/*

 * Copyright (c) 2010 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 <QGraphicsLinearLayout>

#include <hbdocumentloader.h>

#include <hblabel.h>

#include <hbextendedlocale.h>

#include <hbframedrawer.h>

#include <hbframeitem.h>

#include <hbcolorscheme.h>

#include <hbevent.h>

#include <hbtapgesture.h>

#include <hbinstantfeedback.h>

#include "nmicons.h"

#include "nmcommon.h"

#include "nmhswidgetemailrow.h"

#include "nmhswidgetconsts.h"

#include "emailtrace.h"

NmHsWidgetEmailRow::NmHsWidgetEmailRow(QGraphicsItem *parent, Qt::WindowFlags flags) :

    HbWidget(parent, flags), 

    mSenderLabel(0), 

    mSubjectLabel(0), 

    mTimeLabel(0), 

    mNewMailIcon(0),

    mSeparatorIcon(0), 

    mMessageId(0),

    mBackgroundLayoutItem(0)

{

    NM_FUNCTION;

    grabGesture(Qt::TapGesture);

}

/*!

 Destructor

 */

NmHsWidgetEmailRow::~NmHsWidgetEmailRow()

{

    NM_FUNCTION;

}

/*!

 Returns id of message shown

 */

NmId NmHsWidgetEmailRow::messageId()

{

    NM_FUNCTION;

    return mMessageId;

}

/*

 Setup email row ui

  Must be called after constructor.

   /return true if loading succeeded, otherwise false. False indicates that object is unusable.

 */

bool NmHsWidgetEmailRow::setupUI()

    {

    NM_FUNCTION;

    if(!loadDocML() || !setupGraphics()){

        return false;

    }

    return true;

    }

/*!

 Loads layout data and child items from docml file 

  /return true if loading succeeded, otherwise false. False indicates that object is unusable.

 */

bool NmHsWidgetEmailRow::loadDocML()

{

    NM_FUNCTION;

    QT_TRY{   

        // Use document loader to load the contents

        HbDocumentLoader loader;

        bool ok(false);

        loader.load(KNmHsWidgetMailRowDocML, &ok);

        if (!ok) {

            NM_ERROR(1,"NmHsWidgetEmailRow::loadDocML fail @ loader");

            return false;

        }

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

        //Do the layout stuff and Set layout before next return to avoid memoryleak

        layout->setContentsMargins(KNmHsWidgetContentsMargin, KNmHsWidgetContentsMargin,

            KNmHsWidgetContentsMargin, KNmHsWidgetContentsMargin);

        layout->setSpacing(KNmHsWidgetContentsMargin);

        setLayout(layout);

        //find container widget

        QGraphicsWidget *container = loader.findWidget(KNmHsWidgetMailRowContainer);

        if (!container) {

            NM_ERROR(1,"NmHsWidgetEmailRow::loadDocML fail @ container");

            return false;

        }

        layout->addItem(container);

        //child items possible to update

        //separator

        mSeparatorIcon = static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailSeparatorIcon));

        //labels

        mSenderLabel = static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailRowSenderLabel));

        mSubjectLabel = static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailRowSubjectLabel));

        mTimeLabel = static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailRowTimeLabel));

        //icons

        mNewMailIcon = static_cast<HbWidget*> (loader.findWidget(KNmHsWidgetMailRowNewMailIcon));

        // KNmHsWidgetMailRowLeftIcon is not yet used, because followup information is not shown in client side

        // and thus it is not wanted to be shown in widget side

        mStatusIcons.append(static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailRowRightIcon)));

        mStatusIcons.append(static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailRowMiddleIcon)));

        mStatusIcons.append(static_cast<HbLabel*> (loader.findWidget(KNmHsWidgetMailRowLeftIcon)));

        //Verify that items are valid

        if (!mSenderLabel || !mSubjectLabel || !mTimeLabel || !mNewMailIcon || !mSeparatorIcon) {

            NM_ERROR(1,"NmHsWidgetEmailRow::loadDocML fail @ labels & icons");

            return false;

        }

        //Verify all mStatusIcons

        for (int i = 0; i < mStatusIcons.length(); i++) {

            if (!mStatusIcons.at(i)) {

                return false;

            }

        }

        return true;

    }

    QT_CATCH(...){

        return false;

    }

}

/*

 Setup graphics that cannot be loaded from docml.

  /return true if loading succeeded, otherwise false. False indicates that object is unusable.

 */

bool NmHsWidgetEmailRow::setupGraphics()

    {

    NM_FUNCTION;

    HbFrameDrawer* newMailIconFrameDrawer = 0;

    HbFrameItem* newMailIconFrameItem = 0;

    HbFrameDrawer* backgroundFrameDrawer = 0;

    QT_TRY{ 

        //separator icon

        HbIcon separatorIcon("qtg_graf_divider_h_thin");

        mSeparatorIcon->setIcon(separatorIcon);

        //new email icon

        newMailIconFrameDrawer = new HbFrameDrawer("qtg_fr_list_new_item",

            HbFrameDrawer::ThreePiecesVertical);

        newMailIconFrameItem = new HbFrameItem(newMailIconFrameDrawer);

        mNewMailIcon->setBackgroundItem(newMailIconFrameItem);

        //hide all the icons first to avoid blinking

        hideIcons();

        //pressed background

        backgroundFrameDrawer = new HbFrameDrawer("qtg_fr_hsitems_pressed", HbFrameDrawer::NinePieces);

        mBackgroundLayoutItem = new HbFrameItem( backgroundFrameDrawer );

        setBackgroundItem( mBackgroundLayoutItem );

        mBackgroundLayoutItem->hide();

        return true;

    }

    QT_CATCH(...){

        if(!newMailIconFrameItem && newMailIconFrameDrawer){

            delete newMailIconFrameDrawer;

            newMailIconFrameDrawer = NULL;

        }

        if(!mBackgroundLayoutItem && backgroundFrameDrawer){

            delete backgroundFrameDrawer;

            backgroundFrameDrawer = NULL;

        }

        return false;

    }

}

/*!

 Sets the data provided as a parameter to the UI components

 \param envelope message envelope representing an email

 */

void NmHsWidgetEmailRow::updateMailData(const NmMessageEnvelope& envelope)

{

    NM_FUNCTION;

    mEnvelope = NmMessageEnvelope(envelope);

    //hide all icons, so no previous data is messing with the new

    hideIcons();

    mMessageId = envelope.messageId();

    //Show sender name if it is available, otherwise show email address

    QString senderDisplayName = envelope.sender().displayName();

    if (!senderDisplayName.isNull() && !senderDisplayName.isEmpty()) {

        mSenderLabel->setPlainText(senderDisplayName);

    }

    else {

        mSenderLabel->setPlainText(envelope.sender().address());

    }

    //Set subject

    mSubjectLabel->setPlainText(envelope.subject());

    mMessageSentTime = envelope.sentTime();

    updateDateTime();

    //set new icons to widget based on the data

    setIconsToWidget( envelope );

    //set fonts color and size

    setFontsSize(mEnvelope.isRead());

    setHighlighedFontsColor(false);

    }

/*!

    updateDateTime to label using correct locale

*/

void NmHsWidgetEmailRow::updateDateTime()

    {

    NM_FUNCTION;

    //Set Date with locale support

    //Time shown if message is sent today, otherwise show date

    HbExtendedLocale locale = HbExtendedLocale::system();

    QDateTime now = QDateTime::currentDateTime();

    //change time to locale time. mMessageSentTime is always in GMT

    QDateTime localTime = mMessageSentTime.addSecs(locale.universalTimeOffset());

    if ( localTime.date() == now.date() )

        {

        //time format specification

        QString timeSpec = r_qtn_time_usual;

        mTimeLabel->setPlainText( locale.format(localTime.time(), timeSpec) );

        }

    else

        {

        QString dateSpec = r_qtn_date_without_year;

        mTimeLabel->setPlainText( locale.format(localTime.date(), dateSpec) );

        }

    }

/*!

 hide icons from widget

 */

void NmHsWidgetEmailRow::hideIcons()

{

    NM_FUNCTION;

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

        mStatusIcons.at(i)->hide();

    }

    mNewMailIcon->hide();

}

/*!

 Set icons to widget

 */

void NmHsWidgetEmailRow::setIconsToWidget(const NmMessageEnvelope& envelope)

{

    NM_FUNCTION;

    bool unreadMail = !envelope.isRead();

    bool attachment = envelope.hasAttachments();

    int priority = envelope.priority();

    if (unreadMail) {

        mNewMailIcon->show();

    }

    // Here we have list for priority and attachment icons. Later it is easy to add

    // followup icon or something else if needed.

    QList<HbIcon> iconList;

    // Priority icon is added to list first thus it is always shown most right.

    switch (priority) {

        case NmMessagePriorityLow:

            iconList.append(NmIcons::getIcon(NmIcons::NmIconPriorityLow));

            break;

        case NmMessagePriorityHigh:

            iconList.append(NmIcons::getIcon(NmIcons::NmIconPriorityHigh));

            break;

        case NmMessagePriorityNormal:

        default:

            // Normal priority has no icon

            break;

    }

    // Attachment icon is always shown on the left side of attachment icon if it

    // exists. Otherwise in the most right.

    if (attachment) {

        iconList.append(NmIcons::getIcon(NmIcons::NmIconAttachment));

    }

    // Here we show icons added to the iconList in the order they have been added.

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

        mStatusIcons.at(count)->setIcon(iconList.at(count));

        mStatusIcons.at(count)->show();

    }

}

/*!

    sets fonts size. Unread and read mails are shown differently

*/

void NmHsWidgetEmailRow::setFontsSize( bool read )

    {

    NM_FUNCTION;

    HbFontSpec fontSpec;

    if(!read){

        fontSpec.setRole(HbFontSpec::Primary);

        mTimeLabel->fontSpec().setRole(HbFontSpec::Primary);

    }

    else{

        fontSpec.setRole(HbFontSpec::Secondary);

        mTimeLabel->fontSpec().setRole(HbFontSpec::Secondary);

    }  

    qreal size;

    if (found) {

        fontSpec.setTextHeight(size);

    }

    mSenderLabel->setFontSpec(fontSpec);

    mSubjectLabel->setFontSpec(fontSpec);

    }

/*!

    sets fonts color.

    /param bool pressed indicates if row is pressed down or not

*/

void NmHsWidgetEmailRow::setHighlighedFontsColor( bool pressed )

    {

    NM_FUNCTION;

    QColor newFontColor;

    if(pressed){

        newFontColor = HbColorScheme::color("qtc_hs_list_item_pressed");

    }

    else if(mEnvelope.isRead()){

        newFontColor = HbColorScheme::color("qtc_hs_list_item_content_normal");

    }

    else{

        newFontColor = HbColorScheme::color("qtc_hs_list_item_title_normal");

    }

    mSenderLabel->setTextColor(newFontColor);

    mSubjectLabel->setTextColor(newFontColor);

    mTimeLabel->setTextColor(newFontColor);

    }

/*!

    change background highlight

    /param bool show if true then shown, false hide

*/

void NmHsWidgetEmailRow::showHighlight( bool show )

    {

    NM_FUNCTION;

    if(show){

        mBackgroundLayoutItem->show();

    }

    else{

        mBackgroundLayoutItem->hide();

    }

    }

/*

 * NmHsWidgetEmailRow::gestureEvent(QGestureEvent *event)

 */

void NmHsWidgetEmailRow::gestureEvent(QGestureEvent *event)

{

    NM_FUNCTION;

    if(!event){

        return;

    }

    HbTapGesture *gesture = qobject_cast<HbTapGesture *>(event->gesture(Qt::TapGesture));

    if(!gesture){

        return;

    }

    switch (gesture->state()) {

        case Qt::GestureStarted:

            setHighlighedFontsColor(true);

            showHighlight(true);

        break;

        case Qt::GestureCanceled:

            setHighlighedFontsColor(false);

            showHighlight(false);

        break;

        case Qt::GestureFinished:

            setHighlighedFontsColor(false);

            showHighlight(false);

            if (gesture->tapStyleHint() == HbTapGesture::Tap) {

                HbInstantFeedback::play(HbFeedback::BasicItem);

                emit mailViewerLaunchTriggered(mMessageId);

            }

        break;

    default: 

        break;

    }

}

/*

 * NmHsWidgetEmailRow::event()

 */

bool NmHsWidgetEmailRow::event( QEvent *event )

{

    NM_FUNCTION;

    QEvent::Type eventType = event->type();

    if( eventType == HbEvent::ThemeChanged ){

        setHighlighedFontsColor(false);

        return true;

    }

    return HbWidget::event(event);

}