# 学生加入课堂时创建相关任务作品
class CourseAddStudentCreateWorksJob < ApplicationJob
  queue_as :course_member

  def perform(course_id, student_ids)
    course = Course.find_by(id: course_id)
    return if course.blank?

    # 如果之前存在相关作品，则更新is_delete字段
    student_works = StudentWork.joins(:homework_common).where(user_id: student_ids, homework_commons: {course_id: course.id})
    student_works.update_all(is_delete: 0)

    exercise_users = ExerciseUser.joins(:exercise).where(user_id: student_ids, exercises: {course_id: course.id})
    exercise_users.update_all(is_delete: 0)

    poll_users = PollUser.joins(:poll).where(user_id: student_ids, polls: {course_id: course.id})
    poll_users.update_all(is_delete: 0)

    graduation_works = course.graduation_works.where(user_id: student_ids)
    graduation_works.update_all(is_delete: 0)

    attrs = %i[homework_common_id user_id created_at updated_at]

    StudentWork.bulk_insert(*attrs) do |worker|
      student_ids.each do |teacher|
        worker.add same_attrs.merge(user_id: teacher.user_id)
      end
    end
  end
end