use std::{
  fs::File,
  io::{self, BufRead, BufReader},
};

use nix::sys::utsname::UtsName;

#[must_use]
#[cfg_attr(feature = "hotpath", hotpath::measure)]
pub fn get_system_info(utsname: &UtsName) -> String {
  format!(
    "{} {} ({})",
    utsname.sysname().to_str().unwrap_or("Unknown"),
    utsname.release().to_str().unwrap_or("Unknown"),
    utsname.machine().to_str().unwrap_or("Unknown")
  )
}

#[cfg_attr(feature = "hotpath", hotpath::measure)]
pub fn get_os_pretty_name() -> Result<String, io::Error> {
  let file = File::open("/etc/os-release")?;
  let reader = BufReader::new(file);

  for line in reader.lines() {
    let line = line?;
    if let Some(pretty_name) = line.strip_prefix("PRETTY_NAME=") {
      if let Some(trimmed) = pretty_name
        .strip_prefix('"')
        .and_then(|s| s.strip_suffix('"'))
      {
        return Ok(trimmed.to_owned());
      }
      return Ok(pretty_name.to_owned());
    }
  }
  Ok("Unknown".to_owned())
}