# coding:utf-8
import textwrap

from PyQt5.QtCore import Qt, pyqtSignal, QPropertyAnimation, QEasingCurve, QAbstractAnimation
from PyQt5.QtWidgets import (QDialog, QGraphicsDropShadowEffect,
                             QGraphicsOpacityEffect, QLabel, QPushButton,
                             QWidget)


class MaskDialog(QDialog):

    yesSignal = pyqtSignal()
    cancelSignal = pyqtSignal()

    def __init__(self, title: str, content: str, parent):
        super().__init__(parent=parent)
        self.content = content
        self.windowMask = QWidget(self)
        self.widget = QWidget(self)
        self.titleLabel = QLabel(title, self.widget)
        self.contentLabel = QLabel(content, self.widget)
        self.yesButton = QPushButton('确定', self.widget)
        self.cancelButton = QPushButton('取消', self.widget)
        self.__initWidget()

    def __initWidget(self):
        """ 初始化小部件 """
        self.__setShadowEffect()
        self.widget.setWindowOpacity(0.1)
        self.setWindowFlags(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_TranslucentBackground)
        self.setGeometry(0, 0, self.parent().width(), self.parent().height())
        self.windowMask.resize(self.size())
        self.widget.setMaximumWidth(675)
        self.titleLabel.move(30, 30)
        self.contentLabel.move(30, 70)
        self.contentLabel.setText('\n'.join(textwrap.wrap(self.content, 36)))
        # 设置层叠样式
        self.__setQss()
        # 调节内部对话框大小并居中
        self.__initLayout()
        # 信号连接到槽
        self.yesButton.clicked.connect(self.__onYesButtonClicked)
        self.cancelButton.clicked.connect(self.__onCancelButtonClicked)

    def __setShadowEffect(self):
        """ 添加阴影 """
        shadowEffect = QGraphicsDropShadowEffect(self.widget)
        shadowEffect.setBlurRadius(50)
        shadowEffect.setOffset(0, 5)
        self.widget.setGraphicsEffect(shadowEffect)

    def showEvent(self, e):
        """ 淡入 """
        opacityEffect = QGraphicsOpacityEffect(self)
        self.setGraphicsEffect(opacityEffect)
        opacityAni = QPropertyAnimation(opacityEffect, b'opacity', self)
        opacityAni.setStartValue(0)
        opacityAni.setEndValue(1)
        opacityAni.setDuration(200)
        opacityAni.setEasingCurve(QEasingCurve.InSine)
        opacityAni.finished.connect(opacityEffect.deleteLater)
        opacityAni.start()
        super().showEvent(e)

    def closeEvent(self, e):
        """ 淡出 """
        self.widget.setGraphicsEffect(None)
        opacityEffect = QGraphicsOpacityEffect(self)
        self.setGraphicsEffect(opacityEffect)
        opacityAni = QPropertyAnimation(opacityEffect, b'opacity', self)
        opacityAni.setStartValue(1)
        opacityAni.setEndValue(0)
        opacityAni.setDuration(100)
        opacityAni.setEasingCurve(QEasingCurve.OutCubic)
        opacityAni.finished.connect(self.deleteLater)
        opacityAni.start()
        e.ignore()

    def __initLayout(self):
        """ 初始化布局 """
        self.contentLabel.adjustSize()
        self.widget.setFixedSize(60+self.contentLabel.width(),
                                 self.contentLabel.y() + self.contentLabel.height()+115)
        self.widget.move(self.width()//2 - self.widget.width()//2,
                         self.height()//2 - self.widget.height()//2)
        self.yesButton.resize((self.widget.width() - 68) // 2, 40)
        self.cancelButton.resize(self.yesButton.width(), 40)
        self.yesButton.move(30, self.widget.height()-70)
        self.cancelButton.move(
            self.widget.width()-30-self.cancelButton.width(), self.widget.height()-70)

    def __onCancelButtonClicked(self):
        self.cancelSignal.emit()
        self.close()

    def __onYesButtonClicked(self):
        self.yesSignal.emit()
        self.close()

    def __setQss(self):
        """ 设置层叠样式 """
        self.windowMask.setObjectName('windowMask')
        self.titleLabel.setObjectName('titleLabel')
        self.contentLabel.setObjectName('contentLabel')
        with open('resource/mask_dialog.qss', encoding='utf-8') as f:
            self.setStyleSheet(f.read())