using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;

namespace Mvc
{
    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
    public class PriceValidationAttribute : ValidationAttribute, IClientValidatable
    {
        private decimal minPrice = 0.01M;
        
        private decimal maxPrice = 100.00M;

        public PriceValidationAttribute(double min,double max)
        {
            minPrice = Convert.ToDecimal(min);
            maxPrice = Convert.ToDecimal(max);
        }

        public override bool IsValid(object value)
        {
            var price = (decimal?)value;
            if (price.HasValue)
            {
                if (price < this.minPrice || price > this.maxPrice)
                    return false;
            }
            return true;
        }

        public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
        {
            var rule = new ModelClientPriceRangeValidationRule(base.ErrorMessage, this.minPrice, this.maxPrice);

            yield return rule;
        }
    }

    public class ModelClientPriceRangeValidationRule : ModelClientValidationRule
    {
        public ModelClientPriceRangeValidationRule(string errorMessage, decimal minPrice, decimal maxPrice)
        {
            ErrorMessage = errorMessage;

            ValidationType = "priceonrange";

            ValidationParameters.Add("minprice", minPrice);
            ValidationParameters.Add("maxprice", maxPrice);
        }
    }
}