using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel.Syndication;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace WebApp.Modules
{
    class ReadFeeds
    {
        private Requests requests = new Requests();

        private List<string> LoadRssFeed()
        {
            List<string> rssFeedUrlList = new List<string>();
            var mainPage = requests.HtmlLoad("https://vnexpress.net/rss");
            foreach(var item in mainPage.DocumentNode.SelectNodes("/html/body/section[4]/div/div/ul/li"))
            {
                rssFeedUrlList.Add(item.SelectSingleNode("a").Attributes["href"].Value);
            }
            return rssFeedUrlList;
        }

        public Dictionary<string, string> GetCovid19Info()
        {
            string data = requests.Get("https://api.covid19api.com/summary");
            var json = JObject.Parse(data);
            Dictionary<string, string> covid19Info = new Dictionary<string, string>();
            covid19Info.Add("WorldTotalRecovered", json["Global"]["TotalRecovered"].ToString());
            covid19Info.Add("WorldTotalConfirmed", json["Global"]["TotalConfirmed"].ToString());
            covid19Info.Add("WorldTotalDeaths", json["Global"]["TotalDeaths"].ToString());
            foreach (var country in JsonConvert.DeserializeObject<JObject>(data)["Countries"])
            {
                if(country["Country"].ToString() == "Viet Nam")
                {
                    covid19Info.Add("VietnamTotalConfirmed", country["TotalConfirmed"].ToString());
                    covid19Info.Add("VietnamTotalDeaths", country["TotalDeaths"].ToString());
                    covid19Info.Add("VietnamTotalRecovered", country["TotalRecovered"].ToString());
                }
            }
            return covid19Info;
        }

        public List<string> ReadRssFeed()
        {
            List<string> feedTitle = new List<string>();
            foreach (var url in LoadRssFeed())
            {
                XmlReader reader = XmlReader.Create("https://vnexpress.net" + url);
                SyndicationFeed feed = SyndicationFeed.Load(reader);
                reader.Close();
                foreach (SyndicationItem item in feed.Items)
                {
                    feedTitle.Add(item.Title.Text);
                }
            }
            return feedTitle;
        }
    }
}