/*
	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 { CLOSECODES, setHeartbeat } from "@spacebar/gateway";
import { IncomingMessage } from "http";
import { URL } from "url";
import WS from "ws";
import { VoiceOPCodes, WebRtcWebSocket, Send } from "../util";
import { onClose } from "./Close";
import { onMessage } from "./Message";

// TODO: check rate limit
// TODO: specify rate limit in config
// TODO: check msg max size

export async function Connection(this: WS.Server, socket: WebRtcWebSocket, request: IncomingMessage) {
    try {
        socket.on("close", onClose.bind(socket));
        socket.on("message", onMessage.bind(socket));
        console.log("[WebRTC] new connection", request.url);

        if (process.env.WS_LOGEVENTS) {
            [
                "close",
                "error",
                "upgrade",
                //"message",
                "open",
                "ping",
                "pong",
                "unexpected-response",
            ].forEach((x) => {
                socket.on(x, (y) => console.log("[WebRTC]", x, y));
            });
        }

        const { searchParams } = new URL(`http://localhost${request.url}`);

        socket.encoding = "json";
        socket.version = Number(searchParams.get("v")) || 5;
        if (socket.version < 3) return socket.close(CLOSECODES.Unknown_error, "invalid version");

        setHeartbeat(socket);

        socket.readyTimeout = setTimeout(() => {
            return socket.close(CLOSECODES.Session_timed_out);
        }, 1000 * 30);

        await Send(socket, {
            op: VoiceOPCodes.HELLO,
            d: {
                heartbeat_interval: 1000 * 30,
            },
        });
    } catch (error) {
        console.error("[WebRTC]", error);
        return socket.close(CLOSECODES.Unknown_error);
    }
}