using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Security;
using System.Text;
using System.Threading.Tasks;
using Cysharp.Threading.Tasks;
namespace BITKit
{
    public class DI
    {
        static readonly ConcurrentDictionary<Type, object> dictionary = new();
        [ExcuteOnStop]
        public static void Clear()
        {
            //dictionary.Clear();
        }

        public static void Register<Interface, Class>() where Class : new()
        {
            var type = typeof(Interface);

            lock (dictionary)
            {
                if (dictionary.ContainsKey(typeof(Interface)))
                {
                    BIT4Log.Log<DI>($"正在替换{type.Name}为{typeof(Class)}");
                }
            }

            lock (dictionary)
            {
                dictionary.GetOrAdd(typeof(Interface), new Class());
            }
        }
        public static void Register<Interface>(Interface c)
        {
            lock (dictionary)
            {
                dictionary.AddOrUpdate(typeof(Interface), c, (x, y) => c);
            }
        }
        public static void Register(Type t, Type c)
        {
            lock (dictionary)
                dictionary.AddOrUpdate(t, c, (x, y) => Activator.CreateInstance(c));
        }
        public static void Register(Type t, object c)
        {
            lock (dictionary)
                dictionary.AddOrUpdate(t, c, (x, y) => c);
        }
        public static T GetOrCreate<T>() where T : new()
        {
            lock (dictionary)
            {
                var di = dictionary.GetOrAdd(typeof(T), new T());
                if (di is T value)
                {
                    return value;
                }
            }
            throw new Exception();
        }
        public static T GetOrAdd<T>(Func<T> craftFactory)
        {
            lock (dictionary)
            {
                var di = dictionary.GetOrAdd(typeof(T), craftFactory.Invoke());
                if (di is T value)
                {
                    return value;
                }
            }
            throw new Exception();
        }
        public static T Get<T>()
        {
            lock (dictionary)
            {
                if (dictionary.TryGetValue(typeof(T), out var obj))
                {
                    if (obj is T i)
                    {
                        return i;
                    }
                }
                throw new NullReferenceException($"没有找到{typeof(T).Name}");
            }
        }
        public static async Task<Interface> GetAsync<Interface>()
        {
                await TaskHelper.WaitUntil(() => dictionary.ContainsKey(typeof(Interface)) && dictionary[typeof(Interface) ]is not null);

            return Get<Interface>();
        }
        public static void Inject(object obj)
        {
            foreach (var field in obj.GetType().GetFields())
            {
                if (field.GetCustomAttribute<ObsoleteAttribute>() is null &&
                    field.GetCustomAttribute<InjectAttribute>() is not null)
                {
                    lock (dictionary)
                    {
                        if(dictionary!.TryGetValue(field.FieldType,out var value))
                        {
                            BIT4Log.Log<DI>($"已为{obj.GetType().Name}.{field.Name}注入{value.GetType().Name}");
                            field.SetValue(obj,value);
                        }
                    }
                }
            }
        }
    }
}