/*
 * Copyright (c) 2024 DTB <trinity@trinity.moe>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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/.
 */

use std::{
	env::args,
	process::ExitCode,
	thread::sleep,
	time::Duration
};

extern crate sysexits;
use sysexits::{EX_OK, EX_USAGE};

fn usage(s: &str) -> ExitCode {
	eprintln!("Usage: {} [seconds]", s);
	ExitCode::from(EX_USAGE as u8)
}

fn main() -> ExitCode {
	let argv = args().collect::<Vec<String>>();

	if argv.len() == 2 {
		if let Ok(s) = argv[1].parse::<u64>() {
			sleep(Duration::from_secs(s));
			ExitCode::from(EX_OK as u8)
		} else {
			usage(&argv[0])
		}
	} else {
		usage(&argv[0])
	}
}