using System.IO;
using System.Linq;
using System.Threading.Tasks;
using MoreLinq;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using Sony.Filtr.Buzz;
using Sony.Filtr.Contracts.Definitions;
using Sony.Filtr.Core.EditorialPlaylists;

namespace Sony.Filtr.Worker.Onetime
{
    public class AllPlaylistsJsonExport
    {
        private readonly EditorialPlaylistManager _editorialPlaylistManager;
        private readonly BuzzAccountManager _buzzAccountManager;

        public AllPlaylistsJsonExport(EditorialPlaylistManager editorialPlaylistManager, BuzzAccountManager buzzAccountManager)
        {
            _editorialPlaylistManager = editorialPlaylistManager;
            _buzzAccountManager = buzzAccountManager;
        }

        public async Task ExecuteAsync()
        {
            var playlists = await _editorialPlaylistManager.GetEditorialPlaylistsAsync(null, onlySony: false, onlyActive: false, lightWeight: true);
            var playlistViewModels = playlists.DistinctBy(p=> p.SpotifyLink).Select(p => new CustomPlaylistViewModel()
            {
                Uri = p.SpotifyLinkUri,
                PlaylistDisplayName = p.Name
            });

            //Console.WriteLine("Writing a total of {0} playlists", allPlaylists.Count);

            await SaveJsonAsync(playlistViewModels, "AllPlaylistExport.json");

            var allBuzzUsers = await _buzzAccountManager.GetBuzzUsersAsync();
            var buzzCategories = _buzzAccountManager.GetBuzzCategories();
            var buzzCategoryName = buzzCategories.ToDictionary(k => k.ID, v => v.Name);

            var buzzUserViewModel = allBuzzUsers.Where(b => b.ServiceType == ServiceType.Spotify)
                .Select(b => 
                new { Username = b.Username,
                    DisplayName = b.DisplayName,
                    BuzzCategory = b.BuzzCategoryId.HasValue ? buzzCategoryName[b.BuzzCategoryId.Value] : null,
                    Country = b.CountryCode }
                ).ToList();
            await SaveJsonAsync(buzzUserViewModel, "AllBuzzUsers.json");
        }

        private static async Task SaveJsonAsync(object playlistViewModels, string filename)
        {
            var json = JsonConvert.SerializeObject(playlistViewModels, new JsonSerializerSettings()
            {
                ContractResolver = new CamelCasePropertyNamesContractResolver(),
                Formatting = Formatting.Indented
            });

            using(var saveFile = File.Open(filename, FileMode.OpenOrCreate))
            {
                using(var fileWriter = new StreamWriter(saveFile))
                {
                    await fileWriter.WriteAsync(json);
                }
            }
        }

        public class CustomPlaylistViewModel
        {
            public string Uri { get; set; }

            public string PlaylistDisplayName { get; set; }
        }
    }
}