using Edge.Core.Parser.BinaryParser.Util;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;

namespace VeederRoot_ATG_Console.MessageEntity.Incoming
{
    /// <summary>
    /// i|I201
    /// </summary>
    public class QueryInTankInventoryReportResponse : IncomingMessageBase
    {
        public DateTime? CurrentDateAndTime
        {
            get
            {
                if (base.FunctionCode.Item1 == MessageFormat.Display)
                    return null;
                return DateTime.ParseExact(
                    Encoding.ASCII.GetString(base.DataFieldAndOptionalCheckSumAndETX.Take(10).ToArray()),
                    "yyMMddHHmm", CultureInfo.InvariantCulture);
            }
        }

        public int? TankNumberInFunctionCode
        {
            get
            {
                if (base.FunctionCode.Item1 == MessageFormat.Display)
                    return null;
                var r = int.Parse(base.FunctionCode.Item3);
                return r;
            }
        }

        public List<InventoryData> InventoryDatas
        {
            get
            {
                // skip 10 bytes of current date and time
                var rawDataBody = base.DataFieldAndOptionalCheckSumAndETX.Skip(10)
                    //and exclude tail of -> && + 4 bytes check sum + ETX <- which is total 7 bytes.
                    .Take(base.DataFieldAndOptionalCheckSumAndETX.Count - 10 - 7);

                /* 
                 * TT - Tank Number (Decimal, 00=all)       - 2 bytes
                 * p - Product Code (one ASCII character [20h-7Eh])     - 1 bytes
                 * ssss - Tank Status Bits      - 4 bytes
                 * NN - Number of eight character Data Fields to follow (Hex)       - 2 bytes
                 * 
                 * ABOVE TOTAL LEN IS 9
                 */
                var datas = new List<InventoryData>();
                int previousTotalDataCount = 0;
                while (true)
                {
                    var buffer = rawDataBody.Skip(previousTotalDataCount);
                    if (buffer.Count() < 7)
                        throw new ArgumentException("Min bytes count for describe an i201 tank report is 7, but now is " + buffer.Count());
                    var numberOfEightCharDataFieldsValue
                        = int.Parse(Encoding.ASCII.GetString(buffer.Skip(7).Take(2).ToArray()));
                    if (numberOfEightCharDataFieldsValue < 1 || numberOfEightCharDataFieldsValue > 99)
                        throw new ArgumentException("number Of Eight Char DataFields to follow must range from 1 to 99, but now is: " + numberOfEightCharDataFieldsValue);
                    datas.Add(new InventoryData(
                        buffer.Take(7 + 2 + 8 * numberOfEightCharDataFieldsValue).ToArray()));
                    previousTotalDataCount += 7 + 2 + 8 * numberOfEightCharDataFieldsValue;
                    if (previousTotalDataCount == rawDataBody.Count()) break;
                }

                return datas;
            }
        }

        public override string ToLogString()
        {
            if (base.FunctionCode.Item1 == MessageFormat.Display)
                return Encoding.ASCII.GetString(base.DataFieldAndOptionalCheckSumAndETX.ToArray());
            return this.GetType().Name + "   Current DateTime: " + this.CurrentDateAndTime.Value.ToString("yyyy-MM-dd HH:mm")
                + ", TankNumber_InFunctionCode: " + this.TankNumberInFunctionCode
                + ", data: " + this.InventoryDatas.Select(d => d.ToFullLogString())
                    .Aggregate((acc, n) => acc + " || " + n);
        }

        public class InventoryData
        {
            private byte[] bytes;

            public enum TankState
            {
                DeliveryInProgress_LSB,
                LeakTestInProgress,
                InvalidFuelHeighAlarm_MagProbesOnly,
                Unknown,
            }

            public enum TankReadingDataName
            {
                Volume = 1,
                TC_Volume = 2,
                Ullage = 3,
                Height = 4,
                Water = 5,
                Temperature = 6,
                WaterVolume = 7,
            }

            public InventoryData(byte[] bytes)
            {
                this.bytes = bytes;
            }


            public int? TankNumber
            {
                get
                {
                    var r = int.Parse(Encoding.ASCII.GetString(this.bytes.Take(2).ToArray()));
                    return r;
                }
            }

            public char? ProductCode
            {
                get
                {
                    return
                        Encoding.ASCII.GetString(
                            this.bytes.Skip(2).Take(1).ToArray())[0];
                }
            }

            public List<TankState> States
            {
                get
                {
                    /* 4 ascii encoded bytes, 
                     * check 16 bits to get the states
                     * say now the raw data here is: 0x30,0x30,0x30,0x39
                     * then target byte here is the last byte of value 9 which binary format is 0000 1001.
                     * so is bit 0 is 1, indicates the TankState.DeliveryInProgress_LSB
                     */
                    var states = new List<TankState>();
                    var tankStateBit = Util.ConvertHexBcdStrToBytes(this.bytes.Skip(3).Take(4).ToArray());
                    if (tankStateBit.Last().GetBit(0) == 1)
                        states.Add(TankState.DeliveryInProgress_LSB);
                    if (tankStateBit.Last().GetBit(1) == 1)
                        states.Add(TankState.LeakTestInProgress);
                    if (tankStateBit.Last().GetBit(2) == 1)
                        states.Add(TankState.InvalidFuelHeighAlarm_MagProbesOnly);
                    return states;
                }
            }

            public int? NumberOfEightCharDataFieldsToFollow
            {
                get
                {
                    var nn = int.Parse(Encoding.ASCII.GetString(this.bytes.Skip(7).Take(2).ToArray()));
                    //this.QueryInTankInventoryReportDatas = new List<QueryInTankInventoryReportDataField>(nn);
                    return nn;
                }
            }

            public Dictionary<TankReadingDataName, double> TankReadingDatas
            {
                get
                {
                    var datas = new Dictionary<TankReadingDataName, double>();
                    for (int i = 0; i < this.NumberOfEightCharDataFieldsToFollow.Value; i++)
                    {
                        var asciiEncodedBytes = Util.ConvertHexBcdStrToBytes(this.bytes.Skip(9 + 8 * i).Take(8).ToArray());
                        var dataValue =
                            Util.ConvertIEEEWith4BytesToDouble(asciiEncodedBytes.ToArray());
                        switch (i + 1)
                        {
                            case 1: // VOLUME
                                datas.Add(TankReadingDataName.Volume, dataValue);
                                break;
                            case 2: // TC VOLUME
                                datas.Add(TankReadingDataName.TC_Volume, dataValue);
                                break;
                            case 3: // ULLAGE
                                datas.Add(TankReadingDataName.Ullage, dataValue);
                                break;
                            case 4: // HEIGHT
                                datas.Add(TankReadingDataName.Height, dataValue);
                                break;
                            case 5: // WATER HEIGHT
                                datas.Add(TankReadingDataName.Water, dataValue);
                                break;
                            case 6: // TEMPERATURE
                                datas.Add(TankReadingDataName.Temperature, dataValue);
                                break;
                            case 7: // WATER VOLUME
                                datas.Add(TankReadingDataName.WaterVolume, dataValue);
                                break;
                        }
                    }

                    return datas;
                }
            }

            public string ToFullLogString()
            {
                return "Tank with Number: " + (this.TankNumber ?? -1) + " with ProductCode: " + (this.ProductCode ?? ' ')
                        + " with States: " +
                            (this.States != null && this.States.Any() ? this.States.Select(s => s.ToString()).Aggregate((acc, n) => acc + "-" + n) : "")
                        + ", data read: "
                        + this.TankReadingDatas.Select(s => s.Key.ToString() + "-" + s.Value).Aggregate((acc, n) => acc + " | " + n);
            }

            public string ToSimpleLogString()
            {
                return "Tank with Number: " + (this.TankNumber ?? -1) + " has ProductCode: " + (this.ProductCode ?? ' ');
            }
        }
    }
}