using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using AYellowpaper.SerializedCollections;
using BITKit.IO;
using Cysharp.Threading.Tasks;
using UnityEngine;
using YooAsset;
using Object = UnityEngine.Object;
using Random = UnityEngine.Random;
#if UNITY_EDITOR
using UnityEditor;
#endif

namespace BITKit
{
	public class AddressableHelper:MonoBehaviour
	{
		private static IDictionary<ulong,string> PathsById { get; } = new Dictionary<ulong, string>();
		public static T Get<T>(ulong id) where T : Object
		{
			var task = YooAssets.LoadAssetAsync<T>(PathsById[id]);
			task.WaitForAsyncComplete();
			return task.AssetObject.As<T>();
		}
		private void Start()
		{
			PathsById.Clear();
			
			YooAssetUtils.OnPackageRegistered += OnRegister;
			
			foreach (var registeredResource in YooAssetUtils.RegisteredResourcePackages)
			{
				OnRegister(registeredResource.PackageName);
			}

			destroyCancellationToken.Register(() =>
			{
				YooAssetUtils.OnPackageRegistered -= OnRegister;
			});
		}

		private static async void  OnRegister(string obj)
		{
			Stopwatch stopWatcher = new();
			stopWatcher.Start();
			
			BIT4Log.Log<AddressableHelper>($"开始注册:{obj}的资源");
			var package = YooAssets.GetPackage(obj);
			var assetInfos = package.GetAssetInfos(nameof(IAddressable));
			BIT4Log.Log<AddressableHelper>($"正在解析:{assetInfos.Length}个资源");
			var reportBuilder = new StringBuilder();
			foreach (var x in assetInfos)
			{
				var asyncHandle = YooAssets.LoadAssetAsync(x.AssetPath);
				await asyncHandle;
				var addressable = asyncHandle.AssetObject switch
				{
					IAddressable a=>a,
					MonoBehaviour m=>m.GetComponent<IAddressable>(),
					GameObject g=>g.GetComponent<IAddressable>(),
					_ => null
				};
				if (addressable is null) continue;
				if (PathsById.TryAdd(addressable.AddressableId, addressable.AddressablePath) is false)
				{
					var existing = PathsById[addressable.AddressableId];
					BIT4Log.Warning<AddressableHelper>($"{addressable.AddressablePath}的Id:{addressable.AddressableId}已被注册为{existing}");
				}
				reportBuilder.AppendLine($"{addressable.AddressablePath}的Id:{addressable.AddressableId}");
			}
			BIT4Log.Log<AddressableHelper>($"注册:{obj}的资源完成,耗时:{stopWatcher.ElapsedMilliseconds}ms");
			BIT4Log.Log<AddressableHelper>(reportBuilder.ToString());
		}
	}	
	
	public static class RandomUlong
	{
		private static readonly System.Random _random = new();

		public static ulong NextUlong
		{
			get
			{
				var buf = new byte[8];
				_random.NextBytes(buf);
				return BitConverter.ToUInt64(buf, 0);
			}
		}
	}
}