/*     Copyright 2015-2018 Egor Yusov
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
 *
 *  In no event and under no legal theory, whether in tort (including negligence), 
 *  contract, or otherwise, unless required by applicable law (such as deliberate 
 *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
 *  liable for any damages, including any direct, indirect, special, incidental, 
 *  or consequential damages of any character arising as a result of this License or 
 *  out of the use or inability to use the software (including but not limited to damages 
 *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
 *  all other commercial damages or losses), even if such Contributor has been advised 
 *  of the possibility of such damages.
 */

#pragma once

#include <memory>
#include <vector>
#include <fstream>
#include <android/asset_manager.h>

#include "../../Basic/interface/BasicFileSystem.h"
#include "../../../Primitives/interface/DataBlob.h"

class AndroidFile : public BasicFile
{
public:
    AndroidFile( const FileOpenAttribs &OpenAttribs );
    ~AndroidFile();

    void Read( Diligent::IDataBlob *pData );

    bool Read( void* Data, size_t BufferSize );

    bool Write( const void *Data, size_t BufferSize );

    size_t GetSize() { return m_Size; }

    size_t GetPos();

    void SetPos(size_t Offset, FilePosOrigin Origin);

    static bool Open(const char* FileName, std::ifstream& IFS, AAsset*& AssetFile, size_t& Size);

private:
    std::ifstream m_IFS;
    AAsset*       m_AssetFile = nullptr;
    size_t        m_Size      = 0;
};

struct AndroidFileSystem : public BasicFileSystem
{
public:
    static void Init(void* Activity, const char* ActivityClassName);

    static AndroidFile* OpenFile( const FileOpenAttribs &OpenAttribs );
    static inline Diligent::Char GetSlashSymbol(){ return '/'; }

    static bool FileExists( const Diligent::Char *strFilePath );
    static bool PathExists( const Diligent::Char *strPath );

    static bool CreateDirectory( const Diligent::Char *strPath );
    static void ClearDirectory( const Diligent::Char *strPath );
    static void DeleteFile( const Diligent::Char *strPath );
    static std::vector<std::unique_ptr<FindFileData>> Search(const Diligent::Char *SearchPattern);
};
