import path from "node:path";
import commandExists from "command-exists";
import type { Metadata } from "music-server-shared/types";

export const coverRegex = process.env.COVER_REGEX === undefined ? /(cover)|(folder).(png|jpg)$/i : "";
export const musicRoot = process.env.MUSIC_ROOT || "";
export const mediaInfoDisabled = !!process.env.DISABLE_MEDIAINFO || false;
if (musicRoot === "") {
	console.error("Please define the environment variable MUSIC_ROOT");
	process.exit(1);
}

export const [username, password] = process.env.AUTH
	? Buffer.from(process.env.AUTH, "base64").toString().split(":", 2)
	: [undefined, undefined];

export const authTokens = new Map<string, Date>();

//clear outdated tokens once a day
setInterval(
	() => {
		for (const [token, endDate] of authTokens.entries()) {
			if (endDate.getTime() < Date.now()) authTokens.delete(token);
		}
	},
	1000 * 60 * 60 * 24,
);

if (!path.isAbsolute(musicRoot)) {
	console.error(`Music root ${musicRoot} is not absolute`);
	process.exit(1);
}

export const excludeExtension =
	process.env.EXCLUDE_EXTENSION === undefined
		? ["txt", "log", "nfo", "m3u", "htm", "html"]
		: process.env.EXCLUDE_EXTENSION.split(",");

if (!commandExists.sync("ffmpeg")) {
	console.error("Required command ffmpeg not found in PATH");
	process.exit(1);
}
if (!commandExists.sync("tar")) {
	console.error("Required command tar not found in PATH");
	process.exit(1);
}
if (!commandExists.sync("avifenc")) {
	console.error("Required command avifenc not found in PATH");
	process.exit(1);
}

export const mediaTypes = ["audio", "video"];
export const allowedTypes = [...mediaTypes, "image"];

export const fileTypeCache = new Map<string, string>();
export const probeCache = new Map<string, Metadata>();
export const generatedPlaylistIds = new Map<string, string[]>();

export class PathInfo {
	constructor(public mimeType: string) {}
}

export class ServerError {
	constructor(
		public status: number,
		public error: string,
	) {}
}