/* 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;
using OpenSearch.Net.Utf8Json;

namespace OpenSearch.Client
{
	[InterfaceDataContract]
	[ReadAs(typeof(SpanContainingQuery))]
	public interface ISpanContainingQuery : ISpanSubQuery
	{
		[DataMember(Name ="big")]
		ISpanQuery Big { get; set; }

		[DataMember(Name ="little")]
		ISpanQuery Little { get; set; }
	}

	public class SpanContainingQuery : QueryBase, ISpanContainingQuery
	{
		public ISpanQuery Big { get; set; }
		public ISpanQuery Little { get; set; }
		protected override bool Conditionless => IsConditionless(this);

		internal override void InternalWrapInContainer(IQueryContainer c) => c.SpanContaining = this;

		internal static bool IsConditionless(ISpanContainingQuery q)
		{
			var exclude = q.Little as IQuery;
			var include = q.Big as IQuery;

			return exclude == null && include == null
				|| include == null && exclude.Conditionless
				|| exclude == null && include.Conditionless
				|| exclude != null && exclude.Conditionless && include != null && include.Conditionless;
		}
	}

	public class SpanContainingQueryDescriptor<T>
		: QueryDescriptorBase<SpanContainingQueryDescriptor<T>, ISpanContainingQuery>
			, ISpanContainingQuery where T : class
	{
		protected override bool Conditionless => SpanContainingQuery.IsConditionless(this);
		ISpanQuery ISpanContainingQuery.Big { get; set; }
		ISpanQuery ISpanContainingQuery.Little { get; set; }

		public SpanContainingQueryDescriptor<T> Little(Func<SpanQueryDescriptor<T>, ISpanQuery> selector) =>
			Assign(selector(new SpanQueryDescriptor<T>()), (a, v) => a.Little = v);

		public SpanContainingQueryDescriptor<T> Big(Func<SpanQueryDescriptor<T>, ISpanQuery> selector) =>
			Assign(selector(new SpanQueryDescriptor<T>()), (a, v) => a.Big = v);
	}
}