import sys

""" Tells you how many beers you can drink given the following criteria:

Return 2 empty beer bottles for 1 free beer.
Return 4 beer bottle caps for 1 free beer.
"""

class BeerDrinker:
    RETURNBTLS = 2
    RETURNCAPS   = 4

    def __init__(self, starting_beer):
        self.starting_beer = starting_beer
        self.beers = starting_beer
        self.bottles = 0
        self.caps = 0
        self.beers_consumed = 0
        self.recycled_caps = 0
        self.recycled_bottles = 0

    def haveone(self):
        """Drink one beer"""
        if self.beers:
            print('Drinking a beer')
            self.beers -= 1
            self.bottles += 1
            self.caps += 1
            self.beers_consumed += 1
            return True
        return False

    def recycle(self):
        if self.bottles >= self.RETURNBTLS:
            print('Recycled Bottle')
            self.bottles -= self.RETURNBTLS
            self.recycled_bottles += 1
            self.beers += 1

        if self.caps >= self.RETURNCAPS:
            print('Recycled Caps')
            self.caps -= self.RETURNCAPS
            self.recycled_caps += 1
            self.beers += 1

    def status(self):
        print('{}\nStarted with {} beers.\nYou drank {} beers.\n'
              'You recycled {} bottles and {} caps.\n'
              'You have {} bottles and {} caps left.'.format(
            '-'*50,
            self.starting_beer, self.beers_consumed,
            self.recycled_bottles, self.recycled_caps,
            self.bottles, self.caps
            ))

    def drinkem(self):
        while self.haveone(): self.recycle()
        self.status()


if __name__ == '__main__':

    if len(sys.argv) > 1:
        try:
            startingbeers = int(sys.argv[1])
        except ValueError:
            print("You're drunk %s is not a number...\nGO HOME" % sys.argv[1])
            sys.exit(1)
    else:
        print("Must pass number of beers as first argument!")
        sys.exit(1)

    if startingbeers < 0:
        print("Be positive you fool!")
        sys.exit(1)
    if startingbeers == 0:
        print("You must drink some beer!")
        sys.exit(1)

    soon_to_be_drunk_person = BeerDrinker(startingbeers)
    soon_to_be_drunk_person.drinkem()