from util import hook
import random


@hook.command(autohelp=False)
def coin(inp, me=None):
    "coin [amount] -- Flips [amount] of coins."

    try:
        amount = int(inp)
    except ValueError:
        return "Invalid input!"

    if amount == 1:
        if getrandbits(1):
            me("flips a coin and gets heads.")
        else:
            me("flips a coin and gets tails.")
        me("flips a coin and gets %s." % random.choice(["heads", "tails"]))
    elif amount == 0:
        me("makes a coin flipping motion with its hands.")
    else:
        heads = int(random.normalvariate(.5 * amount, (.75 * amount) ** .5))
        tails = amount - heads
        me("flips %i coins and gets " \
        "%i heads and %i tails." % (amount, heads, tails))