module AxleAttributes
  class Definition
    module Indexed
      def index
        options[:index]
      end

      ANALYZERS = [:snowball, :proper_noun, :simple]
      def analyzer_mapping
        {type: 'string', analyzer: index} if ANALYZERS.include?(index)
      end

      INDEXES_BY_TYPE = {
        array:    {type: "string", index: "not_analyzed", doc_values: true},
        boolean:  {type: "boolean", doc_values: true},
        float:    {type: "double", doc_values: true},
        integer:  {type: "long", doc_values: true},
        json:     {type: "boolean"},
        string:   {type: 'string', index_analyzer: 'keyword', search_analyzer: 'standard'},
        text:     {type: 'string', index_analyzer: 'keyword', search_analyzer: 'standard'},
        time:     {type: "date", format: "dateOptionalTime", doc_values: true},
        date:     {type: "date", format: "date", doc_values: true}
      }
      def index_mapping
        return unless index

        if mapping = analyzer_mapping
          multi_field_index(name, mapping)
        elsif index == true
          INDEXES_BY_TYPE[type] || (raise "unknown index type #{type.inspect} for #{name}")
        elsif index.is_a?(Hash)
          index
        end
      end

      def multi_field_index(field, analyzer_mapping)
        {type: "multi_field", fields: {field => {type: "string", index: "not_analyzed", doc_values: true}, analyzed: analyzer_mapping}}
      end
    end
  end
end