class MediaAsset < ApplicationRecord

  @@filters = {
    query: -> (search_term) { where("name like ?", "%#{search_term}%") },
    tag_ids: -> (tag_ids) { includes(:tags).where(tags: { id: tag_ids }) },
    campaign_id: -> (campaign_id) { joins(:campaigns).where(campaigns: { id: campaign_id }).distinct },
    broadcast_date_start: -> (start_date) {where("broadcast_date >= ?", start_date.to_datetime) },
    broadcast_date_end: -> (end_date) { where("broadcast_date <= ?", end_date.to_datetime) },
    size: -> (size) { limit(size) },
    #media_type: -> (type="video") { scope_by_media_type(media_type) }
  }

  def self.search_by(search_params)
    media_type = search_params.delete(:media_type) || "video"

    filters = [scope_by_media_type(media_type)]

    search_params.each_pair do |filter_name, argument|
      filter = @@filters.fetch(filter_name, none)
      filters << filter.call(argument)
    end

    filters.reduce(:merge)
  end

end