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# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#	http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

module Elasticsearch
  module API
    module Cat
      module Actions

        # Return information about field data usage across the cluster
        #
        # @example Return the total size of field data
        #
        #     client.cat.fielddata
        #
        # @example Return both the total size and size for specific fields
        #
        #     client.cat.fielddata fields: 'title,body'
        #
        # @option arguments [List] :fields A comma-separated list of fields to include in the output
        # @option arguments [String] :bytes The unit in which to display byte values (options: b, k, m, g)
        # @option arguments [Boolean] :local Return local information, do not retrieve the state from master node
        #                                   (default: false)
        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
        # @option arguments [List] :h Comma-separated list of column names to display
        # @option arguments [Boolean] :help Return help information
        # @option arguments [Boolean] :v Verbose mode. Display column headers
        # @option arguments [List] :s Comma-separated list of column names or column aliases to sort by
        #
        # @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/master/cat-fielddata.html
        #
        def fielddata(arguments={})
          fields = arguments.delete(:fields)

          method = HTTP_GET
          path   = Utils.__pathify "_cat/fielddata", Utils.__listify(fields)
          params = Utils.__validate_and_extract_params arguments, ParamsRegistry.get(__method__)
          body   = nil

          perform_request(method, path, params, body).body
        end

        # Register this action with its valid params when the module is loaded.
        #
        # @since 6.1.1
        ParamsRegistry.register(:fielddata, [
            :format,
            :bytes,
            :local,
            :master_timeout,
            :h,
            :help,
            :s,
            :v,
            :fields ].freeze)
      end
    end
  end
end