import string

from untitled import content, model


def validate_cat_name(name):
    ALLOWED = set(string.ascii_letters + string.digits)
    if len(name) < 4 or len(name) > 24:
        return "Your cat's name must be 4-24 characters long."

    if not all(c in ALLOWED for c in name):
        return "Your cat's name can only have letters and numbers."
    if not any(c in string.ascii_letters for c in name):
        return "Your cat's name needs at least 1 letter."


def validate_auto_gen_cat_name(name):
    if len(name) < 4 or len(name) > 9:
        return "Your cat's name must be greater than 3 characters and below 9 characters long."
    if not any(c in "aeiou" for c in name.lower()):
        return "Your cat's name must contain a vowel."


def _clamp(value, low=0, high=100):
    if value < low:
        return low
    if value > high:
        return high
    return value


def reconcile(cat: model.Cat, now):
    elapsed_hours = (now - cat.last_updated) / 3600
    if elapsed_hours <= 0:
        return
    cat.fullness -= content.HUNGER_DECAY_PER_HOUR * elapsed_hours
    cat.fullness = _clamp(cat.fullness)

    cat.happiness -= content.BASE_HAPPINESS_DECAY_PER_HOUR * elapsed_hours
    if cat.fullness < content.HUNGER_SADNESS_THRESHOLD:
        cat.happiness -= content.HUNGER_SADNESS_PENALTY_PER_HOUR * elapsed_hours
    cat.happiness = _clamp(cat.happiness)

    cat.last_updated = now


def feed(cat, amount=100):
    cat.fullness += amount
    cat.fullness = _clamp(cat.fullness)


def excite(cat, amount=100):
    cat.happiness += amount
    cat.happiness = _clamp(cat.happiness)