/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#if defined(WIN32)
#include <windows.h>
// winnt.h defines ARRAYSIZE, but we want our own one... - this is needed before including util.h
#undef ARRAYSIZE
#endif

#include "backends/platform/sdl/file.h"
#include "common/archive.h"

#ifdef UNIX
  #include "backends/saves/posix/posix-saves.h"
#else
  #include "backends/saves/default/default-saves.h"
#endif

/*
 * Include header files needed for the getFilesystemFactory() method.
 */
#if defined(__amigaos4__)
	#include "backends/fs/amigaos4/amigaos4-fs-factory.h"
#elif defined(UNIX)
	#include "backends/fs/posix/posix-fs-factory.h"
#elif defined(WIN32)
	#include "backends/fs/windows/windows-fs-factory.h"
#endif


#if defined(UNIX)
#ifdef MACOSX
#define DEFAULT_CONFIG_FILE "Library/Preferences/ScummVM Preferences"
#elif defined(SAMSUNGTV)
#define DEFAULT_CONFIG_FILE "/dtv/usb/sda1/.scummvmrc"
#else
#define DEFAULT_CONFIG_FILE ".scummvmrc"
#endif
#else
#define DEFAULT_CONFIG_FILE "scummvm.ini"
#endif

SdlSubSys_File::SdlSubSys_File()
	:
	_inited(false),
	_fsFactory(0),
	_savefile(0) {

	#if defined(__amigaos4__)
		_fsFactory = new AmigaOSFilesystemFactory();
	#elif defined(UNIX)
		_fsFactory = new POSIXFilesystemFactory();
	#elif defined(WIN32)
		_fsFactory = new WindowsFilesystemFactory();
	#elif defined(__SYMBIAN32__)
		// Do nothing since its handled by the Symbian SDL inheritance
	#else
		#error Unknown and unsupported FS backend
	#endif
}

SdlSubSys_File::~SdlSubSys_File() {
	if (_inited) {
		fileDone();
	}
}

void SdlSubSys_File::fileInit() {
	if (_inited) {
		return;
	}

	// Create the savefile manager, if none exists yet (we check for this to
	// allow subclasses to provide their own).
	if (_savefile == 0) {
	#ifdef UNIX
		_savefile = new POSIXSaveFileManager();
	#else
		_savefile = new DefaultSaveFileManager();
	#endif
	}

	_inited = true;
}

void SdlSubSys_File::fileDone() {
	// Event Manager requires save manager for storing
	// recorded events
	delete getEventManager();
	delete _savefile;

	_inited = false;
}

bool SdlSubSys_File::hasFeature(Feature f) {
	return false;
}

void SdlSubSys_File::setFeatureState(Feature f, bool enable) {
	
}

bool SdlSubSys_File::getFeatureState(Feature f) {
	return false;
}

Common::SaveFileManager *SdlSubSys_File::getSavefileManager() {
	assert(_savefile);
	return _savefile;
}

FilesystemFactory *SdlSubSys_File::getFilesystemFactory() {
	assert(_fsFactory);
	return _fsFactory;
}

void SdlSubSys_File::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {

#ifdef DATA_PATH
	// Add the global DATA_PATH to the directory search list
	// FIXME: We use depth = 4 for now, to match the old code. May want to change that
	Common::FSNode dataNode(DATA_PATH);
	if (dataNode.exists() && dataNode.isDirectory()) {
		s.add(DATA_PATH, new Common::FSDirectory(dataNode, 4), priority);
	}
#endif

#ifdef MACOSX
	// Get URL of the Resource directory of the .app bundle
	CFURLRef fileUrl = CFBundleCopyResourcesDirectoryURL(CFBundleGetMainBundle());
	if (fileUrl) {
		// Try to convert the URL to an absolute path
		UInt8 buf[MAXPATHLEN];
		if (CFURLGetFileSystemRepresentation(fileUrl, true, buf, sizeof(buf))) {
			// Success: Add it to the search path
			Common::String bundlePath((const char *)buf);
			s.add("__OSX_BUNDLE__", new Common::FSDirectory(bundlePath), priority);
		}
		CFRelease(fileUrl);
	}

#endif

}

static Common::String getDefaultConfigFileName() {
	char configFile[MAXPATHLEN];
#if defined (WIN32) && !defined(_WIN32_WCE) && !defined(__SYMBIAN32__)
	OSVERSIONINFO win32OsVersion;
	ZeroMemory(&win32OsVersion, sizeof(OSVERSIONINFO));
	win32OsVersion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	GetVersionEx(&win32OsVersion);
	// Check for non-9X version of Windows.
	if (win32OsVersion.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) {
		// Use the Application Data directory of the user profile.
		if (win32OsVersion.dwMajorVersion >= 5) {
			if (!GetEnvironmentVariable("APPDATA", configFile, sizeof(configFile)))
				error("Unable to access application data directory");
		} else {
			if (!GetEnvironmentVariable("USERPROFILE", configFile, sizeof(configFile)))
				error("Unable to access user profile directory");

			strcat(configFile, "\\Application Data");
			CreateDirectory(configFile, NULL);
		}

		strcat(configFile, "\\ScummVM");
		CreateDirectory(configFile, NULL);
		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);

		FILE *tmp = NULL;
		if ((tmp = fopen(configFile, "r")) == NULL) {
			// Check windows directory
			char oldConfigFile[MAXPATHLEN];
			GetWindowsDirectory(oldConfigFile, MAXPATHLEN);
			strcat(oldConfigFile, "\\" DEFAULT_CONFIG_FILE);
			if ((tmp = fopen(oldConfigFile, "r"))) {
				strcpy(configFile, oldConfigFile);

				fclose(tmp);
			}
		} else {
			fclose(tmp);
		}
	} else {
		// Check windows directory
		GetWindowsDirectory(configFile, MAXPATHLEN);
		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
	}
#elif defined(UNIX)
	// On UNIX type systems, by default we store the config file inside
	// to the HOME directory of the user.
	//
	// GP2X is Linux based but Home dir can be read only so do not use
	// it and put the config in the executable dir.
	//
	// On the iPhone, the home dir of the user when you launch the app
	// from the Springboard, is /. Which we don't want.
	const char *home = getenv("HOME");
	if (home != NULL && strlen(home) < MAXPATHLEN)
		snprintf(configFile, MAXPATHLEN, "%s/%s", home, DEFAULT_CONFIG_FILE);
	else
		strcpy(configFile, DEFAULT_CONFIG_FILE);
#else
	strcpy(configFile, DEFAULT_CONFIG_FILE);
#endif

	return configFile;
}

Common::SeekableReadStream *SdlSubSys_File::createConfigReadStream() {
	Common::FSNode file(getDefaultConfigFileName());
	return file.createReadStream();
}

Common::WriteStream *SdlSubSys_File::createConfigWriteStream() {
	Common::FSNode file(getDefaultConfigFileName());
	return file.createWriteStream();
}