class OptionalItemQuery < ApplicationQuery
  attr_reader :params

  def initialize(params)
    @params = params
  end

  def call
    items = ItemBank.all
    if params[:tag_discipline_id].present? && params[:sub_discipline_id].present?
      items = items.joins(:tag_discipline_containers).where(tag_discipline_containers: {tag_discipline_id: params[:tag_discipline_id]})
      hacks = Hack.joins(:tag_discipline_containers).where(tag_discipline_containers: {tag_discipline_id: params[:tag_discipline_id]})
    elsif params[:sub_discipline_id].present?
      items = items.where(sub_discipline_id: params[:sub_discipline_id])
      hacks = Hack.where(sub_discipline_id: params[:sub_discipline_id])
    end

    # 来源
    source = params[:source].present? ? params[:source].to_i : 1
    public = source == 3 ? [0, 1] : source
    items = items.where(public: public)

    # 难度
    difficulty = params[:difficulty] ? params[:difficulty].to_i : 1
    items = items.where(difficulty: difficulty)
    single_question_count = items.select{ |item| item.item_type == "SINGLE" }.size
    multiple_question_count = items.select{ |item| item.item_type == "MULTIPLE" }.size
    judgement_question_count = items.select{ |item| item.item_type == "JUDGMENT" }.size
    program_question_count = hacks.present? ? hacks.pluck(:item_bank_id).reject(&:blank?).size : items.select{ |item| item.item_type == "PROGRAM" }.size
    {single_question_count: single_question_count, multiple_question_count: multiple_question_count, judgement_question_count: judgement_question_count, program_question_count: program_question_count}
  end
end