from typing import Tuple, Union
from mysql.connector import Error as mysqlError

import app.db.user_db as user_db
from app.models.user_model import User

import app.messages.api_responses.user_responses as response
import app.messages.api_errors as errors
from app.mail.mail import send_mail


from app.messages.mail_responses.user_email import USER_EMAIL_SUCCESSFULLY_DELETED_ACCOUNT

def delete_user(user_id: str) -> Tuple[Union[dict, str], int]:
    """
    Deletes a user account.

    :param user_id: User ID.
    :type user_id: str
    :return: Tuple containing a dictionary and an HTTP status code.
    :rtype: Tuple[Union[dict, str], int]
    """

    try:
        user: User = user_db.fetch_by_id(user_id=user_id)
        user_db.delete_user(user)
        send_mail(USER_EMAIL_SUCCESSFULLY_DELETED_ACCOUNT, user.email)
    except mysqlError as e:
        return errors.UNKNOWN_DATABASE_ERROR(e)

    return response.USER_DELETED_SUCCESSFULLY