/*

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

* All rights reserved.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU Lesser General Public License as published by

* the Free Software Foundation, version 2.1 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 Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public License

* along with this program.  If not,

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

*

* Description:

*

*/

#include <QtGui>

#include "mostvisitedpagestore.h"

#include "linearflowsnippet.h"

#include "mostvisitedpageview.h"

#include "webpagecontroller.h"

#include "HistoryManager.h"

#include "webpagedata.h"

#include "ExternalEventCharm.h"

#include "Utilities.h"

#include "wrtbrowsercontainer.h"

#include "wrtbrowsercontainer_p.h"

const int KLinearSnippetHeight = 120;

namespace GVA {

MostVisitedPagesWidget::MostVisitedPagesWidget(ChromeSnippet* snippet, ChromeWidget* chrome)

  : ChromeItem(snippet, chrome->layout())

  , m_parent(chrome->layout())

  , m_chrome(chrome)

  , m_flowInterface(0)

  , m_hideOnClose(true)

  , m_externalEventCharm(0)

{

    setFlags(QGraphicsItem::ItemDoesntPropagateOpacityToChildren);

    setOpacity(0.5);

    m_mostVisitedPageStore = new MostVisitedPageStore();

    WebPageController* pageController = WebPageController::getSingleton();

    connect(pageController, SIGNAL(loadFinished(const bool)), this, SLOT(onLoadFinished(const bool)));

    connect(pageController, SIGNAL(loadFinishedForBackgroundWindow(const bool, WRT::WrtBrowserContainer*)), this, SLOT(onLoadFinishedForBackgroundWindow(const bool, WRT::WrtBrowserContainer*)));

    connect(WRT::HistoryManager::getSingleton(),SIGNAL(historyCleared()),this,SLOT(clearMVStore()));

    //Registering for handling External Events

    m_externalEventCharm = new ExternalEventCharm(this);

    safe_connect(m_externalEventCharm, SIGNAL(externalMouseEvent(QEvent*, const QString &, const QString &)),

        		snippet, SIGNAL(externalMouseEvent(QEvent*, const QString &, const QString &)));

}

MostVisitedPagesWidget::~MostVisitedPagesWidget()

{

    if (m_flowInterface)

        m_flowInterface->deleteLater();

    if (m_mostVisitedPageStore)

        delete m_mostVisitedPageStore;

    if(m_externalEventCharm)

        delete m_externalEventCharm;

    WebPageController* pageController = WebPageController::getSingleton();

    disconnect(pageController, SIGNAL(loadFinished(const bool)), this, SLOT(onLoadFinished(const bool)));

    disconnect(WRT::HistoryManager::getSingleton(),SIGNAL(historyCleared()),this,SLOT(clearMVStore()));

}

void MostVisitedPagesWidget::open()

{

    if (m_flowInterface)

        delete m_flowInterface;

    m_flowInterface = new GVA::LinearFlowSnippet(this);

    m_flowInterface->setZValue(m_parent->zValue() + 1);

    m_flowInterface->resize(QSize(m_parent->size().width(), KLinearSnippetHeight));

    connect(m_flowInterface, SIGNAL(mouseEvent(QEvent::Type)),this,SIGNAL(mouseEvent(QEvent::Type)));

    //Initialize the page selection index

    m_selectIndex = -1;

    QString displayMode;

    if (m_parent->size().width() > m_parent->size().height()) {

        displayMode = "Landscape";

    } else {

        displayMode = "Portrait";

    }

    MostVisitedPageList mvPageList = m_mostVisitedPageStore->pageList();

    for (int i = 0; i < mvPageList.size(); i++) {

        QImage *pageThumbnail = mvPageList[i]->m_pageThumbnail;

        bool removeTempThumbnail = false;

        if (!pageThumbnail) {

            removeTempThumbnail = true;

            pageThumbnail = new QImage("");

        }

        QUrl url = QUrl(mvPageList[i]->m_url);

        m_flowInterface->addSlide(*pageThumbnail, url.host());

        if (removeTempThumbnail) {

            delete pageThumbnail;

        }

    }

    setCenterIndex(displayMode);

    m_flowInterface->prepareStartAnimation();

    m_flowInterface->runStartAnimation();

    m_flowInterface->installEventFilter(this);

    connect(m_flowInterface, SIGNAL(ok(int)), this, SLOT(okTriggered(int)));

    connect(m_flowInterface, SIGNAL(endAnimationCplt()), this, SLOT(closeAnimationCompleted()));

}

void MostVisitedPagesWidget::close(bool hide)

{

    //This will trigger close animation after which

    //the cleanup is done in closeAnimationCompleted

    if (m_flowInterface)

        m_flowInterface->runEndAnimation();

    m_hideOnClose = hide;

}

void MostVisitedPagesWidget::updatePos(QPointF pos, qreal &toolBarHeight)

{

    QGraphicsWidget::setPos(pos);

    m_flowInterface->setPos(pos.x(), m_parent->size().height() - (toolBarHeight+KSpaceToolbarMVP) - KLinearSnippetHeight);

}

void MostVisitedPagesWidget::resize(const QSize &size)

{

    QGraphicsWidget::resize(size);

    m_flowInterface->resize(QSize(m_parent->size().width(), KLinearSnippetHeight));

}

{

    m_flowInterface->displayModeChanged(newMode);

}

void MostVisitedPagesWidget::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

{

    painter->fillRect(0, 0, size().width(), size().height(), QColor(255, 255, 255));

    QGraphicsWidget::paint(painter, option, widget);

}

void MostVisitedPagesWidget::setCenterIndex(QString displayMode)

{

    //display beginning of the film strip first

    m_flowInterface->setCenterIndex((displayMode == "Portrait") ? 1 : 2);

}

void MostVisitedPagesWidget::mousePressEvent(QGraphicsSceneMouseEvent* event)

{

    close();

}

void MostVisitedPagesWidget::okTriggered(int index)

{

    Q_ASSERT(m_flowInterface);

    m_selectIndex = index;

    close();

}

void MostVisitedPagesWidget::closeAnimationCompleted()

{

    if (!m_flowInterface)

        return;

    QGraphicsWidget::hide();

    disconnect(m_flowInterface, SIGNAL(ok(int)), this, SLOT(okTriggered(int)));

    disconnect(m_flowInterface, SIGNAL(endAnimationCplt()), this, SLOT(closeAnimationCompleted()));

    disconnect(m_flowInterface, SIGNAL(mouseEvent(QEvent::Type)),this,SIGNAL(mouseEvent(QEvent::Type)));

    m_flowInterface->removeEventFilter(this);

    m_flowInterface->deleteLater();

    m_flowInterface = NULL;

    if (m_selectIndex != -1)

        m_chrome->loadUrlToCurrentPage(m_mostVisitedPageStore->pageAt(m_selectIndex)->pageUrl());

    if (m_snippet->isVisible() && m_hideOnClose)

        m_snippet->ChromeSnippet::toggleVisibility();

    m_hideOnClose = false;

    emit closeComplete();

}

void MostVisitedPagesWidget::updateMVGeometry()

{

    qreal toolBarHeight;

    ChromeSnippet* visibleSnippet= m_chrome->getSnippet("WebViewToolbarId");

    if (visibleSnippet)

        toolBarHeight = visibleSnippet->widget()->geometry().height();

    resize(m_parent->size().toSize());

    updatePos(QPointF(0, 0), toolBarHeight);

}

 void MostVisitedPagesWidget::updateMVStore(WRT::WrtBrowserContainer *page)

  {

    Q_ASSERT(page);

    QUrl pageUrl = page->mainFrame()->url();

    int pageRank = 0;

    QImage* pageThumbnail = NULL;

    //check if page exists in store along with its thumbnail

    if (!m_mostVisitedPageStore->contains(pageUrl.toString(), true)) {

        qreal scale = 200.0 / page->viewportSize().width();

    }

    //if it is a new page to the store, get its rank from history

    //FIX ME : need to optimize this code

    pageRank = WRT::HistoryManager::getSingleton()->getPageRank(pageUrl.toString());

    m_mostVisitedPageStore->pageAccessed(pageUrl, pageThumbnail, pageRank);

  }

 void MostVisitedPagesWidget::onLoadFinished(const bool ok)

 {

     if (ok) {

        WRT::WrtBrowserContainer * activePage = WebPageController::getSingleton()->currentPage();

        updateMVStore(activePage);

     }

 }

 void MostVisitedPagesWidget::onLoadFinishedForBackgroundWindow(const bool ok, WRT::WrtBrowserContainer *page)

 {

     if (ok) {

         if (page)

		     updateMVStore(page);

     }

 }

void MostVisitedPagesWidget::clearMVStore()

{

}

} // endof namespace GVA