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.schema import UserExportSchema, UserCreateSchema
from cookie_api.util import ExtJSONResponse


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 email confirmation to registration
# def register(user_data: UserCreateSchema, session: Session, mail: Mail):
def register(user_data: UserCreateSchema, session: Session) -> UserExportSchema:
    email_check = session.query(User).filter_by(email=user_data['email']).one_or_none()

    if email_check is not None:
        error = {
            'status': 'error',
            'message': 'user email address is already in use'
        }
        return ExtJSONResponse(error, 400)

    user = User(email=user_data['email'], password=user_data['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',
        'data': UserExportSchema(user)
    }
    return ExtJSONResponse(message, 201)


def user_profile(user: JWTUser, session: Session) -> UserExportSchema:
    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(UserExportSchema(user))


# 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)]