/*
 * This file is part of the AzerothCore 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 Affero General Public License as published by the
 * Free Software Foundation; either version 3 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 Affero 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/>.
 */

#define _CRT_SECURE_NO_DEPRECATE

#include "loadlib.h"
#include "mpq_libmpq04.h"
#include <cstdio>

class MPQFile;

u_map_fcc MverMagic = { {'R', 'E', 'V', 'M'} };

FileLoader::FileLoader()
{
    data = nullptr;
    data_size = 0;
    version = nullptr;
}

FileLoader::~FileLoader()
{
    free();
}

bool FileLoader::loadFile(std::string const& fileName, bool log)
{
    free();
    MPQFile mf(fileName.c_str());
    if (mf.isEof())
    {
        if (log)
            printf("No such file %s\n", fileName.c_str());
        return false;
    }

    data_size = mf.getSize();

    data = new uint8 [data_size];
    mf.read(data, data_size);
    mf.close();
    if (prepareLoadedData())
        return true;

    printf("Error loading %s", fileName.c_str());
    mf.close();
    free();
    return false;
}

bool FileLoader::prepareLoadedData()
{
    // Check version
    version = (file_MVER*) data;
    if (version->fcc != MverMagic.fcc)
        return false;
    if (version->ver != FILE_FORMAT_VERSION)
        return false;
    return true;
}

void FileLoader::free()
{
    delete[] data;
    data = nullptr;
    data_size = 0;
    version = nullptr;
}