#
# Lab 8
#
# Computer Science 111
#

def display_menu():
    """ prints a menu of options
    """  
    print()
    print('0) Input new goal lists')
    print('1) Get the latest score')
    print('2) Find the max number of goals')
    print('3) Print the results')
    
    ## Add any new menu options here.


    print('5) Quit')
    print()

def latest_score(terriers, opponents):
    """ returns the score of the latest (i.e., most recent) game
        inputs: terriers - a list of goals scored by the Terriers in a 
                  set of games
                opponents - a list of goals scored by their opponents
        We assume that both lists contain the same number of integers,
        and that they each contain at least one integer.
    """
    score = str(terriers[-1]) + '-' + str(opponents[-1])
    return score

def find_max_goals(goals):
    """ returns the largest number of goals in the specified 
        list of goals, which we assume contains at least one integer
    """
    maxg = goals[0]
    
    for g in goals:
        if g > maxg:
            maxg = g

    return maxg

## Add your helper functions for the remaining options below.
            

def main():
    """ the main user-interaction loop
    """
    terriers = []
    opponents = []

    while True:
        display_menu()
        choice = int(input('Enter your choice: '))

        if choice == 0:
            terriers = eval(input('Enter the Terriers list of goals: '))
            opponents = eval(input('Enter their opponents list of goals: '))
            if len(terriers) != len(opponents):
                print('The lists must have the same length.')
                print('Please select menu option 0 to try again.')
                terriers = []
                opponents = []
        elif choice == 5:
            break
        elif choice < 5 and len(terriers) == 0:
            print('You need to first enter the goal lists.')
            print('Please select menu option 0 to do so.')
        elif choice == 1:
            score = latest_score(terriers, opponents)
            print('The score of the latest game was', score)
        ## add code to process the other choices here


        else:
            print('Invalid choice. Please try again.')

    print('Goodbye!')