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#include <QGraphicsView>

#include <QStyleOptionGraphicsItem>

#include <QGraphicsSceneResizeEvent>

#include <QPixmap>

#include <QFont>

#include "themeevent.h"

#include "theme.h"

#include "topbar.h"

#include "mainview.h"

TopBar::TopBar(QGraphicsView* mainView, QGraphicsWidget* parent) :

    GvbWidget(parent), m_mainView(mainView), m_isLimeTheme(false),

    m_orientation(TopBar::None), m_topBarPixmap(), m_sizesBlue(), m_sizesLime()

{

    setDefaultSizes();

    m_titleFont = Theme::p()->font(Theme::TitleBar);

    m_statusFont = Theme::p()->font(Theme::StatusBar);

    connect(Theme::p(), SIGNAL(themeChanged()), this, SLOT(themeChange()));

}

TopBar::~TopBar()

{

}

void TopBar::resizeEvent(QGraphicsSceneResizeEvent* /*event*/)

{

    //Check orientation

    QString topbarName;

    QSize mainViewSize = m_mainView->size();

    int rotationAngle = static_cast<MainView*>(m_mainView)->rotationAngle(); 

    if(rotationAngle == 90 || rotationAngle == 270 ) {

       int wd = mainViewSize.width();

       int ht = mainViewSize.height();

       mainViewSize.setWidth(ht);

       mainViewSize.setHeight(wd);

    }

    bool m_orientationChanged = false;

    if(mainViewSize.height() >= mainViewSize.width()) {

        if(m_orientation == TopBar::Landscape)

            m_orientationChanged = true;

        m_orientation = TopBar::Portrait;

        topbarName = "topbar.svg";

    }

    else {

        if(m_orientation == TopBar::Portrait)

            m_orientationChanged = true;

        m_orientation = TopBar::Landscape;

        topbarName = "topbar_horisontal.svg";

    }

    //Calculate new size, resize by height, don't make it wider than the screen

    QHash<QString, QSize>sizes = (Theme::p()->theme() == Theme::Blue) ? 

        m_sizesBlue : m_sizesLime;

    //Get current size for topbarpixmap

    QSize currentSize = !m_topBarPixmap.isNull() && !m_orientationChanged ? 

            m_topBarPixmap.size() : sizes[topbarName];

    QSize newSize = !m_orientationChanged ? QSize(currentSize) : sizes[topbarName];

    //Scale according to aspect ratio

    newSize.scale(size().toSize(), Qt::KeepAspectRatio);

    //fix width to window widht if previous scaling produced too narrow image

    if(newSize.width() < size().width()) {

        newSize.scale(size().toSize(), Qt::KeepAspectRatioByExpanding);

    }

    //Calculate scaling factor for rest of the graphics scaling

    qreal scaleFactor = (newSize.width() *1.0) / (currentSize.width() * 1.0);

    //Scale graphics, if the scalefactor applies

    //This is really heavy since the SVG graphics are read again from the resource

    if(scaleFactor != 1 || m_topBarPixmap.isNull() )  {

        m_topBarPixmap = Theme::p()->pixmap(topbarName, newSize );

        m_topBarUserIcon = Theme::p()->pixmap("user_default_icon.svg", 

                !m_topBarUserIcon.isNull() && !m_orientationChanged ? m_topBarUserIcon.size()* scaleFactor : sizes["user_default_icon.svg"] * scaleFactor);

        m_topBarUserStatus = Theme::p()->pixmap("user_status_online.svg", 

                !m_topBarUserStatus.isNull() && !m_orientationChanged ? m_topBarUserStatus.size() * scaleFactor : sizes["user_status_online.svg"] * scaleFactor);

        m_topBarStatusBarLeft = Theme::p()->pixmap("status_field_left.svg", 

                !m_topBarStatusBarLeft.isNull() && !m_orientationChanged ? m_topBarStatusBarLeft.size()* scaleFactor : sizes["status_field_left.svg"] * scaleFactor);

        m_topBarStatusBarRight = Theme::p()->pixmap("status_field_right.svg",

                !m_topBarStatusBarRight.isNull() && !m_orientationChanged ? m_topBarStatusBarRight.size()* scaleFactor : sizes["status_field_right.svg"] * scaleFactor);

        m_topBarStatusBarMiddle = Theme::p()->pixmap("status_field_middle.svg",

                !m_topBarStatusBarMiddle.isNull() && !m_orientationChanged ? m_topBarStatusBarMiddle.size() * scaleFactor : QSize(185, sizes["status_field_middle.svg"].height()) * scaleFactor);

        //Update the sizeHint to match the size of the scaled m_topBarPixmap

        updateGeometry();

        //Point Update - Positions relative to the Top Bar "Backgroud" size.

        //TODO: consider some layout instead of calculating relative locations

        QSize topBarPixmapSize = m_topBarPixmap.size();

        QSize topBarUserIconSize = m_topBarUserIcon.size();

        QSize topBarUserStatusSize = m_topBarUserStatus.size();

        QSize topBarStatusBarLeftSize = m_topBarStatusBarLeft.size();

        QSize topBarStatusBarMiddleSize = m_topBarStatusBarMiddle.size();

        //Location for Title text 5% width, 35% heigth of the background pixmap

        m_topBarTitlePoint = QPoint(topBarPixmapSize.width()* 0.05, 

                topBarPixmapSize.height() * 0.35);

        //User Icon location

        //Placing 70% of the width and 10% of the height of the top bar background

        m_topBarUserIconPoint = QPoint((topBarPixmapSize.width() * 0.7), (topBarPixmapSize.height() * 0.1));

        //If Blue theme is in use - position user status icon on the right side of the user icon

        if(!m_isLimeTheme) {

            //Place the status icon on top of the right edge of the user icon, lower it by 35% of the height of the user icon

            m_topBarUserStatusPoint = QPoint( ( (m_topBarUserIconPoint.x()+topBarUserIconSize.width() ) - 

                    ( topBarUserStatusSize.width()/2 )), 

                (m_topBarUserIconPoint.y() + (topBarUserIconSize.height() * 0.35 )));

        }

        //If Lime theme is in use - position user status icon on the left side of the user icon

        else {

            //Place the status icon on top of the left side of the user icon, lower it by 50% of the height of the user icon

            //and move left by 5% of the icon

            m_topBarUserStatusPoint = QPoint(  m_topBarUserIconPoint.x() + ( topBarUserIconSize.width() * 0.05), 

                        (m_topBarUserIconPoint.y() + (topBarUserIconSize.height() * 0.5 )));

        }

        //Status bar

        //Placing the left side of the status bar  5% of the width, 50% of the height of the top bar background

        //Set the text baseline 80% of the height of the status bar

        m_topBarStatusBarLeftPoint = QPoint( (topBarPixmapSize.width()* 0.05), 

                                                        (topBarPixmapSize.height() * 0.5));

        m_topBarStatusBarMiddlePoint = QPoint( (m_topBarStatusBarLeftPoint.x() + topBarStatusBarLeftSize.width()), 

                                                            (m_topBarStatusBarLeftPoint.y()));

        m_topBarStatusBarRightPoint = QPoint( (m_topBarStatusBarMiddlePoint.x() + topBarStatusBarMiddleSize.width()), 

                                                        (m_topBarStatusBarMiddlePoint.y() ) );

        m_topBarStatusBarTextPoint = QPoint(m_topBarStatusBarMiddlePoint.x(), 

                                                        m_topBarStatusBarMiddlePoint.y() + (topBarStatusBarMiddleSize.height()*0.8) );

    } //if scalefactor

}

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

{

    //Topbar background

    painter->drawPixmap(option->exposedRect, m_topBarPixmap, option->exposedRect);

    //User Icon

    painter->drawPixmap(m_topBarUserIconPoint, m_topBarUserIcon);

    //User Status

    painter->drawPixmap(m_topBarUserStatusPoint, m_topBarUserStatus);

    //Status bar

    painter->drawPixmap(m_topBarStatusBarLeftPoint, m_topBarStatusBarLeft);

    painter->drawPixmap(m_topBarStatusBarMiddlePoint, m_topBarStatusBarMiddle);

    painter->drawPixmap(m_topBarStatusBarRightPoint, m_topBarStatusBarRight);

    //Title text

    painter->save();

    painter->setFont(m_titleFont);

    painter->setOpacity(0.7);

    painter->setPen(Qt::white);

    painter->drawText(m_topBarTitlePoint, QString("Contacts") );

    //Status text

    painter->setFont(m_statusFont);

    painter->setOpacity(1.0);

    painter->drawText(m_topBarStatusBarTextPoint, QString("My Status (fixed)") );

    painter->restore();

}

QRectF TopBar::boundingRect() const

{

    //It's possible that m_topBarPixmap is not allocated yet, 

    //in this case default size is used for setting boundingRect

    QHash<QString, QSize>sizes = (Theme::p()->theme() == Theme::Blue) ? 

        m_sizesBlue : m_sizesLime; 

    if(!m_topBarPixmap.isNull()) 

        return QRectF(0, 0, m_topBarPixmap.size().width(), m_topBarPixmap.size().height());

    else 

        return QRectF(0, 0, sizes["topbar.svg"].width(), sizes["topbar.svg"].height());

}

void TopBar::themeChange()

{

    m_titleFont = Theme::p()->font(Theme::TitleBar);

    m_statusFont = Theme::p()->font(Theme::StatusBar);

    //Calculate the scaling factor

    QHash<QString, QSize>sizes = (Theme::p()->theme() == Theme::Blue) ? 

        m_sizesBlue : m_sizesLime;

    QString topbarString= m_orientation == TopBar::Portrait ? 

            "topbar.svg" : "topbar_horisontal.svg";

    QSize topBarSize = sizes[topbarString];

    QSize newSize = QSize(topBarSize);

    //Scale according to aspect ratio

    newSize.scale(size().toSize(), Qt::KeepAspectRatio);

    //fix width to window widht if previous scaling produced too narrow image

    if(newSize.width() < size().width()) {

        newSize.scale(size().toSize(), Qt::KeepAspectRatioByExpanding);

    }

    //Calculate scaling factor for rest of the graphics scaling

    qreal scaleFactor = (newSize.width() *1.0) / (topBarSize.width() * 1.0);

    //Background

    m_topBarPixmap = Theme::p()->pixmap(topbarString, sizes[topbarString] * scaleFactor);

    //User Icon

    m_topBarUserIcon = Theme::p()->pixmap("user_default_icon.svg", sizes["user_default_icon.svg"] * scaleFactor);

    //User Status

    m_topBarUserStatus = Theme::p()->pixmap("user_status_online.svg", sizes["user_status_online.svg"] * scaleFactor); 

    //Status Bar 

    m_topBarStatusBarLeft = Theme::p()->pixmap("status_field_left.svg", sizes["status_field_left.svg"] * scaleFactor);

    m_topBarStatusBarRight = Theme::p()->pixmap("status_field_right.svg", sizes["status_field_right.svg"] * scaleFactor);

    m_topBarStatusBarMiddle = Theme::p()->pixmap("status_field_middle.svg", 

            QSize(185, sizes["status_field_middle.svg"].height())* scaleFactor);

    //Update Drawing points for Top Bar elements, points are relative to the top bar background size

    QSize topBarPixmapSize = m_topBarPixmap.size();

    QSize topBarUserIconSize = m_topBarUserIcon.size();

    QSize topBarUserStatusSize = m_topBarUserStatus.size();

    QSize topBarStatusBarLeftSize = m_topBarStatusBarLeft.size();

    QSize topBarStatusBarMiddleSize = m_topBarStatusBarMiddle.size(); 

    //Theme Check

    (Theme::p()->theme() == Theme::Lime) ? m_isLimeTheme = true : m_isLimeTheme = false;

    //User Icon location

    //Placing 70% of the width and 10% of the height of the top bar background

    m_topBarUserIconPoint = QPoint((0.7*topBarPixmapSize.width()), (0.1*topBarPixmapSize.height()));

    //If Blue theme is in use - position user status icon on the right side of the user icon

    if(!m_isLimeTheme) {

        //Place the status icon on top of the right edge of the user icon, lower it by 35% of the height of the user icon

        m_topBarUserStatusPoint = QPoint( ( (m_topBarUserIconPoint.x()+topBarUserIconSize.width() ) - ( topBarUserStatusSize.width()/2 )), 

            (m_topBarUserIconPoint.y() + (topBarUserIconSize.height() * 0.35 )));

    }

    //If Lime theme is in use - position user status icon on the left side of the user icon

    else {

        //Place the status icon on top of the left side of the user icon, lower it by 50% of the height of the user icon

        //and move left by 5% of the icon

        m_topBarUserStatusPoint = QPoint(  m_topBarUserIconPoint.x() + ( topBarUserIconSize.width() * 0.05), 

                    (m_topBarUserIconPoint.y() + (topBarUserIconSize.height() * 0.5 )));

    }

    //Status bar

    //Placing the left side of the status bar  5% of the width, 50% of the height of the top bar background

    //Set the text baseline 80% of the height of the status bar

    m_topBarStatusBarLeftPoint = QPoint( (topBarPixmapSize.width()* 0.05), 

                                                    (topBarPixmapSize.height() * 0.5));

    m_topBarStatusBarMiddlePoint = QPoint( (m_topBarStatusBarLeftPoint.x() + topBarStatusBarLeftSize.width()), 

                                                        (m_topBarStatusBarLeftPoint.y()));

    m_topBarStatusBarRightPoint = QPoint( (m_topBarStatusBarMiddlePoint.x() + topBarStatusBarMiddleSize.width()), 

                                                    (m_topBarStatusBarMiddlePoint.y() ) );

    m_topBarStatusBarTextPoint = QPoint(m_topBarStatusBarMiddlePoint.x(), 

                                                    m_topBarStatusBarMiddlePoint.y() + (topBarStatusBarMiddleSize.height()*0.8) );

    update();

}

QSizeF TopBar::sizeHint(Qt::SizeHint which, 

        const QSizeF &constraint) const 

{

    //It's possible that m_topBarPixmap is not allocated yet, 

    //in this case default size is used for setting size hint

    QHash<QString, QSize>sizes = (Theme::p()->theme() == Theme::Blue) ? 

        m_sizesBlue : m_sizesLime; 

    int height = !m_topBarPixmap.isNull() ? 

            m_topBarPixmap.height() : sizes["topbar.svg"].height(); 

    switch (which)

    {

    case Qt::MinimumSize:

        return QSizeF(-1, height);

    case Qt::MaximumSize:

        return QSizeF(-1, height);

    default:

        return QGraphicsWidget::sizeHint(which, constraint);

    }

}

void TopBar::setDefaultSizes()

{    

    m_sizesBlue["topbar.svg"] = QSize(356,96);

    m_sizesBlue["topbar_horisontal.svg"] = QSize(636,96);

    m_sizesBlue["user_default_icon.svg"] = QSize(68,68);

    m_sizesBlue["user_status_online.svg"] = QSize(38,38);

    m_sizesBlue["status_field_left.svg"] = QSize(14,24);

    m_sizesBlue["status_field_right.svg"] = QSize(10,24);

    m_sizesBlue["status_field_middle.svg"] = QSize(14,24);

    m_sizesLime["topbar.svg"] = QSize(356,96);

    m_sizesLime["topbar_horisontal.svg"] = QSize(636,96);

    m_sizesLime["user_default_icon.svg"] = QSize(84,68);

    m_sizesLime["user_status_online.svg"] = QSize(24,24);

    m_sizesLime["status_field_left.svg"] = QSize(14,24);

    m_sizesLime["status_field_right.svg"] = QSize(10,24);

    m_sizesLime["status_field_middle.svg"] = QSize(14,24);

}

void TopBar::mousePressEvent(QGraphicsSceneMouseEvent *event)

{

    QRect rect = m_topBarStatusBarMiddle.rect();

    rect.moveTopLeft(m_topBarStatusBarMiddlePoint);

    QPointF scenePoint = event->scenePos();

    if(rect.contains(scenePoint.toPoint())) {

        emit clicked();

    }

}