/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 * 
 *  http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file 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.Reflection;
using Amazon.Extensions.Configuration.SystemsManager.AppConfig;
using Amazon.Runtime;

namespace Amazon.Extensions.Configuration.SystemsManager.Internal
{
    public static class ServiceClientAppender
    {
        private const string UserAgentHeader = "User-Agent";
        private static readonly string AssemblyVersion = typeof(AppConfigProcessor).GetTypeInfo().Assembly.GetName().Version.ToString();

        public static void ServiceClientBeforeRequestEvent(object sender, RequestEventArgs e)
        {
            if (e is WebServiceRequestEventArgs args)
            {
                if (args.Headers.ContainsKey(UserAgentHeader))
                {
                    args.Headers[UserAgentHeader] = args.Headers[UserAgentHeader] + " SSMConfigProvider/" + AssemblyVersion;
                }
            }
        }
    }
}