/*
	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 { SelectProtocolSchema, validateSchema } from "@spacebar/schemas";
import { VoiceOPCodes, VoicePayload, WebRtcWebSocket, mediaServer, Send } from "@spacebar/webrtc";

export async function onSelectProtocol(this: WebRtcWebSocket, payload: VoicePayload) {
    if (!this.webRtcClient) return;

    const data = validateSchema("SelectProtocolSchema", payload.d) as SelectProtocolSchema;

    // UDP protocol not currently supported. Maybe in the future?
    if (data.protocol !== "webrtc") return this.close(4000, "only webrtc protocol supported currently");

    const response = await mediaServer.onOffer(this.webRtcClient, data.sdp!, data.codecs ?? []);

    await Send(this, {
        op: VoiceOPCodes.SESSION_DESCRIPTION,
        d: {
            video_codec: response.selectedVideoCodec,
            sdp: response.sdp,
            media_session_id: this.session_id,
            audio_codec: "opus",
        },
    });
}