/*
 * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _MAPTREE_H
#define _MAPTREE_H

#include "Platform/Define.h"
#include "Utilities/UnorderedMap.h"
#include "BIH.h"

namespace VMAP
{
    class ModelInstance;
    class GroupModel;
    class VMapManager2;

    struct LocationInfo
    {
        LocationInfo(): hitInstance(0), hitModel(0), ground_Z(-G3D::inf()) {};
        const ModelInstance *hitInstance;
        const GroupModel *hitModel;
        float ground_Z;
    };

    class StaticMapTree
    {
        typedef UNORDERED_MAP<uint32, bool> loadedTileMap;
        typedef UNORDERED_MAP<uint32, uint32> loadedSpawnMap;
        private:
            uint32 iMapID;
            bool iIsTiled;
            BIH iTree;
            ModelInstance *iTreeValues; // the tree entries
            uint32 iNTreeValues;

            // Store all the map tile idents that are loaded for that map
            // some maps are not splitted into tiles and we have to make sure, not removing the map before all tiles are removed
            // empty tiles have no tile file, hence map with bool instead of just a set (consistency check)
            loadedTileMap iLoadedTiles;
            // stores <tree_index, reference_count> to invalidate tree values, unload map, and to be able to report errors
            loadedSpawnMap iLoadedSpawns;
            std::string iBasePath;

        private:
            float getIntersectionTime(const G3D::Ray& pRay, float pMaxDist, bool pStopAtFirstHit) const;
            //bool containsLoadedMapTile(unsigned int pTileIdent) const { return(iLoadedMapTiles.containsKey(pTileIdent)); }
        public:
            static std::string getTileFileName(uint32 mapID, uint32 tileX, uint32 tileY);
            static uint32 packTileID(uint32 tileX, uint32 tileY) { return tileX<<16 | tileY; }
            static void unpackTileID(uint32 ID, uint32 &tileX, uint32 &tileY) { tileX = ID>>16; tileY = ID&0xFF; }
            static bool CanLoadMap(const std::string &basePath, uint32 mapID, uint32 tileX, uint32 tileY);

            StaticMapTree(uint32 mapID, const std::string &basePath);
            ~StaticMapTree();

            bool isInLineOfSight(const G3D::Vector3& pos1, const G3D::Vector3& pos2) const;
            bool getObjectHitPos(const G3D::Vector3& pos1, const G3D::Vector3& pos2, G3D::Vector3& pResultHitPos, float pModifyDist) const;
            float getHeight(const G3D::Vector3& pPos) const;
            bool getAreaInfo(G3D::Vector3 &pos, uint32 &flags, int32 &adtId, int32 &rootId, int32 &groupId) const;
            bool GetLocationInfo(const Vector3 &pos, LocationInfo &info) const;

            bool InitMap(const std::string &fname, VMapManager2 *vm);
            void UnloadMap(VMapManager2 *vm);
            bool LoadMapTile(uint32 tileX, uint32 tileY, VMapManager2 *vm);
            void UnloadMapTile(uint32 tileX, uint32 tileY, VMapManager2 *vm);
            bool isTiled() const { return iIsTiled; }
            uint32 numLoadedTiles() const { return iLoadedTiles.size(); }
    };

    struct AreaInfo
    {
        AreaInfo(): result(false), ground_Z(-G3D::inf()) {};
        bool result;
        float ground_Z;
        uint32 flags;
        int32 adtId;
        int32 rootId;
        int32 groupId;
    };
}                                                           // VMAP

#endif // _MAPTREE_H