using System;

using System.CommandLine;

using System.Linq;

using System.Reflection;

static partial class Program

{

static int _(string[] args,

string description = "",

Assembly? assembly = null,

string @namespace = "System.Application.Steps",

string methodName = "Add",

Func<int?>? init = null,

Action<RootCommand>? action = null)

{

try

{

var result = init?.Invoke();

if (result.HasValue) return result.Value;

var rootCommand = new RootCommand(description);

action?.Invoke(rootCommand);

var steps = (assembly ?? Assembly.GetCallingAssembly()).GetTypes()

.Where(x => x.Namespace == @namespace && x.IsClass && !x.IsGenericType && x.IsAbstract && x.IsSealed);

foreach (var step in steps)

{

var method = step.GetMethod(methodName, BindingFlags.Public | BindingFlags.Static, null, new[] { typeof(RootCommand) }, null);

method?.Invoke(null, new[] { rootCommand });

}

return rootCommand.InvokeAsync(args).Result;

}

catch (Exception? e)

{

while (e != null)

{

Console.WriteLine(e.ToString());

e = e.InnerException;

}

return 500;

}

}

}