//                           UNCLASSIFIED
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AUTHORIZED BY RAYTHEON COMPANY IN WRITING TO USE IT. DISCLOSURE TO
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OUTSIDE RAYTHEON COMPANY WITHOUT THE EXPRESS WRITTEN APPROVAL OF RAYTHEON
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GOVERNMENT.

UNPUBLISHED WORK - COPYRIGHT RAYTHEON COMPANY.
-------------------------------------------------------------------------*/

using NLog;
using Raytheon.Common;
using System;
using System.Collections.Generic;
using System.Threading;

namespace Raytheon.Instruments
{
	/// <summary>
	/// A simulated fpga
	/// </summary>
	public class CommFpgaSim : IFpgaComm
	{
		#region PrivateClassMembers
		private Dictionary<uint, uint> _registers;
		private static object _syncObj = new Object();
		private SelfTestResult _selfTestResult;
		private State _state;
		private string _name;

		/// <summary>
		/// NLog logger
		/// </summary>
		private readonly ILogger _logger;
		/// <summary>
		/// Raytheon configuration
		/// </summary>
		private readonly IConfigurationManager _configurationManager;
		private readonly IConfiguration _configuration;

		#endregion

		#region PrivateFunctions
		/// <summary>
		/// The finalizer.
		/// </summary>
		~CommFpgaSim()
		{
			Dispose(false);
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="disposing"></param>
		protected virtual void Dispose(bool disposing)
		{
			try
			{
				if (disposing)
				{
				}
			}
			catch (Exception)
			{
				try
				{
					//ErrorLogger.Instance().Write(err.Message + "\r\n" + err.StackTrace);
				}
				catch (Exception)
				{
					//Do not rethrow. Exception from error logger that has already been garbage collected
				}
			}
		}
		#endregion

		#region PublicFuctions

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

			_logger = logger;

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

			_selfTestResult = SelfTestResult.Unknown;
			_state = State.Uninitialized;
			_registers = null;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="name"></param>
		public CommFpgaSim(string name)
		{
			_name = name;
			_logger = LogManager.GetCurrentClassLogger();
			_selfTestResult = SelfTestResult.Unknown;
			_state = State.Uninitialized;
			_registers = null;
		}

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

		/// <summary>
		/// 
		/// </summary>
		public string DetailedStatus
		{
			get
			{
				return "This is a FPGA Sim called " + _name;
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public bool DisplayEnabled
		{
			get
			{
				return false;
			}

			set
			{
				throw new NotImplementedException();
			}
		}

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

					GC.SuppressFinalize(this);
				}
				catch (Exception)
				{
					try
					{
						//ErrorLogger.Instance().Write(err.Message + "\r\n" + err.StackTrace);
					}
					catch (Exception)
					{
						//Do not rethrow. Exception from error logger that has already been garbage collected
					}
				}
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public bool FrontPanelEnabled
		{
			get
			{
				return false;
			}

			set
			{
				throw new NotImplementedException();
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public InstrumentMetadata Info
		{
			get
			{
				throw new NotImplementedException();
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public void Initialize()
		{
			throw new NotImplementedException();
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="fpga"></param>
		public void Initialize(string fpga)
		{
			lock (_syncObj)
			{
				if (_state == State.Uninitialized)
				{
					_state = State.Ready;
					_registers = new Dictionary<uint, uint>();
				}
				else
				{
					throw new Exception("expected the state to be Uninitialized, state was: " + _state.ToString() + " on card " + _name);
				}
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public string Name
		{
			get
			{
				return _name;
			}
			set { _name = value; }
		}

		/// <summary>
		/// 
		/// </summary>
		/// <returns></returns>
		public SelfTestResult PerformSelfTest()
		{
			_selfTestResult = SelfTestResult.Unknown;
			return _selfTestResult;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="fpgaName"></param>
		/// <param name="address"></param>
		/// <returns></returns>
		public uint Read(string fpgaName, uint address)
		{
			lock (_syncObj)
			{
				Thread.Sleep(50);

				if (_registers.ContainsKey(address) == true)
				{
					return _registers[address];
				}
				else
				{
					return 0xffffffff;
				}
			}
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="fpgaName"></param>
		/// <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)
		{
			lock (_syncObj)
			{
				Thread.Sleep(50);

				for (int i = 0; i < numberOfWordsToRead; i++)
				{
					dataRead[i] = Read(fpgaName, address);

					if (shallWeIncrementAddress == true)
					{
						address += 4;
					}
				}
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public void Reset()
		{
			Shutdown();

			Initialize();
		}

		/// <summary>
		/// 
		/// </summary>
		public SelfTestResult SelfTestResult
		{
			get
			{
				return _selfTestResult;
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public State Status
		{
			get
			{
				return _state;
			}
		}

		/// <summary>
		/// 
		/// </summary>
		public void Shutdown()
		{
			_state = State.Uninitialized;
		}

		/// <summary>
		/// 
		/// </summary>
		/// <param name="fpgaName"></param>
		/// <param name="address"></param>
		/// <param name="value"></param>
		public void Write(string fpgaName, uint address, uint value)
		{
			lock (_syncObj)
			{
				Thread.Sleep(50);

				_registers[address] = value;
			}
		}

		/// <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)
		{
			lock (_syncObj)
			{
				Thread.Sleep(50);

				for (int i = 0; i < numberOfWordsToWrite; i++)
				{
					uint dataItem = data[i];

					Write(fpgaName, address, dataItem);

					if (shallWeIncrementAddress == true)
					{
						address += 4;
					}
				}
			}
		}

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

		#endregion
	}
}