#include "cdate.h"

#include <QHBoxLayout>
#include <QPainter>
#include <QEvent>
#include <QDebug>
#include <QMouseEvent>
#include <QEventLoop>

#include "calendarwidgetex.h"
#include "oneshadow.h"

CDate::CDate(const QDate& defaultDate,QWidget *parent,PopupType type) :
    QWidget{parent},
    m_parent(parent),
    m_type(type)
{
    init(defaultDate);
}

CDate::CDate(QWidget *parent,PopupType type) :
    QWidget{parent},
    m_parent(parent),
    m_type(type)
{
//    if(type == Popup)
//    {
//        setWindowFlags(Qt::FramelessWindowHint | Qt::Popup);
//    }
    init(QDate::currentDate());
}

/* 阻塞执行 */
QDate CDate::execShow()
{
    this->show();
    QEventLoop loop;
    connect(this, &CDate::signal_close, &loop, &QEventLoop::quit);
    loop.exec();
    return m_date;
}

/* 设置日期 */
void CDate::setDate(const QDate& date)
{
    m_date = date;
    m_calendarEx->setSelectedDate(date);
}


void CDate::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.drawImage(QPoint(0,0),m_shadow->image());
}
/**
 * @brief 在这里实现点击空白处隐藏或者关闭自身
 * @param watched
 * @param event
 * @return
 */
bool CDate::eventFilter(QObject *watched, QEvent *event)
{
    auto me = dynamic_cast<QMouseEvent*>(event);
    if(nullptr != me)
    {
        if(me->type() == QEvent::MouseButtonPress)
        {
            if(m_type == Popup)
            {
                /* 先将自身区域和鼠标坐标都转换成全局坐标 */
                QPoint gTopLeft = this->mapToGlobal(this->rect().topLeft());
                QRect gRect(gTopLeft.x(),gTopLeft.y(),this->width(),this->height());
                /* 判断此时的鼠标坐标是否在这个控件中 */
                if(!gRect.contains(me->globalPos()))
                {
//                    qDebug() << QTime::currentTime() << "CDate关闭了";
                    emit signal_DateChanged(m_date);
                    /* 发送信号，关闭自身 */
                    emit signal_close();
                    this->close();
                }
            }
        }
    }

    return QWidget::eventFilter(watched,event);
}


void CDate::init(const QDate &defaultDate)
{
    /* 设置无边框 */
    setWindowFlags(Qt::FramelessWindowHint);
    /* 设置底层样式表，让最底层的透明 */
    this->setAttribute(Qt::WA_TranslucentBackground);
    /* 将父类的事件注册给自己 */
    if(m_type == Popup && m_parent != nullptr)
    {
        m_parent->installEventFilter(this);
    }
    /* 设置布局，通过设置layout的Margin距离显示阴影 */
    QHBoxLayout* layout = new QHBoxLayout(this);
    this->setLayout(layout);
    layout->setMargin(RADIUS);
    this->resize(CALENDAR_WIDTH + RADIUS*2,CALENDAR_HEIGHT + RADIUS*2);

    /* 设置日历组件 */
    m_calendarEx = new CalendarWidgetEx(this);
    m_calendarEx->resize(CALENDAR_WIDTH,CALENDAR_HEIGHT);
    m_calendarEx->setCurrentPage(defaultDate.year(),defaultDate.month());
    m_calendarEx->setSelectedDate(defaultDate);
    layout->addWidget(m_calendarEx);


    /* 设置自身时间 */
    m_date = defaultDate;

    /* 设置阴影 */
    m_shadow = new OneShadow(QSize(m_calendarEx->width(),m_calendarEx->height()),RADIUS);


    /* 信号和槽 */
    connect(m_calendarEx,&CalendarWidgetEx::clicked,this,[this](const QDate& date){
        m_date = date;
        emit signal_DateChanged(date);
        emit signal_close();
        this->close();
    });
}