using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using BITKit.UX;

#if UNITY_EDITOR
using UnityEditor;
#endif

using UnityEngine;

namespace BITKit.Mod
{
	public class UnityModService : MonoBehaviour
	{
		[SerializeReference,SubclassSelector] private IReference[] referencedAssemblies;
		private async void Start()
		{
			//DI.TryGet<IUXWaiting>(out var waiting);
			IUXWaiting waiting = null;
			var handle = waiting?.Get();
			handle?.SetMessage("正在初始化Mod服务");
			
			if (Application.isEditor is false)
			{
				BIT4Log.Log<UnityModService>($"UnityPlayer所在位置:{Application.dataPath}");

				BIT4Log.Log<UnityModService>($"{nameof(System.Linq)}位于{typeof(Enumerable).Assembly.Location}");
			}


			foreach (var x in referencedAssemblies)
			{
				var dllName = x.Value.Contains(".dll") ? x.Value : $"{x.Value}.dll";

				if (SearchDll(dllName,out var dll) is false)
				{
					BIT4Log.Warning<UnityModService>($"未找到:{dll}");
					continue;
				}

				BITSharp.ReferencedAssemblies.Add(@$"""{dll}""");
			}

			try
			{
				ModService.Initialize();
			}
			catch (Exception e)
			{
				BIT4Log.Warning<UnityModService>("初始化失败");
				BIT4Log.LogException(e);
				return;
			}
			
			destroyCancellationToken.Register(ModService.Dispose);

			ModService.OnPackageLoad+=OnPackageLoad;
			
			
			var packages = await ModService.SearchPackages();
			if (destroyCancellationToken.IsCancellationRequested) return;
			foreach (var package in packages)
			{
				await ModService.LoadFromPackage(package.PackagePath);
				if (destroyCancellationToken.IsCancellationRequested) return;
			}


			destroyCancellationToken.Register(() =>
			{
				ModService.OnPackageLoad-=OnPackageLoad;
			});
			
			waiting?.Release(handle);
		}

		private void OnPackageLoad(ModPackage obj)
		{
			var loadedDlls = referencedAssemblies.Cast();
			var reportBuilder = new System.Text.StringBuilder();
			
			//对比已加载的dll和当前引用的dll
			foreach (var x in obj.Dlls.Except(loadedDlls))
			{
				if (SearchDll(x, out var dll) is false)
				{
					BIT4Log.Warning<UnityModService>($"未找到:{dll}");
					continue;
				}
				
				BITSharp.ReferencedAssemblies.Add(@$"""{dll}""");
				reportBuilder.AppendLine($"加载:{dll}");
			}
			BIT4Log.Log<UnityModService>(reportBuilder.ToString());
		}
		private bool SearchDll(string dllName,out string dll,params string[] moreFolder)
		{
#if UNITY_EDITOR
			dll = System.IO.Path.Combine(Environment.CurrentDirectory, "Library", "ScriptAssemblies", dllName);
			var folder = EditorApplication.applicationPath;
			folder = Path.GetDirectoryName(folder);
			if(File.Exists(dll) is false)
			{
				dll = Path.Combine(folder,"Data", "MonoBleedingEdge", "lib","mono","unityjit-win32",dllName);
			}
			if (File.Exists(dll) is false)
			{
				dll = Path.Combine(folder,"Data", "MonoBleedingEdge", "lib","mono","unityjit-win32","Facades",dllName);
			}
            
#else
				 dll = System.IO.Path.Combine(Environment.CurrentDirectory,$"{Application.productName}_Data", "Managed", dllName);
#endif
			return File.Exists(dll);
		}
	}
}