using Edge.Core.IndustryStandardInterface.ATG;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;

namespace VeederRoot_ATG_Console.MessageEntity.Incoming
{
    /// <summary>
    /// i|I20C
    /// </summary>
    public class QueryInTankMostRecentDeliveryReportResponse : IncomingMessageBase
    {
        public int? TankNumberInFunctionCode
        {
            get
            {
                if (base.FunctionCode.Item1 == MessageFormat.Display)
                    return null;
                var r = int.Parse(base.FunctionCode.Item3);
                return r;
            }
        }

        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 List<DeliveriesForTank> DeliveriesForTanks
        {
            get
            {
                /* 2 layer nested structure */

                // 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);

                var datas = new List<DeliveriesForTank>();
                int previousTankElapsedByteCount = 0;
                while (true)
                {
                    var buffer = rawDataBody.Skip(previousTankElapsedByteCount);
                    if (!buffer.Any()) return datas;
                    /* 
                     * TT - Tank Number (Decimal, 00=all)       - 2 bytes
                     * p - Product Code (one ASCII character [20h-7Eh])     - 1 bytes
                     * dd - Number of Deliveries to follow (Decimal, 00 if no data available for this tank)     - 2 bytes
                     * 
                     * ABOVE TOTAL LEN IS fixed 5
                     */

                    //each tank section length is decided by a fixed length + variable length.

                    var noOfDeliversToFollow =
                        Util.ConvertHexBcdStrToBytes(buffer.Skip(3).Take(2).ToArray()).First();
                    int previousDeliveryElapsedByteCount = 0;
                    if (noOfDeliversToFollow == 0) { }
                    else
                    {
                        int deliveriesProcessed = 0;
                        //var deliveriesForTank = buffer.Skip(previousTankElapsedByteCount + 5);

                        while (true)
                        {
                            if (deliveriesProcessed == noOfDeliversToFollow) break;
                            var nextDelivery = buffer.Skip(5 + previousDeliveryElapsedByteCount + 10 + 10);
                            if (!nextDelivery.Any()) throw new ArgumentException("Empty bytes for continue parsing Delivery");
                            var numberOfEightCharDataFieldsValue
                                = Util.ConvertHexBcdStrToBytes(nextDelivery.Take(2).ToArray()).First();
                            previousDeliveryElapsedByteCount += 20 + 2 + numberOfEightCharDataFieldsValue * 8;
                            deliveriesProcessed++;
                        }
                    };
                    previousTankElapsedByteCount += 5 + previousDeliveryElapsedByteCount;
                    datas.Add(new DeliveriesForTank(
                             buffer.Take(previousDeliveryElapsedByteCount + 5).ToArray()));
                }
            }
        }

        public override string ToLogString()
        {
            return this.GetType().Name + "  Deliveries: " +
                        (DeliveriesForTanks != null && DeliveriesForTanks.Any() ?
                            DeliveriesForTanks.Select(d => d.ToLogString()).Aggregate((acc, n) => acc + "||" + n)
                            : "");
        }

        public class DeliveriesForTank
        {
            private byte[] bytes;

            /// <summary>
            /// 
            /// </summary>
            /// <param name="bytes">TankNumber(2 bytes) + ProductCode(1 byte) + NoOfDeliveries(2 bytes)+ 20+2+No*8</param>
            public DeliveriesForTank(byte[] bytes)
            {
                this.bytes = bytes;
            }

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

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

            public int? NumberOfDeliveriesToFollow
            {
                get
                {
                    var nn = Util.ConvertHexBcdStrToBytes(this.bytes.Skip(3).Take(2).ToArray()).First();
                    return nn;
                }
            }

            public List<Delivery> Deliveries
            {
                get
                {
                    if (this.NumberOfDeliveriesToFollow == 0) return null;
                    // exclude 5 bytes of TT + p + dd.
                    var loopParts = this.bytes.Skip(5);

                    var datas = new List<Delivery>();
                    int previousDeliveryByteCount = 0;
                    while (true)
                    {
                        var numberOfEightCharDataFieldsValue
                            = Util.ConvertHexBcdStrToBytes(
                                loopParts.Skip(previousDeliveryByteCount + 20).Take(2).ToArray()).First();
                        //if (numberOfEightCharDataFieldsValue < 1 || numberOfEightCharDataFieldsValue > 10)
                        //    throw new ArgumentException("number Of Eight Char DataFields to follow must range from 1 to 10, but now is: " + numberOfEightCharDataFieldsValue);
                        datas.Add(
                            new Delivery(this.TankNumber,
                                loopParts.Skip(previousDeliveryByteCount)
                                    .Take(10 + 10 + 2 + 8 * numberOfEightCharDataFieldsValue).ToArray()));
                        previousDeliveryByteCount += 10 + 10 + 2 + 8 * numberOfEightCharDataFieldsValue;
                        if (previousDeliveryByteCount == loopParts.Count()) break;
                    }

                    return datas;
                }
            }

            public string ToLogString()
            {
                return "Tank with Number: " + (this.TankNumber ?? -1) + " has ProductCode: " + (this.ProductCode ?? ' ')
                    + ", its NumberOfDeliveriesToFollow: " + (this?.NumberOfDeliveriesToFollow ?? 0)
                    + " and details-> " +
                        (Deliveries != null && Deliveries.Any() ?
                            Deliveries.Select(d => d.ToFullLogString()).Aggregate((acc, n) => acc + "||" + n)
                            : "");
            }
        }

        public class Delivery
        {
            //public enum ReadingDataName
            //{
            //    StartingVolume = 1,
            //    StartingTcVolume = 2,
            //    StartingWater = 3,
            //    StartingTemp = 4,
            //    EndingVolume = 5,
            //    EndingTcVolume = 6,
            //    EndingWater = 7,
            //    EndingTemp = 8,
            //    StartingHeight = 9,
            //    EndingHeight = 10,
            //}

            private byte[] bytes;
            public Delivery(int? tankNumber, byte[] bytes)
            {
                this.TankNumber = tankNumber;
                this.bytes = bytes;
            }

            public int? TankNumber { get; }

            public DateTime? StartingDateTime
            {
                get
                {
                    return DateTime.ParseExact(
                        Encoding.ASCII.GetString(this.bytes.Take(10).ToArray()),
                        "yyMMddHHmm", CultureInfo.InvariantCulture);
                }
            }

            public DateTime? EndingDateTime
            {
                get
                {
                    return DateTime.ParseExact(
                         Encoding.ASCII.GetString(this.bytes.Take(10).ToArray()),
                         "yyMMddHHmm", CultureInfo.InvariantCulture);
                }
            }

            public int? NumberOfEightCharDataFieldsToFollow
            {
                get
                {
                    var nn = Util.ConvertHexBcdStrToBytes(this.bytes.Skip(20).Take(2).ToArray()).First();
                    return nn;
                }
            }

            /// <summary>
            /// Get list of DelieveryReadingDataName:Value
            /// </summary>
            public Dictionary<DeliveryReadingDataName, double> Datas
            {
                get
                {
                    var datas = new Dictionary<DeliveryReadingDataName, double>();
                    for (int i = 0; i < this.NumberOfEightCharDataFieldsToFollow.Value; i++)
                    {
                        var asciiEncodedBytes = Util.ConvertHexBcdStrToBytes(this.bytes.Skip(20 + 2 + 8 * i).Take(8).ToArray());
                        var dataValue =
                            Util.ConvertIEEEWith4BytesToDouble(asciiEncodedBytes.ToArray());
                        switch (i + 1)
                        {
                            case 1: // Starting Volume
                                datas.Add(DeliveryReadingDataName.StartingVolume, dataValue);
                                break;
                            case 2: // Starting TC Volume
                                datas.Add(DeliveryReadingDataName.StartingTcVolume, dataValue);
                                break;
                            case 3: // Starting Water
                                datas.Add(DeliveryReadingDataName.StartingWater, dataValue);
                                break;
                            case 4: // Starting Temp
                                datas.Add(DeliveryReadingDataName.StartingTemp, dataValue);
                                break;
                            case 5: // Ending Volume
                                datas.Add(DeliveryReadingDataName.EndingVolume, dataValue);
                                break;
                            case 6: // Ending TC Volume
                                datas.Add(DeliveryReadingDataName.EndingTcVolume, dataValue);
                                break;
                            case 7: // Ending Water
                                datas.Add(DeliveryReadingDataName.EndingWater, dataValue);
                                break;
                            case 8: // Ending Temp
                                datas.Add(DeliveryReadingDataName.EndingTemp, dataValue);
                                break;
                            case 9: // Starting Height
                                datas.Add(DeliveryReadingDataName.StartingHeight, dataValue);
                                break;
                            case 10: // Ending Height
                                datas.Add(DeliveryReadingDataName.EndingHeight, dataValue);
                                break;
                            default:
                                // by seeing the real data from console, it may still hit here
                                // the reason is the "Number of eight character Data Fields to follow (Hex)" > 10.
                                // and meanwhile, extra bytes will be send in, may the VeederRoot leave it for extention
                                // in future?
                                break;
                        }
                    }

                    return datas;
                }
            }

            public string ToFullLogString()
            {
                return "DeliveryDetail  StartingDateTime: " + (this?.StartingDateTime?.ToString("yyMMddHHmm") ?? "")
                    + ", EndingDateTime: " + (this?.EndingDateTime?.ToString("yyMMddHHmm") ?? "")
                        + ", data(ReadingData:Value)-> "
                        + this.Datas.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 ?? ' ');
            //}
        }
    }


}