#include "line.h"

Line::Line()
    : QLine()
{
    m_selected = true;
}

bool Line::isHit(const QPoint &clickPoint)
{
    QVector3D a(p2() - p1());
    QVector3D r1(p1());

    QVector3D rq(clickPoint);

    float dist = rq.distanceToLine(r1, a.normalized());

    return  dist < 5;
}

void Line::setSelected(bool selected)
{
    m_selected = selected;
}

void Line::draw(QPainter *painter)
{
    if (m_selected)
    {
        QPen penTemp(Qt::DotLine);
        penTemp.setColor(Qt::red);
        painter->setPen(penTemp);

        painter->drawEllipse(p1(), 5, 5);
        painter->drawEllipse(p2(), 5, 5);
    }
    else
    {
        QPen penNormal(Qt::SolidLine);
        penNormal.setColor(Qt::black);
        painter->setPen(penNormal);
    }

    painter->drawLine(p1(), p2());

}

void Line::move(const QPoint &oldPoint, const QPoint &newPoint)
{
    if (m_selected)
    {
        QPoint offset = newPoint - oldPoint;
        QVector3D vecOld(oldPoint);

        if (vecOld.distanceToPoint(QVector3D(p1())) < 5)
        {
            setP1(p1() + offset);
        }
        else if (vecOld.distanceToPoint(QVector3D(p2())) < 5)
        {
            setP2(p2() + offset);
        }
        else
        {
            setP1(p1() + offset);
            setP2(p2() + offset);
        }
    }
}

QDomElement Line::toDomElement(QDomDocument *doc)
{
    QDomElement e = doc->createElement(className());
    attributesToDom(doc, e);
    return e;
}

bool Line::attributesToDom(QDomDocument *doc, QDomElement &e)
{
    if (e.isNull())
    {
        qDebug() << className() << "::attributesToDom Error: NULL element passed.";
        return false;
    }
    else
    {
        e.setAttribute("x1", p1().rx());
        e.setAttribute("y1", p1().ry());
        e.setAttribute("x2", p2().rx());
        e.setAttribute("y2", p2().ry());

        return true;
    }
}

bool Line::fromDomElement(const QDomElement &e)
{
    if (e.isNull())
    {
        qDebug() << className() << "::fromQDomElement Error: NULL element passed.";
        return false;
    }

    if (className() != e.tagName())
    {
        qDebug() << className() << "::fromQDomElement Error: Invalid element type: " <<
                 e.tagName() << " instead of " << className();
        return false;
    }

    return attributesFromDom(e);
}

bool Line::attributesFromDom(const QDomElement &e)
{
    if (e.isNull())
    {
        qDebug() << className() << "::attributesFromDom Error: NULL element passed.";
        return false;
    }
    else
    {
        QPoint newP1(e.attribute("x1", "0").toInt(), e.attribute("y1", "0").toInt());
        QPoint newP2(e.attribute("x2", "0").toInt(), e.attribute("y2", "0").toInt());

        setPoints(newP1, newP2);

        return true;
    }
}

QString Line::className()
{
    return "Line";
}