# Filename: age2.py
# Author: Mark Williams
 
#Do all the module imports first
import datetime
 
#Just a Def to all up to convert strings to UPPERCASE
def to_upper(string):
    upper_case = ""
    for character in string:
        if 'a' <= character <= 'z':
            location = ord(character) - ord('a')
            new_ascii = location + ord('A')
            character = chr(new_ascii)
        upper_case = upper_case + character
    return upper_case
#End of Def here.
 
#Next we'll import the date from that module we loaded.
from datetime import date
 
#And put the date today in a variable
now = date.today()
 
#Then we'll make a seperate variable for each 'piece'
#of the date for manipulation
 
#Yeah, YEAR input now with error checking
error_var = 0
while error_var == 0:
	y = int(raw_input('Please enter the YEAR of which you were born:    '))
	if y >= 2009:
		print "Error, you're not born yet! Try again."
	elif y < 0:
		print "Error, no way we're you born BC!"
	else:
		error_var = 1
 
#Next is Month input with error checking for both integer input
#and for string input.
error_val = 0
while error_val == 0:
	m = raw_input('Please enter the MONTH of which you were born:   ')
	try:
    		dummy = int(m)
	    	#error checking on the input number (as it was given as an integer)
		m = int (m)
		if m < 1 or m > 12:
		    	print "Error? That's not a month!"
	    	else:
		    	error_val = 1
	except:
		m = to_upper(m)[:3]
		#Convert the string version to an integer version
		#Lots of "error_val..." here, might take a look at
		#removing these somehow.
		if m == "JAN":
			m = 1
		elif m == "FEB":
			m = 2
			error_val = 1
		elif m == "MAR":
			m = 3
			error_val = 1
		elif m == "APR":
			m = 4
			error_val = 1
		elif m == "MAY":
			m = 5
			error_val = 1
		elif m == "JUN":
			m = 6
			error_val = 1
		elif m == "JUL":
			m = 7
			error_val = 1
		elif m == "AUG":
			m = 8
			error_val = 1
		elif m == "SEP":
			m = 9
			error_val = 1
		elif m == "OCT":
			m = 10
			error_val = 1
		elif m == "NOV":
			m = 11
			error_val = 1
		elif m == "DEC":
			m = 12
			error_val = 1
		else:
			print "\nError, didn't get which month you meant there either \n\
enter it as an integer (1 to 12) or type the month name out, \n\
either as an abbreviation (Jan, Feb, Mar...) or in \n\
full (January, February...)\n"
 
#Day input, again with error checking
error_var = 0
while error_var == 0:
	d = int(raw_input('Please enter the DAY on which you were born:     '))
	if d < 1 or d > 32:
		print "Error, what DAY did you say?"
	else:
		error_var = 1
 
#Added here so as to not double commands
d = int(d)
m = int(m)
y = int(y)
 
#Put the input-ed date into a single variable
birthday = date(y, m, d)
#Work out the persons age
age = now - birthday
#Convert that to years (allowing for leap years too
years = age.days / 365.25
#Convert it to months also
months = age.days / 12
 
## Output the data!
print "\nToday, your are:\n\n"
print age.days, " days"
print months, " months"
print "or"
print int(years), " years old!"
 
#Now just for fun we'll play with some list stuff
#I'll try and make it look neat and 'readable' too.
a = [\
'January',\
'February',\
'March',\
'April',\
'May',\
'June',\
'July',\
'August',\
'September',\
'October',\
'November',\
'December']
#Prepare 'm' for 'a'
m = m - 1
#Add the 'st', 'nd', 'rd' or 'th' bit to the day!
if d == 1 or d == 21 or d == 31:
	d = str(d) + 'st'
elif d == 2 or d == 22 or d == 32:
	d = str(d) + 'nd'
elif d == 3 or d == 23:
	d = str(d) + 'rd'
elif d > 3 and d <= 20 or d >23 and d <= 30:
	d = str(d) + 'th'
print "\n\nAlso I can tell you that you were born on: ", d, a[m], y
#That's all folks!