using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using GSG.NET.Utils;

namespace OHVConnector
{
    public enum eKind
    {
        Unknown, // Not Define
        E, //Error
        S, //State
        B, //Battery
        T, //
        C,
        P,
        I,//수동명령보고,응답
        O,
        A,//Alive Check
        L,
        U,
        F,
        M,//Move
        R,
        H,
        Z,
        G, //MTL 이동 명령
        W,
        K, //총 주행 거리.
    }

    public class OCSMessage
    {
        const byte STX = 0x02;
        const byte ETX = 0x03;

        public string Id { get; set; }
        public eKind Kind { get; set; }

        //SubCode 만들기 위한 Bool
        public bool IsSubCode1 { get; set; } = false;
        public bool IsSubCode2 { get; set; } = false;
        public bool IsSubCode3 { get; set; } = false;

        public string RevID { get; set; }
        public string SendID { get; set; }
        public string Tag { get; set; }
        public string SubCode { get; set; }

        /// <summary>
        /// Battery SOH 상태 보고 추가.
        /// 000 3자리로 맞춘다.
        /// </summary>
        public string BatterySOH { get; set; }
        public string CheckSum { get; set; }

        public IList<string> ViaRouteList { get; set; }

        public OCSMessage()
        {
            this.ViaRouteList = new List<string>();
        }

        public string LogFormat()
        {
            if ( this.Kind == eKind.B )
                return $"{this.Id} - {this.RevID} <- {this.SendID} : kind [{this.Kind.ToString()}] / Tag [{this.Tag}] / SubCode [{this.MakeSubcode()}] / SOH[{this.BatterySOH}] / CheckSum [{this.GetCheckSum()}]";

            if ( this.ViaRouteList.Count <= 0 )
                return $"{this.Id} - {this.RevID} <- {this.SendID} : kind [{this.Kind.ToString()}] / Tag [{this.Tag}] / SubCode [{this.MakeSubcode()}] / CheckSum [{this.GetCheckSum()}] / {this.ViaRouteList.Count}";
            else
            {
                StringBuilder viaList = new StringBuilder();
                var ll = this.ViaRouteList.ToList();
                ll.ForEach( x => { viaList.Append( x ); viaList.Append( ";" ); } );
                return $"{this.Id} - {this.RevID} <- {this.SendID} : kind [{this.Kind.ToString()}] / Tag [{this.Tag}] / SubCode [{this.MakeSubcode()}] / CheckSum [{this.GetCheckSum()}] / {this.ViaRouteList.Count} / {viaList}";
            }
        }

        public int SubCodeToInt()
        {
            int result = 0;

            if ( string.IsNullOrEmpty( this.SubCode ) )
            {
                StringBuilder sb = new StringBuilder();
                sb.Append( this.IsSubCode1 ? "1" : "0" );
                sb.Append( this.IsSubCode2 ? "1" : "0" );
                sb.Append( this.IsSubCode3 ? "1" : "0" );

                int.TryParse( sb.ToString(), out result );
            }
            else
                int.TryParse( this.SubCode, out result );

            return result;
        }

        string MakeSubcode()
        {
            if ( !string.IsNullOrEmpty( this.SubCode ) )
            {
                return this.SubCode;
            }
            else
            {
                StringBuilder sb = new StringBuilder();
                sb.Append( this.IsSubCode1 ? "1" : "0" );
                sb.Append( this.IsSubCode2 ? "1" : "0" );
                sb.Append( this.IsSubCode3 ? "1" : "0" );

                return this.SubCode = sb.ToString();
            }
        }

        public MemoryBuffer ToMemoryBuffer()
        {
            var mb = new MemoryBuffer();
            mb.Append( STX );
            mb.AppendAscii( RevID );
            mb.AppendAscii( SendID );
            mb.AppendAscii( this.Kind.ToString() );
            mb.AppendAscii( this.Tag ); //4자리로 맞춘다.
            mb.AppendAscii( MakeSubcode() );

            if ( this.Kind == eKind.M )
            {
                var viaCountj = this.ViaRouteList.Count.ToString( "0000" );
                foreach ( var item in this.ViaRouteList )
                {
                    mb.AppendAscii( item );
                }
            }

            if ( this.Kind == eKind.B )
            {
                if ( string.IsNullOrEmpty( this.BatterySOH ) )
                    mb.AppendAscii( "000" );
                else
                    mb.AppendAscii( this.BatterySOH.PadLeft( 3, '0' ) );
            }

            this.CheckSum = Convert.ToString( GetCheckSum( mb.ToBytes ), 16 ).ToLower();
            mb.AppendAscii( this.CheckSum );
            mb.Append( ETX );

            return mb;
        }

        public byte[] ToCRC8Byte4Send()
        {
            var mb = new MemoryBuffer();
            mb.Append( STX );
            mb.AppendAscii( RevID );
            mb.AppendAscii( SendID );
            mb.AppendAscii( this.Kind.ToString() );
            mb.AppendAscii( this.Tag ); //4자리로 맞춘다.
            mb.AppendAscii( MakeSubcode() );

            if ( this.Kind == eKind.M )
            {
                var viaCountj = this.ViaRouteList.Count.ToString( "0000" );
                foreach ( var item in this.ViaRouteList )
                {
                    mb.AppendAscii( item );
                }
            }

            if ( this.Kind == eKind.B )
            {
                if ( string.IsNullOrEmpty( this.BatterySOH ) )
                    mb.AppendAscii( "000" );
                else
                    mb.AppendAscii( this.BatterySOH.PadLeft( 3, '0' ) );
            }

            return mb.ToBytes;
        }

        /// <summary>
        /// OCS 응답 Msg 는 Recived, Send 가 바뀌어서 옴
        /// 강제로 바꿔서 맞춤.
        /// </summary>
        /// <returns></returns>
        public byte[] ToCRC8Byte4Received()
        {
            var mb = new MemoryBuffer();
            mb.Append( STX );
            mb.AppendAscii( SendID );
            mb.AppendAscii( RevID );
            mb.AppendAscii( this.Kind.ToString() );
            mb.AppendAscii( this.Tag ); //4자리로 맞춘다.
            mb.AppendAscii( MakeSubcode() );

            if ( this.Kind == eKind.M )
            {
                var viaCountj = this.ViaRouteList.Count.ToString( "0000" );
                foreach ( var item in this.ViaRouteList )
                {
                    mb.AppendAscii( item );
                }
            }

            if ( this.Kind == eKind.B )
            {
                if ( string.IsNullOrEmpty( this.BatterySOH ) )
                    mb.AppendAscii( "000" );
                else
                    mb.AppendAscii( this.BatterySOH.PadLeft( 3, '0' ) );
            }

            return mb.ToBytes;
        }

        public byte GetCheckSum()
        {
            var mb = new MemoryBuffer( 18 );
            mb.Append( STX );
            mb.AppendAscii( RevID );
            mb.AppendAscii( SendID );
            mb.AppendAscii( this.Kind.ToString() );
            mb.AppendAscii( this.Tag );
            mb.AppendAscii( MakeSubcode() );

            return GetCheckSum( mb.ToBytes );
        }

        byte GetCheckSum( byte[] bs )
        {
            byte rb = 0;
            foreach ( var item in bs )
            {
                if ( item == STX ) continue;
                rb += item;
            }
            return (byte)( rb & 0xf ); //&0xff 수정.
        }
    }
}