module TasklistHelper
  STATUSES = {
    :not_started => "Not started",
    :cannot_start_yet =>  "Cannot start yet",
    :completed => "Completed",
    :in_progress => "In progress"
  }

  STYLES = {
    :not_started => "govuk-tag--grey",
    :cannot_start_yet => "govuk-tag--grey",
    :completed => "",
    :in_progress => "govuk-tag--blue"
  }

  def get_subsection_status(subsection_name, case_log, questions)
    if subsection_name == "declaration"
      return all_questions_completed(case_log) ? :not_started : :cannot_start_yet
    end

    return :not_started if questions.all? {|question| case_log[question].blank?}
    return :completed if questions.all? {|question| case_log[question].present?}
    :in_progress
  end

  def get_status_style(status_label)
    STYLES[status_label]
  end

  def get_status_label(status)
    STATUSES[status]
  end

  def get_next_incomplete_section(form, case_log)
    subsections = form.all_subsections.keys
    return subsections.find { |subsection| is_incomplete?(subsection, case_log, form.questions_for_subsection(subsection).keys) }
  end

  def get_sections_count(form, case_log, status = :all)
    subsections = form.all_subsections.keys
    if status == :all
      return subsections.count
    end
    return subsections.count { |subsection| get_subsection_status(subsection, case_log, form.questions_for_subsection(subsection).keys) == status }
  end

  private
  def all_questions_completed(case_log)
    case_log.attributes.all? { |_question, answer| answer.present?}
  end

  def is_incomplete?(subsection, case_log, questions)
    status = get_subsection_status(subsection, case_log, questions)
    return status == :not_started || status == :in_progress
  end
end