use std::error::Error;
use std::fmt;

use command_runner::CommandRunner;
use symbols::Symbol;

pub struct ReloadService<'a> {
  service: &'a str,
  command_runner: &'a CommandRunner
}

impl<'a> ReloadService<'a> {
  pub fn new(service: &'a str, command_runner: &'a CommandRunner) -> Self {
    ReloadService {
      service: service,
      command_runner: command_runner
    }
  }
}

impl<'a> Symbol for ReloadService<'a> {
  fn target_reached(&self) -> Result<bool, Box<Error>> {
    Ok(true)
  }

  fn execute(&self) -> Result<(), Box<Error>> {
    try!(self.command_runner.run_with_args("systemctl", &["reload-or-restart", self.service]));
    Ok(())
  }
}

impl<'a> fmt::Display for ReloadService<'a> {
  fn fmt(&self, f: &mut fmt::Formatter) -> Result<(),fmt::Error>{
    write!(f, "Reload service {}", self.service)
  }
}