/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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

#ifndef __TerrainNodeTree_H__
#define __TerrainNodeTree_H__

#include "terrainfeature/components/TerrainNode.h"
#include "util/mipmaparray.h"
#include "terrainsystem/TerrainDataSource.h"


namespace App
{
	struct NodePos
	{
		int x;
		int y;
	};


	class TerrainNodeTree: public Core::RefCounted
	{
		__DeclareSubClass(TerrainNodeTree, Core::RefCounted);
	public:
		TerrainNodeTree();
		virtual ~TerrainNodeTree();

		/// Reset terrain node tree to default, 0 node
		void Reset();

		/// Get tree's depth. [ 0,GetDepth() )
		SizeT GetDepth() const;

		/// get some level node count in X dir
		SizeT GetRowSize(int depth) const;

		/// get some level node count in Y dir
		SizeT GetColSize(int depth) const;

		/// Using heightMap to rebuild all terrain node. Offset is all node's offset
		void RebuildAllNodes(const GPtr<Terrain::TerrainDataSource>& terrainDataSource);

		/// Get root node, return NULL if invalid
		TerrainNode* GetRootNode();

		/// Get node in pos(row,col) in level, return NULL if invalid
		TerrainNode* GetNode(IndexT row, IndexT col, IndexT level);

	protected:
		typedef Util::MipmapArray<TerrainNode*> TerrainTree;

		TerrainTree m_TerrainTree;
	};

	//------------------------------------------------------------------------
	inline
		SizeT
		TerrainNodeTree::GetDepth() const
	{
		return m_TerrainTree.GetMipCount();
	}
	//------------------------------------------------------------------------
	inline 
		SizeT
		TerrainNodeTree::GetRowSize(int depth) const
	{
		if ( depth < m_TerrainTree.GetMipCount() )
		{
			return m_TerrainTree.RowSize(depth);
		}
		return 0;
	}
	//------------------------------------------------------------------------
	inline
		SizeT
		TerrainNodeTree::GetColSize(int depth) const
	{
		if ( depth < m_TerrainTree.GetMipCount() )
		{
			return m_TerrainTree.ColSize(depth);
		}
		return 0;
	}

}

#endif // __TerrainNodeTree_H__