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# 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,
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# "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 MachineLearning
      module Actions
        # Retrieves anomaly detection job results for one or more categories.
        #
        # @option arguments [String] :job_id The name of the job
        # @option arguments [Long] :category_id The identifier of the category definition of interest
        # @option arguments [Integer] :from skips a number of categories
        # @option arguments [Integer] :size specifies a max number of categories to get
        # @option arguments [String] :partition_field_value Specifies the partition to retrieve categories for. This is optional, and should never be used for jobs where per-partition categorization is disabled.
        # @option arguments [Hash] :headers Custom HTTP headers
        # @option arguments [Hash] :body Category selection details if not provided in URI
        #
        # @see https://www.elastic.co/guide/en/elasticsearch/reference/current/ml-get-category.html
        #
        def get_categories(arguments = {})
          raise ArgumentError, "Required argument 'job_id' missing" unless arguments[:job_id]

          arguments = arguments.clone
          headers = arguments.delete(:headers) || {}

          body = arguments.delete(:body)

          _job_id = arguments.delete(:job_id)

          _category_id = arguments.delete(:category_id)

          method = if body
                     Elasticsearch::API::HTTP_POST
                   else
                     Elasticsearch::API::HTTP_GET
                   end

          path   = if _job_id && _category_id
                     "_ml/anomaly_detectors/#{Utils.__listify(_job_id)}/results/categories/#{Utils.__listify(_category_id)}"
                   else
                     "_ml/anomaly_detectors/#{Utils.__listify(_job_id)}/results/categories"
                   end
          params = Utils.process_params(arguments)

          Elasticsearch::API::Response.new(
            perform_request(method, path, params, body, headers)
          )
        end
      end
    end
  end
end
