/* 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.Runtime.Serialization;
using OpenSearch.Net.Utf8Json;

namespace OpenSearch.Client
{
	/// <summary>
	/// The truncate token filter can be used to truncate tokens into a specific length. This can come in handy with keyword (single token)
	/// <para> based mapped fields that are used for sorting in order to reduce memory usage.</para>
	/// </summary>
	public interface ITruncateTokenFilter : ITokenFilter
	{
		/// <summary>
		/// length parameter which control the number of characters to truncate to, defaults to 10.
		/// </summary>
		[DataMember(Name ="length")]
		[JsonFormatter(typeof(NullableStringIntFormatter))]
		int? Length { get; set; }
	}

	/// <inheritdoc />
	public class TruncateTokenFilter : TokenFilterBase, ITruncateTokenFilter
	{
		public TruncateTokenFilter() : base("truncate") { }

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

	/// <inheritdoc />
	public class TruncateTokenFilterDescriptor
		: TokenFilterDescriptorBase<TruncateTokenFilterDescriptor, ITruncateTokenFilter>, ITruncateTokenFilter
	{
		protected override string Type => "truncate";

		int? ITruncateTokenFilter.Length { get; set; }

		/// <inheritdoc />
		public TruncateTokenFilterDescriptor Length(int? length) => Assign(length, (a, v) => a.Length = v);
	}
}