/* 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.Linq;
using OpenSearch.OpenSearch.Xunit.XunitPlumbing;
using FluentAssertions;
using OpenSearch.Client;

namespace Tests.QueryDsl.BoolDsl.Operators
{
	public class UnaryAddOperatorUsageTests : OperatorUsageBase
	{
		[U] public void UnaryAdd()
		{
			ReturnsBool(+Query && +Query, q => +q.Query() && +q.Query(), b =>
			{
				b.Filter.Should().NotBeEmpty().And.HaveCount(2);
				b.Must.Should().BeNull();
				b.Should.Should().BeNull();
				b.MustNot.Should().BeNull();
			});

			ReturnsBool(+Query || +Query || +ConditionlessQuery, q => +q.Query() || +q.Query() || +q.ConditionlessQuery(), b =>
			{
				b.Should.Should().NotBeEmpty().And.HaveCount(2);
				b.Must.Should().BeNull();
				b.MustNot.Should().BeNull();
				b.MustNot.Should().BeNull();
				foreach (IQueryContainer q in b.Should)
				{
					q.Bool.Should().NotBeNull();
					q.Bool.Filter.Should().NotBeEmpty().And.HaveCount(1);
				}
			});

			ReturnsSingleQuery(+Query || +ConditionlessQuery, q => +q.Query() || +q.ConditionlessQuery(),
				c => c.Bool.Filter.Should().NotBeNull().And.HaveCount(1));

			ReturnsSingleQuery(+ConditionlessQuery || +Query, q => +q.ConditionlessQuery() || +q.Query(),
				c => c.Bool.Filter.Should().NotBeNull().And.HaveCount(1));

			ReturnsSingleQuery(+Query || +NullQuery, q => +q.Query() || +q.NullQuery(),
				c => c.Bool.Filter.Should().NotBeNull().And.HaveCount(1));

			ReturnsSingleQuery(+NullQuery && +Query, q => +q.NullQuery() && +q.Query(),
				c => c.Bool.Filter.Should().NotBeNull().And.HaveCount(1));

			ReturnsSingleQuery(+ConditionlessQuery || +ConditionlessQuery && +ConditionlessQuery || +Query,
				q => +q.ConditionlessQuery() || +q.ConditionlessQuery() && +q.ConditionlessQuery() || +q.Query(),
				c => c.Bool.Filter.Should().NotBeNull().And.HaveCount(1));

			ReturnsSingleQuery(
				+NullQuery || +NullQuery || +ConditionlessQuery || +Query,
				q => +q.NullQuery() || +q.NullQuery() || +q.ConditionlessQuery() || +q.Query(),
				c => c.Bool.Filter.Should().NotBeNull());

			ReturnsNull(+NullQuery || +ConditionlessQuery, q => +q.NullQuery() || +q.ConditionlessQuery());
			ReturnsNull(+ConditionlessQuery && +NullQuery, q => +q.ConditionlessQuery() && +q.NullQuery());
			ReturnsNull(+ConditionlessQuery || +ConditionlessQuery, q => +q.ConditionlessQuery() || +q.ConditionlessQuery());
			ReturnsNull(
				+ConditionlessQuery || +ConditionlessQuery || +ConditionlessQuery || +ConditionlessQuery,
				q => +q.ConditionlessQuery() || +q.ConditionlessQuery() || +q.ConditionlessQuery() || +q.ConditionlessQuery()
			);
			ReturnsNull(
				+NullQuery || +ConditionlessQuery || +ConditionlessQuery || +ConditionlessQuery,
				q => +q.NullQuery() || +q.ConditionlessQuery() || +q.ConditionlessQuery() || +q.ConditionlessQuery()
			);
		}

		[U]
		public void CombiningManyUsingAggregate()
		{
			var lotsOfUnaryAdds = Enumerable.Range(0, 100).Aggregate(new QueryContainer(), (q, c) => q && +Query, q => q);
			LotsOfUnaryAdds(lotsOfUnaryAdds);
		}

		[U]
		public void CombiningManyUsingForeachInitializingWithNull()
		{
			QueryContainer container = null;
			foreach (var i in Enumerable.Range(0, 100))
				container &= +Query;
			LotsOfUnaryAdds(container);
		}

		[U]
		public void CombiningManyUsingForeachInitializingWithDefault()
		{
			var container = new QueryContainer();
			foreach (var i in Enumerable.Range(0, 100))
				container &= +Query;
			LotsOfUnaryAdds(container);
		}

		private void LotsOfUnaryAdds(IQueryContainer lotsOfUnaryAdds)
		{
			lotsOfUnaryAdds.Should().NotBeNull();
			lotsOfUnaryAdds.Bool.Should().NotBeNull();
			lotsOfUnaryAdds.Bool.Filter.Should().NotBeEmpty().And.HaveCount(100);
		}

		[U]
		public void CombindingManyBoolFiltersUsingOrsShouldFlatten()
		{
			var container = new QueryContainer();
			foreach (var i in Enumerable.Range(0, 100))
				container |= +Query;
			var c = container as IQueryContainer;

			c.Bool.Should.Should().NotBeEmpty().And.HaveCount(100);
		}
	}
}