/*

 * 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),

    mapgen(MAPGEN_REGULAR),

    maze_size(0)

{

    hhSmall.load(":/res/hh_small.png");

    hhLimit = 18;

    templateFilter = 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..."));

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

    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));

        QFile mapLuaFile(

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

                .arg(datadir->absolutePath())

                .arg(map));

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

            QString theme;

            quint32 limit = 0;

            QList<QVariant> mapInfo;

            QTextStream input(&mapCfgFile);

            input >> theme;

            input >> limit;

            mapInfo.push_back(map);

            mapInfo.push_back(theme);

            if (limit)

                mapInfo.push_back(limit);

            else

                mapInfo.push_back(18);

            mapInfo.push_back(mapLuaFile.exists());

            chooseMap->addItem(mapLuaFile.exists() ? (QComboBox::tr("Mission") + ": " + map) : map, mapInfo);

            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);

    lblFilter = new QLabel(tr("Filter"), this);

    mainLayout.addWidget(lblFilter, 2, 0);

    CB_TemplateFilter = new QComboBox(this);

    CB_TemplateFilter->addItem(tr("All"), 0);

    CB_TemplateFilter->addItem(tr("Small"), 1);

    CB_TemplateFilter->addItem(tr("Medium"), 2);

    CB_TemplateFilter->addItem(tr("Large"), 3);

    CB_TemplateFilter->addItem(tr("Cavern"), 4);

    CB_TemplateFilter->addItem(tr("Wacky"), 5);

    mainLayout.addWidget(CB_TemplateFilter, 2, 1);

    connect(CB_TemplateFilter, SIGNAL(currentIndexChanged(int)), this, SLOT(templateFilterChanged(int)));

    mainLayout.addWidget(maze_size_label, 2, 0);

    maze_size_label->hide();

    maze_size_selection = new QComboBox(this);

    maze_size_selection->setCurrentIndex(1);

    maze_size = 1;

    mainLayout.addWidget(maze_size_selection, 2, 1);

    maze_size_selection->hide();

    connect(maze_size_selection, SIGNAL(currentIndexChanged(int)), this, SLOT(setMaze_size(int)));

    gbThemes = new IconedGroupBox(this);

    gbThemes->setTitleTextPadding(60);

    gbThemes->setContentTopPadding(6);

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

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

    mainLayout.addWidget(gbThemes, 0, 2, 3, 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)));

    // override default style to tighten up theme scroller

    lwThemes->setStyleSheet(QString(

        "QListWidget{"

            "border: solid;"

            "border-width: 0px;"

            "border-radius: 0px;"

            "border-color: transparent;"

            "background-color: #0d0544;"

            "color: #ffcc00;"

            "font: bold 14px;"

            "}"

        )

    );

    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);

    addInfoToPreview(pxres);

    chooseMap->setCurrentIndex(mapgen);

    pMap = 0;

}

void HWMapContainer::setHHLimit(int newHHLimit)

{

    hhLimit = newHHLimit;

}

void HWMapContainer::mapChanged(int index)

{

    switch(index) {

    case MAPGEN_REGULAR:

        mapgen = MAPGEN_REGULAR;

        changeImage();

        gbThemes->show();

        lblFilter->show();

        CB_TemplateFilter->show();

        maze_size_label->hide();

        maze_size_selection->hide();

        emit mapChanged("+rnd+");

        emit mapgenChanged(mapgen);

        emit themeChanged(chooseMap->itemData(index).toList()[1].toString());

        break;

    case MAPGEN_MAZE:

        mapgen = MAPGEN_MAZE;

        changeImage();

        gbThemes->show();

        lblFilter->hide();

        CB_TemplateFilter->hide();

        maze_size_label->show();

        maze_size_selection->show();

        emit mapChanged("+maze+");

        emit mapgenChanged(mapgen);

        emit themeChanged(chooseMap->itemData(index).toList()[1].toString());

        break;

    default:

        loadMap(index);

        gbThemes->hide();

        lblFilter->hide();

        CB_TemplateFilter->hide();

        maze_size_label->hide();

        maze_size_selection->hide();

        emit mapChanged(chooseMap->itemData(index).toList()[0].toString());

    }

}

void HWMapContainer::loadMap(int index)

{

    QPixmap mapImage;

    if(!mapImage.load(datadir->absolutePath() + "/Maps/" + chooseMap->itemData(index).toList()[0].toString() + "/preview.png")) {

        changeImage();

        chooseMap->setCurrentIndex(0);

        return;

    }

    hhLimit = chooseMap->itemData(index).toList()[2].toInt();

    addInfoToPreview(mapImage);

}

// Should this add text to identify map size?

void HWMapContainer::addInfoToPreview(QPixmap image)

{

    QPixmap finalImage = QPixmap(image.size());

    finalImage.fill(QColor(0, 0, 0, 0));

    QPainter p(&finalImage);

    p.drawPixmap(image.rect(), image);

    //p.setPen(QColor(0xf4,0x9e,0xe9));

    p.setPen(QColor(0xff,0xcc,0x00));

    p.setBrush(QColor(0, 0, 0));

    p.drawRect(image.rect().width() - hhSmall.rect().width() - 28, 3, 40, 20);

    p.setFont(QFont("MS Shell Dlg", 10));

    p.drawText(image.rect().width() - hhSmall.rect().width() - 14 - (hhLimit > 9 ? 10 : 0), 18, QString::number(hhLimit));

    p.drawPixmap(image.rect().width() - hhSmall.rect().width() - 5, 5, hhSmall.rect().width(), hhSmall.rect().height(), hhSmall);

    imageButt->setIcon(finalImage);

    imageButt->setIconSize(image.size());

}

void HWMapContainer::changeImage()

{

    if (pMap)

    {

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

        disconnect(pMap, 0, this, SLOT(setHHLimit(int)));

        pMap = 0;

    }

    pMap = new HWMap();

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

    connect(pMap, SIGNAL(HHLimitReceived(int)), this, SLOT(setHHLimit(int)));

    pMap->getImage(m_seed.toStdString(), getTemplateFilter(), mapgen, maze_size);

}

void HWMapContainer::themeSelected(int currentRow)

{

    QString theme = Themes->at(currentRow);

    QList<QVariant> mapInfoRegular;

    mapInfoRegular.push_back(QString("+rnd+"));

    mapInfoRegular.push_back(theme);

    mapInfoRegular.push_back(18);

    mapInfoRegular.push_back(false);

    chooseMap->setItemData(0, mapInfoRegular);

    QList<QVariant> mapInfoMaze;

    mapInfoMaze.push_back(QString("+maze+"));

    mapInfoMaze.push_back(theme);

    mapInfoMaze.push_back(18);

    mapInfoMaze.push_back(false);

    chooseMap->setItemData(1, mapInfoMaze);

    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() <= 1) return QString();

    return chooseMap->itemData(chooseMap->currentIndex()).toList()[0].toString();

}

QString HWMapContainer::getCurrentTheme() const

{

    return chooseMap->itemData(chooseMap->currentIndex()).toList()[1].toString();

}

bool HWMapContainer::getCurrentIsMission() const

{

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

    return chooseMap->itemData(chooseMap->currentIndex()).toList()[3].toBool();

}

int HWMapContainer::getCurrentHHLimit() const

{

    return hhLimit;

}

quint32 HWMapContainer::getTemplateFilter() const

{

    return CB_TemplateFilter->itemData(CB_TemplateFilter->currentIndex()).toInt();

}

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+" || map == "+maze+")

    {

        changeImage();

        return;

    }

    int id = 0;

    for(int i = 0; i < chooseMap->count(); i++)

        if(chooseMap->itemData(i).toList()[0].toString() == map)

        {

            id = i;

            break;

        }

    if(id > 0) {

        if (pMap)

        {

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

            disconnect(pMap, 0, this, SLOT(setHHLimit(int)));

            pMap = 0;

        }

        chooseMap->setCurrentIndex(id);

        loadMap(id);

    }

}

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);

}

void HWMapContainer::setTemplateFilter(int filter)

{

    CB_TemplateFilter->setCurrentIndex(filter);

}

void HWMapContainer::templateFilterChanged(int filter)

{

    emit newTemplateFilter(filter);

    changeImage();

}

MapGenerator HWMapContainer::get_mapgen(void) const

{

    return mapgen;

}

int HWMapContainer::get_maze_size(void) const

{

    return maze_size;

}

void HWMapContainer::setMaze_size(int size)

{

    maze_size = size;

    maze_size_selection->setCurrentIndex(size);

    emit maze_sizeChanged(size);

    changeImage();

}

void HWMapContainer::setMapgen(MapGenerator m)

{

    mapgen = m;

    emit mapgenChanged(m);

    changeImage();

}