/* This file is part of the KDE project
   Copyright (C) 2006 Jaroslaw Staniek <js@iidea.pl>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/

#include "kexiqueryparameters.h"

#include <kdebug.h>
#include <klocale.h>
#include <kinputdialog.h>
#include <knumvalidator.h>

#include <kexidb/queryschemaparameter.h>
#include <kexidb/utils.h>
#include "utils/kexidatetimeformatter.h"

//static
QValueList<QVariant> KexiQueryParameters::getParameters(QWidget *parent, 
	const KexiDB::Driver &driver, KexiDB::QuerySchema& querySchema, bool &ok)
{
	Q_UNUSED(driver);
	ok = false;
	const KexiDB::QuerySchemaParameterList params( querySchema.parameters() );
	QValueList<QVariant> values;
	const QString caption( i18n("Enter Query Parameter Value", "Enter Parameter Value") );
	foreach(KexiDB::QuerySchemaParameterListConstIterator, it, params) {
		switch ((*it).type) {
		case KexiDB::Field::Byte:
		case KexiDB::Field::ShortInteger:
		case KexiDB::Field::Integer:
		case KexiDB::Field::BigInteger: {
//! @todo problem for ranges in case of BigInteger - will disappear when we remove use of KInputDialog
			int minValue, maxValue;
//! @todo add support for unsigned parameter here
			KexiDB::getLimitsForType((*it).type, minValue, maxValue);
			const int result = KInputDialog::getInteger(
				caption, (*it).message, 0, minValue, maxValue, 1/*step*/, 10/*base*/, &ok, parent);
			if (!ok)
				return QValueList<QVariant>(); //cancelled
			values.append(result);
			break;
		}
		case KexiDB::Field::Boolean: {
			QStringList list;
			list << i18n("Boolean True - Yes", "Yes") << i18n("Boolean False - No", "No");
			const QString result = KInputDialog::getItem(
				caption, (*it).message, list, 0/*current*/, false /*!editable*/, &ok, parent);
			if (!ok || result.isEmpty())
				return QValueList<QVariant>(); //cancelled
			values.append( QVariant( result==list.first(), 1 ) );
			break;
		}
		case KexiDB::Field::Date: {
			KexiDateFormatter df;
			const QString result = KInputDialog::getText( 
				caption, (*it).message, QString::null, &ok, parent, 0/*name*/, 
//! @todo add validator
				0/*validator*/, df.inputMask() );
			if (!ok)
				return QValueList<QVariant>(); //cancelled
			values.append( df.stringToDate(result) );
			break;
		}
		case KexiDB::Field::DateTime: {
			KexiDateFormatter df;
			KexiTimeFormatter tf;
			const QString result = KInputDialog::getText( 
				caption, (*it).message, QString::null, &ok, parent, 0/*name*/, 
//! @todo add validator
				0/*validator*/, dateTimeInputMask(df, tf) );
			if (!ok)
				return QValueList<QVariant>(); //cancelled
			values.append( stringToDateTime(df, tf, result) );
			break;
		}
		case KexiDB::Field::Time: {
			KexiTimeFormatter tf;
			const QString result = KInputDialog::getText( 
				caption, (*it).message, QString::null, &ok, parent, 0/*name*/, 
//! @todo add validator
				0/*validator*/, tf.inputMask() );
			if (!ok)
				return QValueList<QVariant>(); //cancelled
			values.append( tf.stringToTime(result) );
			break;
		}
		case KexiDB::Field::Float:
		case KexiDB::Field::Double: {
			// KInputDialog::getDouble() does not work well, use getText and double validator
			KDoubleValidator validator(0);
			const QString textResult = KInputDialog::getText( caption, (*it).message, QString::null, &ok, 
				parent, 0, &validator);
			if (!ok || textResult.isEmpty())
				return QValueList<QVariant>(); //cancelled
//! @todo this value will be still rounded: consider storing them as a decimal type 
//! 			(e.g. using a special Q_LLONG+decimalplace class)
			const double result = textResult.toDouble(&ok); //this is also good for float (to avoid rounding)
			if (!ok)
				return QValueList<QVariant>();
			values.append( result );
			break;
		}
		case KexiDB::Field::Text:
		case KexiDB::Field::LongText: {
			const QString result = KInputDialog::getText( 
				caption, (*it).message, QString::null, &ok, parent);
			if (!ok)
				return QValueList<QVariant>(); //cancelled
			values.append( result );
			break;
		}
		case KexiDB::Field::BLOB: {
//! @todo BLOB input unsupported
			values.append( QByteArray() );
		}
		default:
			kexiwarn << "KexiQueryParameters::getParameters() unsupported type " << KexiDB::Field::typeName((*it).type)
			<< " for parameter \"" << (*it).message << "\" - aborting query execution!" << endl;
			return QValueList<QVariant>();
		}
	}
	ok = true;
	return values;
}