import { useContext, useEffect, useState } from 'react';
import { Redirect, useLocation, useParams } from 'react-router-dom';
import { API_ENDPOINT } from '../api/api';
import AuthenticationContext from './AuthenticationContext';

export default function Authenticator() {
	const { provider } = useParams<{ provider: string }>();
	const query = new URLSearchParams(useLocation().search);
	const code = query.get('code');
	const { refreshAuthState } = useContext(AuthenticationContext);
	const [status, setStatus] = useState<'pending' | 'errored' | 'authenticated'>(
		'pending'
	);

	useEffect(() => {
		fetch(`${API_ENDPOINT}/create_session`, {
			method: 'POST',
			headers: {
				'Content-Type': 'application/json',
			},
			body: JSON.stringify({
				code,
				provider,
			}),
		})
			.then((response) => {
				response.json().then((json) => {
					if (json.status === 'success') {
						localStorage.setItem('session_token', json.token);
						refreshAuthState && refreshAuthState();
						setStatus('authenticated');
					} else {
						setStatus('errored');
					}
				});
			})
			.catch(() => {
				setStatus('errored');
			});
	}, [code, provider, refreshAuthState]);

	switch (status) {
		case 'authenticated':
			return <Redirect to="/" />;
		case 'errored':
			return <h1>Sign In Error</h1>;
		case 'pending':
			return <h1>Signing In</h1>;
	}
}