/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

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/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//																			//
//	plStatusLog Header														//
//																			//
//// Description /////////////////////////////////////////////////////////////
//																			//
//	plStatusLogs are our new encapsulated method of outputting text logs	//
//	for status (or other things, like, say, errors). They do more than just	//
//	output to the file, though; they maintain a scrolling buffer that		//
//	can be drawn on to the screen so you can actually view what's being		//
//	outputted to the log file (you can disable file writing if you wish).	//
//																			//
//////////////////////////////////////////////////////////////////////////////

#ifndef _plStatusLog_h
#define _plStatusLog_h

#include "hsTypes.h"
#include "hsThread.h"

#include <string>

class plPipeline;

//// plStatusLog Definition //////////////////////////////////////////////////
//	Currently, they all display in the same location, so only one should 
//	really be visible at any given time.

class plStatusLogMgr;
class hsMutex;
class plStatusLogDrawerStub;
class plStatusLog
{
	friend class plStatusLogMgr;
	friend class plStatusLogDrawerStub;
	friend class plStatusLogDrawer;
	
	protected:


		mutable UInt32		fFlags;		// Mutable so we can change it in IPrintLineToFile() internally
		UInt32	fOrigFlags;

		UInt32		fMaxNumLines;
		std::string fCFilename; // used ONLY by GetFileName()
		std::wstring fFilename;
		char		**fLines;
		UInt32		*fColors;
		hsMutex		fMutex;		// To make multithreaded-safe
		FILE*		fFileHandle;
		UInt32		fSize;
		bool		fEncryptMe;
		bool		fForceLog;

		plStatusLog	*fNext, **fBack;

		plStatusLog	**fDisplayPointer;		// Inside pfConsole
		
		void	IUnlink( void );
		void	ILink( plStatusLog **back );

		bool	IAddLine( const char *line, Int32 count, UInt32 color );
		bool	IPrintLineToFile( const char *line, UInt32 count );
		void	IParseFileName(wchar* file, wchar* fileNoExt, wchar** ext) const;

		void	IInit( void );
		void	IFini( void );
		bool	IReOpen( void );

		plStatusLog( UInt8 numDisplayLines, const wchar *filename, UInt32 flags );

	public:

		static UInt32 fLoggingOff;
		enum StatusFlagType
		{
			kFilledBackground	= 0x00000001,
			kAppendToLast		= 0x00000002,
			kDontWriteFile		= 0x00000004,
			kDeleteForMe		= 0x00000008,	// BE CAREFUL USING THIS!!
												// kDeleteForMe instructs the statusLogMgr to delete
												// this log itself when it destructs, which is at the
												// very end of client shutdown (the manager is static).
												// Because of this, it's safe to use this so long as you'll
												// never reference it at the very end of shutdown (as an
												// object is deleted by the resManager, for example, is
												// okay because that's done in plClient::Shutdown(), not 
												// at the very end of app destruction). If you use this
												// and your log is deleted before you, your pointer will
												// NOT reflect this; it's up to you 
			kAlignToTop			= 0x00000010,
			kDebugOutput		= 0x00000020,	// Also write string to debug console
			kTimestamp			= 0x00000040,	// Write a timestamp in Local time with each entry.
			kStdout				= 0x00000080,	// Also write string to stdout
			kTimeInSeconds		= 0x00000100,	// Write timestamp as seconds since epoch
			kTimeAsDouble		= 0x00000200,	// Write timestamp as seconds.millis
			kDontRotateLogs		= 0x00000400,	// Don't rename/renumber log fileName
			kServerTimestamp	= 0x00000800,	// Timestamp each entry with the server's time
			kRawTimeStamp		= 0x00001000,	// hsTimer::GetSeconds()
			kThreadID			= 0x00002000,	// ID of current thread
			kTimestampGMT		= 0x00004000,	// Write a timestamp in GMT with each entry.
			kNonFlushedLog		= 0x00008000,	// Do not flush the log after each write
		};

		enum 
		{
			kRed	= 0xffff0000,
			kGreen	= 0xff00ff00,
			kBlue	= 0xff0000ff,
			kYellow	= 0xffffff00,
			kWhite	= 0xffffffff
		};

		enum
		{
			kMaxFileSize	= 300000000,	// 300 megs
		};

		~plStatusLog();

		bool	AddLine( const char *line, UInt32 color = kWhite );

		/// printf-like functions

		bool	AddLineF( const char *format, ... );
		bool	AddLineF( UInt32 color, const char *format, ... );

		bool	AddLineV( const char *format, va_list arguments );
		bool	AddLineV( UInt32 color, const char *format, va_list arguments );

		/// Static functions that you give a filename to and it searches for a log based on that
		/// (or creates one if it isn't available)
		static bool AddLineS( const char *filename, const char *format, ... );
		static bool AddLineS( const char *filename, UInt32 color, const char *format, ... );

		void	Clear( void );

		// Clear and open a new file.
		void	Bounce( UInt32 flags=0 );

		const char* GetFileName() const {return fCFilename.c_str();}
		const wchar* GetFileNameW() const {return fFilename.c_str();}

		void SetForceLog(bool force) { fForceLog = force; }
};


//// Manager Class Definition ////////////////////////////////////////////////

class plStatusLogMgr
{
	friend class plStatusLog;

	private:

		plStatusLogMgr();
		static plStatusLogMgr	fManager;

	protected:

		plStatusLog		*fDisplays;
		plStatusLog		*fCurrDisplay;

		plStatusLogDrawerStub	*fDrawer;

		double fLastLogChangeTime;

		static wchar			fBasePath[];

		static const wchar	*IGetBasePath( void ) { return fBasePath; }

		void	IEnsurePathExists( const wchar *dirName );
		void	IPathAppend( wchar *base, const wchar *extra, unsigned maxLen );

		hsMutex		fMutex;		// To make multithreaded-safe

	public:

		enum
		{
			kDefaultNumLines	= 40
		};

		~plStatusLogMgr();

		static plStatusLogMgr	&GetInstance( void );

		void		Draw( void );

		plStatusLog	*CreateStatusLog( UInt8 numDisplayLines, const char *filename, UInt32 flags = plStatusLog::kFilledBackground );
		plStatusLog	*CreateStatusLog( UInt8 numDisplayLines, const wchar *filename, UInt32 flags = plStatusLog::kFilledBackground );
		void		ToggleStatusLog( plStatusLog *logToDisplay );
		void		NextStatusLog( void );
		void		PrevStatusLog( void );
		void		SetCurrStatusLog( const char *logName );
		void		SetCurrStatusLog( const wchar *logName );
		plStatusLog	*FindLog( const char *filename, hsBool createIfNotFound = true );
		plStatusLog	*FindLog( const wchar *filename, hsBool createIfNotFound = true );

		void		SetDrawer( plStatusLogDrawerStub *drawer ) { fDrawer = drawer; }
		void		SetBasePath( const char * path );
		void		SetBasePath( const wchar * path );

		void		BounceLogs();

		// Create a new folder and copy all log files into it (returns false on failure)
		bool		DumpLogs( const char *newFolderName );
		bool		DumpLogs( const wchar *newFolderName );
};

//// plStatusLogDrawerStub Class ////////////////////////////////////////////
//	Sometimes, we want to be able to link to plStatusLog without having the
//	pipeline-drawing functionality. So we do it this way: we define a single
//	class of type plStatusLogDrawerStub. If it's allocated and we're given a
//	pointer to it (by, say, the pipeline), then we use it to draw and all
//	is happy. If not, we don't draw.

class plStatusLogDrawerStub
{
	protected:

		UInt32		IGetMaxNumLines( plStatusLog *log ) const { return log->fMaxNumLines; }
		char		**IGetLines( plStatusLog *log ) const { return log->fLines; }
		const char	*IGetFilename( plStatusLog *log ) const { return log->GetFileName(); }
		const wchar	*IGetFilenameW( plStatusLog *log ) const { return log->GetFileNameW(); }
		UInt32		*IGetColors( plStatusLog *log ) const { return log->fColors; }
		UInt32		IGetFlags( plStatusLog *log ) const { return log->fFlags; }
		
	public:
		virtual ~plStatusLogDrawerStub() {}

		virtual void	Draw(plStatusLog* curLog, plStatusLog* firstLog) {}
};

#endif //_plStatusLog_h