using HtmlAgilityPack;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Beam.Dynamic {
    public class AnchorDataProvider : IDataProvider<SourceLink>, IDataProvider<string> {
        public IBinding? Content { get; set; }

        public string Get(HtmlDocument document) {
            if (Content is null)
                return "";

            return Content.Select(document)?.GetAttributeValue("href", "") ?? "";

        }

        SourceLink IDataProvider<SourceLink>.Get(HtmlDocument document) {
            var content = Get(document);
            if (content is null)
                return SourceLink.InvalidLink;

            if (!Uri.TryCreate(content, UriKind.RelativeOrAbsolute, out _))
                return SourceLink.InvalidLink;

            return new SourceLink(content);
        }
    }
}