#ifndef AASPI_FILE_INFO_H
#define AASPI_FILE_INFO_H

//! \file
//! \brief Provides System Independent Information about files

#include <string>
#include <sys/stat.h>
#include <errno.h>
#include "aaspi_types.h"

#ifdef _WIN32
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#define AASPI_WRITABLE 0x02
#define AASPI_READABLE 0x04
	typedef struct __stat64  aaspi_stat;
#else
#include <unistd.h>
#define AASPI_WRITABLE W_OK
#define AASPI_READABLE R_OK
	typedef struct stat  aaspi_stat;
#endif

using namespace std;

//! \brief Provides System independent information about files
//!
//! Also provides several static query functions
class AASPI_FileInfo
{
public:
	//! \brief File Information associated with path
	//!
	AASPI_FileInfo(const string &path);
	~AASPI_FileInfo() {}

	//! \brief Check if file exists
	//!
	bool exists() { return dep_exists(err); }
	//! \brief Check if file is a directory
	//!
	bool isADirectory();
	//! \brief Check if file is a regular file
	//!
	bool isAFile();
	//! \brief Check if file is readable by this process
	//!
	inline bool isReadable() { return readable; }
	//! \brief Check if file is writable by this process
	//!
	inline bool isWritable() { return writable; }
	//! \brief Return file size in bytes
	//!
	//! \returns Returns zero on failure
	aaspi_int64 size();

	// Static functions
	
	//! \brief Check if file exists
	//!
	static bool exists(const string &path);
	//! \brief Check if file is a directory
	//!
	static bool isADirectory(const string &path);
	//! \brief Check if file is a regular file
	//!
	static bool isAFile(const string &path);
	//! \brief Check if file is writable by this process
	//!
	static bool isReadable(const string &path);
	//! \brief Check if file is writable by this process
	//!
	static bool isWritable(const string &path);
	//! \brief Return file size in bytes
	//!
	//! \returns Returns zero on failure
	static aaspi_int64 size(const string &path);
	//! \brief Get an acceptable name for a temporary file
	//!
	static string get_temp_file(const string &basepath="./",
	                            const string &basename="temp_",
	                            const string &suffix="");

protected:
	static int Stat(const string &path, aaspi_stat *stat_struct);
	static int Access(const string &path, int mode);
	static bool dep_exists(int eno);

	string cur_path;
	aaspi_stat cur_stat;
	int err;
	bool readable, writable;
};




#ifdef _WIN32
//---------------------------------------------------------------------------
// Windows definitions
//---------------------------------------------------------------------------

inline int AASPI_FileInfo::Stat(const string &path, aaspi_stat *stat_struct)
{
	int rv=0;
	rv= _stat64(path.c_str(),stat_struct);
	if (rv != 0) rv=errno;
	return rv;
}

inline int AASPI_FileInfo::Access(const string &path, int mode)
{
	return _access(path.c_str(),mode);
}

inline bool AASPI_FileInfo::dep_exists(int eno)
{
	return !(eno == ENOENT);
}



#else
//---------------------------------------------------------------------------
// Linux definitions
//---------------------------------------------------------------------------

inline int AASPI_FileInfo::Stat(const string &path, aaspi_stat *stat_struct)
{
	int rv=0;
	rv=stat(path.c_str(),stat_struct);
	if (rv != 0) rv=errno;
	return rv;
}

inline int AASPI_FileInfo::Access(const string &path, int mode)
{
	return access(path.c_str(),mode);
}

inline bool AASPI_FileInfo::dep_exists(int eno)
{
	return !( (eno == ENOENT) || (eno == ENOTDIR) || (eno == ELOOP) );
}


#endif




#endif