from dataclasses import dataclass
from enum import Enum, auto


class RoomKind(Enum):
    # Wet rooms
    OPEN_KITCHEN = auto()
    KITCHEN = auto()
    TOILET = auto()
    OTHER_WET = auto()

    # dry rooms
    LIVING_ROOM = auto()
    OTHER_DRY = auto()


# https://belglas.com/wp-content/uploads/2016/04/ventilatiedocumentresidentieel.pdf
_RANGES = {
    RoomKind.OPEN_KITCHEN: (75, float("inf")),
    RoomKind.KITCHEN: (50, 75),
    RoomKind.TOILET: (25, 25),
    RoomKind.OTHER_WET: (50, 75),
    RoomKind.LIVING_ROOM: (75, 150),
    RoomKind.OTHER_DRY: (25, 72),
}


def _clamp(x, low, high):
    return min(max(x, low), high)


@dataclass
class Room:
    kind: RoomKind
    area: float

    @property
    def is_wet(self) -> bool:
        return self.kind not in {RoomKind.LIVING_ROOM, RoomKind.OTHER_DRY}

    @property
    def flow_rate(self) -> float:
        if self.kind == RoomKind.TOILET:
            return 25
        rate = 3.6 * self.area
        return _clamp(rate, *_RANGES[self.kind])