Phonebill

# input in format hh:mm:ss,nnn-nnn-nnn

inputfile = open("phonebill.txt")

allcalls = []
maxduration = 0
maxphone=0
sumcost = 0


def calcCost(duration):
    # if the call was shorter than 5 min: 3 cents per second
    # 5 min  = 300 seconds
    if duration < 300:
        cost = 3 * duration
    # if the call was longer than 5 min: 150 cents for every started minute
    # per example, if it's exactly 5 min, it's not started the sixth
    elif duration >= 300:
        cost = (hours * 60 + minutes) * 150
        if seconds > 0:
            cost += 150
    return cost



for line in inputfile.readlines():
    inputtime = line
    if line == '\n':
        #print('Empty Line')
        continue

    #split time and phone number into list
    splitinput = inputtime.split(',')
    #save into explicit variables for readabilty
    phonenumber = splitinput[1]
    hours, minutes, seconds = [int(n) for n in splitinput[0].split(':')]
    phonelist = splitinput[1].split('-')
    phone = int(''.join(map(str,phonelist)))
    #duration in seconds
    duration = hours * 3600 + minutes * 60 + seconds

    # Phone number with longest duration is free
    # if there are multiple phone numbers with the same longest duration, select the smallest phone number
    if duration > maxduration:
        maxduration = duration
        maxphone = phone
    elif duration == maxduration:
        if maxphone > phone:
            maxphone = phone

    # add together total cost
    cost = calcCost(duration)
    sumcost += cost

    allcalls.append({"Phonenumber":phone, "Cost":cost})

    print '{} seconds. Phonenumber {}. Cost: {}. Running Total: {}'.format(duration, phone, cost, sumcost)


# deduct cost of calls to phonenumber with longest duration

sumfree = sum([call["Cost"] for call in allcalls if call["Phonenumber"]==maxphone])

sumcost -= sumfree


print 'Free Calls: {} saved. Phone number {}'.format(sumfree,maxphone)
print 'The total cost of all calls is: {}'.format(sumcost)