#! /usr/bin/env python3

import sys
import os
import argparse
import getpass

from xenu_nntp.config import Config
from xenu_nntp.db     import Database
from xenu_nntp.user   import User
from xenu_nntp.passwd import crypt

parser = argparse.ArgumentParser(description='Set password of account')
parser.add_argument('--config-file', '-f', type=str,            help='Specify a configuration file location')
parser.add_argument('username',            type=str,            help='Username of account')

args = parser.parse_args()

config = Config.load(args.config_file)
db     = Database.from_config(config)

user = db.get(User, {'username': args.username})

if user is None:
    print(f"{sys.argv[0]}: unknown user '{args.username}'", file=sys.stderr)
    exit(1)

attempts_total = 3
attempts_left  = attempts_total

while attempts_left > 0:
    attempts_left -= 1

    password_1 = getpass.getpass()

    if password_1 == '':
        continue

    password_2 = getpass.getpass('Enter password again: ')

    if password_1 != password_2:
        continue

    user.password = crypt(password_2)

    try:
        db.update(user)
        db.commit()
    except Exception as e:
        print(f"Unable to change password for user '{args.username}': {e}")
        exit(1)

    print(f"Password changed successfully for user '{args.username}'.")
    exit(0)

if attempts_left == 0:
    print(f"Failed to change password for user '{args.username}' after {attempts_total} attempts.", file=sys.stderr)
    exit(1)