from uuid import uuid4
from telethon.utils import get_display_name

def parse_command(text):
  text = text.strip()

  if not text.startswith('/'):
    raise ValueError

  text = text.split(' ')

  if len(text) < 1:
    raise ValueError

  command = text[0][1:].lower()

  if '@' in command:
    command = command.split('@')
    command = command[0]

  args = text[1:]
  argc = len(args)
  args_string = ' '.join(args)

  return (command, argc, args, args_string)

def get_link_to_user(user):
  full_name = get_display_name(user)
  if not full_name:
    full_name = user.username
  
  if not full_name:
    full_name = '?'

  if user.username:
    return f'[{full_name}](@{user.username})'

  return full_name

def is_valid_name(name):
  return name.isidentifier()

def make_temporary_filename(ext):
  uid = uuid4().hex

  return f'tmp_{uid}.{ext}'