# Licensed to Elasticsearch B.V under one or more agreements.
# Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
# See the LICENSE file in the project root for more information

module Elasticsearch
  module API
    module Cluster
      module Actions
        # Allows to manually change the allocation of individual shards in the cluster.
        #
        # @option arguments [Boolean] :dry_run Simulate the operation only and return the resulting state
        # @option arguments [Boolean] :explain Return an explanation of why the commands can or cannot be executed
        # @option arguments [Boolean] :retry_failed Retries allocation of shards that are blocked due to too many subsequent allocation failures
        # @option arguments [List] :metric Limit the information returned to the specified metrics. Defaults to all but metadata
        #   (options: _all,blocks,metadata,nodes,routing_table,master_node,version)

        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
        # @option arguments [Time] :timeout Explicit operation timeout
        # @option arguments [Hash] :headers Custom HTTP headers
        # @option arguments [Hash] :body The definition of `commands` to perform (`move`, `cancel`, `allocate`)
        #
        # @see https://www.elastic.co/guide/en/elasticsearch/reference/7.7/cluster-reroute.html
        #
        def reroute(arguments = {})
          headers = arguments.delete(:headers) || {}

          arguments = arguments.clone

          method = Elasticsearch::API::HTTP_POST
          path   = "_cluster/reroute"
          params = Utils.__validate_and_extract_params arguments, ParamsRegistry.get(__method__)

          body = arguments[:body] || {}
          perform_request(method, path, params, body, headers).body
        end

        # Register this action with its valid params when the module is loaded.
        #
        # @since 6.2.0
        ParamsRegistry.register(:reroute, [
          :dry_run,
          :explain,
          :retry_failed,
          :metric,
          :master_timeout,
          :timeout
        ].freeze)
end
      end
  end
end