using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace AwInitilizer.DLL
{
    public class SajetConnect
    {
        public enum CMD
        {
            Signin = 1, 
            SnCheck = 15,
            WoCheck = 14,
            Report = 16,
            Log = 4,
            HeaderRegister = 8,
            ValueReport = 5
        }


        [DllImport("SajetConnect.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)]
        public static extern bool SajetTransStart();

        [DllImport("SajetConnect.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)]
        public static extern bool SajetTransClose();

        //[DllImport("SajetConnect.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)]
        //public static extern bool SajetTransData(int command, IntPtr data, IntPtr length);

        [DllImport("SajetConnect.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)]
        public static extern bool SajetTransData(int command, IntPtr data, IntPtr length);

        [DllImport("SajetConnect.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)]
        public static extern bool SajetTransData_C(int command, out string data);

        private static string userId = "";
        public static bool SajetTransSignIn(ref string data)
        {
            var attemptId = data;
            if(SajetTransData(CMD.Signin, ref data))
            {
                if(string.IsNullOrEmpty(data) || data.StartsWith("NG"))
                {
                    userId = "";
                    return false;
                }
                else
                {
                    userId = attemptId;
                    return true;
                }
            }
            userId = "";
            return false;
        }

        private static string WorkOrder = "";
        public static bool SajetTransWoCheck(ref string workOrder)
        {
            if (string.IsNullOrEmpty(userId))
                return false;
            if (workOrder == null)
                workOrder = "";
            var msg = userId + "," + workOrder + ",";

            if (SajetTransData(CMD.WoCheck, ref msg))
            {
                if (string.IsNullOrEmpty(msg) || msg.StartsWith("NG"))
                {
                    WorkOrder = "";
                    return false;
                }
                else
                {
                    WorkOrder = workOrder;
                    return true;
                }
            }
            WorkOrder = "";
            return false;
        }
        
        private static string SN;
        public static bool SajetTransSnCheck(ref string serialNumber)
        {
            var attemptSN = serialNumber;
            if (string.IsNullOrEmpty(userId))
                return false;
            if (WorkOrder == null)
                WorkOrder = "";
            var msg = userId + "," + WorkOrder + "," + serialNumber + ",";

            if (SajetTransData(CMD.SnCheck, ref msg))
            {
                if (string.IsNullOrEmpty(msg) || msg.StartsWith("NG"))
                {
                    SN = "";
                    return false;
                }
                else
                {
                    SN = attemptSN;
                    return true;
                }
            }
            SN = "";
            return false;
        }

        public static bool SajetTranFinish(bool Result)
        {
            if (string.IsNullOrEmpty(userId))
                return false;
            if (string.IsNullOrEmpty(WorkOrder))
                return false;
            if (string.IsNullOrEmpty(SN))
                return false;
            string msg = userId +"," + WorkOrder + "," + SN + ",";

            if (string.IsNullOrEmpty(msg))
                return false;
            Result = false;

            if (!Result)
                return true;

            if (Result)
            {
                msg += "OK,";
            }
            else
            {
                msg += "NG,";
            }
            return SajetTransData(CMD.Report, ref msg);
        }

        public static string SajetTransRegisterHeader(string model, string header)
        {
            if (string.IsNullOrEmpty(userId))
                return "";
            var msg = userId + ",";
            msg += model + "," + header;
            if (SajetTransData(CMD.HeaderRegister,ref msg))
            {
                if(msg.StartsWith("OK"))
                {
                    //get codename
                    msg = msg.Substring(3);
                    var spaceIndex = msg.IndexOf(",");
                    if (spaceIndex > 0)
                    {
                        msg = msg.Substring(0, spaceIndex);
                    }
                    return msg;
                }
                return null;
            }
            return null;
        }

        public static bool SajetTransReport(Dictionary<string,int> resultPair,Dictionary<string,string> codePair)
        {
            if (string.IsNullOrEmpty(userId))
                return false;
            if (string.IsNullOrEmpty(SN))
                return false;
            string msg = userId + "," + SN + ",";
            foreach(var result in resultPair)
            {
                if(codePair.Keys.Contains(result.Key))
                {
                    msg += string.Format("{0}:{1},", codePair[result.Key],string.Format("{0}.00", result.Value) );
                }
            }
            return SajetTransData(CMD.ValueReport,ref msg);
        }

        public static bool SajetTransLog (string data,bool isError)
        {
            if (string.IsNullOrEmpty(userId))
                return false;
            if (string.IsNullOrEmpty(SN))
                return false;
            string prefix = userId + "," + SN + ",";
            while (data.Length > 0)
            {
                var msg = prefix;
                int sendLength = Math.Min(250 - msg.Length, data.Length);
                var sendString = data.Substring(0, sendLength);
                msg += sendString;
                if (!SajetTransData(CMD.Log, ref msg))
                {
                    break;
                }
                data = data.Substring(sendLength);
            }
            return data.Length == 0;
        }

        private static bool SajetTransData(CMD command, ref string data)
        {
            return SajetTransData((int)command,ref data);
        }

        private static string GetSendPrefix()
        {
            string msg = "";
            if (string.IsNullOrEmpty(userId))
            {
                return null;
            }
            msg = userId + ",";
            if (string.IsNullOrEmpty(WorkOrder))
            {
                return null;
            }
            msg += WorkOrder + ",";
            return msg;
        }

        private static bool SajetTransData(int command,ref string data)
        {
            //return true;
            if(!data.EndsWith(","))
            {
                data = data + ",";
            }

            var idByte = Encoding.ASCII.GetBytes(data);
            var length = idByte.Length;

            var dataArrayLength = Math.Max(length, 100);
            var dataArray = new byte[dataArrayLength];
            Array.Copy(idByte, 0, dataArray, 0, length);

            IntPtr dataIntPtr = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(dataArrayLength);
            System.Runtime.InteropServices.Marshal.Copy(dataArray, 0, dataIntPtr, dataArray.Length);

            IntPtr lengthIntPtr = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(10);
            System.Runtime.InteropServices.Marshal.WriteInt32(lengthIntPtr, length);

            var sendResult = SajetConnect.SajetTransData(command, dataIntPtr, lengthIntPtr);

            var resultString1 = System.Runtime.InteropServices.Marshal.PtrToStringAnsi(dataIntPtr);

            System.Runtime.InteropServices.Marshal.Copy(dataIntPtr, dataArray, 0, dataArrayLength);
            System.Runtime.InteropServices.Marshal.Release(dataIntPtr);

            var readLength = System.Runtime.InteropServices.Marshal.ReadInt32(lengthIntPtr);
            System.Runtime.InteropServices.Marshal.Release(lengthIntPtr);

            var resultString = Encoding.ASCII.GetString(dataArray);

            data = resultString1.Substring(0, Math.Min(readLength, resultString1.Length));
            return sendResult;
        }
    }
}