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# the Apache License, Version 2.0 (the "License"); you may
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
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module Elasticsearch
  module API
    module Indices
      module Actions
        # Updates an alias to point to a new index when the existing index
        # is considered to be too large or too old.
        #
        # @option arguments [String] :alias The name of the alias to rollover
        # @option arguments [String] :new_index The name of the rollover index
        # @option arguments [Boolean] :include_type_name Whether a type should be included in the body of the mappings.
        # @option arguments [Time] :timeout Explicit operation timeout
        # @option arguments [Boolean] :dry_run If set to true the rollover action will only be validated but not actually performed even if a condition matches. The default is false
        # @option arguments [Time] :master_timeout Specify timeout for connection to master
        # @option arguments [String] :wait_for_active_shards Set the number of active shards to wait for on the newly created rollover index before the operation returns.
        # @option arguments [Hash] :headers Custom HTTP headers
        # @option arguments [Hash] :body The conditions that needs to be met for executing rollover
        #
        # @see https://www.elastic.co/guide/en/elasticsearch/reference/7.17/indices-rollover-index.html
        #
        def rollover(arguments = {})
          raise ArgumentError, "Required argument 'alias' missing" unless arguments[:alias]

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

          arguments = arguments.clone

          _alias = arguments.delete(:alias)

          _new_index = arguments.delete(:new_index)

          method = Elasticsearch::API::HTTP_POST
          path   = if _alias && _new_index
                     "#{Utils.__listify(_alias)}/_rollover/#{Utils.__listify(_new_index)}"
                   else
                     "#{Utils.__listify(_alias)}/_rollover"
                   end
          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(:rollover, [
          :include_type_name,
          :timeout,
          :dry_run,
          :master_timeout,
          :wait_for_active_shards
        ].freeze)
      end
    end
  end
end