/* 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.Diagnostics;
using System.Reflection;
using System.Text.RegularExpressions;

namespace OpenSearch.Net
{
	internal sealed class ClientVersionInfo : VersionInfo
	{
		private static readonly Regex VersionRegex = new Regex(@"(\d+\.)(\d+\.)(\d)");

		public static readonly ClientVersionInfo Empty = new ClientVersionInfo { Version = new Version(0, 0, 0), IsPrerelease = false };

		private ClientVersionInfo() { }

		public static ClientVersionInfo Create<T>()
		{
			var fullVersion = DetermineClientVersion(typeof(T));

			var clientVersion = new ClientVersionInfo();
			clientVersion.StoreVersion(fullVersion);
			return clientVersion;
		}

		private static string DetermineClientVersion(Type type)
		{
			try
			{
				var productVersion = FileVersionInfo.GetVersionInfo(type.GetTypeInfo().Assembly.Location)?.ProductVersion ?? EmptyVersion;

				if (productVersion == EmptyVersion)
					productVersion = Assembly.GetAssembly(type).GetName().Version.ToString();

				var match = VersionRegex.Match(productVersion);

				return match.Success ? match.Value : EmptyVersion;
			}
			catch
			{
				// ignore failures and fall through
			}

			return EmptyVersion;
		}
	}
}