using System.Collections.Generic;
using System.Web.Mvc;

namespace Kreta.Web.Helpers
{
    public static class RequiredIfReflector
    {
        public static bool RequiredIf<TModel>(HtmlHelper<TModel> helper, IDictionary<string, object> validationAttributes)
        {
            if (validationAttributes.Keys.Contains("data-val-requiredif-dependentproperty") && validationAttributes.Keys.Contains("data-val-requiredif-dependentvalue"))
            {
                string dependentPropertyName = (string)validationAttributes["data-val-requiredif-dependentproperty"];

                object requiredValue = validationAttributes["data-val-requiredif-dependentvalue"];

                var propertyInfo = helper.ViewData.Model.GetType().GetProperty(dependentPropertyName);

                object dependentPropertyValue = propertyInfo.GetValue(helper.ViewData.Model);

                return requiredValue.Equals(dependentPropertyValue);
            }
            return false;
        }
    }
}