# Functions go here
def make_statement(statement, decoration):
    """Emphasises headings by adding decoration at the start and
    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 the entire word
            if response == item:
                return item

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

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


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

    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"""

    error = "Oops - please enter an integer."

    while True:
        response = input(question).lower()

        # check for the exit code
        if response == "xxx":
            return response

        try:
            # Change the response to an integer and check that its more than zero
            response = int(response)

            if response > 0:
                return response
            else:
                print(error)

        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 instructions? ")

if want_instructions == "yes":
    instructions()

print()
while tickets_sold < MAX_TICKETS:
    print()
    name = not_blank("Name: ")

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

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

    # Output error message / success message
    if age < 12:
        print("Sorry your 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 brought 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.")