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from optparse import make_option
from random import choice
from string import digits, lowercase, uppercase
from uuid import uuid4

from django.core.management.base import BaseCommand, CommandError

from astakos.im.models import AstakosUser


def generate_password():
    pool = lowercase + uppercase + digits
    return ''.join(choice(pool) for i in range(10))


class Command(BaseCommand):
    args = "<email> <first name> <last name> <affiliation>"
    help = "Modify a user's attributes"
    
    option_list = BaseCommand.option_list + (
        make_option('--active',
            action='store_true',
            dest='active',
            default=False,
            help="Activate user"),
        make_option('--admin',
            action='store_true',
            dest='admin',
            default=False,
            help="Give user admin rights"),
        make_option('--password',
            dest='password',
            metavar='PASSWORD',
            help="Set user's password")
        )
    
    def handle(self, *args, **options):
        if len(args) != 4:
            raise CommandError("Invalid number of arguments")
        
        args = [a.decode('utf8') for a in args]
        email, first, last, affiliation = args
        
        username =  uuid4().hex[:30]
        password = options.get('password')
        if password is None:
            password = generate_password()
        
        user = AstakosUser(username=username, first_name=first, last_name=last,
                           email=email, affiliation=affiliation,
                           provider='local')
        user.set_password(password)
        user.renew_token()
        
        if options['active']:
            user.is_active = True
        if options['admin']:
            user.is_admin = True
        
        user.save()
        
        msg = "Created user id %d" % (user.id,)
        if options['password'] is None:
            msg += " with password '%s'" % (password,)
        self.stdout.write(msg + '\n')