/*
 * This file is part of the Continued-MaNGOS Project
 *
 * 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 ADT_H
#define ADT_H

#include "loadlib.h"

#define TILESIZE (533.33333f)
#define CHUNKSIZE ((TILESIZE) / 16.0f)
#define UNITSIZE (CHUNKSIZE / 8.0f)

enum LiquidType
{
    LIQUID_TYPE_MAGMA = 0,
    LIQUID_TYPE_OCEAN = 1,
    LIQUID_TYPE_SLIME = 2,
    LIQUID_TYPE_WATER = 3
};

//**************************************************************************************
// ADT file class
//**************************************************************************************
#define ADT_CELLS_PER_GRID    16
#define ADT_CELL_SIZE         8
#define ADT_GRID_SIZE         (ADT_CELLS_PER_GRID*ADT_CELL_SIZE)

//
// Adt file height map chunk
//
class adt_MCVT
{
        union
        {
            uint32 fcc;
            char   fcc_txt[4];
        };
        uint32 size;
    public:
        float height_map[(ADT_CELL_SIZE + 1) * (ADT_CELL_SIZE + 1) + ADT_CELL_SIZE* ADT_CELL_SIZE];

        bool  prepareLoadedData();
};

//
// Adt file liquid map chunk (old)
//
class adt_MCLQ
{
        union
        {
            uint32 fcc;
            char   fcc_txt[4];
        };
        uint32 size;
    public:
        float height1;
        float height2;
        struct liquid_data
        {
            uint32 light;
            float  height;
        } liquid[ADT_CELL_SIZE + 1][ADT_CELL_SIZE + 1];

        // 1<<0 - ochen
        // 1<<1 - lava/slime
        // 1<<2 - water
        // 1<<6 - all water
        // 1<<7 - dark water
        // == 0x0F - not show liquid
        uint8 flags[ADT_CELL_SIZE][ADT_CELL_SIZE];
        uint8 data[84];
        bool  prepareLoadedData();
};

//
// Adt file cell chunk
//
class adt_MCNK
{
        union
        {
            uint32 fcc;
            char   fcc_txt[4];
        };
        uint32 size;
    public:
        uint32 flags;
        uint32 ix;
        uint32 iy;
        uint32 nLayers;
        uint32 nDoodadRefs;
        uint32 offsMCVT;        // height map
        uint32 offsMCNR;        // Normal vectors for each vertex
        uint32 offsMCLY;        // Texture layer definitions
        uint32 offsMCRF;        // A list of indices into the parent file's MDDF chunk
        uint32 offsMCAL;        // Alpha maps for additional texture layers
        uint32 sizeMCAL;
        uint32 offsMCSH;        // Shadow map for static shadows on the terrain
        uint32 sizeMCSH;
        uint32 areaid;
        uint32 nMapObjRefs;
        uint16 holes;           // locations where models pierce the heightmap
        uint16 pad;
        uint16 s[2];
        uint32 data1;
        uint32 data2;
        uint32 data3;
        uint32 predTex;
        uint32 nEffectDoodad;
        uint32 offsMCSE;
        uint32 nSndEmitters;
        uint32 offsMCLQ;         // Liqid level (old)
        uint32 sizeMCLQ;         //
        float  zpos;
        float  xpos;
        float  ypos;
        uint32 offsMCCV;         // offsColorValues in WotLK
        uint32 props;
        uint32 effectId;

        bool   prepareLoadedData();
        adt_MCVT* getMCVT()
        {
            if (offsMCVT)
                return (adt_MCVT*)((uint8*)this + offsMCVT);
            return 0;
        }
        adt_MCLQ* getMCLQ()
        {
            if (offsMCLQ)
                return (adt_MCLQ*)((uint8*)this + offsMCLQ);
            return 0;
        }
};

//
// Adt file grid chunk
//
class adt_MCIN
{
        union
        {
            uint32 fcc;
            char   fcc_txt[4];
        };
        uint32 size;
    public:
        struct adt_CELLS
        {
            uint32 offsMCNK;
            uint32 size;
            uint32 flags;
            uint32 asyncId;
        } cells[ADT_CELLS_PER_GRID][ADT_CELLS_PER_GRID];

        bool   prepareLoadedData();
        // offset from begin file (used this-84)
        adt_MCNK* getMCNK(int x, int y)
        {
            if (cells[x][y].offsMCNK)
                return (adt_MCNK*)((uint8*)this + cells[x][y].offsMCNK - 84);
            return 0;
        }
};

#define ADT_LIQUID_HEADER_FULL_LIGHT   0x01
#define ADT_LIQUID_HEADER_NO_HIGHT     0x02

struct adt_liquid_header
{
    uint16 liquidType;             // Index from LiquidType.dbc
    uint16 formatFlags;
    float  heightLevel1;
    float  heightLevel2;
    uint8  xOffset;
    uint8  yOffset;
    uint8  width;
    uint8  height;
    uint32 offsData2a;
    uint32 offsData2b;
};

//
// Adt file liquid data chunk (new)
//
class adt_MH2O
{
    public:
        union
        {
            uint32 fcc;
            char   fcc_txt[4];
        };
        uint32 size;

        struct adt_LIQUID
        {
            uint32 offsData1;
            uint32 used;
            uint32 offsData2;
        } liquid[ADT_CELLS_PER_GRID][ADT_CELLS_PER_GRID];

        bool   prepareLoadedData();

        adt_liquid_header* getLiquidData(int x, int y)
        {
            if (liquid[x][y].used && liquid[x][y].offsData1)
                return (adt_liquid_header*)((uint8*)this + 8 + liquid[x][y].offsData1);
            return 0;
        }

        float* getLiquidHeightMap(adt_liquid_header* h)
        {
            if (h->formatFlags & ADT_LIQUID_HEADER_NO_HIGHT)
                return 0;
            if (h->offsData2b)
                return (float*)((uint8*)this + 8 + h->offsData2b);
            return 0;
        }

        uint8* getLiquidLightMap(adt_liquid_header* h)
        {
            if (h->formatFlags & ADT_LIQUID_HEADER_FULL_LIGHT)
                return 0;
            if (h->offsData2b)
            {
                if (h->formatFlags & ADT_LIQUID_HEADER_NO_HIGHT)
                    return (uint8*)((uint8*)this + 8 + h->offsData2b);
                return (uint8*)((uint8*)this + 8 + h->offsData2b + (h->width + 1) * (h->height + 1) * 4);
            }
            return 0;
        }

        uint32* getLiquidFullLightMap(adt_liquid_header* h)
        {
            if (!(h->formatFlags & ADT_LIQUID_HEADER_FULL_LIGHT))
                return 0;
            if (h->offsData2b)
            {
                if (h->formatFlags & ADT_LIQUID_HEADER_NO_HIGHT)
                    return (uint32*)((uint8*)this + 8 + h->offsData2b);
                return (uint32*)((uint8*)this + 8 + h->offsData2b + (h->width + 1) * (h->height + 1) * 4);
            }
            return 0;
        }

        uint64 getLiquidShowMap(adt_liquid_header* h)
        {
            if (h->offsData2a)
                return *((uint64*)((uint8*)this + 8 + h->offsData2a));
            else
                return 0xFFFFFFFFFFFFFFFFLL;
        }

};

//
// Adt file header chunk
//
class adt_MHDR
{
        union
        {
            uint32 fcc;
            char   fcc_txt[4];
        };
        uint32 size;

        uint32 pad;
        uint32 offsMCIN;           // MCIN
        uint32 offsTex;            // MTEX
        uint32 offsModels;         // MMDX
        uint32 offsModelsIds;      // MMID
        uint32 offsMapObejcts;     // MWMO
        uint32 offsMapObejctsIds;  // MWID
        uint32 offsDoodsDef;       // MDDF
        uint32 offsObjectsDef;     // MODF
        uint32 offsMFBO;           // MFBO
        uint32 offsMH2O;           // MH2O
        uint32 data1;
        uint32 data2;
        uint32 data3;
        uint32 data4;
        uint32 data5;
    public:
        bool prepareLoadedData();
        adt_MCIN* getMCIN() { return (adt_MCIN*)((uint8*)&pad + offsMCIN);}
        adt_MH2O* getMH2O() { return offsMH2O ? (adt_MH2O*)((uint8*)&pad + offsMH2O) : 0;}

};

class ADT_file : public FileLoader
{
    public:
        bool prepareLoadedData();
        ADT_file();
        ~ADT_file();
        void free();

        adt_MHDR* a_grid;
};

bool isHole(int holes, int i, int j);

#endif