using log4net;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Wayne.ForecourtControl;
using Wayne.ForecourtControl.Fusion;
using Wayne.Lib;

namespace FdcClient
{
    public class PumpDeliveryProgressInfo
    {
        public PumpDeliveryProgressInfo()
        {
            CurrentQty = 0;
            CurrentAmount = 0;
            LogicalHoseId = 0;
            GradeFriendlyName = 0;
            GradeId = string.Empty;
        }
        public int PumpId { get; set; }
        public string GradeId { get; set; }

        public int LogicalHoseId { get; set; }
        public int GradeFriendlyName { get; set; }

        public Decimal CurrentQty { get; set; }
        public Decimal CurrentAmount { get; set; }
    }

    public class MyData
    {
        public AuthorizeParameters authParams = null;   // pump auth parameters
        public IPump pump = null;                       // pump interface
        public bool authAfterReserve = false;
        public int pumpId = 0;
        public EventHandler<AsyncCompletedEventArgs> ResultHandler = null;
        public EventHandler<AsyncCompletedEventArgs<PumpAccumulatorReading>> TotalizerEventHandler;
    }

    public class FdcClient
    {
        public EventHandler<PumpDeliveryProgressInfo> PumpDeliveryProgressChangedEventHandler;

        public EventHandler<ConnectionChangedEventArgs> FCConnectionStateChangeEventHandler;

        public EventHandler<FuellingStateChangeEventArgs> FuellingStateEventHandler;

        private IForecourtControl forecourtControl;
        static ILog logger = log4net.LogManager.GetLogger("Main");

        private void RegisterPumpsEvents()
        {
            logger.Info("RegisterPumpsEvents Pumps count:" + forecourtControl.Pumps.Count);
            for (int i = 0; i < forecourtControl.Pumps.Count; i++)
            {
                this.forecourtControl.Pumps[i].OnFuellingDataChange += pump_OnFuellingDataChange;
                this.forecourtControl.Pumps[i].OnFuellingStateChange += pump_OnFuellingStateChange;
                this.forecourtControl.Pumps[i].OnNozzleStateChange += pump_OnNozzleStateChange;
                this.forecourtControl.Pumps[i].OnStateChange += pump_OnPumpStateChange;
                this.forecourtControl.Pumps[i].OnEventOccured += pump_OnEventOccured;
                this.forecourtControl.Pumps[i].RunningFuellingUpdates = false;
            }
        }

        private void UnRegisterPumpsEvents()
        {
            for (int i = 0; i < forecourtControl.Pumps.Count; i++)
            {
                this.forecourtControl.Pumps[i].OnFuellingDataChange -= pump_OnFuellingDataChange;
                this.forecourtControl.Pumps[i].OnFuellingStateChange -= pump_OnFuellingStateChange;
                this.forecourtControl.Pumps[i].OnNozzleStateChange -= pump_OnNozzleStateChange;
                this.forecourtControl.Pumps[i].OnStateChange -= pump_OnPumpStateChange;
                this.forecourtControl.Pumps[i].OnEventOccured -= pump_OnEventOccured;
                this.forecourtControl.Pumps[i].RunningFuellingUpdates = false;
            }
        }


        private void pump_OnEventOccured(object sender, PumpEventOccuredEventArgs e)
        {
            logger.Info("OnEventOccured, current event is:" + e.EventType);
        }

        private void pump_OnNozzleStateChange(object sender, NozzleStateChangeEventArgs e)
        {
            logger.Info("Nozzle State changed, current state is:" + e.NozzleState);
            var pump = sender as FUSIONPump;
            if (pump != null && pump.State == PumpState.Authorized && e.NozzleState == NozzleState.In)
            {
                var myData = new MyData();
                myData.pump = pump;
                pump.UnauthorizeAsync(UnAuthorizePumpComplete, myData);
            }
        }

        private void pump_OnFuellingDataChange(object sender, FuellingDataChangeEventArgs e)
        {
            logger.Info("FuellingDataChange");

            var gradeId = e.Fuelling.FuelGrade.ToString();
            if (PumpDeliveryProgressChangedEventHandler != null)
            {
                var pumpDeliveryInfo = new PumpDeliveryProgressInfo()
                {
                    PumpId = ((FUSIONPump)e.Fuelling.Pump).realId,
                    GradeId = gradeId,
                    LogicalHoseId = ((FUSIONNozzle)e.Fuelling.Nozzle).realId,
                    GradeFriendlyName = int.Parse(gradeId),
                    CurrentQty = e.Quantity,
                    CurrentAmount = e.Amount
                };

                logger.Info("FuellingDataChange - ProcessPumpDeliveryProgressChange CurrentQty:" + pumpDeliveryInfo.CurrentQty + "CurrentAmount:" + pumpDeliveryInfo.CurrentAmount);
                PumpDeliveryProgressChangedEventHandler.Invoke(this, pumpDeliveryInfo);
            }
        }

        private void pump_OnPumpStateChange(object sender, PumpStateChangeEventArgs e)
        {
            logger.Info(string.Format("Pump State Changed -- From FDC, state is: {0}", e.PumpState));

            if (e.PumpState == PumpState.Starting)
            {
                //according to codes in previous project, when pump in in these state, can set the current fuelling data to 0
                if (this.PumpDeliveryProgressChangedEventHandler != null)
                {
                    var pumpDeliveryInfo = new PumpDeliveryProgressInfo() { PumpId = e.Pump.Id };
                    PumpDeliveryProgressChangedEventHandler.Invoke(this, pumpDeliveryInfo);
                }
            }
        }

        private void pump_OnFuellingStateChange(object sender, FuellingStateChangeEventArgs e)
        {
            logger.Info("Fuelling State changed, current state is:" + e.State + " PumpId:" + e.Fuelling.Pump.Id);

            if (e.State.Equals(FuellingState.PayableTransaction))
            {
                //#if DEBUG
                //                var handler = new TransactionHandler();
                //                var result = handler.Handle(e.Fuelling, "testtransaction", PaymentMethod.IC);

                //                var setting = new JsonSerializerSettings();
                //                setting.Converters.Add(new PosJsonDateConverter());
                //                var value = JsonConvert.SerializeObject(result, setting);
                //                scannerLogger.Info(value);

                //                ClearFuelSale(e.Fuelling);
                //#else
                //scannerLogger.Info("Fuelling State changed, current state is: " + e.State + " PumpId: " + e.Fuelling.Pump.Id + ", will start Sniffing");
                //var icTrxSniffer = new TransactionSniffer();
                //icTrxSniffer.OnMatchingTrxScannedFromMySql += (s, a) =>
                //{
                //    try
                //    {
                //        scannerLogger.Info($"OnMatchingTrxScannedFromMySql, trx was paid by: {a.MOP}");
                //        var mop = EnumSupport.Parse(a.MOP, true, PaymentMethod.CASH);
                //        scannerLogger.Info($"   Parsed MOP is: {mop}");
                //        if (mop != PaymentMethod.IC)
                //        {
                //            scannerLogger.Info($"Will do nothing since it's not an IC pay or valid Customer IC Card trx");
                //            return;
                //        }

                //        var handler = new ICTransactionUploader();
                //        var result = handler.Handle(e.Fuelling, a.QRCode, mop);


                //        scannerLogger.Info("Start ClearFuelSale...");
                //        ClearFuelSale(e.Fuelling);
                //    }
                //    catch (Exception exp)
                //    {
                //        scannerLogger.Error("Finalize IC trx to cloud exceptioned: " + exp);
                //    }
                //};
                //icTrxSniffer.StartScanAsync(e.Fuelling.Pump.Id, e.Fuelling.FuellingSequenceNumber);
                ////#endif
            }

            if (e.State == FuellingState.PayableTransaction)
            {
                e.Fuelling.SetAsPaidAsync(SetAsPaidComplete, new object());
            }

            FuellingStateEventHandler?.Invoke(this, e);
        }

        /// <summary>
        /// Process the Close(A6) request from IC
        /// 1, Pump in IDLE state, do nothing, success response
        /// 2, Pump in Authorized state, unAuthorize pump
        /// 3, Pump in Fuelling state, stop fuelling
        /// </summary>
        /// <param name="pumpId"></param>
        /// <param name="resultHandler"></param>
        public void ClosePump(byte pumpId, EventHandler<AsyncCompletedEventArgs> resultHandler)
        {
            logger.Info("ClosePump Request for Pump:" + pumpId);
            FUSIONPump pumpToClose = null;
            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.ResultHandler = resultHandler;
            foreach (var p in this.forecourtControl.Pumps)
            {
                if (p.Id == pumpId)
                {
                    pumpToClose = (FUSIONPump)p;
                    logger.Info("ClosePump current State:" + pumpToClose.State + " PumpId:" + pumpId);
                    break;
                }
            }
            if (pumpToClose != null)
            {
                myData.pump = pumpToClose;
                if (pumpToClose.State == PumpState.Authorized)
                {
                    this.UnAuthorizePump(pumpId, resultHandler);
                }
                else if (pumpToClose.State == PumpState.Fuelling)
                {
                    pumpToClose.StopAsync(StopCompleted, myData);
                }
                else
                {
                    if (resultHandler != null)
                    {
                        var e = new AsyncCompletedEventArgs(true, myData);
                        resultHandler.Invoke(this, e);
                    }
                }
                return;
            }

            if (resultHandler != null)
            {
                var e = new AsyncCompletedEventArgs(true, myData);
                resultHandler.Invoke(this, e);
            }
        }

        private void StopCompleted(object sender, AsyncCompletedEventArgs e)
        {
            logger.Info("StopCompleted, result:" + e.Success);
            var myData = (MyData)e.UserToken;
            myData.ResultHandler?.Invoke(this, e);
        }

        public void AuthPump(byte pumpId, AuthorizeParameters authPara, EventHandler<AsyncCompletedEventArgs> ResultHandler)
        {
            logger.Info("AuthPump, Trying to Auth Pump:" + pumpId + " AuthParameter PresetType:" + authPara.PresetType + " Value:" + authPara.PresetValue);

            if (authPara.PresetValue == decimal.MaxValue)
                logger.Info("Rounding requested/凑整命令");

            FUSIONPump pumpToAuth = null;
            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.authParams = authPara;

            foreach (var p in this.forecourtControl.Pumps)
            {
                if (p.Id == pumpId)
                {
                    pumpToAuth = (FUSIONPump)p;
                    logger.Info("AuthPump current State:" + pumpToAuth.State + " PumpId:" + pumpId);
                    break;
                }
            }

            if (pumpToAuth == null)
            {
                logger.Info("Ingore the Request, Invalid Pump Id");
                if (ResultHandler != null)
                {
                    AsyncCompletedEventArgs e = new AsyncCompletedEventArgs(false, myData);

                    ResultHandler.Invoke(this, e);
                }
                return;
            }

            myData.pump = pumpToAuth;
            myData.ResultHandler = ResultHandler;
            myData.authAfterReserve = true;
            logger.Info("AuthPump, reserving pump " + pumpToAuth.Id);
            pumpToAuth.ReserveAsync(FuellingType.OptCardPaid, pumpId, ReservedCompleted, myData);
        }


        public void RoundFueling(byte pumpId, AuthorizeParameters authPara, EventHandler<AsyncCompletedEventArgs> ResultHandler)
        {
            logger.Info("RoundingRequest, Trying to round fueling on Pump:" + pumpId + " AuthParameter PresetType:" + authPara.PresetType + " Value:" + authPara.PresetValue);

            FUSIONPump pumpToAuth = null;
            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.authParams = authPara;

            foreach (var p in this.forecourtControl.Pumps)
            {
                if (p.Id == pumpId)
                {
                    pumpToAuth = (FUSIONPump)p;
                    logger.Info("AuthPump current State:" + pumpToAuth.State + " PumpId:" + pumpId);
                    break;
                }
            }

            if (pumpToAuth == null)
            {
                logger.Info("Ingore the Request, Invalid Pump Id");
                if (ResultHandler != null)
                {
                    AsyncCompletedEventArgs e = new AsyncCompletedEventArgs(false, myData);

                    ResultHandler.Invoke(this, e);
                }
                return;
            }

            myData.pump = pumpToAuth;
            myData.ResultHandler = ResultHandler;
            myData.authAfterReserve = true;
            logger.Info("AuthPump, reserving pump " + pumpToAuth.Id);
            pumpToAuth.ReserveAsync(FuellingType.OptCardPaid, pumpId, RoundingPrepareCompleted, myData);
        }

        /// <summary>
        /// Clear trans response
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void SetAsPaidComplete(object sender, AsyncCompletedEventArgs e)
        {
            logger.Info("SetAsPaidComplete, result:" + e.Success);
            var myData = (MyData)e.UserToken;

            if (e.Success && myData.pump != null)
            {
                foreach (var f in myData.pump.Fuellings)
                {
                    logger.Info("Fuelling state is : " + f.State);
                }
                //Reserve&Auth or only Reserve
                if (myData.authAfterReserve || myData.authParams == null)
                {
                    myData.pump.ReserveAsync(FuellingType.OptCardPaid, (byte)myData.pump.Id, ReservedCompleted, myData);
                    return;
                }
                myData.pump.AuthorizeAsync(myData.authParams, AuthPumpComplete, myData);
                return;
            }
            myData.ResultHandler?.Invoke(this, e);
        }

        public void ReservePump(byte pumpId, EventHandler<AsyncCompletedEventArgs> ResultHandler)
        {
            logger.Info("ReservePump, Trying to Reserve Pump:" + pumpId);
            FUSIONPump pumpToAuth = null;

            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.authAfterReserve = false;
            myData.ResultHandler = ResultHandler;
            myData.authParams = null;

            foreach (var p in this.forecourtControl.Pumps)
            {
                if (p.Id == pumpId)
                {
                    pumpToAuth = (FUSIONPump)p;
                    break;
                }
            }
            if (pumpToAuth == null)
            {
                logger.Info("Ingore the Request, Invalid Pump Id");
                if (ResultHandler != null)
                {
                    var e = new AsyncCompletedEventArgs(false, myData);
                    ResultHandler.Invoke(this, e);
                }
                return;
            }
            myData.pump = pumpToAuth;

            pumpToAuth.ReserveAsync(FuellingType.OptCardPaid, pumpId, ReservedCompleted, myData);
        }

        public void UnAuthorizePump(int pumpId, EventHandler<AsyncCompletedEventArgs> ResultHandler)
        {
            logger.Info("UnAuthorizePump, Trying to UnAuth Pump:" + pumpId);
            FUSIONPump pumpToUnAuth = null;
            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.authAfterReserve = false;
            myData.ResultHandler = ResultHandler;
            myData.authParams = null;
            foreach (var p in this.forecourtControl.Pumps)
            {
                if (p.Id == pumpId /*&& p.State == PumpState.Authorized*/)
                {
                    pumpToUnAuth = (FUSIONPump)p;
                    break;
                }
            }
            if (pumpToUnAuth == null)
            {
                logger.Info("Ingore the Request, haven't get the pump required");
                if (ResultHandler != null)
                {
                    AsyncCompletedEventArgs e = new AsyncCompletedEventArgs(false, myData);

                    ResultHandler.Invoke(this, e);
                }
                return;
            }
            if (pumpToUnAuth.State == PumpState.Authorized)
            {
                myData.pump = pumpToUnAuth;
                pumpToUnAuth.UnreserveAsync(UnReserveComplete, myData);

                Thread.Sleep(300);
                pumpToUnAuth.UnauthorizeAsync(UnAuthorizePumpComplete, myData);
                return;
            }

            ResultHandler?.Invoke(this, new AsyncCompletedEventArgs(true, myData));

        }

        public void UnReservePump(int pumpId)
        {
            logger.Info("Unreserve the pump");
            FUSIONPump pumpToUnReserve = null;
            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.authAfterReserve = false;
            myData.ResultHandler = null;
            myData.authParams = null;
            foreach (var p in this.forecourtControl.Pumps)
            {
                if (p.Id == pumpId && p.State == PumpState.Authorized)
                {
                    pumpToUnReserve = (FUSIONPump)p;
                    break;
                }
            }
            if (pumpToUnReserve == null)
            {
                logger.Info("Ingore the Unreserve Request, Invalid Pump Id");
                return;
            }
            myData.pump = pumpToUnReserve;
            pumpToUnReserve.UnreserveAsync(UnReserveComplete, myData);
        }

        public void GetTotalizer(int pumpId, EventHandler<AsyncCompletedEventArgs<PumpAccumulatorReading>> resultHandler)
        {
            logger.Info("GetTotalizer for Pump:" + pumpId);
            FUSIONPump targetPump = null;
            INozzle targetNozzle = null;
            foreach (var pump in this.forecourtControl.Pumps)
            {
                if (pump.Id == pumpId)
                {
                    targetPump = (FUSIONPump)pump;
                    break;
                }
            }

            if (targetPump == null)
            {
                logger.Info("Ingore the GetTotalizer Request, Invalid Pump Id");
                return;
            }

            var myData = new MyData();
            myData.pumpId = pumpId;
            myData.TotalizerEventHandler = resultHandler;
            targetPump.Nozzles.First().ReadPumpAccumulatorAsync(PumpAccumulatorRead, myData);
        }

        private void PumpAccumulatorRead(object sender, AsyncCompletedEventArgs<PumpAccumulatorReading> e)
        {
            logger.Info("Totalizer response");

            if (!e.Success)
                logger.Info("Failed to get totalizer");

            var myData = e.UserToken as MyData;
            if (myData != null && myData.TotalizerEventHandler != null)
                myData.TotalizerEventHandler(this, e);
        }

        private void UnAuthorizePumpComplete(object sender, AsyncCompletedEventArgs e)
        {
            var myData = (MyData)e.UserToken;
            logger.Info("UnAuth Pump Cpmplete, Result:" + e.Success + " PumpId" + myData.pump.Id);
            myData.ResultHandler?.Invoke(this, e);
        }

        private void ReservedCompleted(object sender, AsyncCompletedEventArgs e)
        {
            logger.Info("Reserve Pump Result:" + e.Success);
            var myData = (MyData)e.UserToken;
            if (e.Success && myData.authParams != null && myData.authAfterReserve)
            {
                myData.pump.AuthorizeAsync(myData.authParams, AuthPumpComplete, myData);
            }
            else
            {
                myData.ResultHandler?.Invoke(this, e);
            }
        }

        private void RoundingPrepareCompleted(object sender, AsyncCompletedEventArgs e)
        {
            logger.Info("Rounding fuelling Result:" + e.Success);
            var myData = (MyData)e.UserToken;
            if (e.Success && myData.authParams != null && myData.authAfterReserve)
            {
                myData.pump.AuthorizeAsync(myData.authParams, RoundingResultComplete, myData);
            }
            else
            {
                myData.ResultHandler?.Invoke(this, e);
            }
        }

        private void AuthPumpComplete(object sender, AsyncCompletedEventArgs<long> e)
        {
            var myData = (MyData)e.UserToken;
            logger.Info("AuthPumpComplete, result:" + e.Success + " PumpId" + myData.pump.Id);
            myData.pump.UnreserveAsync(UnReserveComplete, myData);

            if (e.Success)
            {
                //myData.pump.UnreserveAsync(UnReserveComplete, myData);
            }
            else
            {
                logger.Info("Failed to Authorize Pump");
            }
            myData.ResultHandler?.Invoke(this, e);
        }

        private void RoundingResultComplete(object sender, AsyncCompletedEventArgs<long> e)
        {
            var myData = (MyData)e.UserToken;
            logger.Info("AuthPumpComplete, result:" + e.Success + " PumpId" + myData.pump.Id);
            myData.pump.UnreserveAsync(UnReserveComplete, myData);

            if (e.Success)
            {
                //myData.pump.UnreserveAsync(UnReserveComplete, myData);
            }
            else
            {
                logger.Info("Failed to Authorize Pump");
            }
            myData.ResultHandler?.Invoke(this, e);
        }

        private void UnReserveComplete(object sender, AsyncCompletedEventArgs e)
        {
            var myData = (MyData)e.UserToken;
            logger.Info("UnReserveComplete, result:" + e.Success + " PumpId" + myData.pump.Id);
            if (e.Success)
            {

            }
            else
            {
                logger.Info("Failed to UnReserve Pump");
            }
        }

        private void ClearFuelSale(IFuelling fueling)
        {
            //fueling.ReserveAsync((a, b) =>
            //{
            //    if (b.Success)
            //    {
            //        scannerLogger.Info(string.Format("Fuel sale locked successfully, will trying to Clear, SeqNO = {0}", fueling.FuellingSequenceNumber));
            //        fueling.SetAsPaidAsync((c, d) =>
            //        {
            //            if (d.Success)
            //            {
            //                scannerLogger.Info(string.Format("Fuel sale paid successfully, SeqNO = {0}", fueling.FuellingSequenceNumber));
            //            }
            //            else
            //            {
            //                scannerLogger.Info(string.Format("Fuel sale paid failed, SeqNO = {0}", fueling.FuellingSequenceNumber));
            //            }
            //        }, fueling);
            //    }
            //    else
            //    {
            //        scannerLogger.Info(string.Format("Fuel sale locked failed, will not clear, SeqNO = {0}", fueling.FuellingSequenceNumber));
            //    }
            //}, fueling);
        }

        public void Dispose()
        {
            this.forecourtControl.Dispose();
        }

    }



}