module Spotlight
  class CustomField < ActiveRecord::Base
    serialize :configuration, Hash
    belongs_to :exhibit
    
    extend FriendlyId
    friendly_id :slug_candidates, use: [:slugged,:scoped,:finders], scope: :exhibit
    
    scope :vocab, -> { where(field_type: "vocab") }

    before_save do
      self.field ||= field_name
      self.field_type ||= "text"
    end

    before_save do
      if persisted? and field_type_changed?
        old_field = self.field
        self.field = field_name

        if exhibit.blacklight_configuration.index_fields.has_key? old_field
          exhibit.blacklight_configuration.index_fields_will_change!
          f = exhibit.blacklight_configuration.index_fields.delete(old_field)
          exhibit.blacklight_configuration.index_fields[field] = f
          exhibit.blacklight_configuration.save
        end

        Spotlight::RenameSidecarFieldJob.perform_later(exhibit, old_field, self.field)
      end
    end

    def label=(label)
      configuration["label"] = label
      if (field && exhibit)
        conf = exhibit.blacklight_configuration
        if conf.index_fields.has_key? field
          conf.index_fields[field]['label'] = label
          conf.save!
        end
      end
    end

    def label
      conf = if field && exhibit && exhibit.blacklight_configuration.index_fields.has_key?(field)
        exhibit.blacklight_configuration.index_fields[field].reverse_merge(configuration)
      else
        configuration
      end

      conf['label']
    end

    def short_description=(short_description)
      configuration["short_description"] = short_description
    end

    def short_description
      configuration["short_description"]
    end

    def configured_to_display?
      if index_fields_config && index_fields_config["enabled"]
        view_types.any? do |view|
          index_fields_config[view.to_s]
        end
      end
    end

    protected
    def field_name
      "#{Spotlight::Engine.config.solr_fields.prefix}exhibit_#{self.exhibit.to_param}_#{configuration["label"].parameterize}#{field_suffix}"
    end

    def field_suffix
      case field_type
      when 'vocab'
        Spotlight::Engine.config.solr_fields.string_suffix
      else
        Spotlight::Engine.config.solr_fields.text_suffix    
      end
    end

    def view_types
      [:show] + exhibit.blacklight_configuration.blacklight_config.view.keys
    end

    def index_fields_config
      exhibit.blacklight_configuration.blacklight_config[:index_fields][field]
    end

    def should_generate_new_friendly_id?
      true
    end  
    # Try building a slug based on the following fields in
    # increasing order of specificity.
    def slug_candidates
      [
        :label,
        :field
      ]
    end

  end
end