module CheckAnswersHelper
  def get_answered_questions_total(subsection_pages, case_log)
    questions = subsection_pages.values.flat_map do |page|
      page["questions"].keys
    end
    questions.count { |question| case_log[question].present? }
  end

  def get_total_number_of_questions(subsection_pages)
    questions = subsection_pages.values.flat_map do |page|
      page["questions"].keys
    end
    questions.count
  end

  def create_update_answer_link(case_log_answer, case_log_id, page)
    link_name = case_log_answer.blank? ? "Answer" : "Change"
    link_to(link_name, "/case_logs/#{case_log_id}/#{page}", class: "govuk-link").html_safe
  end

  def create_next_missing_question_link(case_log_id, subsection_pages, case_log)
    pages_to_fill_in = []
    subsection_pages.each do |page_title, page_info|
      page_info["questions"].any? { |question| case_log[question].blank? }
      pages_to_fill_in << page_title
    end
    url = "/case_logs/#{case_log_id}/#{pages_to_fill_in.first}"
    link_to("Answer the missing questions", url, class: "govuk-link").html_safe
  end

  def display_answered_questions_summary(subsection_pages, case_log)
    if get_answered_questions_total(subsection_pages, case_log) == get_total_number_of_questions(subsection_pages)
      '<p class="govuk-body govuk-!-margin-bottom-7">You answered all the questions</p>'.html_safe
    else
      "<p class=\"govuk-body govuk-!-margin-bottom-7\">You answered #{get_answered_questions_total(subsection_pages, case_log)} of #{get_total_number_of_questions(subsection_pages)} questions</p>
      #{create_next_missing_question_link(case_log['id'], subsection_pages, case_log)}".html_safe
    end
  end
end