using System.Collections.Specialized;
using System.Linq;
using System.Web.Routing;

namespace LeafWeb.WebCms.Utility
{
    public static class NameValueCollectionUtil
    {
        public static NameValueCollection GetNameValueCollection(this object obj, string prefix = "")
        {
            var nvs = new NameValueCollection();

            prefix =
                string.IsNullOrEmpty(prefix)
                    ? ""
                    : prefix + ".";

            foreach (var pi in obj.GetType().GetProperties().Where(p => p.CanWrite))
            {
                var value = pi.GetValue(obj, null);
                switch (value)
                {
                    case null:
                    case bool b when b == false:
                        continue;
                    default:
                        nvs.Add(prefix + pi.Name, value.ToString());
                        break;
                }
            }

            return nvs;
        }

        public static RouteValueDictionary ToRouteValueDictionary(this NameValueCollection nvc)
        {
            var routeValues = new RouteValueDictionary();
            foreach (var key in nvc.AllKeys)
                routeValues.Add(key, nvc[key]);
            return routeValues;
        }
    }
}