全日历事件类

function addEvent(event) {
    const { start, end } = event;
    for (let existingEvent of calendarEvents) {
        if (start < existingEvent.end && end > existingEvent.start) {
            throw new Error("时间冲突，请选择其他时间段");
        }
    }
    calendarEvents.push(event);
}

function setReminder(event, reminderTime) {
    const { start } = event;
    const reminderDateTime = new Date(start.getTime() - reminderTime);
    setTimeout(() => {
        alert(`提醒：${event.title}`);
    }, reminderDateTime - Date.now());
}

function renderView(viewType) {
    switch (viewType) {
        case 'day':
            renderDayView();
            break;
        case 'week':
            renderWeekView();
            break;
        case 'month':
            renderMonthView();
            break;
        default:
            throw new Error("不支持的视图类型");
    }
}