using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Sony.Filtr.Applications;
using Sony.Filtr.Core.EditorialPlaylists;
using Sony.Filtr.Utility.ConsoleUtility;
using Sony.Filtr.Utility.Extensions;

namespace Sony.Filtr.Worker.Onetime
{
    public class RemoveDuplicatePlaylists
    {
        private readonly EditorialPlaylistManager _editorialPlaylistManager;
        private readonly ApplicationInstanceManager _applicationInstanceManager;

        public RemoveDuplicatePlaylists(EditorialPlaylistManager editorialPlaylistManager, ApplicationInstanceManager applicationInstanceManager)
        {
            _editorialPlaylistManager = editorialPlaylistManager;
            _applicationInstanceManager = applicationInstanceManager;
        }

        public async Task ExecuteAsync()
        {
            var allPlaylists = await _editorialPlaylistManager.GetEditorialPlaylistsAsync(null, onlyActive: false, lightWeight: true);

            var duplicates = allPlaylists.GroupBy(g => g.SpotifyLink.Uri + "|" + g.ApplicationID).Where(g => g.Count() > 1).ToList();
            using(var progress = new ConsoleProgressBarCount(duplicates.Count()))
            {
                await duplicates.ForEachAsync(10, async duplicateGroup =>
                {
                    var playlists = duplicateGroup.OrderBy(p => p.ID).ToList();

                    //var playlistToLeave = playlists.First();
                    //Console.WriteLine("Would leave: " + playlistToLeave.Name + " " + playlistToLeave.ID);
                    foreach (var editorialPlaylist in playlists.Skip(1))
                    {
                        //Console.WriteLine("Would remove: " + editorialPlaylist.Name + " " + editorialPlaylist.ID);
                        await _editorialPlaylistManager.DeleteEditorialPlaylistAsync(editorialPlaylist);
                    }
                }, progress);
            }

            Console.WriteLine("Clearing caches");
            var apps = _applicationInstanceManager.GetApplications();
            foreach(var application in apps)
            {
                _editorialPlaylistManager.ClearCache(application.ID);
            }
            

            Console.WriteLine("All done");
            Console.ReadLine();
        }
    }
}