//                           UNCLASSIFIED
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using System;
using NationalInstruments.ModularInstruments.NISwitch;
using NLog;
using Raytheon.Common;

namespace Raytheon.Instruments
{
   /// <summary>
   /// A simulated implementation of the ISwitch interface.
   /// </summary>
   public class SwitchNiPxi : ISwitch, IDisposable
   {
      #region PrivateMemberVariables

      private NISwitch _niSwitch;
      private string _name;
      private readonly string _address;
      private readonly string _topology;
      private State _state;
      private SelfTestResult _selfTestResult;

      private readonly ILogger _logger;

      private readonly IConfigurationManager _configurationManager;
      private readonly IConfiguration _configuration;

      #endregion

      #region PrivateFunctions

      /// <summary>
      /// The Finalizer
      /// </summary>
      ~SwitchNiPxi()
      {
         Dispose(false);
      }

      /// <summary>
      /// Dispose of this object's resources.
      /// </summary>
      /// <param name="disposing">True = currently disposing, False = not disposing.</param>
      protected virtual void Dispose(bool disposing)
      {
         if (disposing)
         {
            if (_state == State.Ready)
            {
               _niSwitch.Utility.Reset();

               _niSwitch.Close();

               _niSwitch.Dispose();

               _state = State.Uninitialized;
            }
         }
      }

      #endregion

      #region PublicFunctions

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

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

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

         _address = _configuration.GetConfigurationValue("SwitchNiPxi", "Address", "");
         _topology = _configuration.GetConfigurationValue("SwitchNiPxi", "Topology", "");

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

      /// <summary>
      /// 
      /// </summary>
      /// <param name="deviceName"></param>
      /// <param name="address"></param>
      public SwitchNiPxi(string deviceName, string address, string topology = "")
      {
         _name = deviceName;
         _logger = LogManager.GetLogger($"{this.GetType().Name} - {deviceName}");
         _address = address;
         _topology = topology;

         // set in Initialize()
         _niSwitch = null;

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

      /// <summary>
      /// 
      /// </summary>
      /// <returns></returns>
      public bool ClearErrors()
      {
         throw new NotImplementedException();
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="path"></param>
      public void Connect(string path)
      {
         _niSwitch.RelayOperations.RelayControl(path, SwitchRelayAction.CloseRelay);
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="path"></param>
      public void Disconnect(string path)
      {
         _niSwitch.RelayOperations.RelayControl(path, SwitchRelayAction.OpenRelay);
      }

      /// <summary>
      /// 
      /// </summary>
      public void DisconnectAll()
      {
         _niSwitch.Path.DisconnectAll();
      }

      /// <summary>
      /// Dispose of this object.
      /// </summary>
      public void Dispose()
      {
         Dispose(true);

         GC.SuppressFinalize(this);
      }

      /// <summary>
      /// 
      /// </summary>
      public string DetailedStatus
      {
         get
         {
            return "This is a NI Switch";
         }
      }

      /// <summary>
      /// 
      /// </summary>
      public bool DisplayEnabled
      {
         get
         {
            throw new NotImplementedException();
         }

         set
         {
            throw new NotImplementedException();
         }
      }

      /// <summary>
      /// 
      /// </summary>
      public bool FrontPanelEnabled
      {
         get
         {
            throw new NotImplementedException();
         }

         set
         {
            throw new NotImplementedException();
         }
      }

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

      /// <summary>
      /// 
      /// </summary>
      public bool IsDebounced
      {
         get
         {
            throw new NotImplementedException();
         }
      }

      /// <summary>
      /// 
      /// </summary>
      public void Initialize()
      {
         if (_state == State.Uninitialized)
         {
            _niSwitch = new NISwitch(_address, _topology, false, true);

            //_niSwitch.ModuleCharacteristics.PowerDownLatchingRelaysAfterDebounce

            _state = State.Ready;
         }
         else
         {
            throw new Exception("expected the state to be Uninitialized, state was: " + _state.ToString());
         }
      }

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

      /// <summary>
      /// 
      /// </summary>
      /// <returns></returns>
      public SelfTestResult PerformSelfTest()
      {
         Ivi.Driver.SelfTestResult res = _niSwitch.Utility.SelfTest();

         if (res.Code != 0)
         {
            _selfTestResult = Raytheon.Instruments.SelfTestResult.Fail;
            throw new Exception("self test returned: " + res.Code + "," + res.Message + " on card " + _name);
         }

         _selfTestResult = Raytheon.Instruments.SelfTestResult.Pass;

         return _selfTestResult;
      }

      /// <summary>
      /// 
      /// </summary>
      public void Reset()
      {
         _niSwitch.Utility.Reset();
      }

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

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

      /// <summary>
      /// 
      /// </summary>
      public void Shutdown()
      {
         if (_state == State.Ready)
         {
            _niSwitch.Utility.Reset();

            _niSwitch.Close();

            _niSwitch.Dispose();

            _state = State.Uninitialized;
         }
      }

      #endregion
   }
}