using System;
using sharp.trading;
using System.IO;
using System.Timers;
using System.Threading;
using System.Collections.Generic;

namespace sharp.tradebot
{
	public delegate void PeriodicWorker();

	public class TradingBotEnvironment : MarshalByRefObject
	{
		public string BaseDataDirectory { get; private set; }
		public TradingConnection TradingConnection { get; private set; }

		Thread periodicsThread;
		bool contPeriodics = true;

		List<PeriodicTask> periodicTasks = new List<PeriodicTask>();


		public TradingBotEnvironment(TradingConnection connection,string baseDataDirectory){
			BaseDataDirectory = baseDataDirectory;
			TradingConnection = connection;
			periodicsThread = new Thread(periodics);
			periodicsThread.Start();
		}

		public void RegisterPeriodic(PeriodicWorker worker,int timeout){
			lock (periodicTasks){
				periodicTasks.Add(new PeriodicTask(timeout,worker));
			}
		}

		public void UnregisterPeriodic(PeriodicWorker worker)
		{
			lock (periodicTasks)
			{
				foreach (PeriodicTask ptask in periodicTasks.ToArray()){
					if (ptask.worker == worker){
						periodicTasks.Remove(ptask);
					}
				}
			}
		}

		public void Stop(){
			lock (this){
				this.contPeriodics = false;
			}
			this.periodicsThread.Join();
		}

		private void periodics(){

			Thread.Sleep(1000);

			while (true){
				
				lock (this){
					if (!contPeriodics)
					{
						break;
					}
				}

				lock (periodicTasks){
					foreach (PeriodicTask ptask in periodicTasks){
						ptask.Check();
					}
				}

				Thread.Sleep(250);
			}
		}

		class PeriodicTask {
			public DateTime lastRun;
			public Int64 interval;
			public PeriodicWorker worker;

			public PeriodicTask(Int64 interval,PeriodicWorker worker){
				this.worker = worker;
				this.interval = interval;
				this.lastRun = DateTime.Now;
			}

			public void Check()
			{
				if ((this.lastRun == null) || ((DateTime.Now - this.lastRun).TotalSeconds >= this.interval))
				{
					this.lastRun = DateTime.Now;
					try
					{
						lock (this.worker.Target){
							if (!typeof(TradingBot).IsInstanceOfType(this.worker.Target) || ((TradingBot)this.worker.Target).IsPrepared){
								try {
                                    this.worker();
								} catch (Exception e){
									Console.WriteLine("Exception: {0}",e);
								}
							}
						}
					} catch (Exception e){
						Console.WriteLine("Exception: {0}",e.ToString());
					}
				}
			}


		}

	}
}