def main():
  while True:
    print "*******Welcome to the MACRONUTRIENT CALCULATOR********"
    calorie_deficit = float(input("Enter your calorie deficit: "))
    Percent_protein = float(input("Percentage of Protein: "))
    Percent_carb = float(input("Percent of Carbohydrates: "))
    Percent_fat = float(input("Percentage of Fats: "))
    Macro_dict = {'Protein': Percent_protein, 'Carbohydrate': Percent_carb, 'Fats': Percent_fat}
    Macro_sum = Percent_protein + Percent_carb + Percent_fat

    if not Total_Macro_Check(Macro_sum):
      continue
    Macro_percentage_to_calorie(calorie_deficit, Percent_protein, Percent_carb, Percent_fat)

    while True:
      answer = str(input("Are you done using the calculator?(y/n): "))
      if not ask_to_leave(answer):
        break
      else:
         continue

def Total_Macro_Check(total_val):
  if total_val > 100:
    print "Total percentages surpassed 100! Please reenter percentages."
    return False
  if total_val < 100:
    print "Total precentages is less than 100! Please reenter precentages."
    return False
  return True

def Macro_percentage_to_calorie(calorie, protein, carb, fat):
  """ calories in 1 gram of P/C/F """
  cal_in_protein = 4
  cal_in_fat = 9
  cal_in_carb = 4

  """ multiple percentages with calories """
  mult_protein = protein/100.0
  mult_fat = fat/100.0
  mult_carb = carb/100.0

  calories_of_protein = calorie*mult_protein
  grams_of_protein = calories_of_protein/cal_in_protein
  print "You must eat " + str(calories_of_protein) + " calories of protein which is equivalent to " + str(grams_of_protein) + " grams of protein."

  calories_of_fat = calorie*mult_fat
  grams_of_fat = calories_of_fat/cal_in_fat
  print "You must eat " + str(calories_of_fat) + " calories of fat which is equivalent to " + str(grams_of_fat) + " grams of fat."

  calories_of_carb = calorie*mult_carb
  grams_of_carb = calories_of_carb/cal_in_fat
  print "You must eat " + str(calories_of_carb) + " calories of carbohydrates which is equivalent to " + str(grams_of_carb) + " grams of carbohydrates."

def ask_to_leave():
  if answer == 'y':
    return False
  elif answer == 'n':
    return True

if __name__ == "__main__":
	main()