/* 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.Collections.Generic;
using System.Linq;
using OpenSearch.Client;
using Tests.Core.ManagedOpenSearch.Clusters;
using Tests.Domain;
using Tests.Framework.EndpointTests.TestState;
using static OpenSearch.Client.Infer;

namespace Tests.QueryDsl.Joining.Nested
{
	/**
	* Nested query allows to query nested objects / docs (see {ref_current}/nested.html[nested mapping]).
	* The query is executed against the nested objects / docs as if they were indexed as separate
	* docs (they are, internally) and resulting in the root parent doc (or parent nested mapping).
	*
	* See the OpenSearch documentation on {ref_current}/query-dsl-nested-query.html[nested query] for more details.
	*/
	public class NestedUsageTests : QueryDslUsageTestsBase
	{
		public NestedUsageTests(ReadOnlyCluster i, EndpointUsage usage) : base(i, usage) { }

		protected override ConditionlessWhen ConditionlessWhen => new ConditionlessWhen<INestedQuery>(a => a.Nested)
		{
			q => q.Query = null,
			q => q.Query = ConditionlessQuery,
			q => q.Path = null,
		};

		protected override QueryContainer QueryInitializer => new NestedQuery
		{
			Name = "named_query",
			Boost = 1.1,
			InnerHits = new InnerHits { Explain = true },
			Path = Field<Project>(p => p.Tags),
			Query = new TermsQuery
			{
				Field = Field<Project>(p => p.Tags.First().Name),
				Terms = new[] { "lorem", "ipsum" }
			},
			IgnoreUnmapped = true
		};

		protected override object QueryJson => new
		{
			nested = new
			{
				_name = "named_query",
				boost = 1.1,
				query = new
				{
					terms = new Dictionary<string, object>
					{
						{ "tags.name", new[] { "lorem", "ipsum" } }
					}
				},
				ignore_unmapped = true,
				path = "tags",
				inner_hits = new
				{
					explain = true
				}
			}
		};

		protected override QueryContainer QueryFluent(QueryContainerDescriptor<Project> q) => q
			.Nested(c => c
				.Name("named_query")
				.Boost(1.1)
				.InnerHits(i => i.Explain())
				.Path(p => p.Tags)
				.Query(nq => nq
					.Terms(t => t
						.Field(f => f.Tags.First().Name)
						.Terms("lorem", "ipsum")
					)
				)
				.IgnoreUnmapped()
			);
	}
}