import datetime as dt

from apistar import Component, Settings, http, Route, Include
from apistar.backends.sqlalchemy_backend import Session
from apistar_jwt.authentication import get_jwt
from apistar_jwt.token import JWT
from apistar_mail import Message, Mail
from sqlalchemy.exc import IntegrityError, InvalidRequestError


from cookie_api.models import User

auth_components = [
    Component(JWT, init=get_jwt)
]


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

    user = session.query(User).filter_by(email=user_id).one()
    if not user.check_password(password):
        error = {'error': 'Password auth failed'},
        return http.Response(error, status=401, headers={'WWW-Authenticate': 'Bearer'})

    secret = settings['JWT'].get('SECRET')

    payload = {
        'exp': dt.datetime.utcnow() + dt.timedelta(days=0, minutes=60),
        'iat': dt.datetime.utcnow(),
        'sub': user.id
    }

    token = JWT.encode(payload, secret=secret)

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

    return data


# TODO Add user logout
def logout():
    pass


# TODO Add user registration
def register(json_data: http.RequestData, session: Session, mail:Mail):
    user_id = json_data.get('email')
    password = json_data.get('password')

    email_check = session.query(User).filter_by(email=user_id).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_id, password=password)

    session.add(user)
    session.commit()

    msg = Message("Thank you for registering please confirm your email", recipients=[user_id])
    mail.send(msg)

    headers = {}
    message = {
        'status': 'success',
        'message': 'Please check your inbox and confirm your email'
    }
    return http.Response(message, status=200, headers=headers)


# TODO Add user profile endpoint
def user_profile():
    pass


# 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)
]

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