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

namespace ShellChina_EPS_Project_CarPlatePay_EpsClient_App.MessageEntity.Incoming
{
    public class PaymentResponse : PaymentCommand
    {
        static PaymentResponse()
        {
            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
        }

        private int ContentPrefixLength = 0;

        public override int P_3_处理码 { get { this.ParseFromContent(); return base.P_3_处理码; } }
        public override decimal P_4_交易金额 { get { this.ParseFromContent(); return base.P_4_交易金额; } }
        public override decimal P_5_实付金额 { get { this.ParseFromContent(); return base.P_5_实付金额; } }
        public override DateTime P_7_交易时间 { get { this.ParseFromContent(); return base.P_7_交易时间; } }
        public override string P_12_交易流水号 { get { this.ParseFromContent(); return base.P_12_交易流水号; } }
        public override string P_18_商户订单号 { get { this.ParseFromContent(); return base.P_18_商户订单号; } }
        /// <summary>
        /// “00000”表示交易成功，“00001”表示交易失败
        /// </summary>
        public override string P_39_交易响应码 { get { this.ParseFromContent(); return base.P_39_交易响应码; } }
        public override string P_40_错误信息 { get { this.ParseFromContent(); return base.P_40_错误信息; } }
        //public override string P_41_终端编号 { get { this.ParseFromContent(); return base.P_41_终端编号; } }

        private void ParseFromContent()
        {
            this.P_3_处理码 = base.Content.Skip(ContentPrefixLength).Take(3).GetBCD();
            var dynamicOffset = 3;
            if (base.BitMap.Determine(4))
            {
                this.P_4_交易金额 = (decimal)(base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Take(6).GetBCD()) / 100;
                dynamicOffset += 6;
            }

            if (base.BitMap.Determine(5))
            {
                this.P_5_实付金额 = (decimal)(base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Take(6).GetBCD()) / 100;
                dynamicOffset += 6;
            }

            if (base.BitMap.Determine(7))
            {
                this.P_7_交易时间 =
                    new DateTime(
                        base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Take(2).GetBCD(),
                        base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Skip(2).Take(1).GetBCD(),
                        base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Skip(3).Take(1).GetBCD(),
                        base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Skip(4).Take(1).GetBCD(),
                        base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Skip(5).Take(1).GetBCD(),
                        base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Skip(6).Take(1).GetBCD()
                    );
                //DateTime.Parse(
                //base.Content.Skip(ContentPrefixLength).Skip(dynamicOffset).Take(7).ToArray().GetBCDString());
                dynamicOffset += 7;
            }

            if (base.BitMap.Determine(12))
            {
                this.P_12_交易流水号 = Encoding.ASCII.GetString(base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(9).ToArray());
                dynamicOffset += 9;
            }

            //field 18 is LLVAR
            if (base.BitMap.Determine(18))
            {
                int len = base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(2).GetBCD();
                dynamicOffset += 2;
                this.P_18_商户订单号 = Encoding.ASCII.GetString(base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(len).ToArray());
                dynamicOffset += len;
            }

            this.P_39_交易响应码 = Encoding.ASCII.GetString(base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(5).ToArray());
            dynamicOffset += 5;
            //field 40 is LLLVAR
            if (base.BitMap.Determine(40))
            {
                int len = base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(2).GetBCD();
                dynamicOffset += 2;
                this.P_40_错误信息 = Encoding.GetEncoding("GB2312").GetString(base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(len).ToArray());
                dynamicOffset += len;
            }

            //if (base.BitMap.Determine(41))
            //    this.P_41_终端编号 = Encoding.ASCII.GetString(base.Content.Skip(ContentPrefixLength + dynamicOffset).Take(12).ToArray());
        }
    }
}