class MpcShim
  def update()
    `mpc #{@host_arg} update`
  end

  def clear()
    `mpc #{@host_arg} clear`
  end

  def play()
    `mpc #{@host_arg} play`
  end

  def stop()
    `mpc #{@host_arg} stop`
  end

  def next()
    `mpc #{@host_arg} next`
  end

  def reset()
    `mpc #{@host_arg} clear`
    `mpc #{@host_arg} add /`
    `mpc #{@host_arg} shuffle`
    `mpc #{@host_arg} repeat`
  end

  def update()
    `mpc #{@host_arg} update`
  end

  def toggle()
    `mpc #{@host_arg} toggle`
  end

  def add(filename = nil)
    if filename == nil
      `mpc #{@host_arg} add /`
    else
      `mpc #{@host_arg} add #{filename}`
    end
    return $?.success?
  end

  def start()
    `systemctl start mpd` unless `ps aux | grep mpd` != ""
    `mpc #{@host_arg} repeat`
  end

  def running?()
    return `ps aux | grep mpd` == ""
  end

  def playing?()
    return `mpc status | grep playing` == ""
  end

  def nowplaying()
    return `mpc #{@host_arg} | head -n 1`
  end

  def initialize(hostname=:localhost)
    if hostname != :localhost
      @host_arg = "--host #{hostname} "
    end
    true
  end

end