class ExaminationBanks::SendToCourseService < ApplicationService
  attr_reader :exam, :exercise

  def initialize(exam, exercise)
    @exam = exam
    @exercise = exercise
  end

  def call
    ActiveRecord::Base.transaction do
      exercise.exercise_name = exam.name
      exercise.time = exam.duration.present? ? exam.duration : -1
      exercise.is_md = false
      exercise.save!

      exam.examination_items.each_with_index do |item, index|
        question = exercise.exercise_questions.new
        question.question_type = question_type item.item_type
        question.question_title = item.name
        question.question_number = index + 1
        question.question_score = item.score

        if item.item_type == "PROGRAM"
          new_hack = item.container.fork
          question.hack_id = new_hack.id
          question.save!
        else
          question.save!
          ExerciseQuestionAnalysis.new(analysis: item.analysis, exercise_question_id: question.id)
          item.item_choices.each_with_index do |choice, position|
            question.exercise_choices << ExerciseChoice.new(choice_text: choice.choice_text, choice_position: position+1)
            if choice.is_answer
              question.exercise_standard_answers << ExerciseStandardAnswer.new(exercise_choice_id: position+1)
            end
          end
        end
      end

      exam.increment!(:quotes)
    end
    exercise
  end

  def question_type item_type
    question_type = case item_type
                    when 'SINGLE'
                      Exercise::SINGLE
                    when 'MULTIPLE'
                      Exercise::MULTIPLE
                    when 'JUDGMENT'
                      Exercise::JUDGMENT
                    when 'COMPLETION'
                      Exercise::COMPLETION
                    when 'SUBJECTIVE'
                      Exercise::SUBJECTIVE
                    when 'PRACTICAL'
                      Exercise::PRACTICAL
                    when 'PROGRAM'
                      Exercise::PROGRAM
                    end
    question_type
  end
end