# numberwords.py
# --------------
# By MWC Contributors
# Functions to print out a verbal representation of an integer.

MAXIMUM = 1000000
DIGIT_NAMES = [
    "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"
]
TWEEN_AND_TEEN_NAMES = [
    "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"
]
TENS_NAMES = [
    "", "ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"
]

def int_under_1000000_to_str(number):       #also does 1 million just for fun!
    if number <1000:
        return int_under_1000_to_str(number)
    elif number == 1000000:
        return "one million"
    elif number < 1000000:
        thousands_prefix = divide_with_remainder(number, 1000)
        if number % 1000 == 0:
            return int_under_1000_to_str(thousands_prefix[0]) + " thousand"
        else:
            return int_under_1000_to_str(thousands_prefix[0]) + " thousand " + int_under_1000000_to_str(thousands_prefix[1])
    else: 
        return "Error, Try again, number must be 1 million or less, positive numbers only"
        
def int_under_1000_to_str(number):
    if number <100:
        return int_under_100_to_str(number)
    elif number<1000:
        hundreds_prefix = divide_with_remainder(number, 100)
        if number % 100 ==0:
            return DIGIT_NAMES[hundreds_prefix[0]] + " hundred"
        else:
            return DIGIT_NAMES[hundreds_prefix[0]] + " hundred and " + int_under_100_to_str(hundreds_prefix[1])
        

def int_under_100_to_str(number):
    if number <20:
        return int_under_20_to_str(number)
    elif number <100:
        tens_prefix = divide_with_remainder(number,10)
        if number % 10==0:
           return TENS_NAMES[tens_prefix[0]]
        else:
            return TENS_NAMES[tens_prefix[0]] + "-" +DIGIT_NAMES[tens_prefix[1]]



def int_under_20_to_str(number):
    if number <10:
        return int_under_10_to_str(number)
    elif number <20:
        return TWEEN_AND_TEEN_NAMES[number-10]
   

def int_under_10_to_str(number):
    return DIGIT_NAMES[number]

def divide_with_remainder(dividend, divisor):
    """Divides one number by another, using whole-number division. 
    Returns the quotient and the remainder. 
    """
    quotient = dividend // divisor
    remainder = dividend % divisor
    return quotient, remainder