#ifndef TFILE_H
#define TFILE_H
#include "tcommon.h"
#include <windows.h>

#include "tfilepath.h"

namespace TFileConsts
{
enum SeekMode {
	seekStart = 0,
	seekCur,
	seekEnd
};

enum eFlags {
	kRead = 0x00000001,
	kWrite = 0x00000002,
	kReadWrite = kRead | kWrite,

	kDenyNone = 0x00000000,
	kDenyRead = 0x00000010,
	kDenyWrite = 0x00000020,
	kDenyAll = kDenyRead | kDenyWrite,

	kOpenExisting = 0x00000100,
	kOpenAlways = 0x00000200,
	kCreateAlways = 0x00000300,
	kCreateNew = 0x00000400,
	kTruncateExisting = 0x00000500, // not particularly useful, really
	kCreationMask = 0x0000FF00,

	kSequential = 0x00010000,
	kRandomAccess = 0x00020000,
	kUnbuffered = 0x00040000, // much faster on Win32 thanks to the crappy cache, but possibly bad in Unix?
	kWriteThrough = 0x00080000,

	kAllFileFlags = 0xFFFFFFFF
};
};

typedef __int32 uint32;

class TFile
{
	HANDLE m_hFile;
	TINT64 m_FilePosition;

public:
	TFile() {}
	TFile(const TFilePath &fname, uint32 flags = TFileConsts::kRead | TFileConsts::kDenyWrite | TFileConsts::kOpenExisting);
	//TFile(const wchar_t *pwszFileName, uint32 flags = TFileConsts::kRead | TFileConsts::kDenyWrite | TFileConsts::kOpenExisting);
	//TFile(VDFileHandle h);
	~TFile();

	bool open(const TFilePath &fname, uint32 flags = TFileConsts::kRead | TFileConsts::kDenyWrite | TFileConsts::kOpenExisting); // false if failed due to not found or already exists
	//bool	open(const wchar_t *pwszFileName, uint32 flags = TFileConsts::kRead | TFileConsts::kDenyWrite | TFileConsts::kOpenExisting);	// false if failed due to not found or already exists
	bool close();
	bool truncate();

	TINT64 size();
	TINT32 read(void *buffer, TINT32 length);
	TINT32 write(const void *buffer, TINT32 length);

	bool seek(TINT64 newPos, TFileConsts::SeekMode mode = TFileConsts::seekStart);
	bool skip(TINT64 delta);
	TINT64 tell();

	bool isOpen();
	string getLastError();

protected:
	bool open_internal(const TFilePath &fname, /* const wchar_t *pwszFilename, */ uint32 flags);

private:
	TFile(const TFile &);
	const TFile &operator=(const TFile &f);
	DWORD m_ec;
};

#endif