using System.Collections.Generic;
using System.Linq;
using SharpRss.Models;
using SharpRss.Services;

namespace SharpRss.Core
{
    public class FeedCache
    {
        public FeedCache()
        {
            FetchFeeds();
        }
        private readonly SyndicationService _syndicationService = new SyndicationService();
        private Dictionary<string, FeedModel> _cachedFeeds = new Dictionary<string, FeedModel>();

        private async void FetchFeeds()
        {
            HashSet<FeedModel> fetchedFeeds = await _syndicationService.GetFeedsAsync();
            _cachedFeeds = fetchedFeeds.ToDictionary(x => x.EncodedUrl);
        }

        public FeedModel? CacheFeed(string encodedUrl) => _cachedFeeds.TryGetValue(encodedUrl, out FeedModel model) ? model : null;
        
    }
}