/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#if defined(POSIX)

#define FORBIDDEN_SYMBOL_EXCEPTION_time_h
#define FORBIDDEN_SYMBOL_EXCEPTION_unistd_h
#define FORBIDDEN_SYMBOL_EXCEPTION_mkdir
#define FORBIDDEN_SYMBOL_EXCEPTION_exit		//Needed for IRIX's unistd.h
#define FORBIDDEN_SYMBOL_EXCEPTION_random
#define FORBIDDEN_SYMBOL_EXCEPTION_srandom

#include <unistd.h>

#include "backends/fs/chroot/chroot-fs-factory.h"
#include "backends/fs/chroot/chroot-fs.h"

ChRootFilesystemFactory::ChRootFilesystemFactory(const Common::String &root)
	: _root(root) {
}

AbstractFSNode *ChRootFilesystemFactory::makeRootFileNode() const {
	return new ChRootFilesystemNode(_root, "/");
}

AbstractFSNode *ChRootFilesystemFactory::makeCurrentDirectoryFileNode() const {
	char buf[MAXPATHLEN];
	if (getcwd(buf, MAXPATHLEN) == NULL) {
		return NULL;
	}

	Common::String curPath(buf);
	if (curPath.hasPrefix(_root + Common::String("/"))) {
		return new ChRootFilesystemNode(_root, buf + _root.size());
	}
	for (auto it = _virtualDrives.begin() ; it != _virtualDrives.end() ; ++it) {
		if (curPath.hasPrefix(it->_value + Common::String("/")))
			return new ChRootFilesystemNode(it->_value, buf + it->_value.size(), it->_key);
	}

	return new ChRootFilesystemNode(_root, "/");
}

AbstractFSNode *ChRootFilesystemFactory::makeFileNodePath(const Common::String &path) const {
	assert(!path.empty());
	size_t driveEnd = path.findFirstOf('/');
	if (driveEnd != Common::String::npos && driveEnd > 0) {
		auto it = _virtualDrives.find(path.substr(0, driveEnd));
		if (it != _virtualDrives.end())
			return new ChRootFilesystemNode(it->_value, path.substr(driveEnd), it->_key);
	}
	return new ChRootFilesystemNode(_root, path);
}

void ChRootFilesystemFactory::addVirtualDrive(const Common::String &name, const Common::String &path) {
	_virtualDrives[name] = path;
}

#endif