#nullable enable

using System;
using Cysharp.Threading.Tasks;
using ShrinkApp;

namespace ShrinkCommand.Integration.App
{
    [ShrinkAppModuleInstaller]
    [Obsolete("ClassicHost compatibility only. ContextLoader projects should use ShrinkCommandAppComponent from a composition root.")]
    public sealed class ShrinkCommandAppInstaller : IShrinkAppModuleInstaller
    {
        public string ModuleId => "shrink.command";
        public int Order => -1500;
        public System.Collections.Generic.IReadOnlyList<string> DependsOn => Array.Empty<string>();

        public void RegisterServices(ShrinkAppContext context)
        {
            context.Services.Register(new ShrinkCommandAppService(ShrinkCommandRuntime.Default));
        }

        public UniTask InitializeAsync(ShrinkAppContext context)
        {
            return UniTask.CompletedTask;
        }
    }

    public sealed class ShrinkCommandAppService
    {
        public ShrinkCommandAppService(ShrinkCommandService service)
        {
            Service = service ?? throw new ArgumentNullException(nameof(service));
        }

        public ShrinkCommandService Service { get; }

        public UniTask<ShrinkCommandExecutionResult> ExecuteAsync(
            IShrinkCommandSource source,
            string rawInput,
            System.Threading.CancellationToken cancellationToken = default)
            => Service.ExecuteAsync(source, rawInput, cancellationToken);

        public string BuildHelp(IShrinkCommandSource? source, string? prefix = null)
            => Service.BuildHelp(source, prefix);

        public System.Collections.Generic.IReadOnlyList<ShrinkCommandDescriptor> Commands => Service.Commands;
    }
}