class NpsClient
  def self.current
    @current ||= new
  end

  def parks(offset: 0)
    conn.get('parks', { start: offset })
  end

  def alerts(state:, offset: 0)
    conn.get('alerts', { stateCode: state, start: offset })
  end

  private

  def conn
    @conn ||= Faraday.new(
      url: 'https://developer.nps.gov/api/v1',
      headers: { 'X-Api-Key': ENV.fetch('NPS_API_KEY') }
    ) do |builder|
      builder.response :json
      builder.response :raise_error
    end
  end
end