# frozen_string_literal: true

require 'tessellator/fetcher'

class HowIs
  # This entire class is a monstrous hack, because GitHub doesn't provide
  # a good API for Pulse.
  #
  # TODO: Use GitHub's Statistics API to replace this garbage.
  #   See https://github.com/how-is/how_is/issues/122
  class Pulse
    def initialize(repository)
      @repository = repository
      @pulse_page_response = fetch_pulse!(repository)
    end

    # This is probably dead code.
    def text_summary
      raise NotImplementedError
    end

    # Gets the HTML Pulse summary.
    def html_summary
      parts =
        @pulse_page_response.body
          .split('<div class="section diffstat-summary">')

      if parts.length == 1
        return "There hasn't been any activity on #{@repository} in the last month."
      end

      parts
        .last
        .split('</div>').first
        .gsub('<a href="/', '<a href="https://github.com/')
        .strip
    end

    private

    # Fetch Pulse page from GitHub for scraping.
    def fetch_pulse!(repository)
      Tessellator::Fetcher.new.call('get', "https://github.com/#{repository}/pulse/monthly")
    end
  end
end