/*
-----------------------------------------------------------------------------
This source file is part of VideoTexture library

Copyright (c) 2006 The Zdeno Ash Miklas

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/


/** \file Exception.h
 *  \ingroup bgevideotex
 */
 
#ifndef __EXCEPTION_H__
#define __EXCEPTION_H__

#include <exception>
#include <vector>
#include <string>
#include <algorithm>

#include "Common.h"


#define CHCKHRSLTV(fnc,val,err) \
{ \
	HRESULT macroHRslt = (fnc); \
	if (macroHRslt != val) \
	throw Exception (err, macroHRslt, __FILE__, __LINE__); \
}

#define THRWEXCP(err,hRslt) throw Exception (err, hRslt, __FILE__, __LINE__);


#if defined WIN32

#define CHCKHRSLT(fnc,err) \
{ \
	HRESULT macroHRslt = (fnc); \
	if (FAILED(macroHRslt)) \
	throw Exception (err, macroHRslt, __FILE__, __LINE__); \
}

#else

#define CHCKHRSLT(fnc,err) CHCKHRSLTV(fnc,S_OK,err)

#endif


// forward declarations
class ExceptionID;
class Exception;


// exception identificators
extern ExceptionID ErrGeneral, ErrNotFound;


// result type
typedef long RESULT;


// class ExceptionID for exception identification
class ExceptionID
{
public:
	// constructor a destructor
	ExceptionID (void) {}
	~ExceptionID (void) {}

private:
	// not allowed 
	ExceptionID (const ExceptionID & obj) throw() {}
	ExceptionID & operator= (const ExceptionID & obj) throw() { return *this; }
};


// class ExpDesc for exception description
class ExpDesc
{
public:
	// constructor a destructor
	ExpDesc (ExceptionID & exp, const char * desc, RESULT hres = S_OK);
	~ExpDesc (void);

	// comparision function
	// returns 0, if exception identification don't match at all
	// returns 1, if only exception identification is matching
	// returns 2, if both exception identification and result are matching
	int isExp (ExceptionID * exp, RESULT hres = S_OK) throw()
	{
		// check exception identification
		if (&m_expID == exp)
		{
			// check result value
			if (m_hRslt == hres) return 2;
			// only identification match
			if (m_hRslt == S_OK) return 1;
		}
		// no match
		return 0;
	}

	// get exception description
	void loadDesc (std::string & desc) throw()
	{
		desc = m_description;
	}

	void registerDesc(void)
	{
		if (std::find(m_expDescs.begin(), m_expDescs.end(), this) == m_expDescs.end())
			m_expDescs.push_back(this);
	}
	// list of exception descriptions
	static std::vector<ExpDesc*> m_expDescs;

private:
	// exception ID
	ExceptionID & m_expID;
	// result
	RESULT m_hRslt;
	// description
	const char * m_description;

	// not allowed
	ExpDesc (const ExpDesc & obj) : m_expID (ErrNotFound) {}
	ExpDesc & operator= (const ExpDesc & obj) { return *this; }
};



// class Exception
class Exception : public std::exception  
{
public:
	// constructor
	Exception ();
	// destructor
	virtual ~Exception () throw();
	// copy constructor
	Exception (const Exception & xpt);
	// assignment operator
	Exception & operator= (const Exception & xpt);
	// get exception description
	virtual const char * what(void);

	// debug version of constructor
	Exception (ExceptionID & expID, RESULT rslt, const char * fil, int lin);
	// set source file and line of exception
	void setFileLine (const char * fil, int lin);

	// get description in string
	std::string & getDesc (void) throw() { return m_desc; }

	// report exception
	virtual void report (void);

	// get exception id
	ExceptionID * getID (void) throw() { return m_expID; }

	/// last exception description
	static std::string m_lastError;

	/// log file name
	static const char * m_logFile;

protected:
	// exception identification
	ExceptionID * m_expID;
	// RESULT code
	RESULT m_hRslt;

	// exception description
	std::string m_desc;

	// set exception description
	virtual void setXptDesc (void);

	// copy exception
	void copy (const Exception & xpt);

	// file name where exception was thrown
	std::string m_fileName;
	// line number in file
	int m_line;

};

extern ExpDesc MaterialNotAvailDesc;
extern ExpDesc ImageSizesNotMatchDesc;
extern ExpDesc ImageHasExportsDesc;
extern ExpDesc InvalidColorChannelDesc;
extern ExpDesc SceneInvalidDesc;
extern ExpDesc CameraInvalidDesc;
extern ExpDesc ObserverInvalidDesc;
extern ExpDesc MirrorInvalidDesc;
extern ExpDesc MirrorSizeInvalidDesc;
extern ExpDesc MirrorNormalInvalidDesc;
extern ExpDesc MirrorHorizontalDesc;
extern ExpDesc MirrorTooSmallDesc;
extern ExpDesc SourceVideoEmptyDesc;
extern ExpDesc SourceVideoCreationDesc;


void registerAllExceptions(void);
#endif