//                           UNCLASSIFIED
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using System;
using System.Text;
using FpgaMeasurementInstrumentsLib;
using NLog;
using Raytheon.Common;

namespace Raytheon.Instruments
{
   /// <summary>
   /// A class that implements the Teradyne HSS Test Station Card
   /// </summary>
   public class CommFpgaHssubCardTs : IFpgaComm
   {
      #region PrivateClassMembers
      private string _name;
      private readonly string _cardAddress;
      private readonly int _startingOffset;
      private readonly string _firmware;
      private readonly uint _chassisHandle;
      private readonly int _hssubAppSyncHandle;
      private readonly int _hssubAppHandle;
      private readonly string _memMap;
      private SelfTestResult _selfTestResult;
      private int _cardHandle;

      private int _latestLbAddress;
      private int _latestLbData;

      private readonly ILogger _logger;

      private readonly IConfigurationManager _configurationManager;
      private readonly IConfiguration _configuration;

      public string DetailedStatus => throw new NotImplementedException();

      public bool DisplayEnabled { get => false; set => throw new NotImplementedException(); }
      public bool FrontPanelEnabled { get => false; set => throw new NotImplementedException(); }

      public InstrumentMetadata Info => throw new NotImplementedException();

      public string Name { get => _name; set { _name = value; } }

      public SelfTestResult SelfTestResult => PerformSelfTest();

      public State Status => State.Ready;

      #endregion

      #region PrivateFuctions

      /// <summary>
      /// 
      /// </summary>
      /// <param name="disposing"></param>
      protected virtual void Dispose(bool disposing)
      {
         if (disposing)
         {
            HssubNativeMethods.terHss_close(_chassisHandle);
         }
      }

      /// <summary>
      /// 
      /// </summary>
      public void Initialize()
      {
         int ret = HssubNativeMethods.terHss_Application_SendMessage(_chassisHandle, _hssubAppHandle, HssubNativeMethods.MESSAGE_CONTEXT_INIT_INSTRUMENT, _cardAddress.Length, Encoding.ASCII.GetBytes(_cardAddress), HssubNativeMethods.TERHSS_TIMEOUT_60SEC);
         if (ret != 0)
         {
            string errorStr = HssUtilTs.BuildErrorString(_chassisHandle, ret, _name);

            throw new Exception("terHss_Application_SendMessage() returned an error(" + ret + ")" + ": " + errorStr);
         }

         LoadFirmware();
      }

      /// <summary>
      /// 
      /// </summary>
      private void LoadFirmware()
      {
         // send the file to the subsystem
         int ret = HssubNativeMethods.terHss_Subsystem_SendFile(_chassisHandle, _firmware, "c:\\temp\\FPGAFile.hsi", HssubNativeMethods.TERHSS_OPTION_ALLOW_OVERWRITE);
         if (ret != 0)
         {
            string errorStr = HssUtilTs.BuildErrorString(_chassisHandle, ret, _name);

            throw new Exception("terHss_SubSyste_SendFile() returned an error(" + ret + ")" + ": " + errorStr);
         }

         // load the instrument
         ret = HssubNativeMethods.terHss_Application_SendMessage(_chassisHandle, _hssubAppHandle, HssubNativeMethods.MESSAGE_CONTEXT_LOAD_INSTRUMENT, 4, BitConverter.GetBytes(_cardHandle), HssubNativeMethods.TERHSS_TIMEOUT_60SEC);
         if (ret != 0)
         {
            string errorStr = HssUtilTs.BuildErrorString(_chassisHandle, ret, _name);

            throw new Exception("terHss_Application_SendMessage() returned an error(" + ret + ")" + ": " + errorStr);
         }

         // wait for the callback event
         HssUtilTs.WaitForSync(_chassisHandle, _hssubAppSyncHandle, _name);

         // delete the file
         ret = HssubNativeMethods.terHss_Subsystem_DeleteFile(_chassisHandle, "c:\\temp\\FPGAFile.hsi", HssubNativeMethods.TERHSS_OPTION_NONE);
         if (ret != 0)
         {
            string errorStr = HssUtilTs.BuildErrorString(_chassisHandle, ret, _name);

            throw new Exception("terHss_SubSyste_DeleteFile() returned an error(" + ret + ")" + ": " + errorStr);
         }
      }
      #endregion

      #region PublicFuctions

      /// <summary>
      /// CommFpgaHssubCardTs factory constructor
      /// </summary>
      /// <param name="deviceName"></param>
      /// <param name="configurationManager"></param>
      public CommFpgaHssubCardTs(string deviceName, IConfigurationManager configurationManager)
      {
         Name = deviceName;

         _logger = LogManager.GetLogger($"{this.GetType().Name} - {deviceName}");

         _configurationManager = configurationManager;
         _configuration = _configurationManager.GetConfiguration(Name);

         _cardAddress = _configuration.GetConfigurationValue("CommFpgaHssubCardTs", "CardAddress", "127.0.0.1");
         _startingOffset = _configuration.GetConfigurationValue("CommFpgaHssubCardTs", "StartingOffset", 0);
         _firmware = _configuration.GetConfigurationValue("CommFpgaHssubCardTs", "Firmware", "");
         _chassisHandle = _configuration.GetConfigurationValue<uint>("CommFpgaHssubCardTs", "ChassisHandle", 0);
         _hssubAppHandle = _configuration.GetConfigurationValue("CommFpgaHssubCardTs", "HssubAppHandle", 0);
         _hssubAppSyncHandle = _configuration.GetConfigurationValue("CommFpgaHssubCardTs", "HssubAppSyncHandle", 0);
         _memMap = _configuration.GetConfigurationValue("CommFpgaHssubCardTs", "MemMap", "");
         _cardHandle = 0;

         // this gets set by the HssubChassis when a LB Read callback arrives
         _latestLbAddress = -1;
         _latestLbData = -1;

         Initialize();
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="deviceName"></param>
      /// <param name="cardAddress"></param>
      /// <param name="startingOffset"></param>
      /// <param name="firmware"></param>
      /// <param name="chassisHandle"></param>
      /// <param name="hssubAppHandle"></param>
      /// <param name="hssubAppSyncHandle"></param>
      public CommFpgaHssubCardTs(string deviceName, string cardAddress, int startingOffset, string firmware, uint chassisHandle, int hssubAppHandle, int hssubAppSyncHandle, string memMap)
      {
         // hold onto args
         _name = deviceName;
         _logger = LogManager.GetLogger($"{this.GetType().Name} - {deviceName}");
         _cardAddress = cardAddress;
         _startingOffset = startingOffset;
         _firmware = firmware;
         _chassisHandle = chassisHandle;
         _hssubAppHandle = hssubAppHandle;
         _hssubAppSyncHandle = hssubAppSyncHandle;
         _memMap = memMap;

         // this gets set by the HssubChassis in SetHandle()
         _cardHandle = 0;

         // this gets set by the HssubChassis when a LB Read callback arrives
         _latestLbAddress = -1;
         _latestLbData = -1;

         Initialize();
      }

      /// <summary>
      /// The finalizer.
      /// </summary>
      ~CommFpgaHssubCardTs()
      {
         Dispose(false);
      }

      /// <summary>
      /// 
      /// </summary>
      public void Dispose()
      {
         Dispose(true);

         GC.SuppressFinalize(this);
      }

      /// <summary>
      /// 
      /// </summary>
      /// <returns></returns>
      public string GetMemMap()
      {
         return _memMap;
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="address"></param>
      public uint Read(string fpgaName, uint address)
      {
         // populate the structure
         HssUtilTs.LocalBusParams lbParams;
         lbParams.cardHandle = _cardHandle;
         lbParams.address = (int)(_startingOffset + address);
         lbParams.data = 0;

         // get the byte array
         byte[] dataToSend = HssUtilTs.LocalBusParmsToByteArray(lbParams);

         // reset the callback data items
         _latestLbAddress = -1;
         _latestLbData = -1;

         // send the message
         int ret = HssubNativeMethods.terHss_Application_SendMessage(_chassisHandle, _hssubAppHandle, HssubNativeMethods.MESSAGE_CONTEXT_LB_READ32, dataToSend.Length, dataToSend, HssubNativeMethods.TERHSS_TIMEOUT_10SEC);
         if (ret != 0)
         {
            string errorStr = HssUtilTs.BuildErrorString(_chassisHandle, ret, _name);

            throw new Exception("terHss_Application_SendMessage() returned an error(" + ret + ")" + ": " + errorStr);
         }

         // wait for the callback event
         HssUtilTs.WaitForSync(_chassisHandle, _hssubAppSyncHandle, _name);

         // confirm the address is what we requested (Set in SetLocalBusReadData())
         if (_latestLbAddress != lbParams.address)
         {
            throw new Exception("Received address: " + _latestLbAddress.ToString("X8") + " Expected: " + lbParams.address.ToString("X8"));
         }

         return (uint)_latestLbData;
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="address"></param>
      /// <param name="numberOfWordsToRead"></param>
      /// <param name="shallWeIncrementAddress"></param>
      /// <param name="dataRead"></param>
      public void ReadBlock(string fpgaName, uint address, uint numberOfWordsToRead, bool shallWeIncrementAddress, ref uint[] dataRead)
      {
         throw new Exception("Not Implemented");
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="cardHandle"></param>
      public void SetHandle(int cardHandle)
      {
         // this gets set in 
         _cardHandle = cardHandle;
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="address"></param>
      /// <param name="data"></param>
      public void SetLocalBusRxData(int address, int data)
      {
         _latestLbAddress = address;
         _latestLbData = data;
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="fpgaName"></param>
      /// <param name="address"></param>
      /// <param name="value"></param>
      public void Write(string fpgaName, uint address, uint value)
      {

         // populate the structure
         HssUtilTs.LocalBusParams lbParams;
         lbParams.cardHandle = _cardHandle;
         lbParams.address = (int)(_startingOffset + address);
         lbParams.data = (int)value;

         // get the byte array
         byte[] dataToSend = HssUtilTs.LocalBusParmsToByteArray(lbParams);

         // reset the callback data items
         _latestLbAddress = -1;
         _latestLbData = -1;

         // send the message
         int ret = HssubNativeMethods.terHss_Application_SendMessage(_chassisHandle, _hssubAppHandle, HssubNativeMethods.MESSAGE_CONTEXT_LB_WRITE32, dataToSend.Length, dataToSend, HssubNativeMethods.TERHSS_TIMEOUT_10SEC);
         if (ret != 0)
         {
            string errorStr = HssUtilTs.BuildErrorString(_chassisHandle, ret, _name);

            throw new Exception("terHss_Application_SendMessage() returned an error(" + ret + ")" + ": " + errorStr);
         }

         // wait for the callback event
         HssUtilTs.WaitForSync(_chassisHandle, _hssubAppSyncHandle, _name);

         // confirm the address is what we requested (Set in SetLocalBusReadData())
         /*if (_latestLbAddress != lbParams.address)
			{
			   throw new Exception("Received address: " + _latestLbAddress.ToString("X8") + " Expected: " + lbParams.address.ToString("X8"));
			}*/
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="fpgaName"></param>
      /// <param name="address"></param>
      /// <param name="numberOfWordsToWrite"></param>
      /// <param name="data"></param>
      /// <param name="shallWeIncrementAddress"></param>
      public void WriteBlock(string fpgaName, uint address, uint numberOfWordsToWrite, uint[] data, bool shallWeIncrementAddress)
      {
         throw new NotImplementedException();
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="fpgaName"></param>
      public void Initialize(string fpgaName)
      {
         Initialize();
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="fpgaName"></param>
      public void LoadFirmware(string fpgaName)
      {
         LoadFirmware();
      }

      /// <summary>
      /// 
      /// </summary>
      /// <returns></returns>
      public bool ClearErrors()
      {
         return false;
      }

      /// <summary>
      /// 
      /// </summary>
      /// <returns></returns>
      /// <exception cref="NotImplementedException"></exception>
      public SelfTestResult PerformSelfTest()
      {
         _selfTestResult = SelfTestResult.Unknown;
         return _selfTestResult;
      }
      /// <summary>
      /// 
      /// </summary>
      public void Reset()
      {
         Shutdown();

         Initialize();
      }

      /// <summary>
      /// 
      /// </summary>
      public void Shutdown()
      {
         Dispose();
      }
      #endregion
   }
}