import datetime as dt

from apistar import http, Route, Include

from apistar_jwt.token import JWT, JWTUser
# from apistar_mail import Message, Mail
# from sqlalchemy.exc import IntegrityError, InvalidRequestError
from sqlalchemy.orm import Session
from sqlalchemy.orm.exc import NoResultFound

from cookie_api.models import User
from cookie_api.util import ExtJSONResponse


# from cookie_api.schema import


def login(json_data: http.RequestData, session: Session, jwt: JWT):
    user_id = json_data.get('email')
    password = json_data.get('password')

    try:
        user = session.query(User).filter_by(email=user_id).one()

    except NoResultFound:
        error = {
            'status': 'fail',
            'message': 'User does not exist'
        }
        return ExtJSONResponse(error, status=400, headers={'WWW-Authenticate': 'Bearer'})

    if not user.check_password(password):
        error = {'error': 'Password auth failed'},
        return ExtJSONResponse(error, status=401, headers={'WWW-Authenticate': 'Bearer'})

    payload = {
        'exp': dt.datetime.utcnow() + dt.timedelta(days=0, minutes=60),  # Expiration date of the token
        'iat': dt.datetime.utcnow(),  # the time the token was generated
        'sub': user.id  # the subject of the token
    }

    token = jwt.encode(payload)

    data = {
        'status': 'success',
        'message': 'Successfully logged in.',
        'auth_token': token
    }

    return ExtJSONResponse(data, 200)


# TODO Add user logout
def logout():
    pass


# TODO Add user registration
# def register(user_rep: UserCreateSchema, session: Session, mail: Mail):
def register():
    # email_check = session.query(User).filter_by(email=user_rep['email']).one_or_none()
    #
    # if email_check is not None:
    #     message = {
    #         'status': 'error',
    #         'message': 'user email address is already in use'
    #     }
    #     return http.Response(message, status=400)
    #
    # user = User(email=user_rep['email'], password=user_rep['password'])
    #
    # session.add(user)
    # session.commit()
    #
    # msg = Message("Thank you for registering please confirm your email", recipients=[user_rep['email']])
    # mail.send(msg)
    #
    # headers = {}
    # message = {
    #     'status': 'success',
    #     'message': 'Please check your inbox and confirm your email'
    # }
    # return http.Response(message, status=201, headers=headers)
    pass


def user_profile(user: JWTUser, session: Session): # -> UserSchema
    try:
        user = session.query(User).filter_by(id=user.id).one()
    except NoResultFound as e:
        error = {'message': str(e)}
        return ExtJSONResponse(error, 400)
    return ExtJSONResponse(user.to_dict())


# TODO Add email confirmation
def confirm(json_data: http.RequestData, session: Session):
    pass


# TODO Add email password reset
def reset():
    pass


routes = [
    Route('/login', 'POST', login),
    # Route('/register', 'POST', register),
    Route('/status', 'GET', user_profile)
]

auth_routes = [Include('/auth', name='auth', routes=routes)]