# frozen_string_literal: true
class Course::Video::TopicsController < Course::Video::Controller
  load_and_authorize_resource :topic, through: :video, class: 'Course::Video::Topic'

  include Course::Discussion::PostsConcern
  skip_load_and_authorize_resource :post, except: :create

  def index
    @topics = @video.topics.includes(posts: :children).order(:timestamp)
    @topics = @topics.reject { |topic| topic.posts.empty? }
    @posts = @topics.map(&:posts).reduce(Course::Discussion::Post.none, :+)
  end

  def create
    result = @topic.class.transaction do
      raise ActiveRecord::Rollback unless @post.save && create_topic_subscription && update_topic_pending_status
      raise ActiveRecord::Rollback unless @topic.save

      true
    end

    head :bad_request unless result
  end

  def show
  end

  private

  def topic_params
    params.permit(:timestamp, :video_id)
  end

  def discussion_topic
    @topic.try(:discussion_topic)
  end

  def create_topic_subscription
    @topic.ensure_subscribed_by(current_user)
  end

  def current_tab
    @tab ||= @video.tab
  end
end
