# 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 MachineLearning
      module Actions
        # Start datafeeds.
        # A datafeed must be started in order to retrieve data from Elasticsearch. A datafeed can be started and stopped
        # multiple times throughout its lifecycle.
        # Before you can start a datafeed, the anomaly detection job must be open. Otherwise, an error occurs.
        # If you restart a stopped datafeed, it continues processing input data from the next millisecond after it was stopped.
        # If new data was indexed for that exact millisecond between stopping and starting, it will be ignored.
        # When Elasticsearch security features are enabled, your datafeed remembers which roles the last user to create or
        # update it had at the time of creation or update and runs the query using those same roles. If you provided secondary
        # authorization headers when you created or updated the datafeed, those credentials are used instead.
        #
        # @option arguments [String] :datafeed_id A numerical character string that uniquely identifies the datafeed. This identifier can contain lowercase
        #  alphanumeric characters (a-z and 0-9), hyphens, and underscores. It must start and end with alphanumeric
        #  characters. (*Required*)
        # @option arguments [String, Time] :end The time that the datafeed should end, which can be specified by using one of the following formats:
        #  - ISO 8601 format with milliseconds, for example `2017-01-22T06:00:00.000Z`
        #  - ISO 8601 format without milliseconds, for example `2017-01-22T06:00:00+00:00`
        #  - Milliseconds since the epoch, for example `1485061200000`
        #  Date-time arguments using either of the ISO 8601 formats must have a time zone designator, where `Z` is accepted
        #  as an abbreviation for UTC time. When a URL is expected (for example, in browsers), the `+` used in time zone
        #  designators must be encoded as `%2B`.
        #  The end time value is exclusive. If you do not specify an end time, the datafeed
        #  runs continuously.
        # @option arguments [String, Time] :start The time that the datafeed should begin, which can be specified by using the same formats as the `end` parameter.
        #  This value is inclusive.
        #  If you do not specify a start time and the datafeed is associated with a new anomaly detection job, the analysis
        #  starts from the earliest time for which data is available.
        #  If you restart a stopped datafeed and specify a start value that is earlier than the timestamp of the latest
        #  processed record, the datafeed continues from 1 millisecond after the timestamp of the latest processed record.
        # @option arguments [Time] :timeout Specifies the amount of time to wait until a datafeed starts. Server default: 20s.
        # @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 request body
        #
        # @see https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-ml-start-datafeed
        #
        def start_datafeed(arguments = {})
          request_opts = { endpoint: arguments[:endpoint] || 'ml.start_datafeed' }

          defined_params = [:datafeed_id].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 'datafeed_id' missing" unless arguments[:datafeed_id]

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

          body = arguments.delete(:body)

          _datafeed_id = arguments.delete(:datafeed_id)

          method = Elasticsearch::API::HTTP_POST
          path   = "_ml/datafeeds/#{Utils.listify(_datafeed_id)}/_start"
          params = Utils.process_params(arguments)

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