import string

from untitled import content


def validate_cat_name(name, auto_gen=False):
    ALLOWED = set(string.ascii_letters + string.digits)
    if not auto_gen:
        if len(name) < 4 or len(name) > 24:
            return "Your cat's name must be 4-24 characters long."
    else:
        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 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 reconcile(cat, now):
    elapsed_hours = (now - cat.last_updated) / 3600
    if elapsed_hours <= 0:
        return
    cat.hunger -= content.HUNGER_DECAY_PER_HOUR * elapsed_hours
    if cat.hunger < 0:
        cat.hunger = 0
    cat.last_updated = now


def feed(cat, amount=100):
    cat.hunger += amount
    if cat.hunger > 100:
        cat.hunger = 100