def main():
"""
1) Get necessary parameters from the user.
2) Calculate the mixture.
3) Output the results.
"""
abv1 = decimal.Decimal(Cli.arg(*PROMPT_LIST)) # pylint: disable=star-args
abv2 = decimal.Decimal(Cli.arg(*PROMPT_LIST)) # pylint: disable=star-args
target_abv = decimal.Decimal(Cli.arg(*PROMPT_LIST)) # pylint: disable=star-args
# If it is possible to create a mixture according to the provided
# parameters,
# find and output the answer.
if (target_abv >= abv1 or target_abv >= abv2) and (target_abv <= abv1 or target_abv <= abv2):
target_vol = decimal.Decimal(Cli.arg(*PROMPT_LIST)) # pylint: disable=star-args
vol1 = target_vol * (target_abv - abv2) / (abv1 - abv2)
vol2 = target_vol - vol1
print("\nYou will need {:4.3} fl. oz. of the first ingredient ({}% ABV), and".format(vol1, abv1))
print("\t {:4.3} fl. oz. of the second ingredient ({}% ABV).\n".format(vol2, abv2))
# Otherwise, apologize to the illogical user.
else:
print("Sorry, that's not possible.") # pylint: disable=C0325
