#####################################
#									#
#		Tip Caluclator Mk. II       #
#		   Nicholas Savory 			#
#									#
#####################################

# Tip amount variables (15%, 18%, 20%)
tip_15 = 0.15
tip_18 = 0.18
tip_20 = 0.20

# Introductions
print("Welcome to the Tip Calculator by Nicholas Savory!\n")

# Prompt for tip amount
bill = input("What was the cost of your meal? $")
meal = float(bill.strip('$'))

# Quit if program hits exception (meal <= 0)
if meal <= 0:
	print("You must enter an amount over zero(0)! Please try again.")
	quit()

else:
	tip = int(input("Which tip percentage would you like to give today? 15% (1), 18% (2), or 20%(3)? "))

# Tip calculations + output
if tip == 1:
	tip_amount = meal * tip_15
	total = meal + meal * tip_15
	print("You tipped $%.2f for a total cost of $%.2f.\n" % (tip_amount, total))

elif tip == 2:
	tip_amount = meal * tip_18
	total = meal + meal * tip_18
	print("You tipped $%.2f for a total cost of $%.2f.\n" % (tip_amount, total))

elif tip == 3:
	tip_amount = meal* tip_20
	total = meal + meal * tip_20
	print("You tipped $%.2f for a total cost of $%.2f.\n" % (tip_amount, total))

else:
	print("You didn't pick a correct value. Please try again.")

# Closing statement if tip is processed. Quit otherwise.
if tip <= 3:
	print("Thank you for your business! This calculator was made by Nicholas Savory on 1/06/2017!")

else:
	quit()

# Survey time!
score = int(input("How would you rate it on a scale of 1-10? "))

# Response based on rating
if score >= 8:
	print("Happy to see you enjoyed it!")

elif score >= 6:
	print("We will improve it!")

else:
	print("I'm sorry for your bad experience!")

# Store the latest rating
with open("Rating.txt", "a") as text_file:
    print("Rating: {}".format(score), file=text_file)