#nullable enable

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

namespace ShrinkDataSaver.Integration
{
    /// <summary>注入 DataSaver 服务键并把其原生事件显式接到 EventBus。</summary>
    public sealed class ShrinkDataSaverEventBusComponent : IShrinkComponent
    {
        public const string DataSaverServiceKey = "shrink.service.datasaver";
        public const string ProvideKey = "shrink.integration.datasaver-eventbus";

        private static readonly string[] InjectKeys = { DataSaverServiceKey };
        private static readonly string[] ProvideKeys = { ProvideKey };

        public string Name => "shrink.integration.datasaver-eventbus";
        public IReadOnlyList<string> Inject => InjectKeys;
        public IReadOnlyList<string> Provide => ProvideKeys;

        public UniTask ApplyAsync(ShrinkCtx ctx, object? config)
        {
            _ = ctx.Get<object>(DataSaverServiceKey);
            DataSaverEventBusBridge.Register();
            ctx.EffectInverse(() =>
            {
                DataSaverEventBusBridge.Unregister();
                return UniTask.CompletedTask;
            });
            ctx.Set(ProvideKey, Name);
            return UniTask.CompletedTask;
        }
    }
}