);
                //Console.WriteLine(ex);
                _log?.WriteError(ex.Message);
            }
        }
        private static void MqttClientConnect()
        {
            while (true)
            {
                if (_mqttClient != null)
                {
                    var rev = _mqttClient.ConnectServer();
                    if (rev.IsSuccess)
                    {
                        _mqttClient.SubscribeMessage(_topics);
                        _log?.WriteInfo("MqttClient connect success.");
                        break;
                    }
                }
                Thread.Sleep(10 * 1000);
            }
        }
        private static void MqttClient_OnNetworkError(object sender, EventArgs e)
        {
            MqttClientConnect();
            _log?.WriteInfo("MqttClient OnNetworkError.");
        }
        private static void MqttClient_OnClientConnected(MqttClient client)
        {

        }
        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)
            });
        }
    }
}