#include "ZFlashWidget.h"

#include <QTimer>
#include <QPainter>

#include "utilities/ScanProcessSequence.h"

namespace
{
    const int ANIME_RECT_HEIGHT = 350;
    const int ANIME_SPEED = 10;
    const int RENFER_START_POINT = 640;
    const int TOP_POINT_Y = 0;
    const int BOTTOM_POINT_Y = 395;
}

ZFlashWidget::ZFlashWidget(QWidget* aParent)
    : QWidget(aParent)
    , mTimer(new QTimer(this))
    , mRenderStartPoint(RENFER_START_POINT)
    , mRenderEndPoint(mRenderStartPoint+ANIME_RECT_HEIGHT)
    , mRenderDirectionUp(true)
    , mRenderDirectionNumber(1)
    , mStopGradientEnd(1)
    , mMinRadius(0)
{
    //setFixedSize(WIDGET_WIDTH,WIDGET_HEIGHT);
    hide();
}

void ZFlashWidget::resizeEvent(QResizeEvent* aEvent)
{
    mMinRadius = qMin(width(), height()) / 2;
    QWidget::resizeEvent(aEvent);
}

void ZFlashWidget::paintEvent(QPaintEvent* aEvent)
{
    Q_UNUSED(aEvent);
    QPainter p(this);

    p.translate(width() / 2, height() / 4);
    QRect rect(-mMinRadius, -mMinRadius, mMinRadius * 2 - 60, mMinRadius * 2);
    p.setRenderHint(QPainter::Antialiasing,true);
    QLinearGradient  lineGrad(QPointF(0, mRenderStartPoint), QPointF(0, mRenderEndPoint));
    lineGrad.setColorAt(0,QColor(0,0,0,255));
    lineGrad.setColorAt(0.1,QColor(0,170,255,255));
    lineGrad.setColorAt(mStopGradientEnd,QColor(0,0,0,255));
    lineGrad.setColorAt(1,QColor(0,0,0,255));
    lineGrad.setSpread(QGradient::PadSpread);
    p.setBrush(lineGrad);

    QPen pen;
    pen.setWidth(3);
    pen.setColor(Qt::gray);
    pen.setStyle(Qt::SolidLine);
    p.setPen(pen);
    p.drawPie(rect, 180*16, 180*16);
}

void ZFlashWidget::startFlash()
{
    show();
    connect(mTimer,&QTimer::timeout,this, &ZFlashWidget::updateFlash);
    mTimer->start(20);
}

void ZFlashWidget::stopFlash()
{
    mTimer->stop();
    disconnect(mTimer,&QTimer::timeout,this, &ZFlashWidget::updateFlash);
    hide();
}

void ZFlashWidget::updateFlash()
{
    if(mRenderEndPoint <= TOP_POINT_Y && mRenderDirectionUp)
    {
        mRenderDirectionUp = false;
        mRenderDirectionNumber *= -1;
        mRenderStartPoint = mRenderDirectionNumber * ANIME_SPEED + TOP_POINT_Y;
    }

    if(mRenderEndPoint >= BOTTOM_POINT_Y && !mRenderDirectionUp)
    {
        mRenderDirectionUp = true;
        mRenderDirectionNumber *= -1;
        mRenderStartPoint = BOTTOM_POINT_Y - ANIME_SPEED;
    }

    mRenderStartPoint -= mRenderDirectionNumber*ANIME_SPEED;
    mRenderEndPoint = mRenderStartPoint + mRenderDirectionNumber*ANIME_RECT_HEIGHT;
    this->update();
}


void ZFlashWidget::quit()
{
    disconnect(mTimer,&QTimer::timeout,this, &ZFlashWidget::updateFlash);
    mTimer->stop();
    hide();
}