using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Gallery.Util;
using Gallery.Util.Interface;
using Gallery.Util.Model;
using Xamarin.Forms;

namespace Gallery.Sources.Facets
{
    public class GallerySource : GallerySourceBase
    {
        public override string Name => "FACETS";
        public override string Route => "facets";
        public override string FlyoutIconKey => "Facets";
        public override string HomePage => "http://www.facets.la";

        public override async Task<IEnumerable<GalleryItem>> GetRecentItemsAsync(int page)
        {
            var offset = (page - 1) * 63;
            var url = $"http://www.facets.la/offset/{offset}/";
            var (result, error) = await NetHelper.RequestObject(url, @return: content => ResolveGalleryItems(content));

            if (result == null || !string.IsNullOrEmpty(error))
            {
                Log.Error("facets.content.load", $"failed to load content array, error: {error}");
                return null;
            }

            return result;
        }

        private GalleryItem[] ResolveGalleryItems(string content)
        {
            var regex = new Regex(
                @"<div id=""piece-(\d+?)""(.|\n)+?<img src=""([^""]+?)"".+?width=""(\d+?)""(.|\n)+?<span [^>]+?>([^<]+?)</span>",
                RegexOptions.Multiline);
            var matches = regex.Matches(content);
            var items = new GalleryItem[matches.Count];
            for (var i = 0; i < items.Length; i++)
            {
                var g = matches[i].Groups;
                items[i] = new GalleryItem(int.Parse(g[1].Value))
                {
                    Tags = new[] { g[6].Value },
                    //Width = int.Parse(g[4].Value),
                    Source = Route,
                    RawUrl = g[3].Value,
                    PreviewUrl = g[3].Value
                };
            }
            return items;
        }

        public override void InitDynamicResources(string family, ResourceDictionary light, ResourceDictionary dark)
        {
            var icon = new FontImageSource
            {
                FontFamily = family,
                Glyph = "\uf302",
                Size = 18.0
            };
            light.Add(FlyoutIconKey, icon);
            dark.Add(FlyoutIconKey, icon);
        }

        public override void SetCookie()
        {
            throw new NotImplementedException();
        }
    }
}