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use std::process::Command;

pub struct killer {
    pub port: u32,
}

impl killer {
    pub fn kill_process_by_port(&self) {
        if let Some(pid) = get_pid_by_port(&self.port) {
            println!(
                "PID of the process listening on port {}: {}",
                self.port, pid
            );
            kill_process(pid);
        } else {
            println!("No process found listening on port {}", self.port);
        }
    }
}

pub fn get_pid_by_port(port: &u32) -> Option<u32> {
    println!("port: {}", port);
    let lsof_output = Command::new("lsof")
        .arg("-t")
        .arg("-i")
        .arg(format!(":{}", port))
        .output()
        .expect("No pid found");

    println!("{:#?}", lsof_output);

    if lsof_output.stdout.is_empty() {
        return None;
    }

    let output_str = String::from_utf8_lossy(&lsof_output.stdout);
    let lines: Vec<&str> = output_str.split('\n').collect();

    Some(lines[0].parse::<u32>().unwrap())
}

pub fn kill_process(pid: u32) {
    Command::new("kill")
        .arg("-9")
        .arg(format!("{}", pid))
        .output()
        .expect("Cannot kill process");
}