/* This file is part of kiten, a KDE Japanese Reference Tool
   Copyright (C) 2006 Joseph Kerian <jkerian@gmail.com>

   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.
*/


/*
    Future Plans:
*	Design a custom QGridLayout to rearrange buttons dynamically to resize
*	Design multiple radical file handling
*	Icon set for displaying radicals outside of this bizarre unicode section
*	Radical decomposition implementation
*/

#include "radselectbuttongrid.h"
#include "radicalbutton.h"

#include <QtCore/QString>
#include <QtGui/QWidget>
#include <QtGui/QLabel>
#include <QtGui/QGridLayout>

#include <QtGui/QFontMetrics>
#include <QtCore/QSize>

#include <klocale.h>

#include <kdebug.h>

radselectButtonGrid::radselectButtonGrid(QWidget *parent, radicalFile *iradicalInfo)
    : QWidget(parent), m_currentMode(kSelection), m_radicalInfo(iradicalInfo)
{
    if (m_radicalInfo)
        buildRadicalButtons();
}

radselectButtonGrid::~radselectButtonGrid() {
}

void radselectButtonGrid::buildRadicalButtons()
{
	//Setup the grid
	QGridLayout *grid = new QGridLayout(this);

	//Now make labels
	for(unsigned int i=0;i<number_of_radical_columns;i++){
		QLabel *header = new QLabel(QString::number(i+1),this);
		header->setAlignment(Qt::AlignHCenter);
		grid->addWidget(header,0,i);
	}

	//Get a list of radicals (organized by strokes)
	QMultiMap<int, Radical> *radicalMap = m_radicalInfo->mapRadicalsByStrokes();
	QMultiMap<int, Radical>::const_iterator it = radicalMap->constBegin();
	//Now create all the buttons
	int last_column = 0;
	int row_index = 1;
	while( it != radicalMap->constEnd()) {
		//For each radical, figure out which slot it goes in (0-based column index)
		unsigned int column_index = it.key() - 1;
		if(column_index >= number_of_radical_columns)
			column_index = number_of_radical_columns-1;
		//If we're starting a new column, reset the row
		if(last_column != column_index)
			row_index = 1;

		//Make the button
		radicalButton *button = new radicalButton(*it, this);
		grid->addWidget(button, row_index++, column_index);
		//Bind slots/signals for this button
		connect(
			button, SIGNAL(userClicked(const QString&,radicalButton::ButtonStatus)),
			this, SLOT(radicalClicked(const QString&,radicalButton::ButtonStatus))
		);
		connect( this, SIGNAL(clearButtonSelections()),
				button, SLOT(resetButton()) );

		//Add this button to our list
		m_buttons.insert(*it,button);

		last_column = column_index;
		++it;
	}
	setLayout(grid);
}

void radselectButtonGrid::setFont(const QFont &font) {
	foreach(QPushButton *button, m_buttons) {
		button->setFont(font);
	}
}

void radselectButtonGrid::radicalClicked(const QString &newrad,
		radicalButton::ButtonStatus newStatus) {
	if(newStatus == radicalButton::kRelated)
		; //Do something fancy
	else if(newStatus == radicalButton::kNormal ||
			newStatus == radicalButton::kSelected) {
		m_currentMode = kSelection;
		if(newStatus == radicalButton::kNormal) {
			m_selectedRadicals.remove(newrad);
			if(m_selectedRadicals.isEmpty())
				emit signalChangeStatusbar (i18n("No Radicals Selected"));
		} else
			m_selectedRadicals.insert(newrad);

		updateButtons();
	}
}

void radselectButtonGrid::updateButtons() {
        if (!m_radicalInfo) {
            return;
        }
	//Special Case/Early exit: no radicals selected
	if(m_selectedRadicals.isEmpty()) {
		QList<Kanji> blankList;
		foreach(radicalButton *button, m_buttons)
			button->setStatus(radicalButton::kNormal);
		emit possibleKanji(blankList);
		return;
	}

	//Figure out what our kanji possibilites are
	QSet<Kanji> kanjiSet = m_radicalInfo->kanjiContainingRadicals(m_selectedRadicals);

	//Convert to a list, sort, and tell the world!
	QList<Kanji> kanjiList = kanjiSet.toList();
	qSort(kanjiList);
	emit possibleKanji(kanjiList);

	//Do the announcement of the selected radical list
	QStringList radicalList(m_selectedRadicals.toList());
	emit signalChangeStatusbar(i18n("Selected Radicals: ")+ radicalList.join(", "));

	//Now figure out what our remaining radical possibilities are
	QSet<QString> remainingRadicals = m_radicalInfo->radicalsInKanji(kanjiSet);
	//Remove the already selected ones
	remainingRadicals -= m_selectedRadicals;

	//Now go through and set status appropriately
	QHash<QString, radicalButton*>::iterator i = m_buttons.begin();
	while(i != m_buttons.end()) {
		if(m_selectedRadicals.contains(i.key()))
			i.value()->setStatus(radicalButton::kSelected);
		else if(remainingRadicals.contains(i.key()))
			i.value()->setStatus(radicalButton::kNormal);
		else
			i.value()->setStatus(radicalButton::kNotAppropriate);
		++i;
	}
}

void radselectButtonGrid::clearSelections() {
	m_selectedRadicals.clear();
	emit clearButtonSelections();
}

#include "radselectbuttongrid.moc"