/*

Open Asset Import Library (assimp)

----------------------------------------------------------------------

Copyright (c) 2006-2025, assimp team

All rights reserved.

Redistribution and use of this software in source and binary forms,

with or without modification, are permitted provided that the

following conditions are met:

* Redistributions of source code must retain the above

  copyright notice, this list of conditions and the

  following disclaimer.

* Redistributions in binary form must reproduce the above

  copyright notice, this list of conditions and the

  following disclaimer in the documentation and/or other

  materials provided with the distribution.

* Neither the name of the assimp team, nor the names of its

  contributors may be used to endorse or promote products

  derived from this software without specific prior

  written permission of the assimp team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

----------------------------------------------------------------------

*/

#ifndef ASSIMP_BUILD_NO_Q3BSP_IMPORTER

#include "Q3BSPFileParser.h"

#include "Q3BSPFileData.h"

#include <vector>

#include <assimp/DefaultIOSystem.h>

#include <assimp/ZipArchiveIOSystem.h>

#include <assimp/ai_assert.h>

namespace Assimp {

using namespace Q3BSP;

// ------------------------------------------------------------------------------------------------

Q3BSPFileParser::Q3BSPFileParser( const std::string &mapName, ZipArchiveIOSystem *pZipArchive ) :

    m_sOffset( 0 ),

    m_Data(),

    m_pModel(nullptr),

    m_pZipArchive( pZipArchive )

{

    ai_assert(nullptr != m_pZipArchive );

    ai_assert( !mapName.empty() );

    if ( !readData( mapName ) )

        return;

    m_pModel = new Q3BSPModel;

    m_pModel->m_ModelName = mapName;

    if ( !parseFile() ) {

        delete m_pModel;

        m_pModel = nullptr;

    }

}

// ------------------------------------------------------------------------------------------------

Q3BSPFileParser::~Q3BSPFileParser() {

    delete m_pModel;

}

// ------------------------------------------------------------------------------------------------

Q3BSP::Q3BSPModel *Q3BSPFileParser::getModel() const {

    return m_pModel;

}

// ------------------------------------------------------------------------------------------------

bool Q3BSPFileParser::readData( const std::string &rMapName ) {

    if ( !m_pZipArchive->Exists( rMapName.c_str() ) )

        return false;

    IOStream *pMapFile = m_pZipArchive->Open( rMapName.c_str() );

    if ( nullptr == pMapFile )

        return false;

    const size_t size = pMapFile->FileSize();

    m_Data.resize( size );

    const size_t readSize = pMapFile->Read( &m_Data[0], sizeof( char ), size );

    if ( readSize != size ) {

        m_Data.clear();

        m_pZipArchive->Close(pMapFile);

        return false;

    }

    m_pZipArchive->Close( pMapFile );

    return true;

}

// ------------------------------------------------------------------------------------------------

bool Q3BSPFileParser::parseFile() {

    if ( m_Data.empty() ) {

        return false;

    }

    if ( !validateFormat() )

    {

        return false;

    }

    // Imports the dictionary of the level

    getLumps();

    // Count data and prepare model data

    countLumps();

    // Read in Vertices

    getVertices();

    // Read in Indices

    getIndices();

    // Read Faces

    getFaces();

    // Read Textures

    getTextures();

    // Read Lightmaps

    getLightMaps();

    // Load the entities

    getEntities();

    return true;

}

// ------------------------------------------------------------------------------------------------

bool Q3BSPFileParser::validateFormat()

{

    sQ3BSPHeader *pHeader = (sQ3BSPHeader*) &m_Data[ 0 ];

    m_sOffset += sizeof( sQ3BSPHeader );

    // Version and identify string validation

    if (pHeader->strID[ 0 ] != 'I' || pHeader->strID[ 1 ] != 'B' || pHeader->strID[ 2 ] != 'S'

        || pHeader->strID[ 3 ] != 'P')

    {

        return false;

    }

    return true;

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getLumps()

{

    size_t Offset = m_sOffset;

    m_pModel->m_Lumps.resize( kMaxLumps );

    for ( size_t idx=0; idx < kMaxLumps; idx++ )

    {

        sQ3BSPLump *pLump = new sQ3BSPLump;

        memcpy( pLump, &m_Data[ Offset ], sizeof( sQ3BSPLump ) );

        Offset += sizeof( sQ3BSPLump );

        m_pModel->m_Lumps[ idx ] = pLump;

    }

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::countLumps()

{

    m_pModel->m_Vertices.resize( m_pModel->m_Lumps[ kVertices ]->iSize / sizeof( sQ3BSPVertex ) );

    m_pModel->m_Indices.resize( m_pModel->m_Lumps[ kMeshVerts ]->iSize  / sizeof( int ) );

    m_pModel->m_Faces.resize( m_pModel->m_Lumps[ kFaces ]->iSize / sizeof( sQ3BSPFace ) );

    m_pModel->m_Textures.resize( m_pModel->m_Lumps[ kTextures ]->iSize / sizeof( sQ3BSPTexture ) );

    m_pModel->m_Lightmaps.resize( m_pModel->m_Lumps[ kLightmaps ]->iSize / sizeof( sQ3BSPLightmap ) );

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getVertices()

{

    size_t Offset = m_pModel->m_Lumps[ kVertices ]->iOffset;

    for ( size_t idx = 0; idx < m_pModel->m_Vertices.size(); idx++ )

    {

        sQ3BSPVertex *pVertex = new sQ3BSPVertex;

        memcpy( pVertex, &m_Data[ Offset ], sizeof( sQ3BSPVertex ) );

        Offset += sizeof( sQ3BSPVertex );

        m_pModel->m_Vertices[ idx ] = pVertex;

    }

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getIndices()

{

    ai_assert(nullptr != m_pModel );

    sQ3BSPLump *lump = m_pModel->m_Lumps[ kMeshVerts ];

    size_t Offset = (size_t) lump->iOffset;

    const size_t nIndices = lump->iSize / sizeof( int );

    m_pModel->m_Indices.resize( nIndices );

    memcpy( &m_pModel->m_Indices[ 0 ], &m_Data[ Offset ], lump->iSize );

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getFaces()

{

    ai_assert(nullptr != m_pModel );

    size_t Offset = m_pModel->m_Lumps[ kFaces ]->iOffset;

    for ( size_t idx = 0; idx < m_pModel->m_Faces.size(); idx++ )

    {

        sQ3BSPFace *pFace = new sQ3BSPFace;

        memcpy( pFace, &m_Data[ Offset ], sizeof( sQ3BSPFace ) );

        m_pModel->m_Faces[ idx ] = pFace;

        Offset += sizeof( sQ3BSPFace );

    }

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getTextures()

{

    ai_assert(nullptr != m_pModel );

    size_t Offset = m_pModel->m_Lumps[ kTextures ]->iOffset;

    for ( size_t idx=0; idx < m_pModel->m_Textures.size(); idx++ )

    {

        sQ3BSPTexture *pTexture = new sQ3BSPTexture;

        memcpy( pTexture, &m_Data[ Offset ], sizeof(sQ3BSPTexture) );

        m_pModel->m_Textures[ idx ] = pTexture;

        Offset += sizeof(sQ3BSPTexture);

    }

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getLightMaps()

{

    ai_assert(nullptr != m_pModel );

    size_t Offset = m_pModel->m_Lumps[kLightmaps]->iOffset;

    for ( size_t idx=0; idx < m_pModel->m_Lightmaps.size(); idx++ )

    {

        sQ3BSPLightmap *pLightmap = new sQ3BSPLightmap;

        memcpy( pLightmap, &m_Data[ Offset ], sizeof( sQ3BSPLightmap ) );

        Offset += sizeof( sQ3BSPLightmap );

        m_pModel->m_Lightmaps[ idx ] = pLightmap;

    }

}

// ------------------------------------------------------------------------------------------------

void Q3BSPFileParser::getEntities() {

    const int size = m_pModel->m_Lumps[ kEntities ]->iSize;

    m_pModel->m_EntityData.resize( size );

    if ( size > 0 ) {

        size_t Offset = m_pModel->m_Lumps[ kEntities ]->iOffset;

        memcpy( &m_pModel->m_EntityData[ 0 ], &m_Data[ Offset ], sizeof( char ) * size );

    }

}

// ------------------------------------------------------------------------------------------------

} // Namespace Assimp

#endif // ASSIMP_BUILD_NO_Q3BSP_IMPORTER