using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Configuration;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading;
using Timer = System.Timers.Timer;
using System.Collections;
using HengShan_Pump_NonIC.MessageEntity;
using Edge.Core.Processor;using Edge.Core.IndustryStandardInterface.Pump;
using Wayne.FDCPOSLibrary;
using System.Xml;
using Edge.Core.Database.Models;
using System.Threading.Tasks;

namespace HengShan_Pump_NonIC
{
    /// <summary>
    /// this is kind of HS non IC pump that have a build-in auto auth self function by hardware, so outside(fcc) can't auth it, it's 
    /// a 'lift nozzle, and fueling pump'.
    /// basically it only have 2 states:
    /// idle:      不允许加油--加油结束--油枪关--电机关--D30--D20--金额加油
	/// fueling:   允许加油--加油过程--油枪打开--电机打开--D30--D20--金额加油
    /// </summary>
    public class PumpHandlerForSelfAuthPump : PumpHandler
    {
        private object syncObject = new object();

        // by seconds, change this value need change the correlated deviceOfflineCountdownTimer's interval as well
        private const int lastLogicalDeviceStateExpiredTime = 3;
        private DateTime lastLogicalDeviceStateReceivedTime;
        private System.Timers.Timer deviceOfflineCountdownTimer;

        //static ILog fdcLogger = log4net.LogManager.GetLogger("FdcServer");
        //static ILog logger = log4net.LogManager.GetLogger("PumpHandler");
        static NLog.Logger logger = NLog.LogManager.LoadConfiguration("nlog.config").GetLogger("PumpHandler");



        /// <summary>
        /// 恒山非IC油机
        /// </summary>
        /// <param name="pumpId"></param>
        /// <param name="nozzlesXmlConfiguration"></param>
        public PumpHandlerForSelfAuthPump(int pumpId, string nozzlesXmlConfiguration) : base(pumpId, nozzlesXmlConfiguration)
        {
            logger.Info("Pump: " + this.PumpId + ",     PumpHandlerForSelfAuthPump");
            this.deviceOfflineCountdownTimer = new System.Timers.Timer(1000);
            this.deviceOfflineCountdownTimer.Elapsed += (_, __) =>
            {
                if (DateTime.Now.Subtract(this.lastLogicalDeviceStateReceivedTime).TotalSeconds
                    >= lastLogicalDeviceStateExpiredTime)
                {
                    //if (this.lastLogicalDeviceState != LogicalDeviceState.FDC_OFFLINE)
                    //{
                    //    this.lastLogicalDeviceState = LogicalDeviceState.FDC_OFFLINE;
                    logger.Info("Pump: " + this.PumpId + ", " + "      seems offline due to long time no see pump data incoming");
                    //    var safe0 = this.OnStateChange;
                    //    safe0?.Invoke(this, new FdcPumpControllerOnStateChangeEventArg(LogicalDeviceState.FDC_OFFLINE, null));
                    //    logger.Trace("Pump: " + this.pumpId + ", " + "      OnStateChange event fired and back");
                    //}
                }
            };
            this.deviceOfflineCountdownTimer.Start();
        }


        public override async Task Process(IContext<byte[], NonICMessageTemplateBase> context)
        {
            if (!isOnFdcServerInitCalled) return;
            this.lastLogicalDeviceStateReceivedTime = DateTime.Now;
            this.context = context;
            if (context.Incoming.Message is GetNozzleStatusResponse getNozzleStatusResponse)
            {
                //this.isSafeForSend = true;

                this.lastLogicalDeviceStateReceivedTime = DateTime.Now;
                //var getNozzleStatusResponse = context.Incoming.Message as GetNozzleStatusResponse;

                // put the price by reading the real price.
                this.nozzles.First().RealPriceOnPhysicalPump = getNozzleStatusResponse.单价;

                var latestStatus = getNozzleStatusResponse.GetPumpStatus();

                if (latestStatus.Any(f => f == GetNozzleStatusResponse.PumpStatus.允许加油)
                    && latestStatus.Any(f => f == GetNozzleStatusResponse.PumpStatus.油枪打开)
                    && latestStatus.Any(f => f == GetNozzleStatusResponse.PumpStatus.加油过程)
                    && latestStatus.Any(f => f == GetNozzleStatusResponse.PumpStatus.电机打开))
                {

                    /* 正处于加油状态下 */

                    if (this.previousUnfinishedFuelingNozzleStatus != null
                        && this.previousUnfinishedFuelingNozzleStatus.流水号 != getNozzleStatusResponse.流水号)
                    {
                        logger.Info("Pump: " + this.PumpId + ", " + "Detected a fast put back and pull out nozzle case(action time < polling time cause nozzle place back not detected)," +
                               "\r\n will fire the trx done event for earlier trx(may have volume/money data loss!!!) with most recoverable data(most likely a bit less than real)->\r\n "
                               + "seqNo: " + this.previousUnfinishedFuelingNozzleStatus.流水号
                               + ", amount: " + this.previousUnfinishedFuelingNozzleStatus.加油金额
                               + ", volume: " + this.previousUnfinishedFuelingNozzleStatus.加油量
                               + ", price: " + this.previousUnfinishedFuelingNozzleStatus.单价);
                        logger.Info("Pump: " + this.PumpId + ", " + "      State switched to FDC_READY(simulate)");
                        this.lastLogicalDeviceState = LogicalDeviceState.FDC_READY;
                        this.FireOnStateChangeEvent(LogicalDeviceState.FDC_READY);

                        var previousFuelingAmount = this.previousUnfinishedFuelingNozzleStatus.加油金额;
                        var previousFuelingVol = this.previousUnfinishedFuelingNozzleStatus.加油量;
                        var previousPrice = this.previousUnfinishedFuelingNozzleStatus.单价;
                        var previousSeqNo = this.previousUnfinishedFuelingNozzleStatus.流水号;
                        if (this.logicalNozzleIdToLastFuelSaleTrxMapping.ContainsKey(1))
                            this.logicalNozzleIdToLastFuelSaleTrxMapping[1] = new FuelSaleTransaction()
                            {
                                TransactionSeqNumberFromPhysicalPump = this.previousUnfinishedFuelingNozzleStatus.流水号.ToString()
                            };
                        else
                            this.logicalNozzleIdToLastFuelSaleTrxMapping.Add(1, new FuelSaleTransaction()
                            {
                                TransactionSeqNumberFromPhysicalPump = this.previousUnfinishedFuelingNozzleStatus.流水号.ToString()
                            });

                        //ThreadPool.QueueUserWorkItem(o =>
                        //{
                        var totalizer = await base.QueryTotalizerAsync(1);
                        this.FireOnCurrentFuellingStatusChangeEvent(new FdcTransaction()
                        {
                            // use previousUnfinishedFuelingNozzleStatus could miss reading the last trx correct numbers(less than actual number)
                            //, obviously this is caused by pump hardware design, impossible to recovery it back by our application.
                            Nozzle = this.nozzles.First(),
                            Amount = previousFuelingAmount,
                            Volumn = previousFuelingVol,
                            Price = previousPrice,
                            SequenceNumberGeneratedOnPhysicalPump = previousSeqNo,
                            AmountTotalizer = totalizer.Item1,
                            VolumeTotalizer = totalizer.Item2,
                            Finished = true,
                        });
                        //});
                    }

                    this.previousUnfinishedFuelingNozzleStatus = getNozzleStatusResponse;

                    if (this.lastLogicalDeviceState != LogicalDeviceState.FDC_FUELLING)
                    {
                        //status code: B1
                        logger.Debug("Pump: " + this.PumpId + ", " + "收到新状态: 处于加油状态下");
                        logger.Debug("Pump: " + this.PumpId + ", " + "      State switched to FDC_CALLING(by simulate)");
                        this.lastLogicalDeviceState = LogicalDeviceState.FDC_CALLING;
                        base.FireOnStateChangeEvent(LogicalDeviceState.FDC_CALLING);

                        logger.Debug("Pump: " + this.PumpId + ", " + "      State switched to FDC_FUELLING(流水号: " + getNozzleStatusResponse.流水号 + ")");
                        this.lastLogicalDeviceState = LogicalDeviceState.FDC_FUELLING;
                        base.FireOnStateChangeEvent(LogicalDeviceState.FDC_FUELLING);
                    }

                    logger.Debug("Pump: " + this.PumpId + ", " + "   fueling in progress with amt: " + getNozzleStatusResponse.加油金额
                        + ", vol: " + getNozzleStatusResponse.加油量 + ", seq: " + getNozzleStatusResponse.流水号);

                    //fire fuelling progress.
                    base.FireOnCurrentFuellingStatusChangeEvent(new FdcTransaction()
                    {
                        // 恒山油机只有一把枪
                        Nozzle = this.nozzles.First(),
                        Amount = getNozzleStatusResponse.加油金额,
                        Volumn = getNozzleStatusResponse.加油量,
                        Price = getNozzleStatusResponse.单价,
                        SequenceNumberGeneratedOnPhysicalPump = getNozzleStatusResponse.流水号,
                        Finished = false,
                    });
                }
                else if (latestStatus.Any(f => f == GetNozzleStatusResponse.PumpStatus.不允许加油)
                    && latestStatus.Any(f => f == GetNozzleStatusResponse.PumpStatus.加油结束))
                {
                    /* 油机首次上电也会进入此处，并不断发送上一次的加油记录,这种情况下的交易记录并无法判断其之前是否已经发送至上层系统（比如是否已经存入数据库），
                     所以此处不判断而是往上层系统里送入，由系统判断重复情况。   而其它正常加油过程中的交易记录仅在油机状态变化时才送入系统。*/
                    // status code: 40

                    this.previousUnfinishedFuelingNozzleStatus = null;
                    if (this.lastLogicalDeviceState != LogicalDeviceState.FDC_READY)
                    {
                        logger.Info("Pump: " + this.PumpId + ", " + "收到新状态: 加油结束(seq No.: " + getNozzleStatusResponse.流水号.ToString() + ")");
                        logger.Info("Pump: " + this.PumpId + ", " + "      State switched to FDC_READY");
                        lastLogicalDeviceState = LogicalDeviceState.FDC_READY;
                        base.FireOnStateChangeEvent(LogicalDeviceState.FDC_READY);

                        // zero trx, do nothing.
                        if (getNozzleStatusResponse.加油量 == 0 || getNozzleStatusResponse.加油金额 == 0)
                        {
                            logger.Debug("Pump: " + this.PumpId + ", " + "0 amount trx, will ignore");
                            return;
                        }

                        // repeat received last fuel sale message, do nothing.
                        if (base.logicalNozzleIdToLastFuelSaleTrxMapping.ContainsKey(1)
                                && base.logicalNozzleIdToLastFuelSaleTrxMapping[1].TransactionSeqNumberFromPhysicalPump
                                        == getNozzleStatusResponse.流水号.ToString())
                        {
                            logger.Info("Pump: " + this.PumpId + ", fuel trx seq No. have NOT changed(previous seq No.: "
                                + base.logicalNozzleIdToLastFuelSaleTrxMapping[1].TransactionSeqNumberFromPhysicalPump + "), will ignore");
                            return;
                        }

                        // lastSale exists and 流水号 diff
                        if (base.logicalNozzleIdToLastFuelSaleTrxMapping.ContainsKey(1)
                                && base.logicalNozzleIdToLastFuelSaleTrxMapping[1].TransactionSeqNumberFromPhysicalPump
                                    != getNozzleStatusResponse.流水号.ToString())
                        {
                            logger.Info("Pump: " + base.PumpId
                                + ",       Detect a fule trx with 流水号: " + getNozzleStatusResponse.流水号 + " which is diff from previous fule trx(previous 流水号:" +
                                this.logicalNozzleIdToLastFuelSaleTrxMapping[1].TransactionSeqNumberFromPhysicalPump + "), will generate a new fule sale trx with vol: " + getNozzleStatusResponse.加油量);
                            this.logicalNozzleIdToLastFuelSaleTrxMapping[1] = new FuelSaleTransaction() { TransactionSeqNumberFromPhysicalPump = getNozzleStatusResponse.流水号.ToString() };
                        }

                        // lastSale not exists
                        if (!this.logicalNozzleIdToLastFuelSaleTrxMapping.ContainsKey(1))
                        {
                            logger.Info("Pump: " + base.PumpId + ",       very first initial trx detected on this pump, will generate a new fule sale trx(seq: " + getNozzleStatusResponse.流水号 + ", vol: " + getNozzleStatusResponse.加油量 + ", amt: " + getNozzleStatusResponse.加油金额 + ")");
                            this.logicalNozzleIdToLastFuelSaleTrxMapping.Add(1, new FuelSaleTransaction() { TransactionSeqNumberFromPhysicalPump = getNozzleStatusResponse.流水号.ToString() });
                        }

                        var amount = getNozzleStatusResponse.加油金额;
                        var fuelingVol = getNozzleStatusResponse.加油量;
                        var price = getNozzleStatusResponse.单价;
                        var seqNo = getNozzleStatusResponse.流水号;
                        logger.Info("Pump: " + base.PumpId + ",       fire trx done with amt: " + amount + ", vol: " + fuelingVol
                                + ", price: " + price + ", seq No.: " + seqNo);
                        //ThreadPool.QueueUserWorkItem(o =>
                        //{
                        var totalizer = await this.QueryTotalizerAsync(1);
                        base.FireOnCurrentFuellingStatusChangeEvent(new FdcTransaction()
                        {
                            // 恒山油机 一个加油点只有一把枪
                            Nozzle = this.nozzles.First(),
                            Amount = amount,
                            Volumn = fuelingVol,
                            Price = price,
                            SequenceNumberGeneratedOnPhysicalPump = seqNo,
                            AmountTotalizer = totalizer.Item1,
                            VolumeTotalizer = totalizer.Item2,
                            Finished = true,
                        });
                        //});
                    }
                }
                else
                {
                    if (logger.IsTraceEnabled)
                        logger.Trace("Unhandled GetNozzleStatusResponse is incoming: " + getNozzleStatusResponse.ToLogString());
                }
            }
            else
            {
               await base.Process(context);
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="logicalNozzleId">useless for this type of pump, it always one pump one nozzle</param>
        /// <returns></returns>
        public override async Task<bool> AuthorizeAsync(byte logicalNozzleId)
        {
            return false;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="moneyAmount"></param>
        /// <param name="logicalNozzleId">useless for this type of pump, it always one pump one nozzle</param>
        /// <returns></returns>
        public override async Task<bool> AuthorizeWithAmountAsync(int moneyAmount, byte logicalNozzleId)
        {
            return false;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="volume"></param>
        /// <param name="logicalNozzleId">useless for this type of pump, it always one pump one nozzle</param>
        /// <returns></returns>
        public override async Task<bool> AuthorizeWithVolumeAsync(int volumn, byte logicalNozzleId)
        {
            return false;
        }
    }
}