using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using NLog;
using Xylem.Common.Hardware.WaterMeter.WaterMeterCore.BatchActions;
using Xylem.Common.Hardware.WaterMeter.WaterMeterRegisters;
using Xylem.Common.Utils.Logging;

namespace Xylem.Common.Hardware.WaterMeter.WaterMeterCore
{

    /// <summary>
    /// Can hold various <see cref="IMeter"/>s and hold connection record to relieve the meter.
    /// Every contact with meter has to go over <see cref="MeterBatch"/> even if you have only one.
    /// </summary>
    [Guid("CC3D4FEF-3EA6-47B2-9916-6F9AD4AE1F4B"),
     ComVisible(true),
    ClassInterface(ClassInterfaceType.None),
     ComSourceInterfaces(typeof(IMeterBatch))]
    public class MeterBatch : IMeterBatch
    {
        private readonly List<MeterTypeRegisters> _meterTypeRegistersCollection = new List<MeterTypeRegisters>(); 
        private readonly ILogger _logger;
        private readonly String _sourceLocation;

        /// <summary>
        ///     ctor
        /// </summary>
        public MeterBatch(String sourceLocation = "")
        {
            _sourceLocation = sourceLocation;
            _logger = NLogHelper.CreateOrGetLogger("MeterBatch");

            _logger.Info("Meter batch created");
        }

        private readonly List<IMeter> _listOfMeters = new List<IMeter>();
        /// <summary>
        ///     Registered list of meters
        /// </summary>
        public List<IMeter> ListOfMeters => _listOfMeters;


        /// <inheritdoc />
        public void AddMeter(IMeter meterToAdd)
        {
            _logger.Info($"Slot:{meterToAdd.Slot} - Meter assigned to batch");

            var add = meterToAdd as IWaterMeterWithRegisters;
            if (add != null)
            {
                AddMeterTypeToBatch(add);
            }
 
            _listOfMeters.Add(meterToAdd);

            meterToAdd.ConnectMeter();
        }

        private void AddMeterTypeToBatch(IWaterMeterWithRegisters meterToAdd)
        {
            if (_meterTypeRegistersCollection.All(mtr => mtr.MeterType == meterToAdd.GetType()))
            {
                _meterTypeRegistersCollection.Add(new MeterTypeRegisters(meterToAdd.GetType()));

                
                meterToAdd.LoadConfiguration(!string.IsNullOrEmpty(_sourceLocation) ? _sourceLocation :  Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)));
                
            }
        }


        //private void AddMeterTypeToBatch(IWaterMeterWithRegisters meterToAdd)
        //{
        //    if (_meterTypeRegistersCollection.All(mtr => mtr.MeterType == meterToAdd.GetType()))
        //    {
        //        _meterTypeRegistersCollection.Add(new MeterTypeRegisters(meterToAdd.GetType(),
        //            meterToAdd.LoadConfiguration()));
        //    }

        //    List<IRegister> allRegisters =
        //        _meterTypeRegistersCollection.First(f => f.MeterType == meterToAdd.GetType()).Registers;
        //    if (allRegisters == null || !allRegisters.Any())
        //    {
        //        throw new ApplicationException($"No valid RegisterConfiguration found for meter type {meterToAdd.GetType()}. Check Configuration");
        //    }
        //    meterToAdd.SetConfigRegisterDefinitions(allRegisters);

        //}

        /// <inheritdoc />
        public IMeter[] GetCurrentMeter()
        {
            if (_listOfMeters == null || _listOfMeters.Count == 0)
            {
                return new IMeter[0];
            }
            return _listOfMeters.ToArray();


        }
        /// <inheritdoc />
        public Int32[] GetCurrentMeterSlots()
        {
            if (_listOfMeters == null || _listOfMeters.Count == 0)
            {
                return new Int32[0];
            }

            var ret = new Int32[_listOfMeters.Count];
            for (var i = 0; i < _listOfMeters.Count; i++)
            {
                ret[i] = _listOfMeters[i].Slot;
            }

            return ret;


        }

        /// <inheritdoc />
        public void RemoveMeter(IMeter meterToRemove)
        {
            meterToRemove?.DisposeMeter();
            _listOfMeters.Remove(meterToRemove);
            _logger.Info($"Slot:{ meterToRemove?.Slot} - Meter removed from batch");
        }

        /// <inheritdoc />
        public void MetersLogin()
        {
            _logger.Info("Batch call Login to all meters");
            var batchCall = new BatchCallLogin();
            batchCall.RunAction(ListOfMeters);
        }


        /// <inheritdoc />
        public void MetersInit()
        {
            _logger.Info("Batch call to init  all meters");
            var batchCall = new BatchCallConnectMeter();
            batchCall.RunAction(ListOfMeters);
        }

        /// <inheritdoc />
        public void MetersInitCalibration()
        {
            _logger.Info("Batch call to init calibration all meters");
            var batchCall = new BatchCallInitCalibration();
            batchCall.RunAction(ListOfMeters);
        }

        /// <inheritdoc />
        public void MetersInitMeasurement()
        {
            _logger.Info("Batch call to init measurement all meters");
            var batchCall = new BatchCallInitMeasurement();
            batchCall.RunAction(ListOfMeters);
        }

        /// <inheritdoc />
        public void MetersSaveCalculatedCalibration()
        {
            _logger.Info("Batch call to save calculated calibration on all meters");
            var batchCall = new BatchCallSetCalibrationFactor();
            batchCall.RunAction(ListOfMeters);
        }


        /// <inheritdoc />
        public void MetersStartCalibration()
        {
            _logger.Info("Batch call to start calibration on all meters");
            var batchCall = new BatchCallStartCalibration();
            batchCall.RunAction(ListOfMeters);
        }


        /// <inheritdoc />
        public void MetersStartMeasurement()
        {
            _logger.Info("Batch call to start measurement on all meters");
            var batchCall = new BatchCallStartMeasurement();
            batchCall.RunAction(ListOfMeters);
        }


        /// <inheritdoc />
        public void MetersStopCalibration()
        {
            _logger.Info("Batch call to stop calibration on all meters");
            var batchCall = new BatchCallStopCalibration();
            batchCall.RunAction(ListOfMeters);
        }

        /// <inheritdoc />
        public void MetersStopMeasurement()
        {
            _logger.Info("Batch call to stop measurement on all meters");
            var batchCall = new BatchCallStopMeasurement();
            batchCall.RunAction(ListOfMeters);
        }


        /// <inheritdoc />
        public IMeter GetMeter(Int32 slot)
        {
            return ListOfMeters.Find(f => f.Slot == slot);
        }

        /// <inheritdoc />
        public void RemoveAllMeters()
        {
            try
            {
                foreach (var item in ListOfMeters)
                {
                    _logger.Info($"Slot:{ item.Slot} - Meter disposed");
                    item.DisposeMeter();
                }
                ListOfMeters.Clear();
            }
            catch (Exception ex)
            {
                _logger.Error(ex, "Error on RemoveAllMeters, prop. not all comports are closed");
            }
          

        }

        /// <inheritdoc />
        public void Dispose()
        {
            try
            {
                _logger.Info("Dispose batch");
                RemoveAllMeters();
                GC.Collect();
            }
            catch (Exception ex)
            {
                _logger.Error(ex, "Error on batch disposing, possible comport error");
            }
        }

        public void DisposeTestBench()
        {
            _logger.Info("Dispose batch make sure green LED is off");
            var batchCall = new BatchCallStopMeasurement();
            batchCall.RunAction(ListOfMeters);
        }
    }
}