//=============================================================================
//
//   File : kvi_kvs_treenode_specialcommandfor.cpp
//   Created on Fri 07 Nov 2003 11:48:11 by Szymon Stefanek
//
//   This file is part of the KVIrc IRC client distribution
//   Copyright (C) 2003 Szymon Stefanek <pragma at kvirc dot net>
//
//   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 opinion) 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. ,59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
//=============================================================================

#define __KVIRC__

#include "kvi_kvs_treenode_specialcommandfor.h"
#include "kvi_kvs_treenode_expression.h"
#include "kvi_kvs_treenode_instruction.h"
#include "kvi_kvs_runtimecontext.h"
#include "kvi_locale.h"

KviKvsTreeNodeSpecialCommandFor::KviKvsTreeNodeSpecialCommandFor(const QChar * pLocation,KviKvsTreeNodeInstruction * pInit,KviKvsTreeNodeExpression * pCond,KviKvsTreeNodeInstruction * pUpd,KviKvsTreeNodeInstruction * pLoop)
: KviKvsTreeNodeSpecialCommand(pLocation,"for")
{
	m_pInitialization = pInit;
	if(m_pInitialization)m_pInitialization->setParent(this);
	m_pCondition = pCond;
	if(m_pCondition)m_pCondition->setParent(this);
	m_pUpdate = pUpd;
	if(m_pUpdate)m_pUpdate->setParent(this);
	m_pLoop = pLoop;
	if(m_pLoop)m_pLoop->setParent(this);
}

KviKvsTreeNodeSpecialCommandFor::~KviKvsTreeNodeSpecialCommandFor()
{
	if(m_pInitialization)delete m_pInitialization;
	if(m_pCondition)delete m_pCondition;
	if(m_pUpdate)delete m_pUpdate;
	if(m_pLoop)delete m_pLoop;
}

void KviKvsTreeNodeSpecialCommandFor::contextDescription(QString &szBuffer)
{
	szBuffer = "Special Command \"for\"";
}

void KviKvsTreeNodeSpecialCommandFor::dump(const char * prefix)
{
	debug("%s SpecialCommandFor",prefix);
	QString tmp = prefix;
	tmp.append("  ");
	if(m_pInitialization)m_pInitialization->dump(tmp.utf8().data());
	if(m_pCondition)m_pCondition->dump(tmp.utf8().data());
	if(m_pUpdate)m_pUpdate->dump(tmp.utf8().data());
	if(m_pLoop)m_pLoop->dump(tmp.utf8().data());
}

bool KviKvsTreeNodeSpecialCommandFor::execute(KviKvsRunTimeContext * c)
{
	if(m_pInitialization)
	{
		if(!m_pInitialization->execute(c))
		{
			// break allowed also here
			if(c->error())return false;

			if(c->breakPending())
			{
				c->handleBreak();
				return true;
			}

			return false; // propagate false ret value
		}
	}

	for(;;)
	{
		if(m_pCondition)
		{
			KviKvsVariant v;
			if(!m_pCondition->evaluateReadOnly(c,&v))return false;
			if(!v.asBoolean())return true;
		}
	
		if(m_pLoop)
		{
			if(!m_pLoop->execute(c))
			{
				if(c->error())return false;

				if(c->breakPending())
				{
					c->handleBreak();
					return true;
				}

				return false; // propagate false ret value
			}
		}
		
		if(m_pUpdate)
		{
			if(!m_pUpdate->execute(c))
			{
				// break allowed also here
				if(c->error())return false;

				if(c->breakPending())
				{
					c->handleBreak();
					return true;
				}
				
				return false; // propagate false ret value
			}
		}
	}
	// not reached
	return false;
}
