using Edge.Core.Parser.BinaryParser.Attributes;
using Edge.Core.Parser.BinaryParser.Util;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ZhongSheng_NonIC_Pump
{
    /// <summary>
    /// the manufactor of the dispenser send me an updated protocol that only this message updated,
    /// during the my developing.
    ///     just in case, keep this old format message entity here.
    ///  加油实时数据命令格式和错误状态信息格式:
    ///     （实时信息有时会一条枪有时会多条枪，每条枪用一个信息块表示）
    /// </summary>
    public class PumpInOperationResponse_OldVersion : MessageTemplateBase
    {
        private List<byte> dataRaw;
        private IEnumerable<FuellingDataBlock> fuellingDataBlocks;
        private IEnumerable<PumpStateBlock_OldVersion> pumpStateBlocks;
        /// <summary>
        /// </summary>
        [EnumerableFormat("%cascade", 1, EncodingType = EncodingType.BIN)]
        public List<byte> DataRaw
        {
            get { return this.dataRaw; }
            set
            {
                this.dataRaw = value;
                this.fuellingDataBlocks = this.ParseFuellingDataBlocks();
                this.pumpStateBlocks = this.ParsePumpStateBlocks();
            }
        }

        private IEnumerable<FuellingDataBlock> ParseFuellingDataBlocks()
        {
            if (this.DataRaw == null || !this.DataRaw.Any()) throw new ArgumentException("DataRaw is null or empty");
            List<FuellingDataBlock> results = null;
            int elapsedCount = 0;
            //skip the 信息计数n(1字节)
            var blocks = this.DataRaw.Skip(1);
            while (true)
            {
                var nxt = blocks.Skip(elapsedCount).ToArray();
                if (!nxt.Any()) return results;
                if (nxt.Length < 12)
                    return results;
                if (nxt[0] == 0x01)
                {
                    if (results == null) results = new List<FuellingDataBlock>();
                    elapsedCount += 12;
                    var block = new FuellingDataBlock()
                    {
                        NozzleNumber = nxt[1],
                        Amount = nxt.Skip(2).Take(4).ToInt32(),
                        Volume = nxt.Skip(6).Take(3).ToInt32(),
                        Price = nxt.Skip(9).Take(3).ToInt32()
                    };
                    results.Add(block);
                }
                else
                    elapsedCount += 4;
            }

            return results;
        }

        private IEnumerable<PumpStateBlock_OldVersion> ParsePumpStateBlocks()
        {
            if (this.DataRaw == null || !this.DataRaw.Any()) throw new ArgumentException("DataRaw is null or empty");
            List<PumpStateBlock_OldVersion> results = null;
            int elapsedCount = 0;
            //skip the 信息计数n(1字节)
            var blocks = this.DataRaw.Skip(1);
            while (true)
            {
                var nxt = blocks.Skip(elapsedCount).ToArray();
                if (!nxt.Any()) return results;
                if (nxt.Length < 5)
                    return results;
                //throw new ArgumentException("block data should either have length with times of 12 or 4, please check the full DataRaw: 0x" + this.DataRaw.ToHexLogString());
                if (nxt[0] == 0x01)
                {
                    elapsedCount += 12;
                }
                else
                {
                    if (results == null) results = new List<PumpStateBlock_OldVersion>();
                    elapsedCount += 5;
                    var block = new PumpStateBlock_OldVersion()
                    {
                        NozzleNumber = nxt[1],
                        PaymentMode = (byte)(nxt.Skip(2).Take(1).ToInt32()),
                        State = nxt.Skip(3).Take(2).ToInt32(),
                    };
                    results.Add(block);
                }
            }
        }

        public IEnumerable<FuellingDataBlock> FuellingDataBlocks => this.fuellingDataBlocks;

        public IEnumerable<PumpStateBlock_OldVersion> PumpStateBlocks => this.pumpStateBlocks;

        //public override string ToLogString()
        //{
        //    if(this.PumpStateBlocks!=null&&this.PumpStateBlocks.Any())
        //    return "PumpInOperationResponse report a PumpStateBlocks: "+this.PumpStateBlocks.Select(b=>b.NozzleNumber+b.PaymentMode+b.State;
        //}
    }

    public class PumpStateBlock_OldVersion
    {
        /// <summary>
        /// 枪号为以整个加油站为基础的油枪顺序编号
        /// </summary>
        public byte NozzleNumber { get; set; }

        public byte PaymentMode { get; set; }

        public int State { get; set; }
    }
}