/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef _IVMAPMANAGER_H
#define _IVMAPMANAGER_H

#include "Define.h"
#include "ModelIgnoreFlags.h"
#include "Optional.h"
#include <string>

//===========================================================

/**
This is the minimum interface to the VMapMamager.
*/

namespace VMAP
{
    enum class LoadResult : uint8
    {
        Success,
        FileNotFound,
        VersionMismatch,
        ReadFromFileFailed,
        DisabledInConfig
    };

    #define VMAP_INVALID_HEIGHT       -100000.0f            // for check
    #define VMAP_INVALID_HEIGHT_VALUE -200000.0f            // real assigned value in unknown height case

    struct AreaAndLiquidData
    {
        struct AreaInfo
        {
            AreaInfo(int32 _adtId, int32 _rootId, int32 _groupId, uint32 _flags) : adtId(_adtId), rootId(_rootId), groupId(_groupId), mogpFlags(_flags) { }
            int32 const adtId;
            int32 const rootId;
            int32 const groupId;
            uint32 const mogpFlags;
        };
        struct LiquidInfo
        {
            LiquidInfo(uint32 _type, float _level) : type(_type), level(_level) { }
            uint32 const type;
            float const level;
        };

        float floorZ = VMAP_INVALID_HEIGHT;
        Optional<AreaInfo> areaInfo;
        Optional<LiquidInfo> liquidInfo;
    };
    //===========================================================
    class TC_COMMON_API IVMapManager
    {
        private:
            bool iEnableLineOfSightCalc;
            bool iEnableHeightCalc;

        public:
            IVMapManager() : iEnableLineOfSightCalc(true), iEnableHeightCalc(true) { }

            virtual ~IVMapManager(void) { }

            virtual LoadResult loadMap(char const* pBasePath, unsigned int pMapId, int x, int y) = 0;

            virtual LoadResult existsMap(char const* pBasePath, unsigned int pMapId, int x, int y) = 0;

            virtual void unloadMap(unsigned int pMapId, int x, int y) = 0;
            virtual void unloadMap(unsigned int pMapId) = 0;

            virtual bool isInLineOfSight(unsigned int pMapId, float x1, float y1, float z1, float x2, float y2, float z2, ModelIgnoreFlags ignoreFlags) = 0;
            virtual float getHeight(unsigned int pMapId, float x, float y, float z, float maxSearchDist) = 0;
            /**
            test if we hit an object. return true if we hit one. rx, ry, rz will hold the hit position or the dest position, if no intersection was found
            return a position, that is pReduceDist closer to the origin
            */
            virtual bool getObjectHitPos(unsigned int pMapId, float x1, float y1, float z1, float x2, float y2, float z2, float& rx, float &ry, float& rz, float pModifyDist) = 0;
            /**
            send debug commands
            */
            virtual bool processCommand(char *pCommand)= 0;

            /**
            Enable/disable LOS calculation
            It is enabled by default. If it is enabled in mid game the maps have to loaded manualy
            */
            void setEnableLineOfSightCalc(bool pVal) { iEnableLineOfSightCalc = pVal; }
            /**
            Enable/disable model height calculation
            It is enabled by default. If it is enabled in mid game the maps have to loaded manualy
            */
            void setEnableHeightCalc(bool pVal) { iEnableHeightCalc = pVal; }

            bool isLineOfSightCalcEnabled() const { return(iEnableLineOfSightCalc); }
            bool isHeightCalcEnabled() const { return(iEnableHeightCalc); }
            bool isMapLoadingEnabled() const { return(iEnableLineOfSightCalc || iEnableHeightCalc  ); }

            virtual std::string getDirFileName(unsigned int pMapId, int x, int y) const =0;
            /**
            Query world model area info.
            \param z gets adjusted to the ground height for which this are info is valid
            */
            virtual bool getAreaInfo(uint32 mapId, float x, float y, float &z, uint32 &flags, int32 &adtId, int32 &rootId, int32 &groupId) const=0;
            virtual bool GetLiquidLevel(uint32 mapId, float x, float y, float z, uint8 reqLiquidType, float& level, float& floor, uint32& type, uint32& mogpFlags) const=0;
            // get both area + liquid data in a single vmap lookup
            virtual void getAreaAndLiquidData(unsigned int mapId, float x, float y, float z, uint8 reqLiquidType, AreaAndLiquidData& data) const=0;
    };

}
#endif