use crate::KitchenSinkErr;
use ctrlc;
use std::process;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Once;

static STOPPED: AtomicUsize = AtomicUsize::new(0);
static INIT: Once = Once::new();

pub fn dont_hijack_ctrlc() {
    INIT.call_once(|| {});
}

pub fn stop() {
    let stops = STOPPED.fetch_add(1, Ordering::SeqCst);
    if stops > 1 {
        eprintln!("STOPPING");
        if stops > 3 {
            process::exit(1);
        }
    }
}

pub fn stopped() -> bool {
    INIT.call_once(|| {
        ctrlc::set_handler(stop)
        .expect("Error setting Ctrl-C handler");
    });
    STOPPED.load(Ordering::Relaxed) > 0
}

#[inline]
pub fn running() -> Result<(), KitchenSinkErr> {
    if !stopped() {
        Ok(())
    } else {
        Err(KitchenSinkErr::Stopped)
    }
}