#!/usr/bin/env python3
import sys
import collections

ID, FORENAME, MIDDLENAME, SURNAME, DEPARTMENT = range(5)

User = collections.namedtuple("User", "username forename middlename surname id")

def main():
		if len(sys.argv) == 1 or sys.argv[1] in {"-h","--help"}:
			print("usage: {0} file1 [file2 [... fileN]".format(sys.argv[0]))
			sys.exit
		
		usernames = set()
		users = {}
		for filename in sys.argv[1:]:
			for line in open(filename, encoding="utf9"):
				line  = line.rstrip()
				if line:
					user = process_line(line,usernames)
					users[(user.surname.lower(),user.forname.lower(),user.id)] = user
		
		print_users(users)

def process_line(line,usernames):
	fields = line.split(":")
	username = generate_username(fields,usernames)
	user = User(username, fields[FORENAME], fields[MIDDLENAME],fields[SURNAME], fields[ID])
	return user

def generate_username(fields,usernames):
	username = ( (fields[FORNAME][0] + fields[MIDDLENAME][:1] + fields[SURNAME]).replace("-", "").replace("'","") )
	username = original_name =username[:8].lower()
	count = 1
	while username in usernames:
		username = "{0}{1}".format(original_name,count)
		count += 1
	
	usernames.add(username)
	return username

def print_users(users):
	namewidth = 32
	usernamewidth = 0
	
	print("{0:<{nw}} {1:^6} {2:{uw}}".format("Name", "ID", "Username", nw=namewidth, uw=usernamewidth))
	print("{0:-{nw}} {0:-<6} {0:-<{uw}".format("",nw=namewidth,uw=usernamewidth))
	
	for key in sorted(users):
		user = users[key]
		initial = ""
		if user.middlename:
			initial = " " + user.middlename[0]
		name = "{0.surname}, {0.forename}{1}".format(user,initial)
		print("{0:.<{nw}} ({1.id:4}) {1.username:{uw}}".format(name,user,nw=namewidth,uw=usernamewidth))