/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2008 Igor Ulyanov <iulyanov@gmail.com>

 *

 * 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; version 2 of the License

 *

 * 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

 */

#include <QPushButton>

#include <QBuffer>

#include <QUuid>

#include <QBitmap>

#include <QPainter>

#include <QLinearGradient>

#include <QColor>

#include <QTextStream>

#include <QApplication>

#include <QLabel>

#include <QListWidget>

#include <QVBoxLayout>

#include <QIcon>

#include "hwconsts.h"

#include "mapContainer.h"

#include "igbox.h"

HWMapContainer::HWMapContainer(QWidget * parent) :

	QWidget(parent),

	mainLayout(this),

	pMap(0)

{

	mainLayout.setContentsMargins(QApplication::style()->pixelMetric(QStyle::PM_LayoutLeftMargin),

		1,

		QApplication::style()->pixelMetric(QStyle::PM_LayoutRightMargin),

		QApplication::style()->pixelMetric(QStyle::PM_LayoutBottomMargin));

	imageButt = new QPushButton(this);

	imageButt->setObjectName("imageButt");

	imageButt->setFixedSize(256 + 6, 128 + 6);

	imageButt->setFlat(true);

	imageButt->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);//QSizePolicy::Minimum, QSizePolicy::Minimum);

	mainLayout.addWidget(imageButt, 0, 0, 1, 2);

	connect(imageButt, SIGNAL(clicked()), this, SLOT(setRandomSeed()));

	connect(imageButt, SIGNAL(clicked()), this, SLOT(setRandomTheme()));

	chooseMap = new QComboBox(this);

	chooseMap->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);

	chooseMap->addItem(QComboBox::tr("generated map..."));

	for (int i = 0; i < mapList->size(); ++i) {

		QString map = (*mapList)[i];

		QFile mapCfgFile(

				QString("%1/Maps/%2/map.cfg")

				.arg(datadir->absolutePath())

				.arg(map));

		if (mapCfgFile.open(QFile::ReadOnly)) {

			QString theme;

			QTextStream input(&mapCfgFile);

			input >> theme;

			chooseMap->addItem(map, theme);

			mapCfgFile.close();

		}

	}

	connect(chooseMap, SIGNAL(currentIndexChanged(int)), this, SLOT(mapChanged(int)));

	mainLayout.addWidget(chooseMap, 1, 1);

	QLabel * lblMap = new QLabel(tr("Map"), this);

	mainLayout.addWidget(lblMap, 1, 0);

	gbThemes = new IconedGroupBox(this);

	gbThemes->setTitleTextPadding(60);

	gbThemes->setTitle(tr("Themes"));

	//gbThemes->setStyleSheet("padding: 0px"); // doesn't work - stylesheet is set with icon

	mainLayout.addWidget(gbThemes, 0, 2, 2, 1);

	QVBoxLayout * gbTLayout = new QVBoxLayout(gbThemes);

	gbTLayout->setContentsMargins(0, 0, 0 ,0);

	gbTLayout->setSpacing(0);

	lwThemes = new QListWidget(this);

	lwThemes->setMinimumHeight(30);

	lwThemes->setFixedWidth(120);

	for (int i = 0; i < Themes->size(); ++i) {

		QListWidgetItem * lwi = new QListWidgetItem();

		lwi->setText(Themes->at(i));

		lwi->setTextAlignment(Qt::AlignHCenter);

		lwThemes->addItem(lwi);

	}

	connect(lwThemes, SIGNAL(currentRowChanged(int)), this, SLOT(themeSelected(int)));

	gbTLayout->addWidget(lwThemes);

	lwThemes->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Minimum);

	mainLayout.setSizeConstraint(QLayout::SetFixedSize);//SetMinimumSize

	setRandomSeed();

	setRandomTheme();

}

void HWMapContainer::setImage(const QImage newImage)

{

	QPixmap px(256, 128);

	QPixmap pxres(256, 128);

	QPainter p(&pxres);

	px.fill(Qt::yellow);

	QBitmap bm = QBitmap::fromImage(newImage);

	px.setMask(bm);

	QLinearGradient linearGrad(QPoint(128, 0), QPoint(128, 128));

	linearGrad.setColorAt(1, QColor(0, 0, 192));

	linearGrad.setColorAt(0, QColor(66, 115, 225));

	p.fillRect(QRect(0, 0, 256, 128), linearGrad);

	p.drawPixmap(QPoint(0, 0), px);

	imageButt->setIcon(pxres);

	imageButt->setIconSize(QSize(256, 128));

	chooseMap->setCurrentIndex(0);

	pMap = 0;

}

void HWMapContainer::mapChanged(int index)

{

	if(!index) {

		changeImage();

		gbThemes->show();

		emit mapChanged("+rnd+");

		emit themeChanged(chooseMap->itemData(0).toString());

	} else

	{

		loadMap(index);

		gbThemes->hide();

		emit mapChanged(chooseMap->currentText());

	}

}

void HWMapContainer::loadMap(int index)

{

	QPixmap mapImage;

	if(!mapImage.load(datadir->absolutePath() + "/Maps/" + chooseMap->currentText() + "/preview.png")) {

		changeImage();

		chooseMap->setCurrentIndex(0);

		return;

	}

	imageButt->setIcon(mapImage);

}

void HWMapContainer::changeImage()

{

	pMap = new HWMap();

	connect(pMap, SIGNAL(ImageReceived(const QImage)), this, SLOT(setImage(const QImage)));

	pMap->getImage(m_seed.toStdString());

}

void HWMapContainer::themeSelected(int currentRow)

{

	QString theme = Themes->at(currentRow);

	chooseMap->setItemData(0, theme);

	gbThemes->setIcon(QIcon(QString("%1/Themes/%2/icon.png").arg(datadir->absolutePath()).arg(theme)));

	emit themeChanged(theme);

}

QString HWMapContainer::getCurrentSeed() const

{

  return m_seed;

}

QString HWMapContainer::getCurrentMap() const

{

  if(!chooseMap->currentIndex()) return QString();

  return chooseMap->currentText();

}

QString HWMapContainer::getCurrentTheme() const

{

	return chooseMap->itemData(chooseMap->currentIndex()).toString();

}

void HWMapContainer::resizeEvent ( QResizeEvent * event )

{

  //imageButt->setIconSize(imageButt->size());

}

void HWMapContainer::setSeed(const QString & seed)

{

	m_seed = seed;

	changeImage();

}

void HWMapContainer::setMap(const QString & map)

{

	if(map == "+rnd+")

	{

		changeImage();

		return;

	}

	int id = chooseMap->findText(map);

	if(id > 0) {

		chooseMap->setCurrentIndex(id);

		loadMap(id);

		if (pMap)

		{

			disconnect(pMap, 0, this, SLOT(setImage(const QImage)));

			pMap = 0;

		}

	}

}

void HWMapContainer::setTheme(const QString & theme)

{

	QList<QListWidgetItem *> items = lwThemes->findItems(theme, Qt::MatchExactly);

	if(items.size())

		lwThemes->setCurrentItem(items.at(0));

}

void HWMapContainer::setRandomSeed()

{

  m_seed = QUuid::createUuid().toString();

  emit seedChanged(m_seed);

  changeImage();

}

void HWMapContainer::setRandomTheme()

{

	if(!Themes->size()) return;

	quint32 themeNum = rand() % Themes->size();

	lwThemes->setCurrentRow(themeNum);

}