# Licensed to Elasticsearch B.V. under one or more contributor
# 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.
#
# This code was automatically generated from the Elasticsearch Specification
# See https://github.com/elastic/elasticsearch-specification
# See Elasticsearch::ES_SPECIFICATION_COMMIT for commit hash.
module Elasticsearch
  module API
    module Actions
      # Get the search shards.
      # Get the indices and shards that a search request would be run against.
      # This information can be useful for working out issues or planning optimizations with routing and shard preferences.
      # When filtered aliases are used, the filter is returned as part of the `indices` section.
      # If the Elasticsearch security features are enabled, you must have the `view_index_metadata` or `manage` index privilege for the target data stream, index, or alias.
      #
      # @option arguments [String, Array] :index A comma-separated list of data streams, indices, and aliases to search.
      #  It supports wildcards (`*`).
      #  To search all data streams and indices, omit this parameter or use `*` or `_all`.
      # @option arguments [Boolean] :allow_no_indices A setting that does two separate checks on the index expression.
      #  If `false`, the request returns an error (1) if any wildcard expression
      #  (including `_all` and `*`) resolves to zero matching indices or (2) if the
      #  complete set of resolved indices, aliases or data streams is empty after all
      #  expressions are evaluated. If `true`, index expressions that resolve to no
      #  indices are allowed and the request returns an empty result.
      # @option arguments [String, Array<String>] :expand_wildcards Type of index that wildcard patterns can match.
      #  If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams.
      #  Supports comma-separated values, such as `open,hidden`. Server default: open.
      # @option arguments [Boolean] :ignore_unavailable If `false`, the request returns an error if it targets a concrete (non-wildcarded)
      #  index, alias, or data stream that is missing, closed, or otherwise unavailable.
      #  If `true`, unavailable concrete targets are silently ignored.
      # @option arguments [Boolean] :local If `true`, the request retrieves information from the local node only.
      # @option arguments [Time] :master_timeout The period to wait for a connection to the master node.
      #  If the master node is not available before the timeout expires, the request fails and returns an error.
      #  IT can also be set to `-1` to indicate that the request should never timeout. Server default: 30s.
      # @option arguments [String] :preference The node or shard the operation should be performed on.
      #  It is random by default.
      # @option arguments [String, Array<String>] :routing A custom value used to route operations to a specific shard.
      #  Not allowed when `index.slice.enabled` is `true` for the target index; use `_slice` instead.
      # @option arguments [String] :_slice The slice identifier for routing the search to a specific slice.
      #  When provided, the request is limited to shards that match the given slice value.
      #  Use the special value `_all` to query all slices without restricting to a routing value.
      #  Required when `index.slice.enabled` is `true` for the target index; not allowed when `index.slice.enabled` is `false`.
      # @option arguments [Boolean] :error_trace When set to `true` Elasticsearch will include the full stack trace of errors
      #  when they occur.
      # @option arguments [String, Array<String>] :filter_path Comma-separated list of filters in dot notation which reduce the response
      #  returned by Elasticsearch.
      # @option arguments [Boolean] :human When set to `true` will return statistics in a format suitable for humans.
      #  For example `"exists_time": "1h"` for humans and
      #  `"exists_time_in_millis": 3600000` for computers. When disabled the human
      #  readable values will be omitted. This makes sense for responses being consumed
      #  only by machines.
      # @option arguments [Boolean] :pretty If set to `true` the returned JSON will be "pretty-formatted". Only use
      #  this option for debugging only.
      # @option arguments [Hash] :headers Custom HTTP headers
      #
      # @see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-search-shards
      #
      def search_shards(arguments = {})
        request_opts = { endpoint: arguments[:endpoint] || 'search_shards' }

        defined_params = [:index].each_with_object({}) do |variable, set_variables|
          set_variables[variable] = arguments[variable] if arguments.key?(variable)
        end
        request_opts[:defined_params] = defined_params unless defined_params.empty?

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

        body = nil

        _index = arguments.delete(:index)

        method = Elasticsearch::API::HTTP_GET
        path   = if _index
                   "#{Utils.listify(_index)}/_search_shards"
                 else
                   '_search_shards'
                 end
        params = Utils.process_params(arguments)

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