from flask import Blueprint, current_app
from flask_jwt_extended import jwt_required, create_access_token
from flask_apispec import use_kwargs, marshal_with, doc
from marshmallow import fields

from api.exceptions import BadRequestException
import api.constants as constants

from .serializers import token_response_schema
blueprint = Blueprint('login', __name__)


@doc(tags=['login'])
@blueprint.route('', methods=['POST'])
@jwt_required(optional=True)
@use_kwargs({
    'username': fields.Str(required=True),
    'password': fields.Str(required=True)
})
@marshal_with(token_response_schema)
def login_user(username, password, **kwargs):
    if username == constants.API_USER and password == current_app.config[constants.API_PASS]:
        return {'token': create_access_token(identity=username, fresh=True, expires_delta=False)}
    else:
        raise BadRequestException("Wrong combination of username and password")