using MarketData.MarketDataModel;
using MarketData.DataAccess;
using MarketData.Utils;

namespace MarketData.Helper
{
  public class AnalystRatingsThreadHelper : ThreadHelper
  {
    public AnalystRatingsThreadHelper(String symbol, DateTime modified, DateTime maxAnalystRatingsDate, ManualResetEvent resetEvent)
    {
      Symbol = symbol;
      Modified = modified;
      ResetEvent = resetEvent;
      MaxAnalystRatingsDate = maxAnalystRatingsDate;
    }
    
    public DateTime MaxAnalystRatingsDate { get; private set; }
  }

// ****************************************************************************************************************************************

  public class AnalystRatingsMarketDataHelper : MarketDataHelperBase<String>
  {
    private static int MaxThreads = 10;
    private static int SLEEP_TIME_MS = 500;

    public AnalystRatingsMarketDataHelper()
    {
    }

    public bool UpdateAnalystRatings()
    {
      return false;
    }

    public bool UpdateMissingAnalystRatings()
    {
      Profiler profiler = new Profiler();
      try
      {
        List<String> symbols = PricingDA.GetSymbols();
        DateTime maxRatingsDate = AnalystRatingsDA.GetMaxDateNoZacks();
        Queue = symbols;
    //    ShuffleQueue();   // shuffle up the symbols
        Index = -1;
        ManualResetEvent[] resetEvents = new ManualResetEvent[MaxThreads];
        for (int eventIndex = 0; eventIndex < resetEvents.Length; eventIndex++) resetEvents[eventIndex] = new ManualResetEvent(true);
        MDTrace.WriteLine(String.Format("Queuing UpdateMissingAnalystRatings fetches ..."));
        DateTime modified = DateTime.Now;
        while (true)
        {
          ManualResetEvent[] availableEvents = GetAvailableEvents(resetEvents);
          ManualResetEvent[] busyEvents = GetBusyEvents(resetEvents);
          if (null == PeekQueueItem() && 0 == busyEvents.Length)
          {
            MDTrace.WriteLine(LogLevel.DEBUG, String.Format("UpdateMissingAnalystRatings queue contains {0} items, busy events {1}, all done.", 0, busyEvents.Length));
            break;
          }
          for (int index = 0; index < availableEvents.Length; index++)
          {
            String symbol = GetQueueItem();
            if (null != symbol)
            {
              availableEvents[index].Reset();
              AnalystRatingsThreadHelper analystRatingsThreadHelper = new AnalystRatingsThreadHelper(symbol, maxRatingsDate, modified, availableEvents[index]);
              ThreadPool.QueueUserWorkItem(ThreadPoolCallbackUpdateMissingAnalystRating, analystRatingsThreadHelper);
              try { Thread.Sleep(SLEEP_TIME_MS); } catch (Exception) {; }
            }
            else
            {
              busyEvents = GetBusyEvents(resetEvents);
              if (busyEvents.Length != availableEvents.Length)
              {
                ManualResetEvent[] resizedEvents = new ManualResetEvent[busyEvents.Length];
                Array.Copy(busyEvents, resizedEvents, busyEvents.Length);
                resetEvents = resizedEvents;
              }
              break;
            }
          }    // for
          MDTrace.WriteLine(LogLevel.DEBUG, "UpdateMissingAnalystRatings waiting for free slots...");
          if (resetEvents.Length > 0) WaitHandle.WaitAny(resetEvents);
          if (null == PeekQueueItem()) resetEvents = ResizeEvents(resetEvents);
        }    // while
        MDTrace.WriteLine(LogLevel.DEBUG, "UpdateMissingAnalystRatings completed.");
        return true;
      }
      finally
      {
        MDTrace.WriteLine(LogLevel.DEBUG, String.Format("[UpdateMissingAnalystRatings]Done, total took {0}(ms)", profiler.End()));
      }
    }

    public void ThreadPoolCallbackUpdateMissingAnalystRating(Object analystRatingThreadHelperContext)
    {
      AnalystRatingsThreadHelper threadHelper = (AnalystRatingsThreadHelper)analystRatingThreadHelperContext;
      try
      {
        MDTrace.WriteLine(LogLevel.DEBUG, String.Format("Load missing analyst rating, Thread {0} started for {1}...", Thread.CurrentThread.ManagedThreadId, threadHelper.Symbol));
        UpdateMissingAnalystRatingEx(threadHelper.Symbol, threadHelper.MaxAnalystRatingsDate, threadHelper.Modified);
        MDTrace.WriteLine(LogLevel.DEBUG, String.Format("Load missing analyst rating, Thread {0} ended for {1}", Thread.CurrentThread.ManagedThreadId, threadHelper.Symbol));
      }
      finally
      {
        threadHelper.ResetEvent.Set();
      }
    }

    public void UpdateMissingAnalystRatingEx(String symbol, DateTime maxAnalystRatingsDate, DateTime modified)
    {
      try
      {
        AnalystRatings analystRatings = MarketDataHelper.GetAnalystRatingsMarketBeat(symbol);
        if (null == analystRatings || 0 == analystRatings.Count)
        {
          return;
        }

        analystRatings = new AnalystRatings((from AnalystRating analystRating in analystRatings where analystRating.Date >= maxAnalystRatingsDate.Date select analystRating).ToList());
        AnalystRatings duplicateList = new AnalystRatings();
        foreach (AnalystRating analystRating in analystRatings)
        {
          if (AnalystRatingsDA.ContainsAnalystRating(analystRating))
          {
            MDTrace.WriteLine(LogLevel.DEBUG, String.Format("Already have analyst rating for {0} on {1} from brokerage firm {2}", analystRating.Symbol, analystRating.Date.ToShortDateString(), analystRating.BrokerageFirm));
            duplicateList.Add(analystRating);
          }
        }
        analystRatings = new AnalystRatings(analystRatings.Except(duplicateList).ToList());
        foreach (AnalystRating analystRating in analystRatings)
        {
          MDTrace.WriteLine(LogLevel.DEBUG, String.Format("Inserting Analyst Rating for {0} on {1} from brokerage firm {2}", analystRating.Symbol, analystRating.Date.ToShortDateString(), analystRating.BrokerageFirm));
        }
        AnalystRatingsDA.InsertAnalystRatings(analystRatings);
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG, $"UpdateMissingAnalystRatingEx : Exception {exception.ToString()}");
      }
    }

  }
}