module ActiveFedora::QueryResultBuilder

def self.class_from_solr_document(hit, opts = {})
  #Set the default starting point to the class specified, if available.
  best_model_match = Model.from_class_uri(opts[:class]) unless opts[:class].nil?
  Array(hit[HAS_MODEL_SOLR_FIELD]).each do |value|
    model_value = Model.from_class_uri(value)
    if model_value
      # Set as the first model in case opts[:class] was nil
      best_model_match ||= model_value
      # If there is an inheritance structure, use the most specific case.
      if best_model_match > model_value
        best_model_match = model_value
      end
    end
  end
  ActiveFedora::Base.logger.warn "Could not find a model for #{hit["id"]}, defaulting to ActiveFedora::Base" unless best_model_match if ActiveFedora::Base.logger
  best_model_match || ActiveFedora::Base
end

def self.classes_from_solr_document(hit, opts = {})
  classes = []
  hit[HAS_MODEL_SOLR_FIELD].each { |value| classes << Model.from_class_uri(value) }
  classes.compact
end

def self.lazy_reify_solr_results(solr_results, opts = {})
  Enumerator.new do |yielder|
    solr_results.each do |hit|
      yielder.yield(reify_solr_result(hit, opts))
    end
  end
end

def self.reify_solr_result(hit, opts = {})
  klass = class_from_solr_document(hit)
  klass.find(hit[SOLR_DOCUMENT_ID], cast: true)
end

def self.reify_solr_results(solr_results, opts = {})
  solr_results.collect { |hit| reify_solr_result(hit, opts) }
end