import random
from typing import Union

from PySide6.QtCore import QTimer, Qt, Signal
from PySide6.QtGui import QIcon
from PySide6.QtWidgets import QWidget, QVBoxLayout, QFrame, QLayout
from qfluentwidgets import DisplayLabel, LargeTitleLabel, GroupHeaderCardWidget, FluentIconBase, CardGroupWidget

from module.picker.schema import PickerStudent


class Widget(QFrame):

    def __init__(self, key: str, parent=None):
        super().__init__(parent=parent)
        # 必须给子界面设置全局唯一的对象名
        self.setObjectName(key.replace(' ', '-'))


class RollingTextWidget(QWidget):
    finishSignal = Signal()

    def __init__(self, parent=None):
        super().__init__(parent)
        self.current_index = 0
        self.items = []

        self.soLabel = LargeTitleLabel("", self)
        self.nameLabel = DisplayLabel("", self)
        self.soLabel.setAlignment(Qt.AlignCenter)
        self.nameLabel.setAlignment(Qt.AlignCenter)

        self.layout = QVBoxLayout()
        self.layout.addWidget(self.soLabel)
        self.layout.addWidget(self.nameLabel)
        self.setLayout(self.layout)

        self.rolling_timer = QTimer(self)
        self.rolling_timer.setInterval(50)  # 滚动速度（毫秒）
        self.rolling_timer.timeout.connect(self.update_text)

        self.stop_timer = QTimer(self)
        self.stop_timer.setSingleShot(True)
        self.stop_timer.timeout.connect(self.stop_rolling)

    def update_text(self):
        # 每次显示下一个字符
        self.current_index = (self.current_index + 1) % len(self.items)
        stu = self.items[self.current_index]
        self.soLabel.setText(stu.so)
        self.nameLabel.setText(stu.name)

    def start_rolling(self):
        if not self.rolling_timer.isActive():
            self.rolling_timer.start()
            self.stop_timer.start(2000)  # 2秒后停止滚动

    def stop_rolling(self):
        self.rolling_timer.stop()
        self.finishSignal.emit()

    def set_items(self, items: list[PickerStudent]):
        self.items = items[:]
        random.shuffle(self.items)

    def show_result(self, student: PickerStudent):
        self.soLabel.setText(student.so)
        self.nameLabel.setText(student.name)

    def clear_text(self):
        self.soLabel.clear()
        self.nameLabel.clear()


class MyCardGroupWidget(CardGroupWidget):
    def addLayout(self, layout: QLayout, stretch=0):
        self.hBoxLayout.addLayout(layout, stretch=stretch)


class MyGroupHeaderCardWidget(GroupHeaderCardWidget):
    def addGroup(self, icon: Union[str, FluentIconBase, QIcon], title: str, content: str,
                 object: Union[QWidget, QLayout],
                 stretch=0) -> CardGroupWidget:
        group = MyCardGroupWidget(icon, title, content, self)

        if isinstance(object, QWidget):
            group.addWidget(object, stretch=stretch)
        elif isinstance(object, QLayout):
            group.addLayout(object, stretch=stretch)

        if self.groupWidgets:
            self.groupWidgets[-1].setSeparatorVisible(True)

        self.groupLayout.addWidget(group)
        self.groupWidgets.append(group)
        return group