#include "CoordinateZWidget.h"

#include <QTimer>
#include <QPainter>

#include "utilities/ScanProcessSequence.h"

namespace
{
    const int ANIME_RECT_HEIGHT = 350;
    const int ANIME_SPEED = 10;
    const int BLINK_FREQUENCY = 18;
    const int WIDGET_WIDTH = 630;
    const int WIDGET_HEIGHT = 690;
    const int TOP_POINT_Y = 170;
    const int BOTTOM_POINT_Y = 515;
}

CoordinateZWidget::CoordinateZWidget(QWidget* aParent)
    : QWidget(aParent)
    , mTimer(new QTimer(this))
    , mRenderStartPoint(WIDGET_HEIGHT - 50)
    , mRenderEndPoint(mRenderStartPoint+ANIME_RECT_HEIGHT)
    , mRenderDirectionUp(true)
    , mRenderDirectionNumber(1)
    , mBlinking(false)
    , mBlinkFrequency(0)
    , mBlinkPoint(QPointF())
    , mStopGradientEnd(0.1)
{
    setFixedSize(WIDGET_WIDTH,WIDGET_HEIGHT);
    connect(ScanProcessSequence::getInstance(), &ScanProcessSequence::startAutoLocate, this, &CoordinateZWidget::startFlash);
    connect(ScanProcessSequence::getInstance(), &ScanProcessSequence::stopAutoLocate, this, &CoordinateZWidget::stopFlash);
    connect(ScanProcessSequence::getInstance(), &ScanProcessSequence::quitAutoLocate, this, &CoordinateZWidget::quit);
    connect(ScanProcessSequence::getInstance(), &ScanProcessSequence::autoLocateZUpdated, this, &CoordinateZWidget::setBlinkPoint);
    hide();
}

void CoordinateZWidget::paintEvent(QPaintEvent* aEvent)
{
    Q_UNUSED(aEvent);
    QPainter p(this);
    int w = this->width() - 10;
    int h = this->height();

    QRect rect(5,-175,w,h);
    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);
    //p.fillRect(0,0,w,h, lineGrad);

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

    QPointF coor = QPointF(this->rect().center().x() + 20, TOP_POINT_Y + mBlinkPoint.y());
    int raidLength = 7;
    if (mBlinking)
    {
        QRadialGradient radialGradient(coor,raidLength, coor + QPointF(0,0));
        radialGradient.setColorAt(0, QColor(0, 224, 255, 255));
        radialGradient.setColorAt(0.2, QColor(0, 224, 255, 255));
        radialGradient.setColorAt(1, QColor(0, 224, 255, 0));
        p.setBrush(radialGradient);
    }
    else
    {
        QRadialGradient radialGradient(coor,raidLength, coor + QPointF(0,0));
        radialGradient.setColorAt(0, QColor(0, 224, 255, 100));
        radialGradient.setColorAt(0.3, QColor(0, 224, 255, 100));
        radialGradient.setColorAt(1, QColor(0, 224, 255, 0));
        p.setBrush(radialGradient);
    }
    p.setPen(Qt::NoPen);
    p.drawEllipse(coor, raidLength, raidLength);

    pen.setWidth(1);
    p.setPen(pen);
    p.drawLine(w/2,TOP_POINT_Y,w/2,BOTTOM_POINT_Y);
    int samllLineWidth = 5;
    for(int i=TOP_POINT_Y; i<BOTTOM_POINT_Y; i+=5)
    {
        if((i-TOP_POINT_Y)%25!=0)
        p.drawLine(w/2,i,w/2+samllLineWidth,i);
    }

    samllLineWidth = 12;
    for(int i=TOP_POINT_Y; i<BOTTOM_POINT_Y; i+=25)
    {
        p.drawLine(w/2,i,w/2+samllLineWidth,i);
    }

    pen.setWidth(2);
    pen.setColor(QColor(0, 224, 255, 255).lighter());
    pen.setStyle(Qt::SolidLine);
    p.setPen(pen);

    samllLineWidth = 25;
    p.drawLine(w/2,TOP_POINT_Y + 25*6,w/2+samllLineWidth,TOP_POINT_Y + 25*6);
    p.drawLine(w/2,TOP_POINT_Y + 25*9,w/2+samllLineWidth,TOP_POINT_Y + 25*9);
}

void CoordinateZWidget::setBlinkPoint(int aZ)
{
    mBlinkPoint.setY(aZ);
}

void CoordinateZWidget::startFlash()
{
//    show();
//    connect(mTimer,&QTimer::timeout,this, &CoordinateZWidget::updateFlash);
//    mStopGradientEnd = 1;
//    mTimer->start(20);
}

void CoordinateZWidget::stopFlash()
{
//    disconnect(mTimer,&QTimer::timeout,this, &CoordinateZWidget::updateFlash);
//    connect(mTimer,&QTimer::timeout,this, &CoordinateZWidget::updateStopFlash);
//    mTimer->stop();
//    mTimer->start(20);
}

void CoordinateZWidget::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;
    mBlinkFrequency++;
    if( mBlinkFrequency == BLINK_FREQUENCY)
    {
        mBlinking = !mBlinking;
        mBlinkFrequency = 0;
    }

    this->update();
}
void CoordinateZWidget::updateStopFlash()
{
    mBlinking = true;
    if(mStopGradientEnd <=0.2)
    {
        mTimer->stop();
        disconnect(mTimer,&QTimer::timeout,this, &CoordinateZWidget::updateStopFlash);
        mStopGradientEnd = 0.1;
        this->update();
        return;
    }
    mStopGradientEnd-=0.02;

    this->update();
}

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