// Copyright (c) 2018-2019 HALX99
// Copyright (c) 2020 c4games.com
#pragma once

#include "platform/CCPlatformConfig.h"
#include <string>
#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32
#include <io.h>
#include <direct.h>
#else
#include <unistd.h>
#include <errno.h>
#endif
#include <fcntl.h>
#include <functional>

#include "platform/CCPlatformMacros.h"

#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
#include "platform/android/CCFileUtils-android.h"
#include <jni.h>
#include <android/asset_manager.h>
#include <android/asset_manager_jni.h>
#include "base/ZipUtils.h"
#endif

#if defined(_WIN32)
#define O_READ_FLAGS O_BINARY | O_RDONLY, S_IREAD
#define O_WRITE_FLAGS O_CREAT | O_RDWR | O_BINARY | O_TRUNC, S_IWRITE | S_IREAD
#define O_APPEND_FLAGS O_APPEND | O_CREAT | O_RDWR | O_BINARY, S_IWRITE | S_IREAD

#define O_OVERLAP_FLAGS O_CREAT | O_RDWR | O_BINARY, S_IWRITE | S_IREAD

#define posix_open ::_open
#define posix_close ::_close
#define posix_lseek ::_lseek
#define posix_read ::_read
#define posix_write ::_write
#define posix_fd2fh(fd) reinterpret_cast<HANDLE>(_get_osfhandle(fd))
#define posix_fsetsize(fd, size) ::_chsize(fd, size)
#else
#define O_READ_FLAGS O_RDONLY, S_IRUSR
#define O_WRITE_FLAGS O_CREAT | O_RDWR | O_TRUNC, S_IRWXU
#define O_APPEND_FLAGS O_APPEND | O_CREAT | O_RDWR, S_IRWXU

#define O_OVERLAP_FLAGS O_CREAT | O_RDWR, S_IRWXU

#define posix_open ::open
#define posix_close ::close
#define posix_lseek ::lseek
#define posix_read ::read
#define posix_write ::write
#define posix_fd2fh(fd) (fd)
#define posix_fsetsize(fd, size) ::ftruncate(fd, size), ::lseek(fd, 0, SEEK_SET)
#endif

NS_CC_BEGIN

struct UnzFileStream;
union PXFileHandle {
    int _fd = -1;
#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
    AAsset* _asset;
    ZipFileStream _zfs;
#endif
};

struct PXIoF;

class CC_DLL FileStream {
public:
    FileStream();
    ~FileStream();

    FileStream(FileStream&& rhs);
    FileStream& operator=(FileStream&& rhs);

    enum class Mode {
        READ,
        WRITE,
        APPEND,
    };

    bool open(const std::string& path, Mode mode);
    int close();

    int seek(long offset, int origin);
    int read(void* buf, unsigned int size);

    int write(const void* buf, unsigned int size);

    operator bool() const;

private:
    void zeroset();
    void assign(FileStream&& rhs);

    PXFileHandle _handle;
    const PXIoF* _iof;
};

NS_CC_END