/*
 * Licensed to the SkyAPM under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The SkyAPM 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.Reflection;
using Microsoft.Extensions.CommandLineUtils;

namespace SkyApm.DotNet.CLI.Extensions
{
    internal static class CommandLineApplicationExtensions
    {
        public static CommandOption HelpOption(this CommandLineApplication app)
            => app.HelpOption("-?|-h|--help");

        public static CommandOption VerboseOption(this CommandLineApplication app)
            => app.Option("-v|--verbose", "Show verbose output", CommandOptionType.NoValue, inherited: true);

        public static void OnExecute(this CommandLineApplication app, Action action)
            => app.OnExecute(() =>
            {
                action();
                return 0;
            });

        public static void VersionOptionFromAssemblyAttributes(this CommandLineApplication app, Assembly assembly)
            => app.VersionOption("--version", GetInformationalVersion(assembly));

        private static string GetInformationalVersion(Assembly assembly)
        {
            var attribute = assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>();

            var versionAttribute = attribute == null
                ? assembly.GetName().Version.ToString()
                : attribute.InformationalVersion;

            return versionAttribute;
        }
    }
}