using System;
using System.Collections;

namespace learun.wechat
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.06
	/// 描 述：不能为空属性
	/// </summary>
	public class IsNotNullAttribute : Attribute, IVerifyAttribute
	{
		private bool IsNotNull { get; set; }

		private string Message { get; set; }

		/// <summary>
		///
		/// </summary>
		public IsNotNullAttribute()
		{
			IsNotNull = true;
			Message = "不能为空";
		}

		/// <summary>
		///
		/// </summary>
		/// <param name="isNotNull"></param>
		public IsNotNullAttribute(bool isNotNull)
		{
			IsNotNull = isNotNull;
			Message = "不能为空";
		}

		/// <summary>
		///
		/// </summary>
		/// <param name="isNull"></param>
		/// <param name="message"></param>
		public IsNotNullAttribute(bool isNull, string message)
		{
			IsNotNull = isNull;
			Message = message;
		}

		/// <summary>
		///
		/// </summary>
		/// <param name="type"></param>
		/// <param name="obj"></param>
		/// <param name="message"></param>
		/// <returns></returns>
		public bool Verify(Type type, object obj, out string message)
		{
			message = "";

			if (IsNotNull == false)
			{
				return true;
			}

			if (obj == null)
			{
				message = Message;
				return false;
			}

			if (obj is IList)
			{
				if ((obj as IList).Count <= 0)
				{
					message = Message;
					return false;
				}
			}

			return true;
		}
	}
}