using System.Collections.Generic;
using System.Threading.Tasks;
using SharpRss.Models;

namespace SharpRss.Services
{
    /// <summary>
    /// Managing RSS feeds and categories.
    /// </summary>
    public class RssService
    {
        public RssService()
        {
            _dbService = new DatabaseService();
            Initialize();
        }
        private readonly DatabaseService _dbService;

        private async void Initialize()
        {
            //HashSet<CategoryModel> categoryModels = await _dbService.GetCategoriesAsync();
        }

        public async Task<HashSet<object>> GetAllAsync()
        {
            HashSet<object> items = new HashSet<object>();
            return items;
        }

        public async Task<HashSet<CategoryModel>> GetCategoriesAsync()
        {
            return new HashSet<CategoryModel>();
        }

        public async Task<HashSet<FeedModel>> GetFeedsAsync(CategoryModel? categoryModel = null)
        {
            HashSet<FeedModel> feeds = new HashSet<FeedModel>();
            if (categoryModel != null)
            {
                // Get feeds from the category.
            }
            else
            {
                // Get all the feeds.
            }
            return feeds;
        }

        public async void AddCategoryAsync(string name)
        {
        }

        public async void AddFeedAsync(string rssUrl)
        {
        }

        /*private static HashSet<FeedModel> feedSet = new HashSet<FeedModel>()
        {
            new FeedModel("http://fedoramagazine.org/feed/"),
            new FeedModel("https://www.nasa.gov/rss/dyn/breaking_news.rss"),
        };
        private static HashSet<FeedModel> feedSet2 = new HashSet<FeedModel>()
        {
            new FeedModel("https://journals.plos.org/plosone/feed/atom"),
            new FeedModel("https://itsfoss.com/feed")
        };*/
        
        /*HashSet<CategoryModel> set = new HashSet<CategoryModel>()
        {
            new CategoryModel("RSS", feedSet),
            new CategoryModel("Tech", feedSet2)
        };*/
    }
}