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# 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 Fleet
      module Actions
        # Run multiple Fleet searches.
        # Run several Fleet searches with a single API request.
        # The API follows the same structure as the multi search API.
        # However, similar to the Fleet search API, it supports the `wait_for_checkpoints` parameter.
        # This functionality is experimental and is not ready for production usage. Experimental
        # features may change or be removed at any time. Elastic will work to fix any issues, but
        # experimental features are not subject to the support SLA of official GA features. Specific
        # Support terms apply.
        #
        # @option arguments [String] :index A single target to search. If the target is an index alias, it must resolve to a single index.
        # @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 [Boolean] :ccs_minimize_roundtrips If true, network roundtrips between the coordinating node and remote clusters are minimized for cross-cluster search requests. Server default: true.
        # @option arguments [String, Array<String>] :expand_wildcards Type of index that wildcard expressions can match. If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams.
        # @option arguments [Boolean] :ignore_throttled If true, concrete, expanded or aliased indices are ignored when frozen.
        # @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 [Integer] :max_concurrent_searches Maximum number of concurrent searches the multi search API can execute.
        # @option arguments [Integer] :max_concurrent_shard_requests Maximum number of concurrent shard requests that each sub-search request executes per node. Server default: 5.
        # @option arguments [Integer] :pre_filter_shard_size Defines a threshold that enforces a pre-filter roundtrip to prefilter search shards based on query rewriting if the number of shards the search request expands to exceeds the threshold. This filter roundtrip can limit the number of shards significantly if for instance a shard can not match any documents based on its rewrite method i.e., if date filters are mandatory to match but the shard bounds and the query are disjoint.
        # @option arguments [String] :search_type Indicates whether global term and document frequencies should be used when scoring returned documents.
        # @option arguments [Boolean] :rest_total_hits_as_int If true, hits.total are returned as an integer in the response. Defaults to false, which returns an object.
        # @option arguments [Boolean] :typed_keys Specifies whether aggregation and suggester names should be prefixed by their respective types in the response.
        # @option arguments [Array<Integer>] :wait_for_checkpoints A comma separated list of checkpoints. When configured, the search API will only be executed on a shard
        #  after the relevant checkpoint has become visible for search. Defaults to an empty list which will cause
        #  Elasticsearch to immediately execute the search. Server default: [].
        # @option arguments [Boolean] :allow_partial_search_results If true, returns partial results if there are shard request timeouts or shard failures.
        #  If false, returns an error with no partial results.
        #  Defaults to the configured cluster setting `search.default_allow_partial_results`, which is true by default.
        # @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
        # @option arguments [Hash] :body searches
        #
        # @see https://www.elastic.co/docs/api/doc/elasticsearch/v9/operation-fleet-msearch
        #
        def msearch(arguments = {})
          request_opts = { endpoint: arguments[:endpoint] || 'fleet.msearch' }

          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?

          raise ArgumentError, "Required argument 'body' missing" unless arguments[:body]

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

          body = arguments.delete(:body)

          _index = arguments.delete(:index)

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

          if body.is_a?(Array) && body.any? { |d| d.key? :search }
            payload = body.each_with_object([]) do |item, sum|
              meta = item
              data = meta.delete(:search)

              sum << meta
              sum << data
            end.map { |item| Elasticsearch::API.serializer.dump(item) }
            payload << '' unless payload.empty?
            payload = payload.join("\n")
          elsif body.is_a?(Array)
            payload = body.map { |d| d.is_a?(String) ? d : Elasticsearch::API.serializer.dump(d) }
            payload << '' unless payload.empty?
            payload = payload.join("\n")
          else
            payload = body
          end

          Utils.update_ndjson_headers!(headers, client.transport.options.dig(:transport_options, :headers))
          Elasticsearch::API::Response.new(
            perform_request(method, path, params, payload, headers, request_opts)
          )
        end
      end
    end
  end
end
