# frozen_string_literal: true

module SortParams
  extend ActiveSupport::Concern

  ALLOWED_SORT_FIELDS = %i[created_at updated_at first_seen_at width height score relevance comments tag_count random wilson].freeze
  ALLOWED_SORT_DIRS   = %i[asc desc]

  def parse_sort
    sd = ALLOWED_SORT_DIRS.detect { |d| params[:sd] == d.to_s } || :desc

    return [{ 'galleries.position' => { 'order' => sd, 'nested_path' => 'galleries', 'nested_filter' => { 'term' => { 'galleries.id' => Regexp.last_match(1).to_i } } } }] if params[:sf] =~ /\Agallery_id:(\d+)\z/

    return [_random: sd, random_seed: Regexp.last_match(1).to_i] if params[:sf] =~ /\Arandom:(\d+)\z/

    sf = ALLOWED_SORT_FIELDS.detect { |f| params[:sf] == f.to_s } || :created_at

    sf = case sf
         when :relevance
           :_score
         when :comments
           :comment_count
         when :random
           :_random
         when :wilson
           :wilson_score
         else
           sf
         end

    if [:created_at, :updated_at, :_random].include?(sf)
      [sf => sd]
    else
      [{ sf => sd }, { id: :desc }]
    end
  end
end