/*
 * Copyright (C) 2006 Ian Reinhard Geiser
 *
 * Authors:
 *	Ian Reinhard Geiser
 *
 * Source:
 *	http://code.google.com/p/qxmpp
 *
 * This file is a part of QXmpp library.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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.
 *
 */

#include "QXmppInvokable.h"

#include <QVariant>
#include <QMetaMethod>
#include <QStringList>

#include <qdebug.h>

QXmppInvokable::QXmppInvokable( QObject *parent )
	: QObject( parent )
{

}


QXmppInvokable::~QXmppInvokable()
{

}

QVariant QXmppInvokable::dispatch( const QByteArray & method, const QList< QVariant > & args )
{
	buildMethodHash();

	if( !m_methodHash.contains(method))
		return QVariant();

	int idx = m_methodHash[method];
	if( paramTypes( args) != metaObject()->method(idx).parameterTypes ())
		return QVariant();

	const char *typeName = metaObject()->method(idx).typeName();
	int resultType = QMetaType::type(typeName);
	void *result = QMetaType::construct(resultType, 0);

	QGenericReturnArgument ret( typeName, result );
	QList<QGenericArgument> genericArgs;
	QList<QVariant>::ConstIterator iter = args.begin();
	while( iter != args.end())
	{
		const void *data = iter->data();
		const char *name = iter->typeName();
		genericArgs << QGenericArgument(name,data);
		++iter;
	}

	if( QMetaObject::invokeMethod ( this, method.constData(), ret,
	                                genericArgs.value(0, QGenericArgument() ),
	                                genericArgs.value(1, QGenericArgument() ),
	                                genericArgs.value(2, QGenericArgument() ),
	                                genericArgs.value(3, QGenericArgument() ),
	                                genericArgs.value(4, QGenericArgument() ),
	                                genericArgs.value(5, QGenericArgument() ),
	                                genericArgs.value(6, QGenericArgument() ),
	                                genericArgs.value(7, QGenericArgument() ),
	                                genericArgs.value(8, QGenericArgument() ),
	                                genericArgs.value(9, QGenericArgument() )) )
	{
		QVariant returnValue( resultType, result);
		QMetaType::destroy(resultType, result);
		return returnValue;
	}
	else
	{
		qDebug("No such method '%s'", method.constData() );
		return QVariant();
	}
}

QList< QByteArray > QXmppInvokable::paramTypes( const QList< QVariant > & params )
{
	QList<QByteArray> types;
	foreach( QVariant variant, params)
		types << variant.typeName();
	return types;
}

void QXmppInvokable::buildMethodHash( )
{
	QWriteLocker locker(&m_lock);
	if( m_methodHash.size() > 0 )
		return;

	int methodCount = metaObject()->methodCount ();
	for( int idx = 0; idx < methodCount; ++idx)
	{
		QByteArray signature = metaObject()->method(idx).signature();
		m_methodHash[signature.left(signature.indexOf('('))] = idx;
// 		qDebug() << metaObject()->method(idx).parameterTypes();
	}
}

QStringList QXmppInvokable::interfaces( ) const
{
	QStringList results;
	int methodCount = metaObject()->methodCount ();
	for( int idx = 0; idx < methodCount; ++idx)
	{
		if( metaObject()->method(idx).methodType() == QMetaMethod::Slot )
		{
			QByteArray signature = metaObject()->method(idx).signature();
			results << signature.left(signature.indexOf('('));
		}
	}
	return results;
}