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 Edge.Core.Processor;
using Edge.Core.IndustryStandardInterface.Pump;
using Wayne.FDCPOSLibrary;
using System.Xml;
using Edge.Core.Database.Models;
using System.Threading.Tasks;
using Edge.Core.Processor.Communicator;
using Edge.Core.Processor.Dispatcher.Attributes;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using Stateless;
using Microsoft.Extensions.DependencyInjection;

namespace Gilbarco_Pump
{
    public class StatePumpHandler : IFdcPumpController//, IDeviceHandler<byte[], MessageTemplateBase>
    {
        private IServiceProvider services;
        private IContext<byte[], MessageTemplateBase> context;
        private ILogger logger = NullLogger.Instance;
        private PumpGroupHandler parent;
        private LogicalDeviceState currentState = LogicalDeviceState.FDC_OFFLINE;

        public event EventHandler<FdcPumpControllerOnStateChangeEventArg> OnStateChange;
        /// <summary>
        /// fired on fueling process is on going, the fuel amount should keep changing.
        /// </summary>
        public event EventHandler<FdcTransactionDoneEventArg> OnCurrentFuellingStatusChange;

        StateMachine<LogicalDeviceState, Trigger> stateless
            = new StateMachine<LogicalDeviceState, Trigger>(LogicalDeviceState.FDC_OFFLINE);

        protected List<LogicalNozzle> nozzles;

        public IEnumerable<LogicalNozzle> Nozzles => this.nozzles;
        protected enum Trigger
        {
            //AnyPumpMsgReceived,
            AnyPumpMsgHaveNotReceivedForWhile,
            NozzleLifted_And_开机,
            NozzleLifted_And_停机,
            NozzleReplaced_And_开机,
            NozzleReplaced_And_停机,
            NozzleFuelNumbersIsRunning,
            //PumpAuthorizedByFC,
        }
        public int AmountDecimalDigits => 2;

        public int VolumeDecimalDigits => 2;

        public int PriceDecimalDigits => 2;

        public int VolumeTotalizerDecimalDigits => 2;

        /// <summary>
        /// </summary>
        public int PumpId { get; private set; }

        /// <summary>
        /// will set it to 油机端的配置值,枪号为以整个加油站为基础的油枪顺序编号, 就是全站枪号
        /// </summary>
        public int PumpPhysicalId { get; private set; }

        public string Name => "ZhongSheng_NonIC_Pump";

        /// <summary>
        /// 每把枪就是一个Pump即一个加油点
        /// </summary>
        /// <param name="pumpId"></param>
        /// <param name="dispenserSideNozzleId">油机端的配置值,枪号为以整个加油站为基础的油枪顺序编号, 就是全站枪号？</param>
        public StatePumpHandler(PumpGroupHandler parent, byte pumpId,
            byte dispenserSideNozzleId, IServiceProvider services)
        {
            this.parent = parent;
            this.services = services;
            var loggerFactory = services.GetRequiredService<ILoggerFactory>();
            this.logger = loggerFactory.CreateLogger("PumpHandler");
            this.PumpId = pumpId;
            this.PumpPhysicalId = dispenserSideNozzleId;
            //每把枪就是一个Pump即一个加油点
            this.nozzles = new List<LogicalNozzle>() { new LogicalNozzle(pumpId, dispenserSideNozzleId, 1, null) };
        }

        internal void TriggerPumpOffline()
        {
            if (this.currentState != LogicalDeviceState.FDC_OFFLINE)
            {
                this.currentState = LogicalDeviceState.FDC_OFFLINE;
                this.OnStateChange?.Invoke(this, new FdcPumpControllerOnStateChangeEventArg(LogicalDeviceState.FDC_OFFLINE));
            }
        }

        public void Init(IContext<byte[], MessageTemplateBase> context)
        {
            this.context = context;
        }

        public async Task Process(IContext<byte[], MessageTemplateBase> context)
        {
            this.context = context;
        }

        public virtual async Task<LogicalDeviceState> QueryStatusAsync()
        {
            return this.currentState;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns>MoneyTotalizer:VolumnTotalizer</returns>
        public async Task<Tuple<int, int>> QueryTotalizerAsync(byte logicalNozzleId)
        {
            var result = new System.Tuple<int, int>(-1, -1);
            logger.LogDebug("Pump: " + this.PumpId + ", " + "Start QueryTotalizer pump with logical nozzle: " + logicalNozzleId);
            return result;
        }


        public virtual async Task<bool> ChangeFuelPriceAsync(int newPriceWithoutDecimalPoint, byte logicalNozzleId)
        {
            logger.LogDebug("Pump: " + this.PumpId + ", " + "start ChangeFuelPriceAsync pump with nozzle: " + logicalNozzleId);
            return false;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="logicalNozzleId">useless for this type of pump, it always one pump one nozzle</param>
        /// <returns></returns>
        public virtual async Task<bool> AuthorizeAsync(byte logicalNozzleId)
        {
            logger.LogDebug("Pump: " + this.PumpId + ", " + "start AuthorizeAsync pump with nozzle: " + 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 virtual async Task<bool> AuthorizeWithAmountAsync(int moneyAmountWithoutDecimalPoint, byte logicalNozzleId)
        {
            logger.LogDebug("Pump: " + this.PumpId + ", " + "start AuthorizeWithAmountAsync pump with amount: " + moneyAmountWithoutDecimalPoint + ", nozzle: " + logicalNozzleId);
            return false;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="volumnWithoutDecimalPoint"></param>
        /// <param name="logicalNozzleId">useless for this type of pump, it always one pump one nozzle</param>
        /// <returns></returns>
        public virtual async Task<bool> AuthorizeWithVolumeAsync(int volumnWithoutDecimalPoint, byte logicalNozzleId)
        {
            logger.LogDebug("Pump: " + this.PumpId + ", " + "start AuthorizeWithVolumeAsync pump with volume: " + volumnWithoutDecimalPoint + ", nozzle: " + logicalNozzleId);
            return false;
        }

        public virtual async Task<bool> FuelingRoundUpByAmountAsync(int amount)
        {
            throw new NotImplementedException();
        }

        #region not implemented

        public async Task<bool> UnAuthorizeAsync(byte logicalNozzleId)
        {
            logger.LogDebug("Pump: " + this.PumpId + ", " + "start UnAuthorizeAsync pump with nozzle: " + logicalNozzleId);
            return false;
        }

        public async Task<bool> SuspendFuellingAsync()
        {
            throw new NotImplementedException();
        }

        public async Task<bool> ResumeFuellingAsync()
        {
            throw new NotImplementedException();
        }

        public async Task<bool> FuelingRoundUpByVolumeAsync(int volume)
        { throw new NotImplementedException(); }

        #endregion

        /// <summary>
        /// </summary>
        protected Dictionary<byte, FuelSaleTransaction> logicalNozzleIdToLastFuelSaleTrxMapping = new Dictionary<byte, FuelSaleTransaction>();
        public void OnFdcServerInit(Dictionary<string, object> parameters)
        {
            if (parameters.ContainsKey("LastPriceChange"))
            {
            }

            /* Load Last sale(from db) for void the case of FC accidently disconnect from Pump in fueling,
             and may cause a fueling trx gone from FC control */
            if (parameters.ContainsKey("LastFuelSaleTrx"))
            {
                // nozzle logical id:lastSale
                //var lastFuelSaleTrxes = parameters["LastFuelSaleTrx"] as Dictionary<byte, FuelSaleTransaction>;
                //foreach (var lastFuelSaleTrx in lastFuelSaleTrxes)
                //{
                //    logger.Info("Pump: " + this.pumpId + ", OnFdcServerInit, load last fuel sale " +
                //        "on logical nozzle: " + lastFuelSaleTrx.Key + " with value: " + lastFuelSaleTrx.Value);
                //    this.logicalNozzleIdToLastFuelSaleTrxMapping.Remove(lastFuelSaleTrx.Key);
                //    this.logicalNozzleIdToLastFuelSaleTrxMapping.Add(lastFuelSaleTrx.Key, lastFuelSaleTrx.Value);
                //}
            }
        }

        public async Task<bool> LockNozzleAsync(byte logicalNozzleId)
        {
            return false;
        }

        public async Task<bool> UnlockNozzleAsync(byte logicalNozzleId)
        {
            return false;
        }
    }
}