from app import app
from data import model

import argparse

def renameUser(username, new_name):
  if username == new_name:
    raise Exception('Must give a new username')

  check = model.user.get_user_or_org(new_name)
  if check is not None:
    raise Exception('New username %s already exists' % new_name)

  existing = model.user.get_user_or_org(username)
  if existing is None:
    raise Exception('Username %s does not exist' % username)

  print 'Renaming user...'
  model.user.change_username(existing.id, new_name)
  print 'Rename complete'


parser = argparse.ArgumentParser(description='Rename a user')
parser.add_argument('username', help='The current username')
parser.add_argument('new_name', help='The new username')
args = parser.parse_args()
renameUser(args.username, args.new_name)