/***************************************************************************
    Copyright 2008-2010 Daniel Laidig <d.laidig@gmx.de>
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "welcomescreen.h"
#include "buttondelegate.h"
#include "parleymainwindow.h"
#include "parleydocument.h"
#include "practice/themedbackgroundrenderer.h"
#include "practice/imagewidget.h"

#include <KMimeType>

#include <QStandardItemModel>
#include <QTimer>

WelcomeScreen::WelcomeScreen(ParleyMainWindow *parent)
    : KXmlGuiWindow(parent)
    , m_mainWindow(parent)
{
    // KXmlGui
    setXMLFile("welcomescreenui.rc");
    setObjectName("WelcomeScreen");

    m_widget = new Practice::ImageWidget(this);
    m_widget->setScalingEnabled(false, false);
    m_widget->setKeepAspectRatio(Qt::IgnoreAspectRatio);
    m_widget->setFadingEnabled(false);

    ui = new Ui::WelcomeScreen();
    ui->setupUi(m_widget);
    setCentralWidget(m_widget);

    QFont font = ui->recentLabel->font();
    font.setBold(true);
    ui->recentLabel->setFont(font);

    ui->newButton->setIcon(KIcon("document-new"));
    ui->openButton->setIcon(KIcon("document-open"));
    ui->ghnsButton->setIcon(KIcon("get-hot-new-stuff"));

    m_recentFilesModel = new QStandardItemModel(this);
    updateRecentFilesModel();
    ui->recentFiles->setModel(m_recentFilesModel);
    ui->recentFiles->setSelectionMode(QAbstractItemView::NoSelection);

    ButtonDelegate* delegate = new ButtonDelegate(ui->recentFiles, this);
    ui->recentFiles->setItemDelegate(delegate);

    ParleyDocument* doc = m_mainWindow->parleyDocument();
    connect(ui->newButton, SIGNAL(clicked()), doc, SLOT(slotFileNew()));
    connect(ui->openButton, SIGNAL(clicked()), doc, SLOT(slotFileOpen()));
    connect(ui->ghnsButton, SIGNAL(clicked()), doc, SLOT(slotGHNS()));
    if (KGlobalSettings::singleClick()) {
        connect(ui->recentFiles, SIGNAL(clicked(const QModelIndex&)), this, SLOT(slotDoubleClicked(const QModelIndex&)));
    } else {
        connect(ui->recentFiles, SIGNAL(doubleClicked(const QModelIndex&)), this, SLOT(slotDoubleClicked(const QModelIndex&)));
    }

    connect(m_mainWindow, SIGNAL(recentFilesChanged()), this, SLOT(updateRecentFilesModel()));

    KConfigGroup cfg(KSharedConfig::openConfig("parleyrc"), objectName());
    applyMainWindowSettings(cfg);

    m_themedBackgroundRenderer = new Practice::ThemedBackgroundRenderer(this, "startpagethemecache.bin");

    connect(Prefs::self(), SIGNAL(configChanged()), this, SLOT(setTheme()));
    setTheme();

    connect(m_themedBackgroundRenderer, SIGNAL(backgroundChanged(QPixmap)), this, SLOT(backgroundChanged(QPixmap)));
    connect(m_widget, SIGNAL(sizeChanged()), this, SLOT(updateBackground()));
}

WelcomeScreen::~WelcomeScreen()
{
    KConfigGroup cfg(KSharedConfig::openConfig("parleyrc"), objectName());
    saveMainWindowSettings(cfg);
}

void WelcomeScreen::updateRecentFilesModel()
{
    KConfig parleyConfig("parleyrc");
    KConfigGroup recentFilesGroup(&parleyConfig, "Recent Files");

    m_recentFilesModel->clear();
    for (int i = recentFilesGroup.keyList().count() / 2; i > 0 ; i--) {
        QString urlString = recentFilesGroup.readPathEntry("File" + QString::number(i), QString());
        QString nameString = recentFilesGroup.readEntry("Name" + QString::number(i), QString());

        KUrl url(urlString);

        QStandardItem* item = new QStandardItem;
        item->setEditable(false);
        item->setText(nameString + " (" + url.fileName() + ')');
        item->setToolTip(nameString + " (" + url.pathOrUrl() + ')');
        item->setData(QVariant(url), Qt::UserRole);

        item->setIcon(KIcon("practice-start"));

        m_recentFilesModel->appendRow(item);
    }
    if (m_recentFilesModel->rowCount(QModelIndex())) {
        ui->recentLabel->setText(i18n("Last Opened Collections"));
    } else {
        ui->recentLabel->clear();
    }
}

void WelcomeScreen::slotOpenUrl(const KUrl& url)
{
    if (!m_mainWindow->parleyDocument()->open(url)) {
        return;
    }
    m_mainWindow->showEditor();
}

void WelcomeScreen::slotDoubleClicked(const QModelIndex& index)
{
    KUrl url = index.data(Qt::UserRole).toUrl();
    m_openUrl = url;
    QTimer::singleShot(0, this, SLOT(slotDoubleClickOpen()));
}

void WelcomeScreen::slotDoubleClickOpen()
{
    slotPracticeUrl(m_openUrl);
}

void WelcomeScreen::slotPracticeUrl(const KUrl & url)
{
    if (!m_mainWindow->parleyDocument()->open(url)) {
        return;
    }
    m_mainWindow->showPracticeConfiguration();
}

void WelcomeScreen::backgroundChanged(const QPixmap &pixmap)
{
    m_widget->setPixmap(pixmap);
}

void WelcomeScreen::setTheme()
{
    m_themedBackgroundRenderer->setTheme(Prefs::theme());
    updateFontColors();
    updateBackground();
    m_widget->setContentsMargins(m_themedBackgroundRenderer->contentMargins());
}

void WelcomeScreen::updateFontColors()
{
    QPalette p(QApplication::palette());
    QColor c = m_themedBackgroundRenderer->fontColor("Start", p.color(QPalette::Active, QPalette::WindowText));
    p.setColor(QPalette::Base, Qt::transparent);
    p.setColor(QPalette::Text, c);
    p.setColor(QPalette::WindowText, c);
    m_widget->setPalette(p);
}

void WelcomeScreen::updateBackground()
{
    m_themedBackgroundRenderer->clearRects();
    m_themedBackgroundRenderer->addRect("startbackground", QRect(QPoint(), m_widget->size()));
    QRect headerRect = ui->headingLabel->frameGeometry();
    headerRect.setBottom(ui->recentFiles->frameGeometry().top() - 1);
    m_themedBackgroundRenderer->addRect("startheader", headerRect);
    m_themedBackgroundRenderer->addRect("recentfiles", ui->recentFiles->frameGeometry());
    QPixmap pixmap = m_themedBackgroundRenderer->getScaledBackground();
    if (!pixmap.isNull()) {
        m_widget->setPixmap(pixmap);
    }
    m_themedBackgroundRenderer->updateBackground();
}

#include "welcomescreen.moc"
