Calendar

def pick_a_day() -> None:
    ui.calendar(value=date.today() + timedelta(days=3))

def book_a_stay() -> None:
    today = date.today()
    ui.calendar(value=(today + timedelta(days=5), today + timedelta(days=9)),
                mode="range", min=today, color="success")

def room_bookings() -> None:
    first = date.today().replace(day=1)
    bookings = {first + timedelta(days=day): count
                for day, count in ((1, 2), (3, 5), (8, 1), (10, 7),
                                   (14, 3), (17, 4), (21, 6), (24, 2))}
    with ui.vstack(gap="xs", align="center"):
        ui.calendar(marks=bookings, weekstart=0, color="secondary")
        ui.text("Meeting room A · a dot on every booked day", color="muted",
                size="sm")

def closed_days() -> None:
    today = date.today()
    next_month = (today.replace(day=1) + timedelta(days=32)).replace(day=1)
    sundays = [today + timedelta(days=offset) for offset in range(61)
               if (today + timedelta(days=offset)).weekday() == 6]
    ui.calendar(month=next_month, min=today, max=today + timedelta(days=60),
                disabled_dates=sundays, size="lg")

def tomorrow() -> str:
    return (date.today() + timedelta(days=1)).isoformat()


class Agenda(PageState):
    day: str = field(default_factory=tomorrow)


def open_day(agenda: Agenda) -> None:
    """The clicked day is already in ``agenda``; the list re-renders."""


@refreshable(deps=[Agenda])
def day_schedule() -> None:
    day = date.fromisoformat(Agenda().day)
    with ui.vstack(gap="sm", classes="min-w-64"):
        ui.heading(f"{day:%A, %B} {day.day}", level=3, size="md")
        if day.weekday() >= 5:
            ui.text("The clinic is closed at weekends.", color="muted")
            return
        for hour, what, who in APPOINTMENTS[day.day % 3:day.day % 3 + 3]:
            with ui.hstack(gap="sm"):
                ui.badge(hour, variant="soft", size="sm", classes="font-mono")
                ui.text(what, weight="medium")
                ui.text(who, color="muted", size="sm")


def clinic_agenda() -> None:
    with ui.hstack(gap="xl", align="start", wrap=True):
        ui.calendar(value=Agenda().day, on_change=open_day)
        day_schedule()