/* 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.
*/

using System;
using System.Runtime.Serialization;

namespace OpenSearch.Client.Specification.IndicesApi
{
	/// <summary>
	/// A similarity that allows a script to be used in order to specify how scores should be computed.
	/// </summary>
	public interface IScriptedSimilarity : ISimilarity
	{
		/// <summary>
		/// Script to calculate similarity
		/// </summary>
		[DataMember(Name ="script")]
		IScript Script { get; set; }
	}

	/// <inheritdoc />
	public class ScriptedSimilarity : IScriptedSimilarity
	{
		/// <inheritdoc />
		public IScript Script { get; set; }

		public string Type => "scripted";
	}

	/// <inheritdoc cref="IScriptedSimilarity" />
	public class ScriptedSimilarityDescriptor
		: DescriptorBase<ScriptedSimilarityDescriptor, IScriptedSimilarity>, IScriptedSimilarity
	{
		IScript IScriptedSimilarity.Script { get; set; }
		string ISimilarity.Type => "scripted";

		/// <inheritdoc cref="IScriptedSimilarity.Script" />
		public ScriptedSimilarityDescriptor Script(Func<ScriptDescriptor, IScript> selector) =>
			Assign(selector, (a, v) => a.Script = v?.Invoke(new ScriptDescriptor()));
	}
}