using System;
using System.Linq;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Hncore.Infrastructure.Data;

namespace Hncore.Infrastructure.Common
{
    public class CheckHelper
    {
        public static void NotNull(object obj, string message = "")
        {
            if (ReferenceEquals(obj, null))
            {
                if (string.IsNullOrEmpty(message))
                {
                    message = nameof(obj) + "空引用";
                }

                throw new BusinessException(message);
            }
        }

        public static void NotEmpty(string obj, string message = "")
        {
            NotNull(obj,message);

            if (obj.Trim() == "")
            {
                if (string.IsNullOrEmpty(message))
                {
                    message = nameof(obj) + "值不能为空";
                }

                throw new BusinessException(message);
            }
        }
    }

    public static class Ext
    {
        public static void Check(this ModelStateDictionary dic)
        {
            if (!dic.IsValid)
            {
                var errs = dic.Values.SelectMany(x => x.Errors);

                string msg = "";

                errs.Select(t => t.Exception.Message).ToList().ForEach((s => { msg += s + "\r\n"; }));

                throw new Exception(msg);
            }
        }
    }
}