using System;
using System.Collections;
using ChadSoft.Validators;

namespace ChadSoft.Validation
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field,
        AllowMultiple = false, Inherited = true)]
    public class RangeValidatorAttribute : ValidatorAttribute
    {
        private readonly object _minVal;
        private readonly object _maxVal;

        public RangeValidatorAttribute(object minVal, object maxVal)
        {
            if (minVal == null) throw new ArgumentNullException("minVal");
            if (maxVal == null) throw new ArgumentNullException("maxVal");

            if (minVal.GetType() != maxVal.GetType())
                throw new ArgumentException("Min and Max values must be the same type.");

            _minVal = minVal;
            _maxVal = maxVal;
        }

        public override bool IsValid(object val)
        {
            if(!base.IsValid(val)) return false;

            return Comparer.Default.Compare(val, _minVal) != -1
                   && Comparer.Default.Compare(val, _maxVal) != 1;
        }
    }
}