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

namespace XF.Domain.Extensions
{
    public static class TypeDefineExtensions
    {
        /// <summary>
        /// 判断类型是否实现某个泛型
        /// </summary>
        /// <param name="type">类型</param>
        /// <param name="generic">泛型类型</param>
        /// <returns>bool</returns>
        public static bool HasImplementedOf(this Type type, Type generic)
        {
            // 检查接口类型
            var isTheRawGenericType = type.GetInterfaces().Any(IsTheRawGenericType);
            if (isTheRawGenericType) return true;

            // 检查类型
            while (type != null && type != typeof(object))
            {
                isTheRawGenericType = IsTheRawGenericType(type);
                if (isTheRawGenericType) return true;
                type = type.BaseType;
            }

            return false;

            // 判断逻辑
            bool IsTheRawGenericType(Type type) => generic == (type.IsGenericType ? type.GetGenericTypeDefinition() : type);
        }
    }
}
