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//
// Wildland Project
//
// Copyright © 2023 Golem Foundation
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 3 as published by
// the Free Software Foundation.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use signal_hook::consts::SIGINT;
use signal_hook::iterator::{Handle, Signals};

pub struct Ctrlc {
    handle: Handle,
}

impl Ctrlc {
    pub fn new<F>(closure: F) -> Self
    where
        F: Fn() + Send + 'static,
    {
        let mut signals = Signals::new([SIGINT]).unwrap();
        let handle = signals.handle();

        std::thread::spawn(move || {
            for signal in signals.wait() {
                match signal {
                    SIGINT => closure(),
                    _ => unreachable!(),
                }
            }
        });

        Self { handle }
    }
}

impl Drop for Ctrlc {
    fn drop(&mut self) {
        self.handle.close();
    }
}