//========= Copyright Valve Corporation ============//
#pragma once

#include <string>
#include <stdint.h>

/** Returns the path (including filename) to the current executable */
std::string Path_GetExecutablePath();

/** Returns the path of the current working directory */
std::string Path_GetWorkingDirectory();

/** Sets the path of the current working directory. Returns true if this was successful. */
bool Path_SetWorkingDirectory(const std::string &sPath);

/** returns the path (including filename) of the current shared lib or DLL */
std::string Path_GetThisModulePath();

/** Returns the specified path without its filename.
* If slash is unspecified the native path separator of the current platform
* will be used. */
std::string Path_StripFilename(const std::string &sPath, char slash = 0);

/** returns just the filename from the provided full or relative path. */
std::string Path_StripDirectory(const std::string &sPath, char slash = 0);

/** returns just the filename with no extension of the provided filename. 
* If there is a path the path is left intact. */
std::string Path_StripExtension(const std::string &sPath);

/** returns just extension of the provided filename (if any). */
std::string Path_GetExtension(const std::string &sPath);

/** Returns true if the path is absolute */
bool Path_IsAbsolute(const std::string &sPath);

/** Makes an absolute path from a relative path and a base path */
std::string Path_MakeAbsolute(const std::string &sRelativePath, const std::string &sBasePath, char slash = 0);

/** Fixes the directory separators for the current platform.
* If slash is unspecified the native path separator of the current platform
* will be used. */
std::string Path_FixSlashes(const std::string &sPath, char slash = 0);

/** Returns the path separator for the current platform */
char Path_GetSlash();

/** Jams two paths together with the right kind of slash */
std::string Path_Join(const std::string &first, const std::string &second, char slash = 0);
std::string Path_Join(const std::string &first, const std::string &second, const std::string &third, char slash = 0);
std::string Path_Join(const std::string &first, const std::string &second, const std::string &third, const std::string &fourth, char slash = 0);
std::string Path_Join(
	const std::string &first,
	const std::string &second,
	const std::string &third,
	const std::string &fourth,
	const std::string &fifth,
	char slash = 0);

/** Removes redundant <dir>/.. elements in the path. Returns an empty path if the 
* specified path has a broken number of directories for its number of ..s.
* If slash is unspecified the native path separator of the current platform
* will be used. */
std::string Path_Compact(const std::string &sRawPath, char slash = 0);

//** Removed trailing slashes */
std::string Path_RemoveTrailingSlash(const std::string &sRawPath, char slash = 0);

/** returns true if the specified path exists and is a directory */
bool Path_IsDirectory(const std::string &sPath);

/** returns true if the specified path represents an app bundle */
bool Path_IsAppBundle(const std::string &sPath);

/** returns true if the the path exists */
bool Path_Exists(const std::string &sPath);

/** Helper functions to find parent directories or subdirectories of parent directories */
std::string Path_FindParentDirectoryRecursively(const std::string &strStartDirectory, const std::string &strDirectoryName);
std::string Path_FindParentSubDirectoryRecursively(const std::string &strStartDirectory, const std::string &strDirectoryName);

/** Path operations to read or write text/binary files */
unsigned char *Path_ReadBinaryFile(const std::string &strFilename, int *pSize);
uint32_t Path_ReadBinaryFile(const std::string &strFilename, unsigned char *pBuffer, uint32_t unSize);
bool Path_WriteBinaryFile(const std::string &strFilename, unsigned char *pData, unsigned nSize);
std::string Path_ReadTextFile(const std::string &strFilename);
bool Path_WriteStringToTextFile(const std::string &strFilename, const char *pchData);
bool Path_WriteStringToTextFileAtomic(const std::string &strFilename, const char *pchData);

/** Returns a file:// url for paths, or an http or https url if that's what was provided */
std::string Path_FilePathToUrl(const std::string &sRelativePath, const std::string &sBasePath);

/** Strips off file:// off a URL and returns the path. For other kinds of URLs an empty string is returned */
std::string Path_UrlToFilePath(const std::string &sFileUrl);

/** Returns the root of the directory the system wants us to store user documents in */
std::string GetUserDocumentsPath();

#ifndef MAX_UNICODE_PATH
#define MAX_UNICODE_PATH 32767
#endif

#ifndef MAX_UNICODE_PATH_IN_UTF8
#define MAX_UNICODE_PATH_IN_UTF8 (MAX_UNICODE_PATH * 4)
#endif

//-----------------------------------------------------------------------------
#if defined(WIN32)
#define DYNAMIC_LIB_EXT ".dll"
#ifdef _WIN64
#define PLATSUBDIR "win64"
#else
#define PLATSUBDIR "win32"
#endif
#elif defined(OSX)
#define DYNAMIC_LIB_EXT ".dylib"
#define PLATSUBDIR "osx32"
#elif defined(LINUX)
#define DYNAMIC_LIB_EXT ".so"
#if defined(LINUX32)
#define PLATSUBDIR "linux32"
#else
#define PLATSUBDIR "linux64"
#endif
#else
#warning "Unknown platform for PLATSUBDIR"
#define PLATSUBDIR "unknown_platform"
#endif