from urllib.parse import urlencode

import structlog
from flask import current_app, redirect, session
from werkzeug import Response

from delphi_slz_admin.const import APP_NAME
from delphi_slz_admin.services.config import Config

logger = structlog.get_logger(APP_NAME)


def login() -> Response:
    logger.debug('Redirecting for authorization')
    config: Config = current_app.config['CONFIG']
    return current_app.auth0.authorize_redirect(redirect_uri=f'{config.app_base_url}/callback')


def callback() -> Response:
    current_app.auth0.authorize_access_token()
    resp = current_app.auth0.get('userinfo')

    userinfo = resp.json()
    logger.debug('User info received, updating session: %s', userinfo)

    session['jwt_payload'] = userinfo
    session['profile'] = {
        'user_id': userinfo['sub'],
        'name': userinfo['name'],
        'picture': userinfo['picture']
    }

    return redirect('/')


def logout() -> Response:
    user_id = session.get('profile', {}).get('user_id')
    logger.debug('Clearing session and redirecting for logout: user_id = %s', user_id)

    session.clear()

    config: Config = current_app.config['CONFIG']
    params = {
        'returnTo': f'{config.app_base_url}/',
        'client_id': current_app.auth0.client_id,
    }

    return redirect(f'{current_app.auth0.api_base_url}/v2/logout?{urlencode(params)}')