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 DividendHistoryThreadHelper : ThreadHelper
  {
    public DividendHistoryThreadHelper()
    {
    }
    public DividendHistoryThreadHelper(String symbol, ManualResetEvent resetEvent)
    {
      Symbol=symbol;
			ResetEvent=resetEvent;
    }
    public DividendHistoryThreadHelper(String symbol, DateTime modified,ManualResetEvent resetEvent)
    {
      Symbol=symbol;
			Modified=modified;
			ResetEvent=resetEvent;
    }

  }
  public class DividendHistoryMarketDataHelper
  {
    private static int MaxThreads =10;  //2;//(int)ThreadHelperEnum.MaxThreads;
    private static int WAIT_TIME_MS=1000;  // wait between request
    private static Random generator=new Random();
    private List<String> symbols;
    private int currentIndex = 0;
    private static int successHits=0;

    public DividendHistoryMarketDataHelper()
    {
    }
    public static int NextRandom(int min,int max)
    {
      return generator.Next(min,max);
    }
		public bool UpdateDividendHistory(String symbol)
		{
			Profiler profiler=new Profiler();
			try
			{
				symbols = new List<String>();
				symbols.Add(symbol);
				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 DividendHistoryThreadHelper(queueSymbols[index],resetEvents[index]);
						ThreadPool.QueueUserWorkItem(ThreadPoolCallbackLoadDividendHistory, threadHelper);
					}
					MDTrace.WriteLine(LogLevel.DEBUG,"Load dividend history, waiting for queued items to complete.");
					WaitHandle.WaitAll(resetEvents);
				}
				return true;
			}
			finally
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[UpdateDividendHistory]End, total took {0}(ms)",profiler.End()));
			}
		}
		public bool UpdateDividendHistory()
		{
			Profiler profiler=new Profiler();
			try
			{
				symbols = PricingDA.GetSymbols();
				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 DividendHistoryThreadHelper(queueSymbols[index],resetEvents[index]);
						ThreadPool.QueueUserWorkItem(ThreadPoolCallbackLoadDividendHistory, threadHelper);
            try { Thread.Sleep(WAIT_TIME_MS); }catch(Exception) { ;}         
					}
					MDTrace.WriteLine(LogLevel.DEBUG,"Load dividend history, waiting for queued items to complete.");
					WaitHandle.WaitAll(resetEvents);
				}
				return true;
			}
			finally
			{
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("[UpdateDividendHistory]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 ThreadPoolCallbackLoadDividendHistory(Object threadHelperContext)
    {
      DividendHistoryThreadHelper threadHelper = (DividendHistoryThreadHelper)threadHelperContext;
			try
			{ // nasdaq website is very bot sensitive.  this is why all the sleeps and delays here in this block
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Load dividend history, Thread {0} started for {1}...", Thread.CurrentThread.ManagedThreadId, threadHelper.Symbol));
				if(UpdateDividendHistoryEx(threadHelper.Symbol))successHits++;
        //if(successHits>100)
        //{
        //  successHits=0;
        //  MDTrace.WriteLine(LogLevel.DEBUG,"Pausing for 60 seconds.");
        //  Thread.Sleep(60000);
        //}
        //else if(1==DividendHistoryMarketDataHelper.NextRandom(1,20))
        //{
        //  MDTrace.WriteLine(LogLevel.DEBUG,"Pausing for 10 seconds.");
        //  Thread.Sleep(10000);
        //}
        //else if(1==DividendHistoryMarketDataHelper.NextRandom(1,100))
        //{
        //  MDTrace.WriteLine(LogLevel.DEBUG,"Pausing for 30 seconds.");
        //  Thread.Sleep(30000);
        //}
        //else Thread.Sleep(50);
				MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Load dividend history, Thread {0} ended for {1}", Thread.CurrentThread.ManagedThreadId, threadHelper.Symbol));
			}
			finally
			{
			  threadHelper.ResetEvent.Set();
			}
    }
    public static bool UpdateDividendHistoryEx(String symbol)
    {
      MDTrace.WriteLine(LogLevel.DEBUG,"Retrieving dividend history for " + symbol);
      DividendHistory dividendHistory = MarketDataHelper.GetDividendHistory(symbol);
      if (null == dividendHistory || 0 == dividendHistory.Count)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,"Unable to retrieve dividend history for " + symbol);
        return false;
      }
      MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Got {0} dividend history records for {1}", dividendHistory.Count, symbol));
      MDTrace.WriteLine(LogLevel.DEBUG,"Adding...");
      if (DividendHistoryDA.InsertOrUpdate(dividendHistory)) MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Added {0} dividend history records for {1}", dividendHistory.Count, symbol));
      else MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Failed to update dividend history for {0}", symbol));
      return true;
    }
  }
}