using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;

namespace Tnb.Common.Utils
{
    public class PropertyNotNullChecker<T>
    {
        private static readonly Dictionary<Type, Func<T, bool>> Cache = new Dictionary<Type, Func<T, bool>>();

        public static bool CheckAllPropertiesNotNull(T obj)
        {
            //Type type = typeof(T);

            //// 检查缓存中是否存在类型的检查方法
            //if (Cache.TryGetValue(type, out var checkFunc))
            //{
            //    return checkFunc(obj);
            //}

            //var properties = type.GetProperties();

            //// 创建表达式树的参数
            //var objParam = Expression.Parameter(type, "obj");

            //var propertyNotNullExpressions = new List<Expression>();

            //foreach (var property in properties)
            //{
            //    // 创建访问属性的表达式
            //    var propertyAccess = Expression.Property(objParam, property);

            //    // 创建检查属性非空的表达式
            //    var notNullExpression = Expression.NotEqual(propertyAccess, Expression.Constant(null));

            //    propertyNotNullExpressions.Add(notNullExpression);
            //}

            //// 创建所有属性非空的表达式
            //var allPropertiesNotNullExpression = Expression.AndAlso(propertyNotNullExpressions);

            //// 创建Lambda表达式
            //var lambda = Expression.Lambda<Func<T, bool>>(allPropertiesNotNullExpression, objParam);

            //// 编译表达式并执行
            //var func = lambda.Compile();

            //// 将类型和检查方法添加到缓存中
            //Cache[type] = func;

            //return func(obj);
            return false;
        }
    }

}