namespace :new_ui do

  # :category_name is optional, depends on the naming of the category model: if no conventional, specify it
  task :migrate_categories, [:app_key, :model_name, :category_name] => :environment do |t, args|
    @db = Mongoid.database
    if args[:app_key] && args[:model_name]
      migrate_category(args[:app_key], args[:model_name], args[:category_name])
    else
      module_apps = [ %w(announcement bulletin),
                      %w(archive archive_file),
                      %w(ask ask_question ask),
                      %w(asset asset),
                      %w(faq qa),
                      %w(gallery gallery_album gallery),
                      %w(personal_book writing_book),
                      %w(personal_conference writing_conference),
                      %w(personal_experience experience),
                      %w(personal_honor honor),
                      %w(personal_journal writing_journal),
                      %w(personal_patent writing_patent),
                      %w(personal_project project),
                      %w(web_resource web_link)
                    ]
      module_apps.each{|value_array| migrate_category(value_array[0], value_array[1], value_array[2])}
    end
  end

  def migrate_category(app_key, model_name, category_name=nil)
    category_name = model_name unless category_name
    # # coll_cat = @db["#{category_name}_categories"]
    # # categories = coll_cat.find if coll_cat
    module_app = ModuleApp.where(key: app_key)[0]
    if module_app.has_category
      categories = "#{category_name}_categories".classify.constantize.admin_manager_all rescue nil
      categories = "#{category_name}_categories".classify.constantize.all if categories.blank?
      categories.each do |category|
        new_category = module_app.categories.build
        new_category.title_translations = category['title']
        new_category.disable = category['disable']
        new_category.save
        model_name.classify.constantize.where("#{category_name}_category_id" => category['_id']).each do |object|
          if object.id.is_a?(String)
            object.destroy
          else
            object.category = new_category.id
            object.remove_attribute("#{category_name}_category_id")
            object.save
          end
        end
        if object_auths = ObjectAuth.where(obj_authable_type: "#{category_name.classify}Category")
          object_auths.each do |object_auth|
            case object_auth.title
            when 'fact_check'
              new_object_auth = new_category.get_object_auth_by_title("approval_#{module_app.key}")
            else
              new_object_auth = new_category.get_object_auth_by_title("category_#{module_app.key}")
            end
            object_auth.auth_users.each do |user|
              new_object_auth.add_user_to_privilege_list(user)
            end
            object_auth.destroy
          end
        end
        category.destroy
      end
    end
  end

  task :migrate_tags => :environment do
    tags = Tag.where(_type: 'Tag')
    tags.each do |tag|
      module_app = ModuleApp.find(tag.module_tag_id)
      new_tag = module_app.module_tags.build
      new_tag.name_translations = tag['name']
      new_tag.is_default = tag['is_default']
      new_tag.save
      n_tag = new_tag.tag
      n_tag.cloud_view_count = tag['cloud_view_count']
      n_tag.view_count = tag['view_count']
      n_tag.save
      tag.taggings.each do |tagging|
        tagging.taggable.taggings.create(tag_id: n_tag.id)
      end
      tag.destroy
    end
  end

  task :change_auth_naming => :environment do
    ObjectAuth.where(title: /submit_/).each do |auth|
      auth.update_attribute(:title, auth.title.gsub('submit_', 'category_'))
    end
  end

  task :reset_user_position => :environment do
    User.where(email: /guest/).each{|d|d.update_attribute(:position, nil)}
    User.not_guest_user.each_with_index do |user, i|
      user.update_attribute(:position, i)
    end
  end

end