#include "alertwidget.h"
#include "imageeffect.h"
#include "paintershadowtext.h"

#include <QtCore/QDebug>

#include <QtGui/QLabel>
#include <QtGui/QApplication>

AlertWidget::AlertWidget(QWidget *parent) : QWidget(parent)
{
    setObjectName("AlertWidget");

    lbPixmap = new QLabel(this);

    setFont(QFont("Gulim", 24, QFont::Bold));

    setMinimumSize(1, 1);
    setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
    setAttribute(Qt::WA_TranslucentBackground, true);

    _radius = 0;
    _timerAlpha = false;
    _currentAlpha = 0;
    _duration = 333;
    _delay = 8000;
}

AlertWidget::~AlertWidget()
{
    qDebug() << "destroyed: " << objectName();
}

void AlertWidget::setRadius(qreal radius)
{
    _radius = radius;

    updateSize();
    updatePixmap();
}

void AlertWidget::setMessage(const QString &message)
{
    _message = message.trimmed();

    _timerAlpha = false;
    _currentAlpha = 255;
    _timer.stop();
    _timer.start(_delay, this);

    updateSize();
    updatePixmap();

    setWindowOpacity(1.0);
}

void AlertWidget::setColor(QColor &text, QColor &shadow)
{
    _text = text;
    _shadow = shadow;

    updatePixmap();
}

void AlertWidget::updateSize()
{
    QRect fontRect = fontMetrics().boundingRect(QRect(), 0, _message);
    QRect available = QApplication::desktop()->availableGeometry(pos());

    setGeometry(
            available.width() / 2 - fontRect.width() / 2,
            available.height() / 2 - fontRect.height(),
            fontRect.width() + _radius * 2,
            fontRect.height() + _radius * 2);
}

void AlertWidget::updatePixmap()
{
    if(_currentAlpha > 0)
    {
        QImage image(size(), QImage::Format_ARGB32_Premultiplied);

        PainterShadowText shadow;

        shadow.setFont(font());
        shadow.setRadius(_radius);
        shadow.setTextColor(_text);
        shadow.setShadowColor(_shadow);

        shadow.drawTextPen(0, 0, image, _message);

        lbPixmap->setPixmap(QPixmap::fromImage(image));
        lbPixmap->adjustSize();
    }
    else
    {
        QPixmap pixmap(size());

        pixmap.fill(QColor(0, 0, 0, 0));

        lbPixmap->setPixmap(pixmap);
    }
}

/**
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  */
void AlertWidget::timerEvent(QTimerEvent *event)
{
    Q_UNUSED(event);

    if(_timerAlpha)
    {
        _currentAlpha -= 255 * 33 / _duration;

        if(_currentAlpha <= 0)
        {
            setWindowOpacity(0.0f);

            _timer.stop();
            _timerAlpha = false;
            _currentAlpha = 0;

            updatePixmap();
        }
        else
        {
            setWindowOpacity(_currentAlpha / 255.f);
        }
    }
    else
    {
        _timer.stop();
        _timer.start(33, this);

        _timerAlpha = true;
    }
}