using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DTS.Common.Enums.DASFactory;
using DTS.Common.Interface.DASFactory;
using DTS.Common.Utilities.Logging;

namespace DTS.DASLib.Command.SLICE.DownloadCommands
{
    public class QueryUARTEventData : EventDataCommands
    {
        public const int MAX_DATA_LENGTH = 2000;
        public const int PAYLOAD_HEADER_LENGTH = 14;
        protected override Commands Command => Commands.QueryUartEventData;

        protected ushort _eventNumber;
        protected uint _requestByteCount;
        protected ulong _requestOffsetByteCount;
        protected uint _payloadByteCount;
        protected ulong _payloadOffsetByteCount;
        protected byte[] _data;

        public ushort EventNumber
        {
            get => _eventNumber;
            set { _eventNumber = value; command.SetParameter(0, _eventNumber); }
        }

        public uint RequestByteCount
        {
            get => _requestByteCount;
            set { _requestByteCount = value; command.SetParameter(2, _requestByteCount); }
        }

        public ulong RequestOffsetByteCount
        {
            get => _requestOffsetByteCount;
            set { _requestOffsetByteCount = value; command.SetParameter(6, _requestOffsetByteCount); }
        }

        public uint PayloadByteCount => _payloadByteCount;

        public ulong PayloadOffsetByteCount => _payloadOffsetByteCount;

        public byte[] PayloadData => _data;

        public QueryUARTEventData(ICommunication sock) : base(sock)
        {
            command.Parameter = new byte[14];
            _data = null;

            _eventNumber = 0;
            _requestByteCount = 0;
            _requestOffsetByteCount = 0;
            _payloadByteCount = 0;
            _payloadOffsetByteCount = 0;

            command.ShouldLog = false;
        }

        public QueryUARTEventData(ICommunication sock, int timeoutMillisec) : base(sock, timeoutMillisec)
        {
            command.Parameter = new byte[14];
            _data = null;

            _eventNumber = 0;
            _requestByteCount = 0;
            _requestOffsetByteCount = 0;
            _payloadByteCount = 0;
            _payloadOffsetByteCount = 0;

            command.ShouldLog = false;
        }

        public override void Execute(CommandCallback cb, object cbData)
        {
            // Do a little parameter checking
            _data = null;
            base.Execute(cb, cbData);
        }

        protected override CommandReceiveAction WholePackagePost()
        {
            // now send the data to the user
            var stat = CommandStatus.Success;
            if (response.Status != DFConstantsAndEnums.CommandStatus.StatusNoError)
            {
                var s = (int)response.Status;
                APILogger.LogString("QueryUARTEventData.WholePackagePost: reporting failure, status==" + CommandPacketBase.StatusLabels[s] + " (0x" + s.ToString("X") + ")");
                stat = CommandStatus.Failure;
            }
            var cbReport = new QueryEventDataReport(stat, UserCallbackData);
            //cbReport.Data = new short[_channelsDownloaded][];
            //for (var i = 0; i < _channelsDownloaded; i++)
            //    GetChannelData(i, out cbReport.Data[i]);
            return UserCallback(cbReport);
        }

        protected override CommandReceiveAction WholePackage()
        {
            if (response.Status != DFConstantsAndEnums.CommandStatus.StatusNoError)
            {
                return CommandReceiveAction.StopReceiving;
            }
            response.GetParameter(0, out ushort responseEventNum);
            response.GetParameter(2, out _payloadByteCount);
            response.GetParameter(6, out _payloadOffsetByteCount);
            _data = new byte[_payloadByteCount];
            for (var i = 0; i < _payloadByteCount; i++)
            {
                response.GetParameter(PAYLOAD_HEADER_LENGTH + i, out _data[i]);
            }

            return CommandReceiveAction.StopReceiving;
        }

        public override void SyncExecute()
        {
            // Do a little parameter checking
            _data = null;
            base.SyncExecute();
        }

        public override void CommandToString(ref List<List<string>> lines)
        {
            lines.Add(new List<string> { $"Event number: {EventNumber}, RequestByteCount: {RequestByteCount}, OffsetByteCount: {RequestOffsetByteCount}" });
        }

        public override void ResponseToString(ref List<List<string>> lines)
        {
            lines.Add(new List<string>
            {
                $"PayloadByteCount: {PayloadByteCount}, OffsetByteCount: {PayloadOffsetByteCount}"
            });
        }

        public void LogResponse()
        {
            LogCommand(false);
        }
    }
}