/* ============================================================
*
* This file is a part of the rekonq project
*
* Copyright (C) 2010 by Andrea Diamantini <adjam7 at gmail dot 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; either version 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 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, see <http://www.gnu.org/licenses/>.
*
* ============================================================ */


// Self Includes
#include "adblockwidget.h"
#include "adblockwidget.moc"

// Auto Includes
#include "rekonq.h"

// KDE Includes
#include <KSharedConfig>
#include <KIcon>
#include <KDebug>

// Qt Includes
#include <QString>
#include <QWhatsThis>
#include <QListWidgetItem>


AdBlockWidget::AdBlockWidget(QWidget *parent)
    : QWidget(parent)
    , _changed(false)
{
    setupUi(this);
    
    hintLabel->setText( i18n("<qt>Filter expression (e.g. <tt>http://www.example.com/ad/*</tt>, <a href=\"filterhelp\">more information</a>):") );
    connect( hintLabel, SIGNAL(linkActivated(const QString &)), this, SLOT(slotInfoLinkActivated(const QString &)) );
 
    listWidget->setSortingEnabled(true);
    listWidget->setSelectionMode(QAbstractItemView::SingleSelection);
    
    searchLine->setListWidget(listWidget);
    
    insertButton->setIcon( KIcon("list-add") );
    connect( insertButton, SIGNAL( clicked() ), this, SLOT( insertRule() ) );
            
    removeButton->setIcon( KIcon("list-remove") );
    connect( removeButton, SIGNAL( clicked() ), this, SLOT( removeRule() ) );
    
    load();
    
    // emit changed signal
    connect( insertButton,       SIGNAL( clicked() ),           this, SLOT( hasChanged() ) );
    connect( removeButton,       SIGNAL( clicked() ),           this, SLOT( hasChanged() ) );
    connect( checkEnableAdblock, SIGNAL( stateChanged(int) ),   this, SLOT( hasChanged() ) );
    connect( checkHideAds,       SIGNAL( stateChanged(int) ),   this, SLOT( hasChanged() ) );
    connect( spinBox,            SIGNAL( valueChanged(int) ),   this, SLOT( hasChanged() ) );
}


void AdBlockWidget::slotInfoLinkActivated(const QString &url)
{
    Q_UNUSED(url)
    
    QString hintHelpString = i18n("<qt><p>Enter an expression to filter. Filters can be defined as either:"
                                  "<ul><li>a shell-style wildcard, e.g. <tt>http://www.example.com/ads*</tt>, the wildcards <tt>*?[]</tt> may be used</li>"
                                  "<li>a full regular expression by surrounding the string with '<tt>/</tt>', e.g. <tt>/\\/(ad|banner)\\./</tt></li></ul>"
                                  "<p>Any filter string can be preceded by '<tt>@@</tt>' to whitelist (allow) any matching URL, "
                                  "which takes priority over any blacklist (blocking) filter.");

    QWhatsThis::showText( QCursor::pos(), hintHelpString );
}


void AdBlockWidget::insertRule()
{
    QString rule = addFilterLineEdit->text();
    if(rule.isEmpty())
        return;
    
    listWidget->addItem( rule );
    addFilterLineEdit->clear();
}


void AdBlockWidget::removeRule()
{
        listWidget->takeItem( listWidget->currentRow() );    
}


void AdBlockWidget::load()
{
    bool isAdBlockEnabled = ReKonfig::adBlockEnabled();
    checkEnableAdblock->setChecked(isAdBlockEnabled);
    
    bool areImageFiltered = ReKonfig::hideAdsEnabled();
    checkHideAds->setChecked(areImageFiltered);
    
    int days = ReKonfig::updateInterval();
    spinBox->setValue( days );
    
    QStringList subscriptions = ReKonfig::subscriptionTitles();

    // load automatic rules
    foreach(QString sub, subscriptions)
    {
        QTreeWidgetItem *subItem = new QTreeWidgetItem(treeWidget);
        subItem->setText(0, sub);
        loadRules(subItem);
    }
    
    // load local rules
    KSharedConfig::Ptr config = KGlobal::config();
    KConfigGroup localGroup( config, "rules" );
    QStringList rules = localGroup.readEntry( "local-rules" , QStringList() );
    foreach(const QString &rule, rules)
    {
        listWidget->addItem( rule );
    }
}


void AdBlockWidget::loadRules(QTreeWidgetItem *item)
{
    KSharedConfig::Ptr config = KGlobal::config();
    KConfigGroup localGroup( config, "rules" );
    
    QString str = item->text(0) + "-rules";
    kDebug() << str;
    QStringList rules = localGroup.readEntry( str , QStringList() );
    
    foreach(const QString &rule, rules)
    {
        QTreeWidgetItem *subItem = new QTreeWidgetItem(item);
        subItem->setText(0, rule);
    }
}


void AdBlockWidget::save()
{
    int n;

    // local rules
    KSharedConfig::Ptr config = KGlobal::config();
    KConfigGroup localGroup( config , "rules" );
   
    QStringList localRules;
    
    n = listWidget->count();
    for(int i = 0; i < n; ++i)
    {
        QListWidgetItem *item = listWidget->item(i);
        localRules << item->text();
    }
    localGroup.writeEntry( "local-rules" , localRules );

    ReKonfig::setAdBlockEnabled( checkEnableAdblock->isChecked() );
    ReKonfig::setHideAdsEnabled( checkHideAds->isChecked() );
    ReKonfig::setUpdateInterval( spinBox->value() );

    _changed = false;
    emit changed(false);
}


void AdBlockWidget::hasChanged()
{
    _changed = true;
    emit changed(true);
}


bool AdBlockWidget::changed()
{
    return _changed;
}