using System;
using System.Collections.Generic;
using System.Linq;
using DTS.Common.Interface.DASFactory;
using DTS.Common.Interface.DASFactory.Download;
using DTS.Common.Utilities.Logging;
using DTS.DASLib.Service;

namespace DTS.Common.SerializationPlus
{
    public class EventInfoAggregate : IEventInfoAggregate
    {
        public string EventId { get; set; }
        public string EventDescription { get; set; }
        public double DurationSeconds { get; set; }
        public string GUID { get; set; }
        public bool HasBeenDownloaded { get; set; }
        public bool WasTriggered { get; set; }
        public int NumberOfChannels { get; set; }
        public ulong NumberOfSamples { get; set; }
        public ulong NumberOfBytes { get; set; }
        public bool Faulted { get; set; }
        public int EventNumber { get; set; }

        private readonly Dictionary<IDASCommunication, int> _eventIndices = new Dictionary<IDASCommunication, int>();
        private List<IDASCommunication> _das = null;
        private Slice.Control.Event _event;

        public Slice.Control.Event GetEvent(bool bClear)
        {
            if (bClear) { _event = null; }
            return GetEvent();
        }
        public Slice.Control.Event GetEvent()
        {
            if (null == _event)
            {
                _event = new Slice.Control.Event(GetDasList(), this);
            }
            return _event;
        }

        public int GetEventIndex(IDASCommunication idas)
        {
            if (!_eventIndices.ContainsKey(idas))
            {
                APILogger.Log(string.Format("ERROR in GetEventIndex for {0}", idas.SerialNumber));
                return -1;
            }
            return _eventIndices[idas];
        }
        public List<IDASCommunication> GetDasList()
        {
            if (null == _das)
            {
                _das = new List<IDASCommunication>();
                _das.AddRange(_eventIndices.Keys.ToArray());
            }
            return _das;
        }



        public EventInfoAggregate(DownloadReport.EventInfo newEvent)
        {
            EventId = newEvent.TestID;
            EventDescription = newEvent.Description;
            //if newEvent doesn't have modules this will throw an exception, we don't want that
            //so populate the event here with no samples, no duration
            //I discovered this issue while working on
            //15575 No notification if unplug comm cable during downloading on G5
            //if units do come back after disconnecting in the download step their module information may not be populated
            //and would previously crash
            if (newEvent.Modules.Any())
            {
                DurationSeconds = newEvent.Modules[0].PreTriggerSeconds + newEvent.Modules[0].PostTriggerSeconds;
            }
            else
            {
                DurationSeconds = 0;
            }

            GUID = newEvent.TestGUID.ToString();
            HasBeenDownloaded = newEvent.HasBeenDownloaded;
            WasTriggered = newEvent.WasTriggered;
            NumberOfChannels = newEvent.Modules.Sum(s => s.Channels.Length);
            if (newEvent.Modules.Any())
            {
                NumberOfSamples = newEvent.Modules[0].NumberOfSamples;
            }
            else
            {
                NumberOfSamples = 0;
            }

            NumberOfBytes = NumberOfSamples * (ulong)NumberOfChannels * 2;
            Faulted = IsFaulted(newEvent);
            EventNumber = newEvent.EventNumber;
            if (newEvent.Modules.Any())
            {
                _eventIndices.Add(((DASModule)newEvent.Modules[0]).OwningDAS, newEvent.EventNumber);
            }

        }
        /// <summary>
        /// returns true if faulted
		/// </summary>
        private bool IsFaulted(IEventInfo info)
        {
            return 0 != info.FaultFlags || 0 != info.FaultFlagsEx;
        }

        public void Add(IEventInfo newEvent)
        {
            if (newEvent.TestID != EventId)
            {
                APILogger.Log("Warning, expected matching test ids: ", newEvent.TestID, EventId);
            }
            if (newEvent.Description != EventDescription)
            {
                APILogger.Log("Warning, expected matching test descriptions: ", newEvent.Description);
            }
            var duration = newEvent.Modules[0].PreTriggerSeconds + newEvent.Modules[0].PostTriggerSeconds;
            if (duration != DurationSeconds)
            {
                APILogger.Log("Warning, durations don't match: ", duration, DurationSeconds);
                DurationSeconds = Math.Min(DurationSeconds, duration);
            }
            if (newEvent.TestGUID.ToString() != GUID)
            {
                APILogger.Log("Warning, expected test GUIDs to match,", GUID, newEvent.TestGUID.ToString());
            }
            if (newEvent.HasBeenDownloaded != HasBeenDownloaded)
            {
                APILogger.Log("Warning, event has been downloaded from one unit, but not another");
            }
            if (newEvent.WasTriggered != WasTriggered)
            {
                APILogger.Log("Warning, one unit has triggered, but another has not");
            }
            var faulted = IsFaulted(newEvent);
            Faulted = Faulted || faulted;
            if (newEvent.Modules[0].NumberOfSamples != NumberOfSamples)
            {
                APILogger.Log("Warning, expected number of samples to match", NumberOfSamples, newEvent.Modules[0].NumberOfSamples);
                NumberOfSamples = Math.Min(NumberOfSamples, newEvent.Modules[0].NumberOfSamples);
            }
            if (newEvent.EventNumber != EventNumber)
            {
                APILogger.Log("Warning, expected event numbers to match", EventNumber, newEvent.EventNumber);
            }
            NumberOfChannels += newEvent.Modules.Sum(s => s.Channels.Length);
            NumberOfBytes = 2 * (ulong)NumberOfChannels * NumberOfSamples;
            //rather than using .Add we should use index assignment in case there are duplicate keys
            //I've eliminated the duplicate key that happened because of 
            //http://manuscript.dts.local/f/cases/44357/TSR-AIR-GO-given-UDP-auto-discovery-is-disabled-manually-entered-ip-address-failed-matching-the-DAS-and-can-t-ARM
            //but this is better practice
            _eventIndices[((DASModule)newEvent.Modules[0]).OwningDAS] = newEvent.EventNumber;
        }

    }
}