defmodule SecCompanyFilingsRssFeedParser.Feed do

  def parse(xml) do
    %{
      updated: parse_updated(xml),
      title: parse_title(xml),
      author_name: parse_author_name(xml),
      author_email: parse_author_email(xml),
      entries: parse_entries(xml),
      company_info: parse_company_info(xml)
    }
  end

  def extract_last_item(tuple) do
    {_, _, item} = tuple
    item |> hd
  end

  defp parse_entries(xml) do
    Floki.find(xml, "entry")
    |> Enum.map(fn entry -> SecCompanyFilingsRssFeedParser.Entry.parse(Floki.raw_html(entry)) end)
  end

  defp parse_company_info(xml) do
    xml
    |> Floki.find("company-info")
    |> Floki.raw_html
    |> SecCompanyFilingsRssFeedParser.CompanyInfo.parse
  end

  defp parse_updated(feed) do
    {_, _, [date]} =
    feed
    |> Floki.find("updated")
    |> List.last

    date
  end

  defp parse_title(feed) do
    {_, _, [title]} =
    feed |>
    Floki.find("title")
    |> List.last

    title
  end

  defp parse_author_name(feed) do
    feed |> Floki.find("author name") |> hd
    |> extract_last_item
  end

  defp parse_author_email(feed) do
    feed |> Floki.find("author email") |> hd
    |> extract_last_item
  end
end