/*

 * 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)

{

#if QT_VERSION >= 0x040300

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

                1,

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

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

#endif

  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..."));

  chooseMap->addItems(*mapList);

  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();

    emit mapChanged("+rnd+");

    return;

  }

  loadMap(index);

  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);

  QFile mapCfgFile(datadir->absolutePath() + "/Maps/" + chooseMap->currentText() + "/map.cfg");

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

    QTextStream input(&mapCfgFile);

    input >> theme;

    mapCfgFile.close();

  }

}

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)

{

	theme = Themes->at(currentRow);

	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 theme;

}

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)));

	}

}

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);

}