/* 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.Linq.Expressions;

namespace OpenSearch.Client
{
	public abstract class ClrPropertyMappingBase<TDocument> : IClrPropertyMapping<TDocument>
		where TDocument : class
	{
		protected ClrPropertyMappingBase(Expression<Func<TDocument, object>> property) => Self.Property = property;

		protected IClrPropertyMapping<TDocument> Self => this;
		bool IClrPropertyMapping<TDocument>.Ignore { get; set; }
		string IClrPropertyMapping<TDocument>.NewName { get; set; }
		Expression<Func<TDocument, object>> IClrPropertyMapping<TDocument>.Property { get; set; }

		IPropertyMapping IClrPropertyMapping<TDocument>.ToPropertyMapping() => Self.Ignore
			? PropertyMapping.Ignored
			: new PropertyMapping { Name = Self.NewName };
	}

	public interface IClrPropertyMapping<TDocument> where TDocument : class
	{
		bool Ignore { get; set; }
		string NewName { get; set; }
		Expression<Func<TDocument, object>> Property { get; set; }

		IPropertyMapping ToPropertyMapping();
	}

	public class IgnoreClrPropertyMapping<TDocument> : ClrPropertyMappingBase<TDocument> where TDocument : class
	{
		public IgnoreClrPropertyMapping(Expression<Func<TDocument, object>> property) : base(property) => Self.Ignore = true;
	}

	public class RenameClrPropertyMapping<TDocument> : ClrPropertyMappingBase<TDocument> where TDocument : class
	{
		public RenameClrPropertyMapping(Expression<Func<TDocument, object>> property, string newName) : base(property)
		{
			newName.ThrowIfNull(nameof(newName));
			Self.NewName = newName;
		}
	}
}