# Functions go here
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 range of valid responses"""

    while True:

        response = input(question).lower()

        for item in valid_answers:

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

            # check if it's the 'n' letters
            elif response == item[:num_letters]:
                return item

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

def instructions():
    make_statement("Instructions",decoration="{}")

    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 profit.

Once you have either sold all 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 cant bbe blank. Please try again.\n")

def int_check(question):
    """Checks users enter an integer"""

    error = "Oops - please enter an integer"

    while True:

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

            return response

        except ValueError:
            print(error)

# main routine goes here

# 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:
    # asl user for their name ( and check its not blank)\
    print()
    name = not_blank("Name: ")

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

    # ask for their age and check its between 12 and 120
    age = int_check("Age: ")

    # Output error message / success message
    if age < 12:
        print("Sorry you are too young for this movie")
        continue

    elif age > 120:
        print("?? That looks like a typo (too old)")
        continue

    else:
        pass

    # ask user for payment method ( cash / credit)
    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")