require_dependency "renalware/hd"
require_dependency "collection_presenter"

# TODO: mixing query and presenter here..
module Renalware
  module HD
    class DiarySlotPresenter < SimpleDelegator
      delegate :master?, to: :diary, allow_nil: true

      # Patients who prefer to dialyse on this day e.g. Mon and in this period e.g. AM.
      # Flag those already assigned so they cannot be chosen.
      def patients_preferring_to_dialyse_today_in_this_period
        patients = Renalware::HD::PatientsDialysingByDayAndPeriodQuery
          .new(
            diary.hospital_unit_id,
            day_of_week,
            diurnal_period_code.code
          ).call.all
        simplify(patients)
      end

      # Patients who prefer to dialyse on this day e.g. Mon
      # Flag those already assigned so they cannot be chosen.
      def patients_preferring_to_dialyse_today
        patients = Renalware::HD::PatientsDialysingByDayQuery
        .new(
          diary.hospital_unit_id,
          day_of_week
        ).call.all
        simplify(patients)
      end

      # rubocop:disable Metrics/MethodLength
      def patient_search_options
        hospital_unit = Renalware::Hospitals::Unit.find(diary.hospital_unit_id)
        [
          OpenStruct.new(
            id: :dialysing_on_day_and_period,
            name: "Dialysing #{day_of_week_name} #{diurnal_period_code.to_s.upcase}"
          ),
          OpenStruct.new(
            id: :dialysing_on_day,
            name: "Dialysing on #{day_of_week_name}"
          ),
          OpenStruct.new(
            id: :dialysing_at_unit,
            name: "All #{hospital_unit.unit_code} HD patients"
          ),
          OpenStruct.new(
            id: :dialysing_at_hospital,
            name: "All HD patients"
          )
        ]
      end

      private

      def simplify(patients)
        patients.map do |patient|
          hd_profile = patient.hd_profile
          text = "#{patient.to_s(:long)} - "\
                 "#{hd_profile&.schedule_definition} "\
                 "#{hd_profile&.hospital_unit&.unit_code}".strip.truncate(65)
          OpenStruct.new(id: patient.id, text: text)
        end
      end
    end
  end
end