/*
 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of "Eclipse Public License v1.0""
 * which accompanies this distribution, and is available
 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
 *
 * Initial Contributors:
 * Nokia Corporation - initial contribution.
 *
 * Contributors:
 *
 * Description:  
 *   
 */

#include "cpthemeinfo.h"
#include "cpthemeutil.h"

#include <QStringList>
#include <QSettings>  
#include <QFileInfoList>
#include <QDir>
#include <QList>

#include <hbicon.h>
#include <hbinstance.h>
#include <restricted/hbthemeservices_r.h>

/*!
 * This class provides utility function to get Theme information.  
 */

#if defined(Q_OS_SYMBIAN)
#include <e32std.h>
#include <centralrepository.h>
        static const TUid KServerUid3={0x20022E82};
        static const TUint32 KDefaultThemeNameKey = 0x2;
  
#endif


    //Location of theme preview and background icons.
    static const QString KPreviewThumbnailNVG = "/scalable/qtg_graf_theme_preview_thumbnail.nvg";
    static const QString KPreviewThumbnailSVG = "/scalable/qtg_graf_theme_preview_thumbnail.svg";
    
    static const QString KBackgroundPrtNVG    = "/scalable/qtg_graf_screen_bg_prt.nvg";
    static const QString KBackgroundLscNVG    = "/scalable/qtg_graf_screen_bg_lsc.nvg";
    static const QString KBackgroundPrtSVG    = "/scalable/qtg_graf_screen_bg_prt.svg";
    static const QString KBackgroundLscSVG    = "/scalable/qtg_graf_screen_bg_lsc.svg";
    
    



/*
 * Builds a CpThemeInfo object given theme path and theme name.  It creates the name and 
 * preview icons for the object.  Creates a new CpThemeInfo objects. Caller takes ownership.
 * Returns NULL if can't build the object.
 */
CpThemeInfo* CpThemeUtil::buildThemeInfo(const QString& themePath, const QString& themeName)
{
    CpThemeInfo *themeInfo = new CpThemeInfo();
    QString iconPath;
    
    QString name = themeName;
    QString hidden = "";
    
    //first look into the index.theme file to get theme information.
   
    if(QFileInfo(themePath + "/index.theme").exists()) {
        QSettings iniSetting(themePath + "/index.theme", QSettings::IniFormat);
        iniSetting.beginGroup("Icon Theme");
        name = iniSetting.value("Name").toString();
        hidden = iniSetting.value("Hidden").toString();
        iconPath = iniSetting.value("PreviewThumbnailPath").toString();
        iniSetting.endGroup();
       
    }
                       
    if(name.isEmpty() || (hidden == "true") ||( hidden == "")) {
        return NULL;
    }
   
    themeInfo->setName(name);
    themeInfo->setItemType(CpThemeInfo::ThemeListItemType_default);
    themeInfo->setItemData(themePath);
          
    //Get the icons. Logic is as follow:
    /* 1. If the icon path is in index.theme and the icon exist, use it.
     * 2. Otherwise look for the icon in the theme folder.
     * 2. If preview icon doesn't exist, use background icon.
     * 3. If no icon exist (background or preview),use default theme icon.
     */
    if(iconPath.isEmpty() || !QFileInfo(themePath + iconPath).exists()){
        //Set thumbnail
        HbIcon themeIcon = getPreviewIcon(themePath);
        if(themeIcon.isNull()){
            QString defaultThemePath = defaultTheme();
            if(!defaultThemePath.isEmpty()) {
                themeIcon = getPreviewIcon(defaultThemePath);
            }
        }
        themeInfo->setIcon(themeIcon);
    } else {
        themeInfo->setIcon(HbIcon(themePath + iconPath));
    }
          
    return themeInfo;

}

/*!
 * given a path to the theme, returns the preview icon or just a Null icon
 * if it doesn't exist.
 */
HbIcon CpThemeUtil::getPreviewIcon(const QString& themePath)
{
    HbIcon themeIcon;
    if(QFileInfo(themePath + KPreviewThumbnailNVG).exists()){
        themeIcon = HbIcon(themePath + KPreviewThumbnailNVG);
    }else if(QFileInfo(themePath + KPreviewThumbnailSVG).exists()){
        themeIcon = HbIcon(themePath + KPreviewThumbnailSVG);
    }else if(QFileInfo(themePath + KBackgroundPrtNVG).exists()){
        themeIcon = HbIcon(themePath + KBackgroundPrtNVG);
    }else if(QFileInfo(themePath + KBackgroundPrtSVG).exists()){
        themeIcon = HbIcon(themePath + KBackgroundPrtSVG);
    }
    return themeIcon;
    
}

/*! Creates a list of CpThemeInfo objects representing theme information.
 *  
 */
QList<CpThemeInfo> CpThemeUtil::buildThemeList()
{
    QList<CpThemeInfo> themeList; 
    
    QList<QPair<QString, QString> > mThemesPathList = availableThemes();
    QPair<QString, QString>pair;
    foreach (pair, mThemesPathList) {
        QDir themeDir;
        QString name = pair.first;
        QString path = pair.second;
        themeDir.setPath( path ) ;
        CpThemeInfo* themeInfo;
        if(themeDir.exists("index.theme") &&
          (themeDir.exists("scalable") || themeDir.exists("pixmap") )) {
            themeInfo = buildThemeInfo(path, name);
            if(themeInfo && !themeInfo->name().isEmpty()) {
                themeList.append(*themeInfo);
            }
        }
    }
    qSort( themeList );
    return themeList;
}

/*!
 * Returns the default theme path. 
 */
QString CpThemeUtil::defaultTheme()
{
    //static because default theme doesn't change.
    static QString defaultThemePath("");
    
    if(defaultThemePath.isEmpty()) {
       

#ifdef Q_OS_SYMBIAN
        CRepository *repository = 0;
        TRAP_IGNORE(repository = CRepository::NewL(KServerUid3));
        if (repository) {
            TBuf<256> value;
            if (KErrNone == repository->Get((TUint32)KDefaultThemeNameKey, value)) {
                QString qvalue((QChar*)value.Ptr(), value.Length());
                defaultThemePath = qvalue.trimmed();
            }
            value.Zero();
           delete repository;
        }
          
#endif
        
    }
    return defaultThemePath;
}


const QStringList CpThemeUtil::themeDirectories(const QList<CpThemeInfo>& themeInfoList)
{
    QStringList themeDirs;
    
    foreach(const CpThemeInfo& themeInfo, themeInfoList) {
        QDir themePath(themeInfo.itemData());
        QString topDir;
        if(themePath.cdUp()) {
            topDir = themePath.path();
            if(!themeDirs.contains(topDir)) {
                themeDirs.append(topDir);
            }
        }
    }
    return themeDirs;
}

const QList< QPair< QString, QString > > CpThemeUtil::availableThemes( )
{
    
    QList<QPair<QString, QString> > result = HbThemeServices::availableThemes();
    return result;
    
}