# Functions
def make_statement(statement, decoration):
    """Emphasises headings by adding decoration
    at the start and end"""

    print(f"{decoration * 3} {statement} {decoration * 3}")


def string_check(question, valid_answers=('yes', 'no'), num_letters=1):
    """Checks that users enter the full word
    or the 'n' letter/s of a word from a list of valid responses"""

    while True:

        response = input(question).lower()

        for item in valid_answers:

            # check if the response is th entire word
            if response == item:
                return item

            elif response == item[:num_letters]:
                return item

        print(f"Please choose an option from {valid_answers}")


def instructions():
    make_statement("Instructions", "ℹ")

    print('''
    
For each ticket holder enter ... 
- Their name
- Their age
- The payment method (cash/credit)

The program will record the ticket sale and calculate the 
ticket cost (and the profit).

Once you have either sold all of the tickets or entered the 
exit code ('xxx'), the program will display the ticket 
sales information and write the data to a text file.

It will also choose one lucky ticket holder who wins the 
draw (their ticket is free).

    ''')


def not_blank(question):
    """Checks that a user response is not blank"""

    while True:
        response = input(question)

        if response != "":
            return response

        print("Sorry, this can't be blank. Please try again.\n")


def int_check(question):
    """Checks users enter an integer / float that is more than
    zero (or the optional exit code)"""

    error = "Oops - please enter an integer more than zero."

    while True:

        try:
            # Return the response if it's an integer
            response = int(input(question))

            return response

        except ValueError:
            print(error)


# Main Routine

# Initialise ticket numbers
MAX_TICKETS = 5
tickets_sold = 0

# initialise variables / non-default options for string checker
payment_ans = ('cash', 'credit')

make_statement("Mini-Movie Fundraiser Program", "🍿")

print()
want_instructions = string_check("Do you want to see the instructions? ")

if want_instructions == "yes":
    instructions()

print()

while tickets_sold < MAX_TICKETS:
    # ask user for name (check it's not blank)
    print()
    name = not_blank("Name: ")

    # if name is exit code, break out of loop
    if name == "xxx":
        break

    # ask for age and check it's between 12 and 120
    age = int_check("Age: ")

    # Output error / success message
    if age < 12:
        print("Sorry, you are too young for this movie")
        continue
    elif age > 120:
        print(f"{name} is too old")
        continue
    else:
        pass

    # ask user for payment method (cash / credit / ca / cr)
    pay_method = string_check("Payment method: ", payment_ans, 2)
    print(f"{name} has bought a ticket ({pay_method})")

    tickets_sold += 1

if tickets_sold == MAX_TICKETS:
    print(f"You have sold all the tickets (ie: {MAX_TICKETS} tickets")
else:
    print(f"You have sold {tickets_sold} / {MAX_TICKETS} tickets.")