/* 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
*  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.
*/

namespace OpenSearch.Client
{
	public interface IShardBalancingHeuristicsSettings
	{
		/// <summary>
		/// Defines a factor to the number of shards per index allocated on a specific node (float). Defaults to 0.55f.
		/// Raising this raises the tendency to equalize the number of shards per index across all nodes in the cluster.
		/// </summary>
		float? BalanceIndex { get; set; }

		/// <summary>
		/// Defines the weight factor for shards allocated on a node (float). Defaults to 0.45f.
		///  Raising this raises the tendency to equalize the number of shards across all nodes in the cluster.
		/// </summary>
		float? BalanceShard { get; set; }

		/// <summary>
		/// Minimal optimization value of operations that should be performed (non negative float). Defaults to 1.0f.
		///  Raising this will cause the cluster to be less aggressive about optimizing the shard balance
		/// </summary>
		float? BalanceThreshold { get; set; }
	}

	public class ShardBalancingHeuristicsSettings : IShardBalancingHeuristicsSettings
	{
		/// <inheritdoc />
		public float? BalanceIndex { get; set; }

		/// <inheritdoc />
		public float? BalanceShard { get; set; }

		/// <inheritdoc />
		public float? BalanceThreshold { get; set; }
	}

	public class ShardBalancingHeuristicsSettingsDescriptor
		: DescriptorBase<ShardBalancingHeuristicsSettingsDescriptor, IShardBalancingHeuristicsSettings>, IShardBalancingHeuristicsSettings
	{
		float? IShardBalancingHeuristicsSettings.BalanceIndex { get; set; }
		float? IShardBalancingHeuristicsSettings.BalanceShard { get; set; }

		float? IShardBalancingHeuristicsSettings.BalanceThreshold { get; set; }

		/// <inheritdoc />
		public ShardBalancingHeuristicsSettingsDescriptor BalanceShard(float? balance) => Assign(balance, (a, v) => a.BalanceShard = v);

		/// <inheritdoc />
		public ShardBalancingHeuristicsSettingsDescriptor BalanceIndex(float? balance) => Assign(balance, (a, v) => a.BalanceIndex = v);

		/// <inheritdoc />
		public ShardBalancingHeuristicsSettingsDescriptor BalanceThreshold(float? balance) => Assign(balance, (a, v) => a.BalanceThreshold = v);
	}
}