import requests
import json
import argparse
import binascii

from pyotp import TOTP
from os.path import join as join_path
from uncloud.common.settings import settings


def get_otp_parser():
    otp_parser = argparse.ArgumentParser('otp')
    try:
        name = settings['client']['name']
        realm = settings['client']['realm']
        seed = settings['client']['seed']
    except Exception:
        otp_parser.add_argument('--name', required=True)
        otp_parser.add_argument('--realm', required=True)
        otp_parser.add_argument('--seed', required=True, type=get_token, dest='token', metavar='SEED')
    else:
        otp_parser.add_argument('--name', default=name)
        otp_parser.add_argument('--realm', default=realm)
        otp_parser.add_argument('--seed', default=seed, type=get_token, dest='token', metavar='SEED')

    return otp_parser


def load_dump_pretty(content):
    if isinstance(content, bytes):
        content = content.decode('utf-8')
    parsed = json.loads(content)
    return json.dumps(parsed, indent=4, sort_keys=True)


def make_request(*args, data=None, request_method=requests.post):
    r = request_method(join_path(settings['client']['api_server'], *args), json=data)
    try:
        print(load_dump_pretty(r.content))
    except Exception:
        print('Error occurred while getting output from api server.')


def get_token(seed):
    if seed is not None:
        try:
            token = TOTP(seed).now()
        except binascii.Error:
            raise argparse.ArgumentTypeError('Invalid seed')
        else:
            return token