/* 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.
*/

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Net.Http;

namespace OpenSearch.Net
{
	/// <summary>
	/// Thread-safety: This class is immutable
	/// <para>https://github.com/dotnet/runtime/blob/master/src/libraries/Microsoft.Extensions.Http/src/ExpiredHandlerTrackingEntry.cs</para>
	/// </summary>
	internal class ExpiredHandlerTrackingEntry
	{
		private readonly WeakReference _livenessTracker;

		// IMPORTANT: don't cache a reference to `other` or `other.Handler` here.
		// We need to allow it to be GC'ed.
		public ExpiredHandlerTrackingEntry(ActiveHandlerTrackingEntry other)
		{
			Key = other.Key;

			_livenessTracker = new WeakReference(other.Handler);
			InnerHandler = other.Handler.InnerHandler;
		}

		public bool CanDispose => !_livenessTracker.IsAlive;

		public HttpMessageHandler InnerHandler { get; }

		public int Key { get; }
	}
}