/*
	Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Spacebar and Spacebar Contributors
	
	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.
	
	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { route } from "@spacebar/api";
import { ConnectionStore, emitEvent, FieldErrors } from "@spacebar/util";
import { Request, Response, Router } from "express";
import { ConnectionCallbackSchema } from "@spacebar/schemas";

const router = Router({ mergeParams: true });

router.post("/", route({ requestBody: "ConnectionCallbackSchema" }), async (req: Request, res: Response) => {
    const { connection_name } = req.params as { [key: string]: string };
    const connection = ConnectionStore.connections.get(connection_name);
    if (!connection)
        throw FieldErrors({
            provider_id: {
                code: "BASE_TYPE_CHOICES",
                message: req.t("common:field.BASE_TYPE_CHOICES", {
                    types: Array.from(ConnectionStore.connections.keys()).join(", "),
                }),
            },
        });

    if (!connection.settings.enabled)
        throw FieldErrors({
            provider_id: {
                message: "This connection has been disabled server-side.",
            },
        });

    const body = req.body as ConnectionCallbackSchema;
    const userId = connection.getUserId(body.state);
    const connectedAccnt = await connection.handleCallback(body);

    // whether we should emit a connections update event, only used when a connection doesnt already exist
    if (connectedAccnt)
        await emitEvent({
            event: "USER_CONNECTIONS_UPDATE",
            data: { ...connectedAccnt, token_data: undefined },
            user_id: userId,
        });

    res.sendStatus(204);
});

export default router;