import {
	MetaFunction,
	json,
	LoaderFunctionArgs,
	redirect,
	ActionFunctionArgs,
} from "@remix-run/node";
import { Form as RemixForm, Link, useActionData } from "@remix-run/react";
import Form from "react-bootstrap/Form";
import Button from "react-bootstrap/Button";
import Row from "react-bootstrap/Row";
import Col from "react-bootstrap/Col";
import { useTranslation } from "react-i18next";
import i18n from "~/i18next.server";
import serverRequest, { getToken, writeCookie } from "~/lib/request.server";
import { AuthResponse } from "~/lib/api/auth";
import { ApiError, ErrorCode } from "~/lib/api/error";
import ErrorAlert from "~/components/ErrorAlert";
import { User } from "~/lib/api/user";

export const meta: MetaFunction<typeof loader> = ({ data }) => {
	return [{ title: `${data?.meta.title || "Log in"} - pronouns.cc` }];
};

export const loader = async ({ request }: LoaderFunctionArgs) => {
	const t = await i18n.getFixedT(request);
	const token = getToken(request);
	if (token) {
		try {
			await serverRequest<User>("GET", "/users/@me", { token });

			throw redirect("/?err=already-logged-in", 303);
		} catch (e) {
			// ignore
		}
	}

	return json({
		meta: { title: t("log-in.title") },
	});
};

export const action = async ({ request }: ActionFunctionArgs) => {
	const body = await request.formData();
	const email = body.get("email") as string | null;
	const password = body.get("password") as string | null;

	console.log(email, password);

	try {
		const resp = await serverRequest<AuthResponse>("POST", "/auth/email/login", {
			body: { email, password },
		});

		return redirect("/", {
			status: 303,
			headers: {
				"Set-Cookie": writeCookie("pronounscc-token", resp.token),
			},
		});
	} catch (e) {
		return json({ error: e as ApiError });
	}
};

export default function LoginPage() {
	const { t } = useTranslation();
	const actionData = useActionData<typeof action>();

	return (
		<Row xs={1} lg="auto">
			<Col>
				<h2>{t("log-in.form-title")}</h2>
				{actionData?.error && <LoginError error={actionData.error} />}
				<RemixForm action="/auth/log-in" method="POST">
					<Form as="div">
						<Form.Group className="mb-3" controlId="email">
							<Form.Label>{t("log-in.email")}</Form.Label>
							<Form.Control name="email" type="email" required />
						</Form.Group>
						<Form.Group className="mb-3" controlId="password">
							<Form.Label>{t("log-in.password")}</Form.Label>
							<Form.Control name="password" type="password" required />
						</Form.Group>

						<Button variant="primary" type="submit">
							{t("log-in.log-in-button")}
						</Button>
						<Button as={Link} to="/auth/register">
							{t("log-in.register-with-email")}
						</Button>
					</Form>
				</RemixForm>
			</Col>
			<Col>
				<h2>{t("log-in.3rd-party-title")}</h2>
			</Col>
		</Row>
	);
}

function LoginError({ error }: { error: ApiError }) {
	const { t } = useTranslation();

	if (error.code !== ErrorCode.UserNotFound) return <ErrorAlert error={error} />;

	return <>{t("log-in.invalid-credentials")}</>;
}