using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace sharpknife.Utils
{
    public class UriUtils
    {
        public static Uri Combine(Uri baseUri, Uri relativeUri)
        {
            if (baseUri.AbsoluteUri.LastIndexOf('/') != baseUri.AbsoluteUri.Length - 1)
            {
                baseUri =  new Uri(baseUri.AbsoluteUri.Substring(baseUri.AbsoluteUri.LastIndexOf('/')));
            }

            Uri combinedUri = new Uri(baseUri, relativeUri);

            return combinedUri;
        }

        public static string Combine(string baseUri, string relativeUri)
        {
            if (baseUri.LastIndexOf('/') >= 0 && baseUri.LastIndexOf('/') != baseUri.Length - 1)
            {
                baseUri = StringUtils.Left(baseUri, baseUri.LastIndexOf('/') - 1);
            }

            if (!relativeUri.StartsWith("/", StringComparison.InvariantCultureIgnoreCase))
            {
                relativeUri = "/" + relativeUri;
            }

            string combinedUri = baseUri + relativeUri;

            if (!combinedUri.StartsWith("http"))
            {
                combinedUri = "http://" + combinedUri;
            }

            return combinedUri;
        }
    }
}