using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using MarketData.MarketDataModel;
using MarketData.DataAccess;
using MarketData.Utils;

namespace MarketData.Helper
{
  public class SECFilingMarketDataHelper
  {
    private static int MaxThreads = 5;    // 10 requests per second is what is allowable under SEC.GOV.  We'll request 5 symbols per batch.  Note:each request may contain subrequests
    private static int WAIT_TIME_MS=1000;  // wait between requests
    private List<String> symbols;
    private int currentIndex = 0;

    public SECFilingMarketDataHelper()
    {
    }
		public bool UpdateSECFilings(List<String> symbols)
		{
      Profiler profiler=new Profiler();

			try
			{
				this.symbols=symbols;
				currentIndex=0;
				while (true)
				{
					List<String> queueSymbols = GetQueueSymbols();
					if (null == queueSymbols || 0 == queueSymbols.Count) break;
					ManualResetEvent[] resetEvents = new ManualResetEvent[queueSymbols.Count];
					for (int eventIndex = 0; eventIndex < resetEvents.Length; eventIndex++)
					{
						resetEvents[eventIndex] = new ManualResetEvent(false);
					}
					for (int index = 0; index < queueSymbols.Count; index++)
					{
						ThreadHelper threadHelper = new ThreadHelper(queueSymbols[index],resetEvents[index]);
						ThreadPool.QueueUserWorkItem(ThreadPoolCallbackUpdateSECFiling, threadHelper);
            try { Thread.Sleep(WAIT_TIME_MS); } catch(Exception) { ;}      // SEC has a traffic limit
          }
					MDTrace.WriteLine(LogLevel.DEBUG,"Load SEC Filings, waiting for queued items to complete.");
					WaitHandle.WaitAll(resetEvents);
				}
				return true;
			}
			catch(Exception exception)
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[UpdateSECFilings]Exception {0}",exception.ToString()));
				return false;
			}
			finally
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[UpdateSECFilings]End, total took {0}(ms)",profiler.End()));
			}
		}
		public bool UpdateSECFilings()
		{
			Profiler profiler=new Profiler();
			try
			{
        List<String> watchListSymbols = WatchListDA.GetWatchList("Valuations");   //  get the current watchlist symbols
        List<String> secFilingSymbols=SECFilingDA.GetDistinctFilingSymbols();   // get the current SEC filing symbols
        symbols=watchListSymbols.Union(secFilingSymbols).Distinct().ToList();   // use the union of the two
				currentIndex = 0;
				while (true)
				{
					List<String> queueSymbols = GetQueueSymbols();
					if (null == queueSymbols || 0 == queueSymbols.Count) break;
					ManualResetEvent[] resetEvents = new ManualResetEvent[queueSymbols.Count];
					for (int eventIndex = 0; eventIndex < resetEvents.Length; eventIndex++)
					{
						resetEvents[eventIndex] = new ManualResetEvent(false);
					}
					for (int index = 0; index < queueSymbols.Count; index++)
					{
						ThreadHelper threadHelper = new ThreadHelper(queueSymbols[index],resetEvents[index]);
						ThreadPool.QueueUserWorkItem(ThreadPoolCallbackUpdateSECFiling, threadHelper);
            try { Thread.Sleep(WAIT_TIME_MS); }catch(Exception) { ;}           // SEC has a traffic limit
          }
					MDTrace.WriteLine(LogLevel.DEBUG,"Load SEC Filings, waiting for queued items to complete.");
					WaitHandle.WaitAll(resetEvents);
				}
				return true;
			}
			catch(Exception exception)
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[UpdateSECFilings]Exception {0}",exception.ToString()));
				return false;
			}
			finally
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[UpdateSECFilings]End, total took {0}(ms)",profiler.End()));
			}
		}
    private List<String> GetQueueSymbols()
    {
      List<String> queueSymbols = new List<String>();
      int index = currentIndex;
      for (; index < currentIndex + MaxThreads && index < symbols.Count; index++)
      {
        queueSymbols.Add(symbols[index]);
      }
      currentIndex = index;
      return queueSymbols;
    }
    public void ThreadPoolCallbackUpdateSECFiling(Object threadHelperContext)
    {
      ThreadHelper threadHelper = (ThreadHelper)threadHelperContext;
			try
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Load SEC Filing, Thread {0} started for {1}...", Thread.CurrentThread.ManagedThreadId, threadHelper.Symbol));
				UpdateSECFiling(threadHelper.Symbol);
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Load SEC Filing, Thread {0} ended for {1}", Thread.CurrentThread.ManagedThreadId, threadHelper.Symbol));
			}
			finally
			{
			  threadHelper.ResetEvent.Set();
			}
    }
    public static void UpdateSECFiling(String symbol)
    {
      try
      {
        MDTrace.WriteLine(LogLevel.DEBUG,"UpdateSECFiling '"+symbol+"'");
        String cik = PricingDA.GetCIKForSymbol(symbol);
        if (null == cik)
        {
          MDTrace.WriteLine(LogLevel.DEBUG,"No CIK for symbol '" + symbol + "'");
          return;
        }
        MDTrace.WriteLine(LogLevel.DEBUG,"UpdateSECFiling for symbol '" + symbol + "'");
        SECFilings secFilings = MarketDataHelper.GetSECFilings(symbol, cik);
        if (null != secFilings)
        {
          for (int index = 0; index < secFilings.Count; index++)
          {
            StringBuilder sb = new StringBuilder();
            SECFiling secFiling = secFilings[index];
            sb.Append(secFiling.Symbol).Append(",");
            sb.Append(Utility.DateTimeToStringYYYYHMMHDD(secFiling.FilingDate)).Append(",");
            sb.Append(secFiling.SECAccessionNumber).Append(",");
            sb.Append(secFiling.Sequence);
            MDTrace.WriteLine(LogLevel.DEBUG,sb.ToString());
          }
          MDTrace.WriteLine(LogLevel.DEBUG,"Got "+secFilings.Count+" filings for symbol '"+symbol+"'");
          SECFilingDA.InsertOrUpdateSECFilings(secFilings);
        }
        return;
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,exception);
        return;
      }
    }
  }
}