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

namespace BITKit.Mod
{
    public partial class ModService
    {
        public static Func<string, UniTask<object>> LoadAssetAsyncFactory;
        public static Func<string[], UniTask<IReadOnlyList<object>>> LoadAssetsAsyncFactory;

        public static async UniTask<IReadOnlyList<T>> LoadAssets<T>(params string[] tags)
        {
            var list = new List<T>();
            foreach (var func in LoadAssetsAsyncFactory.CastAsFunc())
            {
                foreach (var obj in await func.Invoke(tags))
                {
                    list.Add((T)obj);
                }
            }
            return list;
        }
        public static async UniTask<T> LoadAsset<T>(string location) where T : class
        {
            if (LoadAssetAsyncFactory is null)
            {
                throw new Exception("LoadAssetAsyncFactory is null!Make sure Processor has been initialized.");
            }
            foreach (var func in LoadAssetAsyncFactory.CastAsFunc())
            {
                var value = await func.Invoke(location);
                if (value is T value1)
                {
                    return value1;
                }
            }

            throw new Exception($"Asset not found: {location}");
        }
    }
}