/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbApps module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include <QSettings>

#include <QStringList>

#include <QDir>

#include <QTimer>

#include <hbinstance.h>

#include <hbmenu.h>

#include <hbaction.h>

#include <hbicon.h>

#include <hblistwidgetitem.h>

#include <restricted/hbthemeservices_r.h>

#include <hblabel.h>

#include <hbiconitem.h>

#include <hbtoolbar.h>

#include <QDebug>

#include <QTime>

#include <QThread>

#include <QGesture>

#include <QGraphicsLinearLayout>

#include "themeselectionlist.h"

#include "themechangerdefs.h"

#include "settingsview.h"

#include "resourceview.h"

class PreviewView : public HbView

{

public:

    PreviewView(const QString &name, const QString &theme, QGraphicsItem* parent=0):

       HbView(parent), preview(0), themePath(theme)

    {

        QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Vertical);

        HbLabel *label = new HbLabel(tr("Apply theme %1?").arg(name));

        label->setFontSpec(HbFontSpec(HbFontSpec::Primary));

        label->setElideMode(Qt::ElideNone);

        layout->addItem(label);

        QString previewPath("");

        if (HbDeviceProfile::profile(this).orientation() == Qt::Horizontal) {

            previewPath = themePath + "/scalable/qtg_graf_theme_preview_lsc.";

        } else {

            previewPath = themePath + "/scalable/qtg_graf_theme_preview_prt.";

        }

        QString nvgPreview(previewPath + "nvg");

        QString svgPreview(previewPath + "svg");

        if (QFile::exists(nvgPreview)) {

            previewPath = nvgPreview;

        } else if (QFile::exists(svgPreview)) {

            previewPath = svgPreview;

        } else {

            previewPath = "qtg_large_corrupted";

        }

        preview = new HbIconItem(previewPath);

        preview->setAspectRatioMode(Qt::KeepAspectRatio);

        QSize s = HbDeviceProfile::profile(this).logicalSize();

        preview->setPreferredSize(s);

        layout->addItem(preview);

        this->setLayout(layout);

    }

    ~PreviewView()

    {

        delete preview;

    }

    void resizeEvent(QGraphicsSceneResizeEvent *event)

    {

        Q_UNUSED(event);

        if (preview) {

            QString previewPath("");

            if (HbDeviceProfile::profile(this).orientation() == Qt::Horizontal) {

                previewPath = themePath + "/scalable/qtg_graf_theme_preview_lsc.";

            } else {

                previewPath = themePath + "/scalable/qtg_graf_theme_preview_prt.";

            }

            QString nvgPreview(previewPath + "nvg");

            QString svgPreview(previewPath + "svg");

            if (QFile::exists(nvgPreview)) {

                previewPath = nvgPreview;

            } else if (QFile::exists(svgPreview)) {

                previewPath = svgPreview;

            } else {

                previewPath = "qtg_large_corrupted";

            }

            preview->setIconName(previewPath);

            preview->setAspectRatioMode(Qt::KeepAspectRatio);

            QSize s = HbDeviceProfile::profile(this).logicalSize();

            preview->setPreferredSize(s);

        }

    }

private:

    HbIconItem *preview;

    QString themePath;

};

/**

 * Constructor

 */

ThemeSelectionList::ThemeSelectionList(HbMainWindow *mainWindow):

                        themelist(new HbListWidget(this)),

                        rightMark(new HbIcon(QString("qtg_small_tick"))),

                        noMark(new HbIcon(QString(""))),

                        previewView(0),

                        settingsView(0),

                        resourceView(0)

{

    mMainWindow = mainWindow;

    connect(themelist, SIGNAL(activated(HbListWidgetItem *)),this, SLOT(setChosen(HbListWidgetItem *)));

    connect(themelist, SIGNAL(longPressed(HbListWidgetItem*, QPointF)),

            this, SLOT(onLongPressed(HbListWidgetItem*, QPointF)));

    setWidget(themelist);

    // Automatic updation of the themelist when some theme is installed or uninstalled

    // when the hbthemechanger app is open

    watcher=new QFileSystemWatcher();

    foreach(const QString &KThemeRootPath, rootPaths()) {

        if(!KThemeRootPath.contains("/romthemes")){

        watcher->addPath(KThemeRootPath+"/themes/icons/");

        }

    }

    connect(watcher,SIGNAL(directoryChanged(const QString &)),this,SLOT(updateThemeList(const QString &)));

    QObject::connect(this,SIGNAL(newThemeSelected(QString)),this,SLOT(sendThemeName(QString)));

    grabGesture(Qt::TapAndHoldGesture);

    HbAction *a = this->toolBar()->addAction(HbIcon("qtg_mono_settings"),tr("Settings"));

    connect(a, SIGNAL(triggered()), this, SLOT(showSettingsView()));

    a = this->toolBar()->addAction(HbIcon("qtg_mono_search"),tr("Resources"));

    connect(a, SIGNAL(triggered()), this, SLOT(showResourceView()));

    connect(hbInstance->theme(),SIGNAL(changeFinished()), this, SLOT(themeChanged()));

#ifdef THEME_CHANGER_TIMER_LOG

    idleTimer = new QTimer(this);

    connect(idleTimer, SIGNAL(timeout()), this, SLOT(processWhenIdle()));

    idleTimer->start(0); // to make a connection to server

#endif

}

/**

 * Destructor

 */

ThemeSelectionList::~ThemeSelectionList()

{

    // Set the theme to the applied theme before exiting.

    delete noMark;

    noMark=NULL;

    delete rightMark;

    rightMark=NULL;

    // Reset the item view

    themelist->reset();

    delete themelist;

    themelist=NULL;

    // Delete preview thubnails

    qDeleteAll(thumbnails);

    thumbnails.clear();

}

/**

 * displayThemes

 */

void ThemeSelectionList::displayThemes()

{

    rootThemes.clear();

    bool entryAdded = false;

    bool themePresent = false;

    foreach(const QString &KThemeRootPath, rootPaths()){

        dir.setPath(KThemeRootPath) ;

        QStringList list = dir.entryList(QDir::AllDirs|QDir::NoDotAndDotDot,QDir::Name);

        if(list.contains("themes",Qt::CaseInsensitive )) {

            themePresent = true;

            QDir root = KThemeRootPath;

            dir.setPath(root.path()+"/themes/icons/") ;

            QStringList iconthemeslist=dir.entryList(QDir::AllDirs|QDir::NoDotAndDotDot,QDir::Name);

            foreach(QString themefolder, iconthemeslist) {

                QDir iconThemePath(root.path()+"/themes/icons/"+themefolder);

                QFile themeIndexFile(root.path()+"/themes/"+themefolder+".themeindex");

                if(themeIndexFile.exists() && iconThemePath.exists("index.theme")) {

                    QSettings iniSetting(iconThemePath.path()+"/index.theme",QSettings::IniFormat);

                    iniSetting.beginGroup("Icon Theme");

                    QString hidden = iniSetting.value("Hidden").toString();

                    iniSetting.endGroup();

                    if((hidden == "true") ||( hidden == "")) {

                        iconthemeslist.removeOne(themefolder);

                    }

#ifdef Q_OS_SYMBIAN

                    if (KThemeRootPath[0] == 'z') {

#endif

                    rootThemes.append(iconThemePath.absolutePath());

#ifdef Q_OS_SYMBIAN

                }

#endif

                }

                else {

                     iconthemeslist.removeOne(themefolder);

                }

            }

            if(!entryAdded){

                rootThemes.append(":/themes/icons/hbdefault");

                //adding one default entry

                HbListWidgetItem *item = new HbListWidgetItem();

                item->setText("hbdefault");

                item->setSecondaryText(":/themes/icons/hbdefault");

                QString thumbPath(":/themes/icons/hbdefault/scalable/qtg_graf_theme_preview_thumbnail.svg");                    

                if (!QFile::exists(thumbPath)) {

                    thumbPath = "qtg_large_corrupted";

                }

                HbIcon *icon = new HbIcon(thumbPath);

                thumbnails.append(icon);

                item->setIcon(*icon);                                

                if (HbInstance::instance()->theme()->name() == "hbdefault") {

                    item->setSecondaryIcon(*rightMark);

                    themelist->addItem(item);                

                    themelist->setCurrentRow(themelist->count()-1);

                } else {

                    item->setSecondaryIcon(*noMark);

                    themelist->addItem(item);                

                }

                entryAdded = true;

            }

            list=iconthemeslist;

            for (int i=0; i <list.count();i++) {

                // populate theme list with existing themes

                HbListWidgetItem *item = new HbListWidgetItem();

                QSettings iniSetting(root.path()+"/themes/icons/"+list.at(i)+"/index.theme",QSettings::IniFormat);

                iniSetting.beginGroup("Icon Theme");

                QString name = iniSetting.value("Name").toString();

                iniSetting.endGroup();

                item->setText(name);

                item->setSecondaryText(root.path()+"/themes/icons/"+list.at(i));

                QString thumbPath(root.path()+"/themes/icons/"+list.at(i)+"/scalable/qtg_graf_theme_preview_thumbnail.");

                QString nvgPath(thumbPath + "nvg");

                QString svgPath(thumbPath + "svg");

                if (QFile::exists(nvgPath)) {

                    thumbPath = nvgPath;

                } else if (QFile::exists(svgPath)) {

                    thumbPath = svgPath;

                }

                else {

                    thumbPath = "qtg_large_corrupted";

                }

                HbIcon *icon = new HbIcon(thumbPath);

                thumbnails.append(icon);

                item->setIcon(*icon);

                if (QFileInfo(HbThemeServices::themePath()) == QFileInfo(item->secondaryText())) {

                    item->setSecondaryIcon(*rightMark);

                    themelist->addItem(item);

                    themelist->setCurrentRow(themelist->count()-1);

                }

                else {

                    item->setSecondaryIcon(*noMark);

                    themelist->addItem(item);

                }

            }

        }

    }

    //    else{//add a case for no theme ,make hbdefault entry

    if(!themePresent) {

            rootThemes.append(":/themes/icons/hbdefault");

            //adding one default entry

            HbListWidgetItem *item = new HbListWidgetItem();

            item->setText("hbdefault");

            item->setSecondaryText(":/themes/icons/hbdefault");

            QString thumbPath(":/themes/icons/hbdefault/scalable/qtg_graf_theme_preview_thumbnail.svg");                    

            if (!QFile::exists(thumbPath)) {

                thumbPath = "qtg_large_corrupted";

            }

            HbIcon *icon = new HbIcon(thumbPath);

            thumbnails.append(icon);

            item->setIcon(*icon);            

            item->setSecondaryIcon(*rightMark);

            themelist->addItem(item);

            QString themeName=HbInstance::instance()->theme()->name();

            if (themeName != "hbdefault")

            {

                emit newThemeSelected(":/themes/icons/hbdefault");

            }

        }

}

/**

 * setChosen

 */

void ThemeSelectionList::setChosen(HbListWidgetItem *item)

{

#ifdef THEME_CHANGER_TRACES

    qDebug() << "ThemeSelectionList::Setchosen with ThemeName: "<<item->secondaryText();

#endif

    if(iCurrentTheme != item->secondaryText()) {

#ifdef THEME_CHANGER_TIMER_LOG

        timer.start();

        qDebug() << "Selected theme: " << item->secondaryText();

#endif

        iCurrentTheme = item->secondaryText();

        QThread::currentThread()->setPriority(QThread::HighPriority);

        emit newThemeSelected(item->secondaryText());

    }

}

/**

 * updateThemeList

 */

void ThemeSelectionList::updateThemeList(const QString &path)

{

    Q_UNUSED(path);

    themelist->clear();

    this->displayThemes();

}

/**

 * sendThemeName

 */

void ThemeSelectionList::sendThemeName(const QString& name)

{

    HbThemeServices::setTheme(name);

}

/**

 * \internal

 */

QStringList ThemeSelectionList::rootPaths()

{

    QStringList rootDirs;

#if defined(Q_OS_SYMBIAN)

    rootDirs << "z:/resource/hb"

             << "c:/resource/hb"

             << "e:/resource/hb"

             << "f:/resource/hb";

#else

    QString envDir = qgetenv("HB_THEMES_DIR");

    if (!envDir.isEmpty())

        rootDirs << envDir;

#endif

#if defined(Q_OS_MAC)

    rootDirs << QDir::homePath() + "/Library/UI Extensions for Mobile";

#elif !defined(Q_OS_SYMBIAN)

    rootDirs << HB_RESOURCES_DIR;

#endif

    return rootDirs;

}

void ThemeSelectionList::onLongPressed(HbListWidgetItem* listViewItem, const QPointF& coords)

{

    Q_UNUSED(coords);

    if (previewView) {

        delete previewView;

        previewView = 0;

    }

    previewItem = listViewItem;

    QString theme = listViewItem->secondaryText();

    previewView = new PreviewView(listViewItem->text(), theme, this);

    mMainWindow->addView(previewView);

    HbAction *act = new HbAction(tr("Ok"));

    connect(act, SIGNAL(triggered()), this, SLOT(applyTheme()));

    previewView->toolBar()->addAction(act);

    act = new HbAction(tr("Cancel"));

    connect(act, SIGNAL(triggered()), this, SLOT(cancel()));

    previewView->toolBar()->addAction(act);

    act = new HbAction(Hb::BackNaviAction);

    connect(act, SIGNAL(triggered()), this, SLOT(cancel()));

    previewView->setNavigationAction(act);

    mMainWindow->setCurrentView(previewView);

}

void ThemeSelectionList::cancel()

{

    mMainWindow->setCurrentView(this);

    mMainWindow->removeView(previewView);

}

void ThemeSelectionList::applyTheme()

{

    if (previewItem) {

        setChosen(previewItem);

    }

    mMainWindow->setCurrentView(this);

    mMainWindow->removeView(previewView);

}

void ThemeSelectionList::showSettingsView()

{

    if (!settingsView) {

        settingsView = new SettingsView(rootThemes, mMainWindow, this);

    }

    mMainWindow->setCurrentView(settingsView);

}

void ThemeSelectionList::showResourceView()

{

    if (!resourceView) {

        resourceView = new ResourceView(mMainWindow, this);

    }

    mMainWindow->setCurrentView(resourceView);

}

void ThemeSelectionList::themeChanged()

{

    QString currentTheme = HbThemeServices::themePath();

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

        HbListWidgetItem *item = themelist->item(i);

        if (item->secondaryText() == currentTheme) {

            item->setSecondaryIcon(*rightMark);

        } else {

            item->setSecondaryIcon(*noMark);

        }

    }

#ifdef THEME_CHANGER_TIMER_LOG

    idleTimer->start(0);

#endif //THEME_CHANGER_TIMER_LOG

}

#ifdef THEME_CHANGER_TIMER_LOG

void ThemeSelectionList::processWhenIdle()

{    

    qDebug() << "Theme changed applied in " << timer.elapsed() << " msec";

    idleTimer->stop();

    QThread::currentThread()->setPriority(QThread::NormalPriority);    

}

#endif //THEME_CHANGER_TIMER_LOG