use std::{io::IsTerminal, sync::LazyLock};

static IS_STDERR_TERMINAL: LazyLock<bool> = LazyLock::new(|| std::io::stderr().is_terminal());

const ARROW: &str = "==>";

fn emit(color: &str, action: &str, details: &str) {
    if *IS_STDERR_TERMINAL {
        eprintln!("\x1b[{color}m{ARROW} \x1b[1m{action} \x1b[0m{details}");
    } else {
        eprintln!("{ARROW} {action} {details}");
    }
}

pub fn step(action: &str, details: &str) {
    emit("1;34", action, details);
}

pub fn skip(action: &str, details: &str) {
    emit("1;33", action, details);
}

#[allow(dead_code)]
pub fn info(action: &str, details: &str) {
    emit("1;32", action, details);
}