using Microsoft.AspNetCore.SignalR;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using Roadie.Api.Hubs;
using Roadie.Library;
using Roadie.Library.Caching;
using Roadie.Library.Configuration;
using Roadie.Library.Encoding;
using Roadie.Library.Models;
using Roadie.Library.Models.Pagination;
using Roadie.Library.Models.Users;
using Roadie.Library.Scrobble;
using Roadie.Library.Utility;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Dynamic.Core;
using System.Threading.Tasks;
using data = Roadie.Library.Data;

namespace Roadie.Api.Services
{
    public class PlayActivityService : ServiceBase, IPlayActivityService
    {
        protected IHubContext<PlayActivityHub> PlayActivityHub { get; }

        protected IScrobbleHandler ScrobblerHandler { get; }

        public PlayActivityService(IRoadieSettings configuration, IHttpEncoder httpEncoder,IHttpContext httpContext,
                                   data.IRoadieDbContext dbContext, ICacheManager cacheManager,ILogger<PlayActivityService> logger,
                                   IScrobbleHandler scrobbleHandler, IHubContext<PlayActivityHub> playActivityHub)
            : base(configuration, httpEncoder, dbContext, cacheManager, logger, httpContext)
        {
            PlayActivityHub = playActivityHub;
            ScrobblerHandler = scrobbleHandler;
        }

        public PlayActivityService(IRoadieSettings configuration, data.IRoadieDbContext dbContext, ICacheManager cacheManager, 
                                   ILogger logger, ScrobbleHandler scrobbleHandler)
            : base(configuration, null, dbContext, cacheManager, logger, null)
        {
            ScrobblerHandler = scrobbleHandler;
        }

        public Task<Library.Models.Pagination.PagedResult<PlayActivityList>> List(PagedRequest request,User roadieUser = null, DateTime? newerThan = null)
        {
            try
            {
                var sw = new Stopwatch();
                sw.Start();

                var result = from t in DbContext.Tracks
                             join rm in DbContext.ReleaseMedias on t.ReleaseMediaId equals rm.Id
                             join r in DbContext.Releases on rm.ReleaseId equals r.Id
                             join trackArtist in DbContext.Artists on t.ArtistId equals trackArtist.Id into tas
                             from trackArtist in tas.DefaultIfEmpty()
                             join usertrack in DbContext.UserTracks on t.Id equals usertrack.TrackId
                             join u in DbContext.Users on usertrack.UserId equals u.Id
                             join releaseArtist in DbContext.Artists on r.ArtistId equals releaseArtist.Id
                             where newerThan == null || usertrack.LastPlayed >= newerThan
                             where roadieUser == null && !(u.IsPrivate ?? false) || roadieUser != null && usertrack != null &&
                                   usertrack.User.Id == roadieUser.Id
                             where !request.FilterRatedOnly || roadieUser == null && t.Rating > 0 ||
                                   roadieUser != null && usertrack.Rating > 0
                             where request.FilterValue.Length == 0 || request.FilterValue.Length > 0 && (
                                       t.Title != null && t.Title.Contains(request.Filter, StringComparison.OrdinalIgnoreCase) ||
                                       t.AlternateNames != null && t.AlternateNames.Contains(request.Filter, StringComparison.OrdinalIgnoreCase))
                             select new PlayActivityList
                             {
                                 Release = new DataToken
                                 {
                                     Text = r.Title,
                                     Value = r.RoadieId.ToString()
                                 },
                                 Track = TrackList.FromDataTrack(null,
                                     t,
                                     rm.MediaNumber,
                                     r,
                                     releaseArtist,
                                     trackArtist,
                                     HttpContext.BaseUrl,
                                     MakeTrackThumbnailImage(Configuration, HttpContext, t.RoadieId),
                                     MakeReleaseThumbnailImage(Configuration, HttpContext, r.RoadieId),
                                     MakeArtistThumbnailImage(Configuration, HttpContext, releaseArtist.RoadieId),
                                     MakeArtistThumbnailImage(Configuration, HttpContext, trackArtist == null ? null : (Guid?)trackArtist.RoadieId)),
                                 User = new DataToken
                                 {
                                     Text = u.UserName,
                                     Value = u.RoadieId.ToString()
                                 },
                                 Artist = new DataToken
                                 {
                                     Text = releaseArtist.Name,
                                     Value = releaseArtist.RoadieId.ToString()
                                 },
                                 TrackArtist = trackArtist == null
                                     ? null
                                     : new DataToken
                                     {
                                         Text = trackArtist.Name,
                                         Value = trackArtist.RoadieId.ToString()
                                     },
                                 PlayedDateDateTime = usertrack.LastPlayed,
                                 ReleasePlayUrl = $"{HttpContext.BaseUrl}/play/release/{r.RoadieId}",
                                 Rating = t.Rating,
                                 UserRating = usertrack.Rating,
                                 TrackPlayUrl = $"{HttpContext.BaseUrl}/play/track/{t.RoadieId}.mp3",
                                 ArtistThumbnail =
                                     MakeArtistThumbnailImage(Configuration, HttpContext,
                                         trackArtist != null ? trackArtist.RoadieId : releaseArtist.RoadieId),
                                 ReleaseThumbnail = MakeReleaseThumbnailImage(Configuration, HttpContext, r.RoadieId),
                                 UserThumbnail = MakeUserThumbnailImage(Configuration, HttpContext, u.RoadieId)
                             };

                var sortBy = string.IsNullOrEmpty(request.Sort)
                    ? request.OrderValue(new Dictionary<string, string> { { "PlayedDateDateTime", "DESC" } })
                    : request.OrderValue();
                var rowCount = result.Count();
                var rows = result.OrderBy(sortBy).Skip(request.SkipValue).Take(request.LimitValue).ToArray();
                sw.Stop();
                return Task.FromResult(new Library.Models.Pagination.PagedResult<PlayActivityList>
                {
                    TotalCount = rowCount,
                    CurrentPage = request.PageValue,
                    TotalPages = (int)Math.Ceiling((double)rowCount / request.LimitValue),
                    OperationTime = sw.ElapsedMilliseconds,
                    Rows = rows
                });
            }
            catch (Exception ex)
            {
                Logger.LogError(ex);
            }

            return Task.FromResult(new Library.Models.Pagination.PagedResult<PlayActivityList>());
        }

        public async Task<OperationResult<bool>> NowPlaying(User roadieUser, ScrobbleInfo scrobble)
        {
            var scrobbleResult = await ScrobblerHandler.NowPlaying(roadieUser, scrobble);
            if (!scrobbleResult.IsSuccess) return scrobbleResult;
            await PublishPlayActivity(roadieUser, scrobble, true);
            return scrobbleResult;
        }

        public async Task<OperationResult<bool>> Scrobble(User roadieUser, ScrobbleInfo scrobble)
        {
            var scrobbleResult = await ScrobblerHandler.Scrobble(roadieUser, scrobble);
            if (!scrobbleResult.IsSuccess)
            {
                return scrobbleResult;
            }
            await PublishPlayActivity(roadieUser, scrobble, false);
            return scrobbleResult;
        }

        private async Task PublishPlayActivity(User roadieUser, ScrobbleInfo scrobble, bool isNowPlaying)
        {
            // Only broadcast if the user is not public and played duration is more than half of duration
            if (roadieUser?.IsPrivate != true && 
                scrobble.ElapsedTimeOfTrackPlayed.TotalSeconds > scrobble.TrackDuration.TotalSeconds / 2)
            {
                var sw = Stopwatch.StartNew();
                var track = DbContext.Tracks
                    .Include(x => x.ReleaseMedia)
                    .Include(x => x.ReleaseMedia.Release)
                    .Include(x => x.ReleaseMedia.Release.Artist)
                    .Include(x => x.TrackArtist)
                    .FirstOrDefault(x => x.RoadieId == scrobble.TrackId);
                var user = DbContext.Users.FirstOrDefault(x => x.RoadieId == roadieUser.UserId);
                var userTrack =
                    DbContext.UserTracks.FirstOrDefault(x => x.UserId == roadieUser.Id && x.TrackId == track.Id);
                var pl = new PlayActivityList
                {
                    Artist = new DataToken
                    {
                        Text = track.ReleaseMedia.Release.Artist.Name,
                        Value = track.ReleaseMedia.Release.Artist.RoadieId.ToString()
                    },
                    TrackArtist = track.TrackArtist == null
                        ? null
                        : new DataToken
                        {
                            Text = track.TrackArtist.Name,
                            Value = track.TrackArtist.RoadieId.ToString()
                        },
                    Release = new DataToken
                    {
                        Text = track.ReleaseMedia.Release.Title,
                        Value = track.ReleaseMedia.Release.RoadieId.ToString()
                    },
                    Track = TrackList.FromDataTrack(null,
                        track,
                        track.ReleaseMedia.MediaNumber,
                        track.ReleaseMedia.Release,
                        track.ReleaseMedia.Release.Artist,
                        track.TrackArtist,
                        HttpContext.BaseUrl,
                        MakeTrackThumbnailImage(Configuration, HttpContext, track.RoadieId),
                        MakeReleaseThumbnailImage(Configuration, HttpContext, track.ReleaseMedia.Release.RoadieId),
                        MakeArtistThumbnailImage(Configuration, HttpContext, track.ReleaseMedia.Release.Artist.RoadieId),
                        MakeArtistThumbnailImage(Configuration, HttpContext, track.TrackArtist == null
                            ? null
                            : (Guid?)track.TrackArtist.RoadieId)),
                    User = new DataToken
                    {
                        Text = roadieUser.UserName,
                        Value = roadieUser.UserId.ToString()
                    },
                    ArtistThumbnail = MakeArtistThumbnailImage(Configuration, HttpContext, track.TrackArtist != null
                        ? track.TrackArtist.RoadieId
                        : track.ReleaseMedia.Release.Artist.RoadieId),
                    PlayedDateDateTime = scrobble.TimePlayed,
                    IsNowPlaying = isNowPlaying,
                    Rating = track.Rating,
                    ReleasePlayUrl = $"{HttpContext.BaseUrl}/play/release/{track.ReleaseMedia.Release.RoadieId}",
                    ReleaseThumbnail = MakeReleaseThumbnailImage(Configuration, HttpContext, track.ReleaseMedia.Release.RoadieId),
                    TrackPlayUrl = $"{HttpContext.BaseUrl}/play/track/{track.RoadieId}.mp3",
                    UserRating = userTrack?.Rating,
                    UserThumbnail = MakeUserThumbnailImage(Configuration, HttpContext, roadieUser.UserId)
                };
                try
                {
                    await PlayActivityHub.Clients.All.SendAsync("SendActivity", pl);
                }
                catch (Exception ex)
                {
                    Logger.LogError(ex);
                }
            }
        }
    }
}