# contract: event1: void -> void
#        purpose: is to ask the user for a ticket price, and
#        determine and print to the screen how many performances 
#        it would take to get to 500 attendees at that ticket price

#        example: if when you run event1() you enter a
#                 ticket price of 5, then the following 
#                 should be printed to the screen:
# It will take 5 performances to get to at least 500 attendees

#        if whe  you run event1() you enter a ticket price of 7,
#        then the following should be printed to the screen:

# You'll never get there! Negative attendance!


from profit_ex import *

DESIRED_ATT_TOTAL = 500

def event1():
    
    # get desired ticket price from user

    ticket_price = float( raw_input("What is the desired ticket price? "))

    # initialize needed variables
    # num_performances, total_attendees

    num_performances = 0
    total_attendees = 0

    # find out how many attendees per performance at
    #    this ticket price

    attendees_per_perf = attendance(ticket_price)

    # determine how many performances it take

    if (attendees_per_perf <= 0):
        print "You'll never get there! Negative attendance!"

    else:
        while total_attendees < DESIRED_ATT_TOTAL:
 
            num_performances = num_performances + 1

            total_attendees = total_attendees + attendees_per_perf
         

        # print out the final num_performances

        print ("It will take " + str(num_performances) + 
           " performances to get to at least " +
           str(DESIRED_ATT_TOTAL) + " attendees")