//                           UNCLASSIFIED
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// Ignore Spelling: Selftest ovp ocp

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using NLog;
using Raytheon.Instruments;
using Raytheon.Instruments.PowerSupply;

namespace MeasurementManagerLib
{
   /// <summary>
   /// The entry point for the library that controls power supplies.
   /// This class parses out the definition of all power supplies in a system and provides control to the host.
   /// In simple cases, the host only needs to fill in the ini file and use the OutputDisable() and OutputEnable() functions.
   /// A variety of other capability is exposed for more complex applications.
   /// </summary>
   public class PowerSupplyMeasurementManager : IDisposable
   {
      #region PublicClassMembers
      private Exception _exceptionFromSuportThread;
      private object _powerSupplySelfTestSyncOjb = new object();

      #endregion

      #region PrivateClassMembers
      // power system name to power system object
      private SortedDictionary<string, IPowerSupplySystem> _powerSystemNameToObjectMap;

      // power module name to power system object
      private SortedDictionary<string, IPowerSupplySystem> _powerModuleNameToObjectMap;

      private static NLog.ILogger _logger;
      private IInstrumentManager _instrumentManager;

      private string _powerSystemWithFailedSelfTest = String.Empty;

      #endregion

      #region PublicFuctions

      /// <summary>
      /// will create an array of power systems with power supplies
      /// </summary>
      /// <param name="instrumentManager"></param>
      /// <param name="powerSupplySystems"></param>
      public PowerSupplyMeasurementManager(IInstrumentManager instrumentManager)
      {
         _logger = LogManager.GetCurrentClassLogger();
         _instrumentManager = instrumentManager;

         _powerSystemNameToObjectMap = new SortedDictionary<string, IPowerSupplySystem>();

         // create some maps to support the functions the MAL input
         _powerSystemNameToObjectMap = new SortedDictionary<string, IPowerSupplySystem>(StringComparer.InvariantCultureIgnoreCase);
         _powerModuleNameToObjectMap = new SortedDictionary<string, IPowerSupplySystem>(StringComparer.InvariantCultureIgnoreCase);

         PerformPowerSupplySelfTests();

         if (_powerSystemWithFailedSelfTest != String.Empty)
         {
            throw new Exception($"{_powerSystemWithFailedSelfTest}'s self-test failed.");
         }
         else if (_exceptionFromSuportThread != null)
         {
            throw new Exception("Check inner exception", _exceptionFromSuportThread);
         }

         ICollection<object> powerSystemList = _instrumentManager.GetInstruments(typeof(IPowerSupplySystem));
         // populate the maps
         foreach (IPowerSupplySystem powerSystem in powerSystemList)
         {
            powerSystem.Initialize();
            _powerSystemNameToObjectMap[powerSystem.Name.ToUpper()] = powerSystem;

            List<string> moduleNames = powerSystem.GetModuleNames();

            foreach (string moduleName in moduleNames)
            {
               if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()))
               {
                  throw new Exception("There is more than 1 power system that have the same module name: " + moduleName);
               }

               _powerModuleNameToObjectMap[moduleName.ToUpper()] = powerSystem;
            }
         }
      }

      /// <summary>
      /// Perform self test on power supply system
      /// Self test for each power system takes a while, so we don't want to run self test every time we initialize the power system
      /// So we only want to run self test under 2 conditions:
      ///    1. Certain time has elapsed since last power off
      ///    2. Certain time has elapsed since last self test run ( in the absence of power off time)
      /// </summary>
      /// <param name="name"></param>
      /// <returns></returns>
      private void PerformPowerSupplySelfTests()
      {
         _logger.Debug($"Entering {this.GetType().Name}::{System.Reflection.MethodBase.GetCurrentMethod().Name}() method...");

         string errorMsg = String.Empty;

         ICollection<object> powerSystemList = _instrumentManager.GetInstruments(typeof(IPowerSupplySystem));

         Task[] taskArray = new Task[powerSystemList.Count];

         int index = 0;
         foreach (IPowerSupplySystem powerSystem in powerSystemList)
         {
            // perform self test on power system
            Task task = Task.Factory.StartNew(() => PerformPowerSupplySelfTestTask(powerSystem));
            taskArray.SetValue(task, index++);
         }

         Task.WaitAll(taskArray);
      }

      /// <summary>
      /// Perform self test on power supply system
      /// </summary>
      /// <param name="name"></param>
      /// <returns></returns>
      private void PerformPowerSupplySelfTestTask(IPowerSupplySystem powerSystem)
      {
         SelfTestResult result = SelfTestResult.Pass;
         Exception exception = null;
         string powerSystemWithFailedSelfTest = String.Empty;

         _logger?.Debug($"{this.GetType().Name}::{System.Reflection.MethodBase.GetCurrentMethod().Name}() for {powerSystem.Name} is running...");

         try
         {
            result = powerSystem.PerformSelfTest();

            if (result == SelfTestResult.Fail)
            {
               powerSystemWithFailedSelfTest = powerSystem.Name;
            }
         }
         catch (Exception ex)
         {
            exception = ex;
         }

         lock (_powerSupplySelfTestSyncOjb)
         {
            if (String.IsNullOrEmpty(_powerSystemWithFailedSelfTest) && _exceptionFromSuportThread == null)
            {
               if (!String.IsNullOrEmpty(powerSystemWithFailedSelfTest))
                  _powerSystemWithFailedSelfTest = powerSystemWithFailedSelfTest;
               else if (exception != null)
               {
                  _exceptionFromSuportThread = exception;
               }
            }
         }

         _logger?.Debug($"{this.GetType().Name}::{System.Reflection.MethodBase.GetCurrentMethod().Name}() for {powerSystem.Name} is exiting...");
      }

      /// <summary>
      /// Disable the power supply display interface.
      /// </summary>
      /// <param name="powerSystem">The name of the system to disable, as defined in the config file</param>
      public void DisplayDisable(string powerSystem)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Could not find power system: " + powerSystem);
         }

         _powerSystemNameToObjectMap[powerSystem.ToUpper()].DisplayEnabled = false;
      }

      /// <summary>
      /// Enable the power supply display interface.
      /// </summary>
      /// <param name="powerSystem">The name of the system to disable, as defined in the config file</param>
      public void DisplayEnable(string powerSystem)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Could not find power system: " + powerSystem);
         }

         _powerSystemNameToObjectMap[powerSystem.ToUpper()].DisplayEnabled = true;
      }

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

         GC.SuppressFinalize(this);
      }

      /// <summary>
      /// Get all of the power module names
      /// </summary>
      /// <returns>Array of the system/module names.</returns>
      public List<string> GetPowerModuleList()
      {
         List<string> powerModules = new List<string>();

         foreach (KeyValuePair<string, IPowerSupplySystem> item in _powerModuleNameToObjectMap)
         {
            powerModules.Add(item.Key);
         }

         return powerModules;
      }

      /// <summary>
      /// Get the power module names for a given system
      /// </summary>
      /// <returns>Array of the system/module names.</returns>
      public List<string> GetPowerSupplyList(string powerSystem)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Unknown power system: " + powerSystem);
         }

         return _powerSystemNameToObjectMap[powerSystem.ToUpper()].GetModuleNames();
      }//GetPowerSupplyModuleInfoDict

      /// <summary>
      /// Get the dictionary that contains configuration information for each module
      /// </summary>
      /// <returns></returns>
      public Dictionary<string, PowerSupplyModuleInfo> GetPowerSupplyModuleInfoDict(string powerSystem)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Unknown power system: " + powerSystem);
         }

         return _powerSystemNameToObjectMap[powerSystem.ToUpper()].GetPowerSupplyModuleInfoDict(powerSystem);
      }

      /// <summary>
      /// Gets the Power System names.
      /// </summary>
      /// <returns>Array of power system names, as defined in the config file</returns>
      public List<string> GetPowerSupplySystemList()
      {
         List<string> powerSystems = new List<string>();

         foreach (KeyValuePair<string, IPowerSupplySystem> item in _powerSystemNameToObjectMap)
         {
            powerSystems.Add(item.Key);
         }

         return powerSystems;
      }

      /// <summary>
      /// Query the supply and returns the programed OCP. Should match what was in the definition file.
      /// </summary>
      /// <param name="moduleName">The name of the power supply.</param>
      /// <returns>The programmed overcurrent protection value</returns>
      public double GetOverCurrentProtection(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].GetOverCurrentSetting(moduleName);
      }

      /// <summary>
      /// Query the supply and returns the programed OVP. Should match what was in the definition file.
      /// </summary>
      /// <param name="moduleName">The name of the power supply.</param>
      /// <returns>The programmed overvoltage protection value.</returns>
      public double GetOverVoltageProtection(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].GetOverVoltageSetting(moduleName);
      }

      /// <summary>
      /// Query the supply and returns the programed slew rate
      /// </summary>
      /// <param name="moduleName"></param>
      /// <returns>The programmed slew rate</returns>
      public double GetSlewRate(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].GetSlewRate(moduleName);
      }

      /// <summary>
      /// Query the system that contains the passed in module and returns the system error code.
      /// </summary>
      /// <param name="moduleName">The module to query.</param>
      /// <param name="errorCode">The error code.</param>
      /// <returns>The string form of the error code. Will be empty string if there is no error.</returns>
      public string GetSystemErrorCode(string moduleName, out int errorCode)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].GetErrorCode(out errorCode);
      }

      /// <summary>
      /// Query the supply and returns the programmed voltage setpoint.
      /// After construction, this should match what was in the definition file.
      /// The host may override the value by calling SetVoltageSetpoint().
      /// </summary>
      /// <param name="moduleName">The name of the power supply.</param>
      /// <returns>The programmed voltage setpoint.</returns>
      public double GetVoltageSetpoint(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].GetVoltageSetting(moduleName);
      }

      /// <summary>
      /// Query the supply and returns true if output is enabled.
      /// </summary>
      /// <param name="moduleName">The name of the power supply.</param>
      /// <returns>True if output is enabled, false if it is not enabled.</returns>
      public bool IsPowerSupplyOn(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].IsOutputOn(moduleName);
      }

      /// <summary>
      /// Sends a SCPI command to the power system and reads the response
      /// </summary>
      /// <param name="powerSystem">The name of the power system.</param>
      /// <param name="command">The SCPI command to send</param>
      /// <returns></returns>
      public string IOQuery(string powerSystem, string command)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Could not find power system: " + powerSystem);
         }

         return _powerSystemNameToObjectMap[powerSystem.ToUpper()].IOQuery(command);
      }

      /// <summary>
      /// Sends a SCPI command to the power system
      /// </summary>
      /// <param name="powerSystem">The name of the power system.</param>
      /// <param name="command">The SCPI command to send</param>
      public void IOWrite(string powerSystem, string command)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Could not find power system: " + powerSystem);
         }

         _powerSystemNameToObjectMap[powerSystem.ToUpper()].IOWrite(command);
      }

      /// <summary>
      /// Read the current of a module.
      /// </summary>
      /// <param name="moduleName">The module to read.</param>
      /// <returns>The current (Amps).</returns>
      public double MeasureCurrent(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].MeasureCurrent(moduleName);
      }

      /// <summary>
      /// Query the supply for its voltage.
      /// </summary>
      /// <param name="moduleName">The module to read.</param>
      /// <returns>The voltage (Volts).</returns>
      public double MeasureVoltage(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].MeasureVoltage(moduleName);
      }

      /// <summary>
      /// Disable the output of the power supply.
      /// </summary>
      /// <param name="moduleName">The name of the power supply module.</param>
      public void OutputDisable(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].Off(moduleName);
      }

      /// <summary>
      /// Enable the output of the power supply.
      /// </summary>
      /// <param name="moduleName">The name of the module to enable.</param>
      public void OutputEnable(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].On(moduleName);
      }

      /// <summary>
      /// Control the power supply internal mechanical relay state
      /// </summary>
      /// <param name="shallWeConnect">True to connect, false to disconnect</param>
      public void MechanicalRelayOutputControl(string moduleName, bool shallWeConnect)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].MechanicalRelayOutputControl(moduleName, shallWeConnect);
      }

      /// <summary>
      /// Query all power supply data in a single call.
      /// </summary>
      /// <param name="moduleName">The name of the module to query.</param>
      /// <param name="voltage">The voltage that was read.</param>
      /// <param name="voltageSetpoint">The voltage setpoint that was read.</param>
      /// <param name="current">The current that was read.</param>
      /// <param name="isOutputOn">The output status. True if output is enabled, false if output is disabled.</param>
      /// <param name="faultStatus">The value of the fault status register. See power supply docs for meaning (0 means no fault).</param>
      /*public void ReadPowerData(string moduleName, out double voltage, out double voltageSetpoint, out double current, out bool isOutputOn, out int faultStatus)
		{
		   if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
		   {
			  throw new Exception("PowerSupplyManager::ReadPowerData() - could not find module: " + moduleName);
		   }

		   _powerModuleNameToObjectMap[moduleName.ToUpper()].ReadPowerData(moduleName, out voltage, out voltageSetpoint, out current, out isOutputOn, out faultStatus);
		}*/

      /// <summary>
      /// Query all power supply data in a single call.
      /// </summary>
      /// <param name="moduleName">The name of the module to query.</param>
      public PowerData ReadPowerData(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].ReadPowerData(moduleName);
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="moduleName"></param>
      /// <returns></returns>
      public int ReadProtectionStatus(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         return _powerModuleNameToObjectMap[moduleName.ToUpper()].ReadProtectionStatus(moduleName);
      }

      /// <summary>
      /// Resets the setpoint voltage to the value contained in the ini file
      /// </summary>
      /// <param name="moduleName">The module to reset</param>
      public void SetInitialVoltage(string moduleName)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].SetInitialVoltage(moduleName);
      }

      /// <summary>
      /// Every power supply gets its voltage set to what was in the ini file
      /// </summary>
      public void SetInitialVoltageAll()
      {
         List<string> powerModules = GetPowerModuleList();
         foreach (string powerModule in powerModules)
         {
            SetInitialVoltage(powerModule);
         }
      }

      /// <summary>
      /// Sets the slew rate in volts per second
      /// </summary>
      /// <param name="moduleName">The name of the power module</param>
      /// <param name="slewRate">slew in volts per second</param>
      /*public void SetSlewRate(string moduleName, double slewRate)
		{
		   if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
		   {
			  throw new Exception("PowerSupplyManager::SetSlewRate() - could not find module: " + moduleName);
		   }

		   _powerModuleNameToObjectMap[moduleName.ToUpper()].SetSlewRate(moduleName, slewRate);
		}*/

      /// <summary>
      /// 
      /// </summary>
      /// <param name="moduleName"></param>
      /// <param name="ocpValue"></param>
      public void SetOverCurrentProtection(string moduleName, double ocpValue)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].SetOverCurrentProtection(moduleName, ocpValue);
      }

      /// <summary>
      /// 
      /// </summary>
      /// <param name="moduleName"></param>
      /// <param name="ovpValue"></param>
      public void SetOverVoltageProtection(string moduleName, double ovpValue)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].SetOverVoltageProtection(moduleName, ovpValue);
      }

      /// <summary>
      /// Set the setpoint voltage of a module.
      /// </summary>
      /// <param name="moduleName">The module to set.</param>
      /// <param name="setpointVoltage">The setpoint voltage.</param>
      public void SetVoltageSetpoint(string moduleName, double setpointVoltage)
      {
         if (_powerModuleNameToObjectMap.ContainsKey(moduleName.ToUpper()) == false)
         {
            throw new Exception("Could not find module: " + moduleName);
         }

         _powerModuleNameToObjectMap[moduleName.ToUpper()].SetVoltageSetpoint(moduleName, setpointVoltage);
      }

      /// <summary>
      /// Disable the power system watchdog.
      /// </summary>
      /// <param name="powerSystem">The power system to act on.</param>
      public void WatchdogDisable(string powerSystem)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Could not find power system: " + powerSystem);
         }

         _powerSystemNameToObjectMap[powerSystem.ToUpper()].WatchdogDisable();
      }

      /// <summary>
      /// Enable the power system watchdog.
      /// </summary>
      /// <param name="powerSystem">The system to act on.</param>
      /// <param name="timeInSeconds">The number of seconds for the watchdog.</param>
      public void WatchdogEnable(string powerSystem, uint timeInSeconds)
      {
         if (_powerSystemNameToObjectMap.ContainsKey(powerSystem.ToUpper()) == false)
         {
            throw new Exception("Could not find power system: " + powerSystem);
         }

         _powerSystemNameToObjectMap[powerSystem.ToUpper()].WatchdogEnable(timeInSeconds);
      }

      #endregion

      #region PrivateClassFunctions
      /// <summary>
      /// The Finalizer
      /// </summary>
      ~PowerSupplyMeasurementManager()
      {
         Dispose(false);
      }

      /// <summary>
      /// Dispose of this object.
      /// </summary>
      /// <param name="disposing">True = currently disposing, False = not disposing.</param>
      protected virtual void Dispose(bool disposing)
      {
         if (disposing)
         {
            _logger.Debug($"Entering {this.GetType().Name}::{System.Reflection.MethodBase.GetCurrentMethod().Name}() method...");

            // dispose of the other resources
            foreach (KeyValuePair<string, IPowerSupplySystem> entry in _powerSystemNameToObjectMap)
            {
               try
               {
                  entry.Value.Shutdown();
               }
               catch (Exception ex)
               {
                  _logger.Error(ex.Message + "\r\n" + ex.StackTrace);
               }
            }
         }
      }
      #endregion
   }
}