using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using AYellowpaper.SerializedCollections;
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>();
		}
		[SerializeField] private SerializedDictionary<ulong,string> pathsById;
		private void Start()
		{
			PathsById.Clear();
			foreach (var x in pathsById)
			{
				PathsById.Add(x.Key,x.Value);
			}
		}
		#if UNITY_EDITOR
		[BIT]
		private void BuildCache()
		{
			var guids = AssetDatabase.FindAssets($"t:Object",new[] {"Assets"});
			var paths = guids.Select(AssetDatabase.GUIDToAssetPath);
			
			var objects = new List<IAddressable>();
			var stringBuilder = new System.Text.StringBuilder();
			
				
			foreach (var path in paths)
			{
				var asset = AssetDatabase.LoadAssetAtPath<Object>(path);
				switch (asset)
				{
				 case GameObject go when go.TryGetComponent(out IAddressable addressable):
					 objects.Add(addressable);
					 break;
				 case IAddressable addressable:
					 objects.Add(addressable);
					 break;
				}
			}
			
			stringBuilder.AppendLine($"所有资源数量:{guids.Length},其中包含{objects.Count}个Addressable资源");
			
			pathsById.Clear();
			foreach (var x in objects)
			{
				if (x is not Object unityObject) continue;

				//if (x.AddressableId is ulong.MinValue or ulong.MaxValue)
				{
					x.AddressableId = RandomUlong.NextUlong;
					EditorUtility.SetDirty(unityObject);
				}

				try
				{
					if (x.AddressableId is not ulong.MinValue && !string.IsNullOrEmpty(x.AddressablePath))
					{
						if (pathsById.TryAdd(x.AddressableId, x.AddressablePath))
						{

						}
						else
						{
							stringBuilder.AppendLine($"资源{unityObject.name}的AddressableId:{x.AddressableId}已经存在");
						}

					}
					else
					{
						stringBuilder.AppendLine($"{unityObject.name}的AddressableId或AddressablePath为空");
					}
				}
				catch (Exception e)
				{
					stringBuilder.AppendLine($"{unityObject.name}遇到了错误:{e.Message}");
				}
			}
			EditorUtility.SetDirty(this);
			Debug.Log(stringBuilder);
		}
		#endif
	}	
	
	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);
			}
		}
	}
}