import urllib.request
import json
import sys
from pyotp import TOTP
from tabulate import tabulate

UNGLEICH_PAY_SERVER_URL = "https://pay.ungleich.ch"


class ungleichPay(object):
    def __init__(self, parser, parents):
        self.parser = parser

        self.parser['customers-list'] = self.parser['sub'].add_parser(
            'customers-list',
            help="List customers who have an active VM at ungleich",
            parents=[parents])
        self.parser['customers-list'].add_argument('--username', required=True)
        self.parser['customers-list'].add_argument('--realm', required=True)
        self.parser['customers-list'].add_argument(
            '--seed', required=True,
            help="A valid seed obtained from ungleich"
        )
        self.parser['customers-list'].add_argument(
            '--email', required=True,
            help="Email associated with the username"
        )
        self.parser['customers-list'].add_argument(
            '--ungleich-pay-server', required=False,
            help="A valid ungleich pay server url"
        )
        self.parser['customers-list'].set_defaults(func=self.customers_list)

    def customers_list(self, args):
        customers_list_endpoint = "/customers-list/"
        if args.ungleich_pay_server:
            request_url = args.ungleich_pay_server + customers_list_endpoint
        else:
            request_url = UNGLEICH_PAY_SERVER_URL + customers_list_endpoint
        print(f"request_url={request_url}")
        req = urllib.request.Request(url=request_url,
                                     method='GET',
                                     headers={
                                         "email": args.email,
                                         "username": args.username,
                                         "realm": args.realm,
                                         "token": TOTP(args.seed).now(),
                                         "Accept": "application/json"
                                     })
        try:
            response = urllib.request.urlopen(req)
        except urllib.error.HTTPError as err:
            print(str(err))
            sys.exit(1)
        except urllib.error.URLError as uerr:
            print(str(uerr))
            sys.exit(2)
        response_json = json.loads(response.read().decode('utf-8'))
        if (response_json['response'] == 'success'):
            data = response_json["data"]
            rows = [(x['email'], x['vm_count']) for x in data]
            headers = ["customer", "vm_count"]
            print("---")
            print(tabulate(rows, headers))
            print("---")
            vm_count = 0
            for x in data:
                vm_count += x['vm_count']
            print("Total vm_count = {}".format(vm_count))
        else:
            print("An error occurred.")
            print(response_json["message"])