import { AudioCodec, MediaContainer, VideoCodec } from "./types";

export function decodePath(path: string) {
	return path
		.split("/")
		.map((segment) => decodeURIComponent(segment))
		.join("/");
}

export function encodePath(path: string) {
	return path
		.split("/")
		.map((segment) => encodeURIComponent(segment))
		.join("/");
}

//IMPORTANT: needs to be kept in sync with the backend ffmpeg parameters
export function createRFC6381String(container: MediaContainer, videoCodec: VideoCodec, audioCodec: AudioCodec): string {
	let mimeType = "";
	switch (container) {
		case MediaContainer.mp4:
			mimeType = "video/mp4";
			break;
		case MediaContainer.webm:
			mimeType = "video/webm";
			break;
		case MediaContainer.mp3:
			mimeType = "audio/mpeg";
			break;
		case MediaContainer.ogg:
			mimeType = "audio/ogg";
			break;
		default:
			throw new Error(`Unsupported container: ${container}`);
	}
	mimeType += '; codecs="';

	//TODO: use correct level values
	switch (videoCodec) {
		case VideoCodec.none:
			break;
		case VideoCodec.av1:
			mimeType += "av01.0.17M.08, "; // Main profile, level 6.1, Main tier, 8bit
			break;
		case VideoCodec.h264:
			mimeType += "avc1.64003d, "; // High Profile (profile number + constraint flags), level 6.1
			break;
		case VideoCodec.h265:
			mimeType += "hev1.1.1.L183, "; // Main profile, Main tier, level 6.1
			break;
		case VideoCodec.vp9:
			mimeType += "vp09.00.61.08, "; //4:2:0, level 6.1, 8bit
			break;
		default:
			throw new Error(`Unsupported video codec: ${videoCodec}`);
	}

	switch (audioCodec) {
		case AudioCodec.opus:
			mimeType += "opus";
			break;
		case AudioCodec.aac:
			mimeType += "aac";
			break;
		case AudioCodec.vorbis:
			mimeType += "vorbis";
			break;
		case AudioCodec.mp3:
			mimeType += "mp3";
			break;
		default:
			throw new Error(`Unsupported audio codec: ${audioCodec}`);
	}
	mimeType += '"';
	return mimeType;
}