using System;
using System.ComponentModel.DataAnnotations;

namespace Szmedi.RvKits.Attributes
{
    public class GreaterThanAttribute : ValidationAttribute
    {
        public GreaterThanAttribute(string propertyName)
        {
            PropertyName = propertyName;
        }

        public string PropertyName { get; }

        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            object
                instance = validationContext.ObjectInstance,
                otherValue = instance.GetType().GetProperty(PropertyName).GetValue(instance);

            return ((IComparable)value).CompareTo(otherValue) > 0 ? ValidationResult.Success : new("当前值小于另一个值");
        }
    }
}