#include "SwitchButton.h"
#include <QPainter>
#include <QPainterPath>

SwitchButton::SwitchButton(QWidget *parent) : QWidget(parent)
{
    m_space = 2;
    m_radius = 5;
    m_checked = false;
    m_showText = true;
    m_showText = false;
    m_animation = true;
//    m_bgColorOn = QColor(21, 156, 119);
    m_bgColorOn = QColor(0x4e96fb);
    m_bgColorOff = QColor(111, 122, 126);
    m_sliderColorOn = QColor(255, 255, 255);
    m_sliderColorOff = QColor(255, 255, 255);
    m_textColor = QColor(255, 255, 255);
    m_textOn = tr("Yes");
    m_textOff = tr("No");
    m_step = 0;
    m_startX = 0;
    m_endX = 0;
//    m_timer = new QTimer(this);
    m_timer = std::make_shared<QTimer>(this);
    m_timer.get()->setInterval(30);
    connect(m_timer.get(), SIGNAL(timeout()), this, SLOT(updateValue()));
}

void SwitchButton::drawBackGround(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);
    QColor bgColor = m_checked ? m_bgColorOn : m_bgColorOff;
    if (isEnabled())
    {
        bgColor.setAlpha(255);
    }
    painter->setBrush(bgColor);
    QRect rect(0, 0, width(), height());
    int side = qMin(width(), height());
    //左侧半圆
    QPainterPath path1;
    path1.addEllipse(rect.x(), rect.y(), side, side);
    //右侧半圆
    QPainterPath path2;
    path2.addEllipse(rect.width() - side, rect.y(), side, side);
    //中间的矩形
    QPainterPath path3;
    path3.addRect(rect.x() + side / 2, rect.y(), rect.width() - side, height());
    QPainterPath path = path1 + path2 + path3;
    painter->drawPath(path);
    //绘制文本
    //滑块半径
    int sliderWidth = qMin(height(), width()) - m_space * 2 - 5;
    if (m_checked)
    {
        QRect textRect(0, 0, width() - sliderWidth, height());
        painter->setPen(QPen(m_textColor));
        painter->drawText(textRect, Qt::AlignCenter, m_textOn);
    }
    else
    {
        QRect textRect(sliderWidth, 0, width() - sliderWidth, height());
        painter->setPen(QPen(m_textColor));
        painter->drawText(textRect, Qt::AlignCenter, m_textOff);
    }
    painter->restore();
}

void SwitchButton::drawSlider(QPainter *painter)
{
    painter->save();
    painter->setPen(Qt::NoPen);
    QColor color = m_checked ? m_sliderColorOn : m_sliderColorOff;
    painter->setBrush(QBrush(color));
    int sliderWidth = qMin(width(), height()) - m_space * 2;
    QRect rect(m_space + m_startX, m_space, sliderWidth, sliderWidth);
    painter->drawEllipse(rect);
    painter->restore();
}

void SwitchButton::paintEvent(QPaintEvent *)
{
    //启用反锯齿
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    //绘制背景
    drawBackGround(&painter);
    //绘制滑块
    drawSlider(&painter);
}

void SwitchButton::mousePressEvent(QMouseEvent *ev)
{
    Q_UNUSED(ev)
    m_checked = !m_checked;
    emit checkedChanged(m_checked);
    //计算步长
    m_step = width() / 10;
    //计算滑块X轴终点坐标
    if (m_checked)
    {
        m_endX = width() - height();
    }
    else
    {
        m_endX = 0;
    }
    //判断是否使用动画
    if (m_animation)
    {
        m_timer.get()->start();
    }
    else
    {
        m_startX = m_endX;
        update();
    }
}

void SwitchButton::updateValue()
{
    if (m_checked)
    {
        if (m_startX < m_endX)
        {
            m_startX += m_step;
        }
        else
        {
            m_startX = m_endX;
            m_timer.get()->stop();
        }
    }
    else
    {
        if (m_startX > m_endX)
        {
            m_startX -= m_step;
        }
        else
        {
            m_startX = m_endX;
            m_timer.get()->stop();
        }
    }
    update();
}

int SwitchButton::space() const
{
    return m_space;
}

int SwitchButton::radius() const
{
    return m_radius;
}

bool SwitchButton::checked() const
{
    return m_checked;
}

bool SwitchButton::showText() const
{
    return m_showText;
}

bool SwitchButton::showCircel() const
{
    return m_showCircle;
}

bool SwitchButton::animation() const
{
    return m_animation;
}

QColor SwitchButton::bgColorOn() const
{
    return m_bgColorOn;
}

QColor SwitchButton::bgColorOff() const
{
    return m_bgColorOff;
}

QColor SwitchButton::sliderColorOn() const
{
    return m_sliderColorOn;
}

QColor SwitchButton::sliderColorOff() const
{
    return m_sliderColorOff;
}

QColor SwitchButton::textColor() const
{
    return m_textColor;
}

QString SwitchButton::textOn() const
{
    return m_textOn;
}

QString SwitchButton::textOff() const
{
    return m_textOff;
}

int SwitchButton::step() const
{
    return m_step;
}

int SwitchButton::startX() const
{
    return m_startX;
}

int SwitchButton::endX() const
{
    return m_endX;
}

void SwitchButton::setSpace(int space)
{
    if (m_space != space)
    {
        m_space = space;
        update();
    }
}

void SwitchButton::setRadius(int radius)
{
    if (m_radius != radius)
    {
        m_radius = radius;
        update();
    }
}

void SwitchButton::setChecked(bool checked)
{
    if (m_checked != checked)
    {
        m_checked = checked;
        update();
    }
    if (m_checked)
    {
        //计算步长
        m_step = width() / 10;
        m_endX = width() - height();
        m_startX = m_endX;
        update();
    }
    else
    {
        m_endX = 0;
    }
//    //判断是否使用动画
//    if (m_animation)
//    {
//        m_timer.get()->start();
//    }
//    else
//    {
//        m_startX = m_endX;
//        update();
//    }
}

void SwitchButton::setShowText(bool show)
{
    if (m_showText != show)
    {
        m_showText = show;
        update();
    }
}

void SwitchButton::setShowCircle(bool show)
{
    if (m_showCircle != show)
    {
        m_showCircle = show;
        update();
    }
}

void SwitchButton::setAnimation(bool ok)
{
    if (m_animation != ok)
    {
        m_animation = ok;
        update();
    }
}

void SwitchButton::setBgColorOn(const QColor &color)
{
    if (m_bgColorOn != color)
    {
        m_bgColorOn = color;
        update();
    }
}

void SwitchButton::setBgColorOff(const QColor &color)
{
    if (m_bgColorOff != color)
    {
        m_bgColorOff = color;
        update();
    }
}

void SwitchButton::setSliderColorOn(const QColor &color)
{
    if (m_sliderColorOn != color)
    {
        m_sliderColorOn = color;
        update();
    }
}

void SwitchButton::setSliderColorOff(const QColor &color)
{
    if (m_sliderColorOff != color)
    {
        m_sliderColorOff = color;
        update();
    }
}

void SwitchButton::setTextColor(const QColor &color)
{
    if (m_textColor != color)
    {
        m_textColor = color;
        update();
    }
}

void SwitchButton::setTextOn(const QString &text)
{
    if (m_textOn != text)
    {
        m_textOn = text;
        update();
    }
}

void SwitchButton::setTextOff(const QString &text)
{
    if (m_textOff != text)
    {
        m_textOff = text;
        update();
    }
}

#if 0
void SwitchButton::setStep(int step)
{
    if (m_step != step)
    {
        m_step = step;
        update();
    }
}

void SwitchButton::setStartX(int startX)
{
}

void SwitchButton::setEndX(int endX)
{
}
#endif