using System.Text.RegularExpressions;
using System.Web;

namespace atakanozbancom.Models.classes
{
    public static class DescriptionFormatter
    {
        private static readonly Regex LinkPattern = new Regex(
            @"\[([^\]\r\n]{1,200})\]\((https?://[^\s)]{1,2000})\)",
            RegexOptions.Compiled | RegexOptions.IgnoreCase);

        public static string ToSafeHtml(string raw)
        {
            if (string.IsNullOrWhiteSpace(raw))
                return string.Empty;

            var encoded = HttpUtility.HtmlEncode(raw);

            var withLinks = LinkPattern.Replace(encoded, m =>
            {
                var label = m.Groups[1].Value;
                var url = m.Groups[2].Value;
                return $"<a href=\"{url}\" class=\"text-secondary text-decoration-none\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">{label}</a>";
            });

            var withBreaks = withLinks
                .Replace("\r\n", "\n")
                .Replace("\n", "<br />");

            return withBreaks;
        }
    }
}