using System;
using HRD.Core;

namespace HRD.Core
{
	public class Mediator
	{
		private IAVLTree _avlTree;
		private ICircularList _circleList;
		private ITreeList _treeList;
		private IResultHandler _resultHandler;

		#region Properties

		public IAVLTree avlTree 
		{
			set 
			{
				_avlTree = value;
			}
		}

		public ICircularList circleList 
		{
			set 
			{
				_circleList = value;
			}
		}
		public ITreeList treeList 
		{
			set 
			{
				_treeList = value;
			}
		}

		public IResultHandler resultHandler 
		{
			set 
			{
				_resultHandler = value;
			}
		}

		#endregion

		public void Init(int n)
		{
			for(int i = 0; i<n; i++)
				_circleList.insertNode();
			
			ChessStep c = _circleList.Initialize();
			_treeList.ClearAll();
			_avlTree.DestroyTree();

			_treeList.insertNode(c);
			_avlTree.Insert(c.layout);
			_circleList.mediator = this;
		}

		public void Release()
		{
			_circleList.ClearAll();
			_treeList.ClearAll();
			_avlTree.DestroyTree();
		}

		public void CheckStep(ChessStep cStep)
		{
			try
			{
				if(_avlTree.Insert(cStep.layout))
				{
					_circleList.ConfirmAllocation();
					_treeList.insertNode(cStep);
				}
			}
			catch
			{
			}
		}

		public Layout AllocateLayout()
		{
			return _circleList.AllocateLayout();
		}

		public void Finished(ChessStep cStep)
		{
			_circleList.Stop();
			ChessStep[] s = _treeList.TraceResult(cStep);

			_resultHandler.HandleResult(s);
			return;
		}

		public bool BeginProcess()
		{
			return _circleList.BeginProcess();
		}

		public void Stop()
		{
			_circleList.Stop();
		}

		public void MoveCurrentToNext()
		{
			_treeList.MoveCurrentToNext();
		}

		public void HandleInfo(int currentStep)
		{
			_resultHandler.HandleInfo(currentStep);
		}
	}
}