#nullable enable

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

namespace ShrinkContext.AppAdapter;

public sealed class ShrinkContextAppHost
{
    private readonly ShrinkContextRuntime _runtime = new();
    private readonly ShrinkComponentCatalog _catalog = new();
    private readonly ShrinkContextLoader _loader;

    public ShrinkContextAppHost(ShrinkAppServices? services = null)
    {
        Services = services ?? new ShrinkAppServices();
        _loader = new ShrinkContextLoader(_runtime, _catalog);
    }

    public ShrinkAppServices Services { get; }
    public ShrinkContextRuntime Runtime => _runtime;
    public ShrinkLoaderTransactionDiagnostic? LastTransaction => _loader.LastTransaction;

    public void Register(string name, Func<IShrinkComponent> factory) => _catalog.Register(name, factory);
    public void Register<TComponent>(string name) where TComponent : IShrinkComponent, new() =>
        _catalog.Register<TComponent>(name);
    public UniTask ApplyAsync(IReadOnlyList<ShrinkLoaderEntry> entries) => _loader.ApplyAsync(entries);
    public UniTask ShutdownAsync() => _runtime.ShutdownAsync();
}