using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using Lastfm;
using Lastfm.Services;

namespace Lastfm.Services
{
    public class Chart : Base
    {
        public Chart(Session session) : base(session)
        {
        }

        public IEnumerable<Artist> GetHypedArtists(int page = 1, int limit = -1)
        {
            RequestParameters parameters = this.getParams();
            parameters["page"] = page.ToString();
            if (limit > 0)
            {
                parameters["limit"] = limit.ToString();
            }
            XmlDocument document = base.request("chart.getHypedArtists", parameters);
            List<Artist> list = new List<Artist>();
            foreach (XmlNode node in document.GetElementsByTagName("artist"))
            {
                Artist item = new Artist(node, base.Session);
                list.Add(item);
            }
            return list;
        }

        internal override RequestParameters getParams()
        {
            return new RequestParameters();
        }

        public IEnumerable<TopArtist> GetTopArtists(int page = 1, int limit = -1)
        {
            RequestParameters parameters = this.getParams();
            parameters["page"] = page.ToString();
            if (limit > 0)
            {
                parameters["limit"] = limit.ToString();
            }
            XmlDocument document = base.request("chart.getTopArtists", parameters);
            List<TopArtist> list = new List<TopArtist>();
            foreach (XmlNode node in document.GetElementsByTagName("artist"))
            {
                Artist artist = new Artist(node, base.Session);
                int playcount = int.Parse(base.extract(node, "playcount"));
                list.Add(new TopArtist(artist, playcount));
            }
            return list;
        }
    }
}