# frozen_string_literal: true

require_dependency "renalware/hd/base_controller"

# The route to the edit route for this controller takes /:year/:week_number segments
# rather than an id. THat is because when we load the diary, and when we navigate back and forth
# through diaries, we are concerned with the week more then an id. Its easier to navigate to the
# next week with /2017/52 than by looking up the id of the next diary ahead of time.
module Renalware
  module HD
    class DiariesController < BaseController
      include Renalware::Concerns::PdfRenderable
      include Renalware::Concerns::Pageable

      def edit
        authorize weekly_diary, :show?
        render locals: {
          unit: unit,
          diary: DiaryPresenter.new(current_user, weekly_diary)
        }
      end

      # Renders a list of diaries for a hospital unit
      def index
        authorize WeeklyDiary, :index?
        render locals: { unit: unit, diaries: weekly_diaries }
      end

      def show
        diary = WeeklyDiary.find(params[:id])
        respond_to do |format|
          format.pdf do
            authorize diary
            options = default_pdf_options.merge!(
              pdf: pdf_filename,
              locals: { unit: unit, diary: DiaryPresenter.new(current_user, diary) }
            )
            render options
          end
        end
      end

      private

      # TODO: give a sensible name
      def pdf_filename
        "hd_unit_diary"
      end

      def weekly_diary
        @weekly_diary ||= begin
          FindOrCreateDiaryByWeekQuery.new(
            relation: WeeklyDiary.eager_load(
              slots: [:patient, :station, :diurnal_period_code],
              master_diary: { slots: [:patient, :station, :diurnal_period_code] }
            ),
            unit_id: unit_id,
            week_period: week_period,
            by: current_user
          ).call
        end
      end

      # The route segments are /:year/:week_number
      # We use a WeekPeriod value object to wrap those two things.
      def week_period
        WeekPeriod.new(
          week_number: params[:week_number],
          year: params[:year]
        )
      end

      def unit_id
        params[:unit_id]
      end

      def unit
        Hospitals::Unit.find(unit_id)
      end

      def weekly_diaries
        WeeklyDiary
          .where(hospital_unit_id: unit_id)
          .ordered
          .page(page).per(per_page)
      end
    end
  end
end