#include "lts_image_editor.h"

#include <QBrush>
#include <QEvent>
#include <QPaintEvent>
#include <QPainter>
#include <QPen>
#include <QRect>

using namespace LtsWidgets;

LtsImageEditor::LtsImageEditor(QWidget* parent)
    : QWidget(parent), m_isHovered(false), m_menuEnabled(true), m_bDrawOuterRect(true)
{
}

void LtsImageEditor::setPixmap(const QPixmap& pixmap)
{
    if (pixmap.isNull())
        m_pixmap = QPixmap(QStringLiteral(":style/noimage.png"));
    else
        m_pixmap = pixmap;

    update();
    emit imageChanged();
}

void LtsImageEditor::enterEvent(QEnterEvent*)
{

    m_isHovered = true;
    update();
}

void LtsImageEditor::leaveEvent(QEvent*)
{

    m_isHovered = false;
    update();
}

bool LtsImageEditor::event(QEvent* event)
{
    if (event->type() == QEvent::MouseButtonPress && m_menuEnabled)
    {
        emit signalClicked();
        event->accept();
        m_isHovered = false;
        update();
        return true;
    }

    return QWidget::event(event);
}

void LtsImageEditor::paintEvent(QPaintEvent* event)
{
    QPainter p(this);

    p.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
    QBrush brush = QColor(QStringLiteral("white"));

    if (!m_pixmap.isNull())
    {
        if (!(m_isHovered && m_menuEnabled))
        {
            const QSize s(size());
            const QPixmap pixmap(m_pixmap.scaled(s, Qt::KeepAspectRatio, Qt::SmoothTransformation));
            const int x = qRound((s.width() - pixmap.width()) / 2.);
            const int y = qRound((s.height() - pixmap.height()) / 2.);
            if (m_bDrawOuterRect)
            {
                p.setPen(QPen(QColor("gray"), 2));
                p.drawRect(rect());
            }
            p.drawPixmap(x, y, pixmap);
            event->accept();
            return;
        }
    }

    p.setPen(QPen(QColor("gray"), 2));
    p.setBrush(brush);
    p.drawRect(rect());

    if (m_isHovered && m_menuEnabled)
    {
        p.setPen(QPen(QColor(QStringLiteral("gray")), (size().height() / 48 * 2)));

        double xc = size().width() / 2.012;
        double yc = size().height() / 2.012;

        p.drawLine(QPointF(xc - (xc / 2.01f), yc - (yc / 3.01f)), QPointF(xc + (xc / 2.02f), yc - (yc / 3.02f)));
        p.drawLine(QPointF(xc - (xc / 2.01f), yc - 0.01f), QPointF(xc + (xc / 2.02f), yc - 0));
        p.drawLine(QPointF(xc - (xc / 2.01f), yc + (yc / 3.01f)), QPointF(xc + (xc / 2.02f), yc + (yc / 3.02f)));
    }

    event->accept();
}