// a dedicated server: the host from server/host.ts on a port, saving the world when it's stopped
import { type Host, start_host } from "./host.ts";

const PORT = Number(Deno.env.get("PORT") ?? 8000);

let host: Host;
try {
	host = start_host({
		build_dir: Deno.env.get("BUILD_DIR") ?? "build",
		server_mods_dir: Deno.env.get("SERVER_MODS_DIR") ?? "server_mods",
		root: ".",
		world_file: Deno.env.get("WORLD_FILE") ?? "world.json",
		seed: Deno.env.get("SEED"),
		on_fatal(message) {
			console.error(message);
			Deno.exit(1);
		},
	});
} catch (e) {
	console.error((e as Error).message);
	Deno.exit(1);
}

async function shutdown() {
	try {
		await host.shutdown();
		Deno.exit(0);
	} catch (e) {
		console.error((e as Error).message);
		Deno.exit(1);
	}
}
Deno.addSignalListener("SIGINT", shutdown);
if (Deno.build.os !== "windows") {
	Deno.addSignalListener("SIGTERM", shutdown);
}

Deno.serve(
	{ port: PORT, onListen: ({ port }) => console.log(`bworld server on http://localhost:${port}/`) },
	host.handle,
);