/* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*
*  Licensed to Elasticsearch B.V. under one or more contributor
*  license agreements. See the NOTICE file distributed with
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*  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
*
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namespace OpenSearch.Client.Specification.IndicesApi
{
	public interface IMergeSchedulerSettings
	{
		/// <summary>
		/// If this is true (the default), then the merge scheduler will rate-limit IO (writes) for merges to an
		/// adaptive value depending on how many merges are requested over time. An application with a low indexing rate
		/// that unluckily suddenly requires a large merge will see that merge aggressively throttled,
		/// while an application doing heavy indexing will see the throttle move higher to allow merges to keep
		/// up with ongoing indexing.
		/// </summary>
		bool? AutoThrottle { get; set; }

		/// <summary>
		/// The maximum number of threads that may be merging at once. Defaults to
		/// <pre>Math.max(1, Math.min(4, Runtime.getRuntime().availableProcessors() / 2))</pre>
		/// which works well for a good solid-state-disk (SSD). If your index is on spinning platter drives instead,
		/// decrease this to 1.
		/// </summary>
		int? MaxThreadCount { get; set; }
	}

	public class MergeSchedulerSettings : IMergeSchedulerSettings
	{
		/// <inheritdoc />
		public bool? AutoThrottle { get; set; }

		/// <inheritdoc />
		public int? MaxThreadCount { get; set; }
	}

	public class MergeSchedulerSettingsDescriptor
		: DescriptorBase<MergeSchedulerSettingsDescriptor, IMergeSchedulerSettings>, IMergeSchedulerSettings
	{
		bool? IMergeSchedulerSettings.AutoThrottle { get; set; }
		int? IMergeSchedulerSettings.MaxThreadCount { get; set; }

		/// <inheritdoc />
		public MergeSchedulerSettingsDescriptor AutoThrottle(bool? throttle = true) =>
			Assign(throttle, (a, v) => a.AutoThrottle = v);

		/// <inheritdoc />
		public MergeSchedulerSettingsDescriptor MaxThreadCount(int? maxThreadCount) =>
			Assign(maxThreadCount, (a, v) => a.MaxThreadCount = v);
	}
}