/* 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.Collections.Generic;
using System.Threading;

namespace OpenSearch.Client
{
	public partial interface IOpenSearchClient
	{
		/// <summary>
		/// BulkAll is a generic helper that will partition any lazy stream of documents and send them to OpenSearch as concurrent bulk requests.
		/// <para />
		/// The index to target will be inferred from <typeparamref name="T" />. If no default index has been mapped for <typeparamref name="T" />
		/// using <see cref="ConnectionSettingsBase{TConnectionSettings}.DefaultMappingFor{TDocument}"/> on <see cref="Client.ConnectionSettings"/>, an exception will be thrown.
		/// Inference can be overridden using <see cref="BulkAllDescriptor{T}.Index"/>, and in addition,
		/// an index can be specified for each document using <see cref="BulkAllDescriptor{T}.BufferToBulk"/>.
		/// </summary>
		/// <param name="documents">The lazy stream of documents</param>
		BulkAllObservable<T> BulkAll<T>(
			IEnumerable<T> documents,
			Func<BulkAllDescriptor<T>, IBulkAllRequest<T>> selector,
			CancellationToken cancellationToken = default
		)
			where T : class;

		/// <summary>
		/// BulkAll is a generic helper that will partition any lazy stream of documents and send them to OpenSearch as concurrent bulk requests
		/// <para />
		/// The index to target will be inferred from <typeparamref name="T" />. If no default index has been mapped for <typeparamref name="T" />
		/// using <see cref="ConnectionSettingsBase{TConnectionSettings}.DefaultMappingFor{TDocument}"/> on <see cref="Client.ConnectionSettings"/>, an exception will be thrown.
		/// Inference can be overridden using <see cref="IBulkAllRequest{T}.Index"/>, and in addition,
		/// an index can be specified for each document using <see cref="IBulkAllRequest{T}.BufferToBulk"/>.
		/// </summary>
		BulkAllObservable<T> BulkAll<T>(IBulkAllRequest<T> request, CancellationToken cancellationToken = default) where T : class;
	}

	public partial class OpenSearchClient
	{
		///<inheritdoc />
		public BulkAllObservable<T> BulkAll<T>(
			IEnumerable<T> documents,
			Func<BulkAllDescriptor<T>, IBulkAllRequest<T>> selector,
			CancellationToken cancellationToken = default
		)
			where T : class =>
			BulkAll(selector.InvokeOrDefault(new BulkAllDescriptor<T>(documents)), cancellationToken);

		///<inheritdoc />
		public BulkAllObservable<T> BulkAll<T>(IBulkAllRequest<T> request, CancellationToken cancellationToken = default)
			where T : class =>
			new BulkAllObservable<T>(this, request, cancellationToken);
	}
}