from PySide6.QtWidgets import QApplication, QWidget, QLabel, QPushButton, QVBoxLayout, QFrame
from PySide6.QtCore import QTimer, Qt, Signal
import sys
import random

from qfluentwidgets import DisplayLabel

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.label = DisplayLabel("", self)
        self.label.setAlignment(Qt.AlignCenter)

        self.layout = QVBoxLayout()
        self.layout.addWidget(self.label)
        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)
        self.label.setText(self.items[self.current_index].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