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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "signalbug.h"

#include <qcoreapplication.h>
#include <qstring.h>

#include <stdio.h>

static int Step = 0;
Sender RandomSender (0, 0);


void TRACE (int step, const char *name)
{
	for (int t = 0; t < step - 1; t++)
		fprintf (stderr, "\t");
	fprintf (stderr, "Step %d: %s\n", step, name);
	return;
}


Receiver::Receiver ()
	: QObject ()
{
}

void Receiver::received ()
{
	::Step++;
	const int stepCopy = ::Step;
	TRACE (stepCopy, "Receiver::received()");
	if (::Step != 2 && ::Step != 4)
		qFatal("%s: Incorrect Step: %d (should be 2 or 4)", Q_FUNC_INFO, ::Step);

	if (::Step == 2)
		s->fire ();

	fprintf (stderr, "Receiver<%s>::received() sender=%s\n",
		(const char *) objectName ().toAscii (), sender ()->metaObject()->className());

	TRACE (stepCopy, "ends Receiver::received()");
}


Disconnector::Disconnector ()
	: QObject ()
{
}

void Disconnector::received ()
{
	::Step++;
	const int stepCopy = ::Step;
	TRACE (stepCopy, "Disconnector::received()");
	if (::Step != 5 && ::Step != 6)
		qFatal("%s: Incorrect Step: %d (should be 5 or 6)", Q_FUNC_INFO, ::Step);

	fprintf (stderr, "Disconnector<%s>::received() sender=%s\n",
		(const char *) objectName ().toAscii (), sender ()->metaObject()->className());
	if (sender () == 0)
		fprintf (stderr, "WE SHOULD NOT BE RECEIVING THIS SIGNAL\n");

	if (::Step == 5)
	{
		disconnect (s, SIGNAL (fired ()), s->d, SLOT (received ()));

		connect (&RandomSender, SIGNAL (fired ()), s->d, SLOT (received ()));
	}

	TRACE (stepCopy, "ends Disconnector::received()");
}


Sender::Sender (Receiver *r, Disconnector *d)
	: QObject ()
{
	this->r = r; this->d = d;
	if (r)
		connect (this, SIGNAL (fired ()), r, SLOT (received ()));
	if (d)
		connect (this, SIGNAL (fired ()), d, SLOT (received ()));
};

void Sender::fire ()
{
	::Step++;
	const int stepCopy = ::Step;
	TRACE (stepCopy, "Sender::fire()");
	if (::Step != 1 && ::Step != 3)
		qFatal("%s: Incorrect Step: %d (should be 1 or 3)", Q_FUNC_INFO, ::Step);

	emit fired ();
	TRACE (stepCopy, "ends Sender::fire()");
}


int main (int argc, char *argv [])
{
	QCoreApplication app (argc, argv);

	Receiver r;
	Disconnector d;
	Sender s (&r, &d);

	r.s = &s;
	d.s = &s;


	::Step = 0;
	s.fire ();
	return 0;
}