/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2012 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 <QLabel>

#include <QListView>

#include <QVBoxLayout>

#include <QIcon>

#include <QLineEdit>

#include <QMessageBox>

#include <QStringListModel>

#include "hwconsts.h"

#include "mapContainer.h"

#include "igbox.h"

#include "HWApplication.h"

#include "ThemeModel.h"

HWMapContainer::HWMapContainer(QWidget * parent) :

    QWidget(parent),

    mainLayout(this),

    pMap(0),

    mapgen(MAPGEN_REGULAR),

    m_previewSize(256, 128)

{

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

    hhLimit = 18;

    templateFilter = 0;

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

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

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

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

                                  1,

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

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

    QWidget* mapWidget = new QWidget(this);

    mainLayout.addWidget(mapWidget, 0, 0, Qt::AlignHCenter);

    QGridLayout* mapLayout = new QGridLayout(mapWidget);

    mapLayout->setMargin(0);

    imageButt = new QPushButton(mapWidget);

    imageButt->setObjectName("imageButt");

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

    imageButt->setFlat(true);

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

    mapLayout->addWidget(imageButt, 0, 0, 1, 2);

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

    chooseMap = new QComboBox(mapWidget);

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

    m_mapModel = DataManager::instance().mapModel();

    chooseMap->setEditable(false);

    chooseMap->setModel(m_mapModel);

    mapLayout->addWidget(chooseMap, 1, 1);

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

    mapLayout->addWidget(lblMap, 1, 0);

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

    mapLayout->addWidget(lblFilter, 2, 0);

    cbTemplateFilter = new QComboBox(mapWidget);

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

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

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

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

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

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

    mapLayout->addWidget(cbTemplateFilter, 2, 1);

    connect(cbTemplateFilter, SIGNAL(activated(int)), this, SLOT(setTemplateFilter(int)));

    maze_size_label = new QLabel(tr("Type"), mapWidget);

    mapLayout->addWidget(maze_size_label, 2, 0);

    maze_size_label->hide();

    cbMazeSize = new QComboBox(mapWidget);

    cbMazeSize->addItem(tr("Small tunnels"), 0);

    cbMazeSize->addItem(tr("Medium tunnels"), 1);

    cbMazeSize->addItem(tr("Large tunnels"), 2);

    cbMazeSize->addItem(tr("Small floating islands"), 3);

    cbMazeSize->addItem(tr("Medium floating islands"), 4);

    cbMazeSize->addItem(tr("Large floating islands"), 5);

    cbMazeSize->setCurrentIndex(1);

    mapLayout->addWidget(cbMazeSize, 2, 1);

    cbMazeSize->hide();

    connect(cbMazeSize, SIGNAL(activated(int)), this, SLOT(setMazeSize(int)));

    gbThemes = new IconedGroupBox(mapWidget);

    gbThemes->setTitleTextPadding(80);

    gbThemes->setContentTopPadding(15);

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

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

    mapLayout->addWidget(gbThemes, 0, 2, 3, 1);

    // disallow row to be collapsed (so it can't get ignored when Qt applies rowSpan of gbThemes)

    mapLayout->setRowMinimumHeight(2, 13);

    QVBoxLayout * gbTLayout = new QVBoxLayout(gbThemes);

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

    gbTLayout->setSpacing(0);

    lvThemes = new QListView(mapWidget);

    lvThemes->setMinimumHeight(30);

    lvThemes->setFixedWidth(140);

    m_themeModel = DataManager::instance().themeModel();

    lvThemes->setModel(m_themeModel);

    lvThemes->setIconSize(QSize(16, 16));

    lvThemes->setEditTriggers(QListView::NoEditTriggers);

    connect(lvThemes->selectionModel(), SIGNAL(currentRowChanged( const QModelIndex &, const QModelIndex &)), this, SLOT(themeSelected( const QModelIndex &, const QModelIndex &)));

    // override default style to tighten up theme scroller

    lvThemes->setStyleSheet(QString(

                                "QListView{"

                                "border: solid;"

                                "border-width: 0px;"

                                "border-radius: 0px;"

                                "border-color: transparent;"

                                "background-color: #0d0544;"

                                "color: #ffcc00;"

                                "font: bold 13px;"

                                "}"

                            )

                           );

    gbTLayout->addWidget(lvThemes);

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

    mapLayout->setSizeConstraint(QLayout::SetFixedSize);

    QWidget* seedWidget = new QWidget(this);

    mainLayout.addWidget(seedWidget, 1, 0);

    QGridLayout* seedLayout = new QGridLayout(seedWidget);

    seedLayout->setMargin(0);

    seedLabel = new QLabel(tr("Seed"), seedWidget);

    seedLayout->addWidget(seedLabel, 3, 0);

    seedEdit = new QLineEdit(seedWidget);

    seedEdit->setMaxLength(54);

    connect(seedEdit, SIGNAL(returnPressed()), this, SLOT(seedEdited()));

    seedLayout->addWidget(seedEdit, 3, 1);

    seedLayout->setColumnStretch(1, 5);

    seedSet = new QPushButton(seedWidget);

    seedSet->setText(QPushButton::tr("more"));

    connect(seedSet, SIGNAL(clicked()), this, SLOT(seedEdited()));

    seedLayout->setColumnStretch(2, 1);

    seedLayout->addWidget(seedSet, 3, 2);

    seedLabel->setVisible(false);

    seedEdit->setVisible(false);

    setRandomSeed();

    setRandomTheme();

    chooseMap->setCurrentIndex(0);

    mapChanged(0);

    // use signal "activated" rather than currentIndexChanged

    // because index is somtimes changed a few times in a row programmatically

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

    // update model views after model changes (to e.g. re-adjust separators)

    connect(&DataManager::instance(), SIGNAL(updated()), this, SLOT(updateModelViews()));

}

void HWMapContainer::setImage(const QImage newImage)

{

    QPixmap px(m_previewSize);

    QPixmap pxres(px.size());

    QPainter p(&pxres);

    px.fill(Qt::yellow);

    QBitmap bm = QBitmap::fromImage(newImage);

    px.setMask(bm);

    p.fillRect(pxres.rect(), 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)

{

    if (chooseMap->currentIndex() != index)

        chooseMap->setCurrentIndex(index);

    if (index < 0)

    {

        m_mapInfo.type = MapModel::Invalid;

        updatePreview();

        return;

    }

    Q_ASSERT(chooseMap->itemData(index, Qt::UserRole + 1).canConvert<MapModel::MapInfo>());

    m_mapInfo = chooseMap->itemData(index, Qt::UserRole + 1).value<MapModel::MapInfo>();

    m_curMap = m_mapInfo.name;

    switch(m_mapInfo.type)

    {

        case MapModel::GeneratedMap:

            mapgen = MAPGEN_REGULAR;

            gbThemes->show();

            lblFilter->show();

            cbTemplateFilter->show();

            maze_size_label->hide();

            cbMazeSize->hide();

            break;

        case MapModel::GeneratedMaze:

            mapgen = MAPGEN_MAZE;

            gbThemes->show();

            lblFilter->hide();

            cbTemplateFilter->hide();

            maze_size_label->show();

            cbMazeSize->show();

            break;

        case MapModel::HandDrawnMap:

            mapgen = MAPGEN_DRAWN;

            gbThemes->show();

            lblFilter->hide();

            cbTemplateFilter->hide();

            maze_size_label->hide();

            cbMazeSize->hide();

            break;

        default:

            mapgen = MAPGEN_MAP;

            gbThemes->hide();

            lblFilter->hide();

            cbTemplateFilter->hide();

            maze_size_label->hide();

            cbMazeSize->hide();

            m_theme = m_mapInfo.theme;

    }

    // the map has no pre-defined theme, so let's use the selected one

    if (m_mapInfo.theme.isEmpty())

    {

        m_theme = lvThemes->currentIndex().data().toString();

        emit themeChanged(m_theme);

    }

    updatePreview();

    emit mapChanged(m_curMap);

    emit mapgenChanged(mapgen);

}

// 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));

    QString text = (hhLimit > 0) ? QString::number(hhLimit) : "?";

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

    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::askForGeneratedPreview()

{

    pMap = new HWMap();

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

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

    connect(pMap, SIGNAL(destroyed(QObject *)), this, SLOT(onPreviewMapDestroyed(QObject *)));

    pMap->getImage(m_seed,

                   getTemplateFilter(),

                   get_mapgen(),

                   getMazeSize(),

                   getDrawnMapData()

                  );

    setHHLimit(0);

    const QPixmap waitIcon(":/res/iconTime.png");

    QPixmap waitImage(m_previewSize);

    QPainter p(&waitImage);

    p.fillRect(waitImage.rect(), linearGrad);

    int x = (waitImage.width() - waitIcon.width()) / 2;

    int y = (waitImage.height() - waitIcon.height()) / 2;

    p.drawPixmap(QPoint(x, y), waitIcon);

    addInfoToPreview(waitImage);

}

void HWMapContainer::themeSelected(const QModelIndex & current, const QModelIndex &)

{

    m_theme = current.data().toString();

    gbThemes->setIcon(qVariantValue<QIcon>(current.data(Qt::UserRole)));

    emit themeChanged(m_theme);

}

QString HWMapContainer::getCurrentSeed() const

{

    return m_seed;

}

QString HWMapContainer::getCurrentMap() const

{

    if(chooseMap->currentIndex() < MAPGEN_MAP) return QString();

    return(m_curMap);

}

QString HWMapContainer::getCurrentTheme() const

{

    return(m_theme);

}

bool HWMapContainer::getCurrentIsMission() const

{

    return(m_mapInfo.type == MapModel::MissionMap);

}

int HWMapContainer::getCurrentHHLimit() const

{

    return hhLimit;

}

QString HWMapContainer::getCurrentScheme() const

{

    return(m_mapInfo.scheme);

}

QString HWMapContainer::getCurrentWeapons() const

{

    return(m_mapInfo.weapons);

}

quint32 HWMapContainer::getTemplateFilter() const

{

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

}

void HWMapContainer::resizeEvent ( QResizeEvent * event )

{

    Q_UNUSED(event);

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

}

void HWMapContainer::intSetSeed(const QString & seed)

{

    m_seed = seed;

    if (seed != seedEdit->text())

        seedEdit->setText(seed);

}

void HWMapContainer::setSeed(const QString & seed)

{

    intSetSeed(seed);

    if ((m_mapInfo.type == MapModel::GeneratedMap) || (m_mapInfo.type == MapModel::GeneratedMaze))

        updatePreview();

}

void HWMapContainer::intSetMap(const QString & map)

{

    m_curMap = map;

    int id = m_mapModel->indexOf(map);

    mapChanged(id);

}

void HWMapContainer::setMap(const QString & map)

{

    if ((m_mapInfo.type == MapModel::Invalid) || (map != m_mapInfo.name))

        intSetMap(map);

}

void HWMapContainer::setTheme(const QString & theme)

{

    QModelIndexList mdl = m_themeModel->match(m_themeModel->index(0), Qt::DisplayRole, theme);

    if(mdl.size())

        lvThemes->setCurrentIndex(mdl.at(0));

}

void HWMapContainer::setRandomMap()

{

    int idx;

    setRandomSeed();

    switch(m_mapInfo.type)

    {

        case MapModel::GeneratedMap:

        case MapModel::GeneratedMaze:

            setRandomTheme();

            break;

        case MapModel::HandDrawnMap:

            emit drawMapRequested();

            break;

        case MapModel::MissionMap:

        case MapModel::StaticMap:

            // get random map of same type

            idx = m_mapModel->randomMap(m_mapInfo.type);

            mapChanged(idx);

            break;

        case MapModel::Invalid:

            mapChanged(0);

    }

}

void HWMapContainer::setRandomSeed()

{

    setSeed(QUuid::createUuid().toString());

    emit seedChanged(m_seed);

}

void HWMapContainer::setRandomTheme()

{

    if(!m_themeModel->rowCount()) return;

    quint32 themeNum = rand() % m_themeModel->rowCount();

    lvThemes->setCurrentIndex(m_themeModel->index(themeNum));

}

void HWMapContainer::intSetTemplateFilter(int filter)

{

    cbTemplateFilter->setCurrentIndex(filter);

    emit newTemplateFilter(filter);

}

void HWMapContainer::setTemplateFilter(int filter)

{

    intSetTemplateFilter(filter);

    if (m_mapInfo.type == MapModel::GeneratedMap)

        updatePreview();

}

MapGenerator HWMapContainer::get_mapgen(void) const

{

    return mapgen;

}

int HWMapContainer::getMazeSize(void) const

{

    return cbMazeSize->currentIndex();

}