// TortoiseGitMerge - a Windows shell extension for easy version control

// Copyright (C) 2003-2006,2008,2010 - TortoiseSVN

// 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,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#pragma once

#include <memory>
#include "TGitPath.h"

/**
* \ingroup Utils
* This singleton class handles temporary files.
* All temp files are deleted at the end of a run of SVN operations
*/
class CTempFiles
{
public:
	static CTempFiles& Instance();

	/**
	 * Returns a path to a temporary file.
	 * \param bRemoveAtEnd if true, the temp file is removed when this object
	 *                     goes out of scope.
	 * \param path         if set, the temp file will have the same file extension
	 *                     as this path.
	 * \param revision     if set, the temp file name will include the revision number
	 */
	CTGitPath		GetTempFilePath(bool bRemoveAtEnd, const CTGitPath& path = CTGitPath());
	CString			GetTempFilePathString();

	/**
	 * Returns a path to a temporary directory.
	 * \param bRemoveAtEnd if true, the temp directory is removed when this object
	 *                     goes out of scope.
	 * \param path         if set, the temp directory will have the same file extension
	 *                     as this path.
	 * \param revision     if set, the temp directory name will include the revision number
	 */
	CTGitPath		GetTempDirPath(bool bRemoveAtEnd, const CTGitPath& path = CTGitPath());

	// Look for temporary files left around by TortoiseMerge and
	// remove them. But only delete 'old' files
	static void		DeleteOldTempFiles(LPCWSTR wildCard);

	void			AddFileToRemove(const CString& file) { m_TempFileList.AddPath(CTGitPath(file)); }

private:

	// try to allocate an unused temp file / dir at most MAX_RETRIES times

	enum {MAX_RETRIES = 100};

	// list of paths to delete when terminating the app

	CTGitPathList m_TempFileList;

	// actual implementation

	CTGitPath ConstructTempPath(const CTGitPath& path);
	CTGitPath CreateTempPath (bool bRemoveAtEnd, const CTGitPath& path, bool directory);

	// construction / destruction

	CTempFiles();
	~CTempFiles();
};
