using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Configuration;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.Net;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;

namespace MediaBrowser.Controller.Providers.Movies
{
    class MovieDbProviderException : ApplicationException
    {
        public MovieDbProviderException(string msg)
            : base(msg)
        {
        }

    }
    /// <summary>
    /// Class MovieDbProvider
    /// </summary>
    public class MovieDbProvider : BaseMetadataProvider, IDisposable
    {
        protected static CultureInfo EnUs = new CultureInfo("en-US");

        protected readonly IProviderManager ProviderManager;

        /// <summary>
        /// The movie db
        /// </summary>
        private readonly SemaphoreSlim _movieDbResourcePool = new SemaphoreSlim(1,1);

        internal static MovieDbProvider Current { get; private set; }

        /// <summary>
        /// Gets the json serializer.
        /// </summary>
        /// <value>The json serializer.</value>
        protected IJsonSerializer JsonSerializer { get; private set; }

        /// <summary>
        /// Gets the HTTP client.
        /// </summary>
        /// <value>The HTTP client.</value>
        protected IHttpClient HttpClient { get; private set; }

        /// <summary>
        /// Initializes a new instance of the <see cref="MovieDbProvider" /> class.
        /// </summary>
        /// <param name="logManager">The log manager.</param>
        /// <param name="configurationManager">The configuration manager.</param>
        /// <param name="jsonSerializer">The json serializer.</param>
        /// <param name="httpClient">The HTTP client.</param>
        /// <param name="providerManager">The provider manager.</param>
        public MovieDbProvider(ILogManager logManager, IServerConfigurationManager configurationManager, IJsonSerializer jsonSerializer, IHttpClient httpClient, IProviderManager providerManager)
            : base(logManager, configurationManager)
        {
            JsonSerializer = jsonSerializer;
            HttpClient = httpClient;
            ProviderManager = providerManager;
            Current = this;
        }

        /// <summary>
        /// Releases unmanaged and - optionally - managed resources.
        /// </summary>
        /// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
        protected virtual void Dispose(bool dispose)
        {
            if (dispose)
            {
                _movieDbResourcePool.Dispose();
            }
        }

        /// <summary>
        /// Gets the priority.
        /// </summary>
        /// <value>The priority.</value>
        public override MetadataProviderPriority Priority
        {
            get { return MetadataProviderPriority.Second; }
        }

        /// <summary>
        /// Supportses the specified item.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns>
        public override bool Supports(BaseItem item)
        {
            var trailer = item as Trailer;

            if (trailer != null)
            {
                return !trailer.IsLocalTrailer;
            }

            // Don't support local trailers
            return item is Movie || item is BoxSet;
        }

        /// <summary>
        /// Gets a value indicating whether [requires internet].
        /// </summary>
        /// <value><c>true</c> if [requires internet]; otherwise, <c>false</c>.</value>
        public override bool RequiresInternet
        {
            get
            {
                return true;
            }
        }

        /// <summary>
        /// If we save locally, refresh if they delete something
        /// </summary>
        protected override bool RefreshOnFileSystemStampChange
        {
            get
            {
                return ConfigurationManager.Configuration.SaveLocalMeta;
            }
        }

        protected override bool RefreshOnVersionChange
        {
            get
            {
                return true;
            }
        }

        protected override string ProviderVersion
        {
            get
            {
                return "2";
            }
        }

        /// <summary>
        /// The _TMDB settings task
        /// </summary>
        private Task<TmdbSettingsResult> _tmdbSettingsTask;
        /// <summary>
        /// The _TMDB settings task initialized
        /// </summary>
        private bool _tmdbSettingsTaskInitialized;
        /// <summary>
        /// The _TMDB settings task sync lock
        /// </summary>
        private object _tmdbSettingsTaskSyncLock = new object();

        /// <summary>
        /// Gets the TMDB settings.
        /// </summary>
        /// <value>The TMDB settings.</value>
        public Task<TmdbSettingsResult> TmdbSettings
        {
            get
            {
                LazyInitializer.EnsureInitialized(ref _tmdbSettingsTask, ref _tmdbSettingsTaskInitialized, ref _tmdbSettingsTaskSyncLock, () => GetTmdbSettings(JsonSerializer));
                return _tmdbSettingsTask;
            }
        }

        /// <summary>
        /// Gets the TMDB settings.
        /// </summary>
        /// <returns>Task{TmdbSettingsResult}.</returns>
        private async Task<TmdbSettingsResult> GetTmdbSettings(IJsonSerializer jsonSerializer)
        {
            try
            {
                using (var json = await GetMovieDbResponse(new HttpRequestOptions
                {
                    Url = string.Format(TmdbConfigUrl, ApiKey),
                    CancellationToken = CancellationToken.None,
                    AcceptHeader = AcceptHeader,
                    EnableResponseCache = true

                }).ConfigureAwait(false))
                {
                    return jsonSerializer.DeserializeFromStream<TmdbSettingsResult>(json);
                }
            }
            catch (HttpException)
            {
                return new TmdbSettingsResult
                {
                    images = new TmdbImageSettings
                    {
                        backdrop_sizes =
                            new List<string>
                                                                                                     {
                                                                                                         "w380",
                                                                                                         "w780",
                                                                                                         "w1280",
                                                                                                         "original"
                                                                                                     },
                        poster_sizes =
                            new List<string>
                                                                                                     {
                                                                                                         "w92",
                                                                                                         "w154",
                                                                                                         "w185",
                                                                                                         "w342",
                                                                                                         "w500",
                                                                                                         "original"
                                                                                                     },
                        profile_sizes =
                            new List<string>
                                                                                                     {
                                                                                                         "w45",
                                                                                                         "w185",
                                                                                                         "h632",
                                                                                                         "original"
                                                                                                     },
                        base_url = "http://cf2.imgobject.com/t/p/"

                    }
                };
            }
        }

        /// <summary>
        /// The json provider
        /// </summary>
        protected MovieProviderFromJson JsonProvider;

        /// <summary>
        /// Sets the persisted last refresh date on the item for this provider.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="value">The value.</param>
        /// <param name="providerVersion">The provider version.</param>
        /// <param name="status">The status.</param>
        public override void SetLastRefreshed(BaseItem item, DateTime value, string providerVersion, ProviderRefreshStatus status = ProviderRefreshStatus.Success)
        {
            base.SetLastRefreshed(item, value, providerVersion, status);

            if (ConfigurationManager.Configuration.SaveLocalMeta && item.LocationType == LocationType.FileSystem)
            {
                //in addition to ours, we need to set the last refreshed time for the local data provider
                //so it won't see the new files we download and process them all over again
                if (JsonProvider == null) JsonProvider = new MovieProviderFromJson(LogManager, ConfigurationManager, JsonSerializer, HttpClient, ProviderManager);

                BaseProviderInfo data;

                if (!item.ProviderData.TryGetValue(JsonProvider.Id, out data))
                {
                    data = new BaseProviderInfo();
                }

                data.LastRefreshed = value;
                item.ProviderData[JsonProvider.Id] = data;
            }
        }

        private const string TmdbConfigUrl = "http://api.themoviedb.org/3/configuration?api_key={0}";
        private const string Search3 = @"http://api.themoviedb.org/3/search/movie?api_key={1}&query={0}&language={2}";
        private const string AltTitleSearch = @"http://api.themoviedb.org/3/movie/{0}/alternative_titles?api_key={1}&country={2}";
        private const string GetMovieInfo3 = @"http://api.themoviedb.org/3/movie/{0}?api_key={1}&language={2}&append_to_response=casts,releases,images,keywords";
        private const string GetBoxSetInfo3 = @"http://api.themoviedb.org/3/collection/{0}?api_key={1}&language={2}&append_to_response=images";

        internal static string ApiKey = "f6bd687ffa63cd282b6ff2c6877f2669";
        internal static string AcceptHeader = "application/json,image/*";

        static readonly Regex[] NameMatches = new[] {
            new Regex(@"(?<name>.*)\((?<year>\d{4})\)"), // matches "My Movie (2001)" and gives us the name and the year
            new Regex(@"(?<name>.*)") // last resort matches the whole string as the name
        };

        public const string LOCAL_META_FILE_NAME = "tmdb3.json";
        public const string ALT_META_FILE_NAME = "movie.xml";

        protected override bool NeedsRefreshInternal(BaseItem item, BaseProviderInfo providerInfo)
        {
            if (item.DontFetchMeta) return false;

            if (item.LocationType == LocationType.FileSystem &&
                ConfigurationManager.Configuration.SaveLocalMeta && 
                HasFileSystemStampChanged(item, providerInfo))
            {
                //If they deleted something from file system, chances are, this item was mis-identified the first time
                item.SetProviderId(MetadataProviders.Tmdb, null);
                Logger.Debug("MovieProvider reports file system stamp change...");
                return true;

            }

            if (providerInfo.LastRefreshStatus != ProviderRefreshStatus.Success)
            {
                Logger.Debug("MovieProvider for {0} - last attempt had errors.  Will try again.", item.Path);
                return true;
            }

            if (RefreshOnVersionChange && !String.Equals(ProviderVersion, providerInfo.ProviderVersion))
            {
                return true;
            }
            
            var downloadDate = providerInfo.LastRefreshed;

            if (ConfigurationManager.Configuration.MetadataRefreshDays == -1 && downloadDate != DateTime.MinValue)
            {
                return false;
            }

            if (DateTime.Today.Subtract(downloadDate).TotalDays < ConfigurationManager.Configuration.MetadataRefreshDays) // only refresh every n days
                return false;

            if (HasAltMeta(item))
                return false; //never refresh if has meta from other source

            return true;
        }

        /// <summary>
        /// Fetches metadata and returns true or false indicating if any work that requires persistence was done
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="force">if set to <c>true</c> [force].</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task{System.Boolean}.</returns>
        public override async Task<bool> FetchAsync(BaseItem item, bool force, CancellationToken cancellationToken)
        {
            if (HasAltMeta(item))
            {
                Logger.Info("MovieDbProvider - Not fetching because 3rd party meta exists for " + item.Name);
                SetLastRefreshed(item, DateTime.UtcNow);
                return true;
            }
            if (item.DontFetchMeta)
            {
                Logger.Info("MovieDbProvider - Not fetching because requested to ignore " + item.Name);
                return false;
            }

            cancellationToken.ThrowIfCancellationRequested();

            if (!ConfigurationManager.Configuration.SaveLocalMeta || !HasLocalMeta(item) || (force && !HasLocalMeta(item)))
            {
                try
                {
                    await FetchMovieData(item, cancellationToken).ConfigureAwait(false);
                    SetLastRefreshed(item, DateTime.UtcNow);
                }
                catch (MovieDbProviderException)
                {
                    SetLastRefreshed(item, DateTime.UtcNow, ProviderRefreshStatus.CompletedWithErrors);
                }

                return true;
            }
            Logger.Debug("MovieDBProvider not fetching because local meta exists for " + item.Name);
            SetLastRefreshed(item, DateTime.UtcNow);
            return true;
        }

        /// <summary>
        /// Determines whether [has local meta] [the specified item].
        /// </summary>
        /// <param name="item">The item.</param>
        /// <returns><c>true</c> if [has local meta] [the specified item]; otherwise, <c>false</c>.</returns>
        private bool HasLocalMeta(BaseItem item)
        {
            //need at least the xml and folder.jpg/png or a movie.xml put in by someone else
            return item.LocationType == LocationType.FileSystem && item.ResolveArgs.ContainsMetaFileByName(LOCAL_META_FILE_NAME);
        }

        /// <summary>
        /// Determines whether [has alt meta] [the specified item].
        /// </summary>
        /// <param name="item">The item.</param>
        /// <returns><c>true</c> if [has alt meta] [the specified item]; otherwise, <c>false</c>.</returns>
        private bool HasAltMeta(BaseItem item)
        {
            return item.LocationType == LocationType.FileSystem && item.ResolveArgs.ContainsMetaFileByName(ALT_META_FILE_NAME);
        }

        /// <summary>
        /// Fetches the movie data.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="cancellationToken"></param>
        /// <returns>Task.</returns>
        private async Task FetchMovieData(BaseItem item, CancellationToken cancellationToken)
        {
            string id = item.GetProviderId(MetadataProviders.Tmdb) ?? await FindId(item, item.ProductionYear, cancellationToken).ConfigureAwait(false);
            if (id != null)
            {
                Logger.Debug("MovieDbProvider - getting movie info with id: " + id);

                cancellationToken.ThrowIfCancellationRequested();

                await FetchMovieData(item, id, cancellationToken).ConfigureAwait(false);
            }
            else
            {
                Logger.Info("MovieDBProvider could not find " + item.Name + ". Check name on themoviedb.org.");
            }
        }

        /// <summary>
        /// Parses the name.
        /// </summary>
        /// <param name="name">The name.</param>
        /// <param name="justName">Name of the just.</param>
        /// <param name="year">The year.</param>
        protected void ParseName(string name, out string justName, out int? year)
        {
            justName = null;
            year = null;
            foreach (var re in NameMatches)
            {
                Match m = re.Match(name);
                if (m.Success)
                {
                    justName = m.Groups["name"].Value.Trim();
                    string y = m.Groups["year"] != null ? m.Groups["year"].Value : null;
                    int temp;
                    year = Int32.TryParse(y, out temp) ? temp : (int?)null;
                    break;
                }
            }
        }

        /// <summary>
        /// Finds the id.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="productionYear">The production year.</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task{System.String}.</returns>
        public async Task<string> FindId(BaseItem item, int? productionYear, CancellationToken cancellationToken)
        {
            string id = null;

            if (item.LocationType == LocationType.FileSystem)
            {
                string justName = item.Path != null ? item.Path.Substring(item.Path.LastIndexOf(Path.DirectorySeparatorChar)) : string.Empty;
                id = justName.GetAttributeValue("tmdbid");
                if (id != null)
                {
                    Logger.Debug("Using tmdb id specified in path.");
                    return id;
                }
            }

            int? year;
            string name = item.Name;
            ParseName(name, out name, out year);

            if (year == null && productionYear != null)
            {
                year = productionYear;
            }

            Logger.Info("MovieDbProvider: Finding id for movie: " + name);
            string language = ConfigurationManager.Configuration.PreferredMetadataLanguage.ToLower();

            //if we are a boxset - look at our first child
            var boxset = item as BoxSet;
            if (boxset != null)
            {
                var firstChild = boxset.Children.FirstOrDefault();

                if (firstChild != null)
                {
                    Logger.Debug("MovieDbProvider - Attempting to find boxset ID from: " + firstChild.Name);
                    string childName;
                    int? childYear;
                    ParseName(firstChild.Name, out childName, out childYear);
                    id = await GetBoxsetIdFromMovie(childName, childYear, language, cancellationToken).ConfigureAwait(false);
                    if (id != null)
                    {
                        Logger.Info("MovieDbProvider - Found Boxset ID: " + id);
                    }
                }

                return id;
            }
            //nope - search for it
            id = await AttemptFindId(name, year, language, cancellationToken).ConfigureAwait(false);
            if (id == null)
            {
                //try in english if wasn't before
                if (language != "en")
                {
                    id = await AttemptFindId(name, year, "en", cancellationToken).ConfigureAwait(false);
                }
                else
                {
                    // try with dot and _ turned to space
                    var originalName = name;

                    name = name.Replace(",", " ");
                    name = name.Replace(".", " ");
                    name = name.Replace("_", " ");
                    name = name.Replace("-", "");

                    // Search again if the new name is different
                    if (!string.Equals(name, originalName))
                    {
                        id = await AttemptFindId(name, year, language, cancellationToken).ConfigureAwait(false);

                        if (id == null && language != "en")
                        {
                            //one more time, in english
                            id = await AttemptFindId(name, year, "en", cancellationToken).ConfigureAwait(false);

                        }
                    }

                    if (id == null && item.LocationType == LocationType.FileSystem)
                    {
                        //last resort - try using the actual folder name
                        var pathName = Path.GetFileName(item.ResolveArgs.Path);

                        // Only search if it's a name we haven't already tried.
                        if (!string.Equals(pathName, name, StringComparison.OrdinalIgnoreCase)
                            && !string.Equals(pathName, originalName, StringComparison.OrdinalIgnoreCase))
                        {
                            id = await AttemptFindId(pathName, year, "en", cancellationToken).ConfigureAwait(false);
                        }
                    }
                }
            }

            return id;
        }

        /// <summary>
        /// Attempts the find id.
        /// </summary>
        /// <param name="name">The name.</param>
        /// <param name="year">The year.</param>
        /// <param name="language">The language.</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task{System.String}.</returns>
        public virtual async Task<string> AttemptFindId(string name, int? year, string language, CancellationToken cancellationToken)
        {
            string url3 = string.Format(Search3, UrlEncode(name), ApiKey, language);
            TmdbMovieSearchResults searchResult = null;

            try
            {
                using (Stream json = await GetMovieDbResponse(new HttpRequestOptions
                {
                    Url = url3,
                    CancellationToken = cancellationToken,
                    AcceptHeader = AcceptHeader,
                    EnableResponseCache = true

                }).ConfigureAwait(false))
                {
                    searchResult = JsonSerializer.DeserializeFromStream<TmdbMovieSearchResults>(json);
                }
            }
            catch (HttpException)
            {
            }
            if (searchResult == null || searchResult.results.Count == 0)
            {
                //try replacing numbers
                foreach (var pair in ReplaceStartNumbers)
                {
                    if (name.StartsWith(pair.Key))
                    {
                        name = name.Remove(0, pair.Key.Length);
                        name = pair.Value + name;
                    }
                }
                foreach (var pair in ReplaceEndNumbers)
                {
                    if (name.EndsWith(pair.Key))
                    {
                        name = name.Remove(name.IndexOf(pair.Key), pair.Key.Length);
                        name = name + pair.Value;
                    }
                }
                Logger.Info("MovieDBProvider - No results.  Trying replacement numbers: " + name);
                url3 = string.Format(Search3, UrlEncode(name), ApiKey, language);

                try
                {
                    using (var json = await GetMovieDbResponse(new HttpRequestOptions
                    {
                        Url = url3,
                        CancellationToken = cancellationToken,
                        AcceptHeader = AcceptHeader,
                        EnableResponseCache = true

                    }).ConfigureAwait(false))
                    {
                        searchResult = JsonSerializer.DeserializeFromStream<TmdbMovieSearchResults>(json);
                    }
                }
                catch (HttpException)
                {
                }
            }
            if (searchResult != null)
            {
                string compName = GetComparableName(name, Logger);
                foreach (var possible in searchResult.results)
                {
                    string matchedName = null;
                    string id = possible.id.ToString(CultureInfo.InvariantCulture);
                    string n = possible.title;
                    if (GetComparableName(n, Logger) == compName)
                    {
                        matchedName = n;
                    }
                    else
                    {
                        n = possible.original_title;
                        if (GetComparableName(n, Logger) == compName)
                        {
                            matchedName = n;
                        }
                    }

                    Logger.Debug("MovieDbProvider - " + compName + " didn't match " + n);
                    //if main title matches we don't have to look for alternatives
                    if (matchedName == null)
                    {
                        //that title didn't match - look for alternatives
                        url3 = string.Format(AltTitleSearch, id, ApiKey, ConfigurationManager.Configuration.MetadataCountryCode);

                        try
                        {
                            using (var json = await GetMovieDbResponse(new HttpRequestOptions
                            {
                                Url = url3,
                                CancellationToken = cancellationToken,
                                AcceptHeader = AcceptHeader,
                                EnableResponseCache = true

                            }).ConfigureAwait(false))
                            {
                                var response = JsonSerializer.DeserializeFromStream<TmdbAltTitleResults>(json);

                                if (response != null && response.titles != null)
                                {
                                    foreach (var title in response.titles)
                                    {
                                        var t = GetComparableName(title.title, Logger);
                                        if (t == compName)
                                        {
                                            Logger.Debug("MovieDbProvider - " + compName +
                                                                " matched " + t);
                                            matchedName = t;
                                            break;
                                        }
                                        Logger.Debug("MovieDbProvider - " + compName +
                                                            " did not match " + t);
                                    }
                                }
                            }
                        }
                        catch (HttpException)
                        {
                        }
                    }

                    if (matchedName != null)
                    {
                        Logger.Debug("Match " + matchedName + " for " + name);
                        if (year != null)
                        {
                            DateTime r;

                            //These dates are always in this exact format
                            if (DateTime.TryParseExact(possible.release_date, "yyyy-MM-dd", EnUs, DateTimeStyles.None,  out r))
                            {
                                if (Math.Abs(r.Year - year.Value) > 1) // allow a 1 year tolerance on release date
                                {
                                    Logger.Debug("Result " + matchedName + " released on " + r + " did not match year " + year);
                                    continue;
                                }
                            }
                        }
                        //matched name and year
                        return id;
                    }

                }
            }

            return null;
        }

        /// <summary>
        /// URLs the encode.
        /// </summary>
        /// <param name="name">The name.</param>
        /// <returns>System.String.</returns>
        private static string UrlEncode(string name)
        {
            return WebUtility.UrlEncode(name);
        }

        /// <summary>
        /// Gets the boxset id from movie.
        /// </summary>
        /// <param name="name">The name.</param>
        /// <param name="year">The year.</param>
        /// <param name="language">The language.</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task{System.String}.</returns>
        protected async Task<string> GetBoxsetIdFromMovie(string name, int? year, string language, CancellationToken cancellationToken)
        {
            string id = null;
            string childId = await AttemptFindId(name, year, language, cancellationToken).ConfigureAwait(false);
            if (childId != null)
            {
                string url = string.Format(GetMovieInfo3, childId, ApiKey, language);

                try
                {
                    using (Stream json = await GetMovieDbResponse(new HttpRequestOptions
                    {
                        Url = url,
                        CancellationToken = cancellationToken,
                        AcceptHeader = AcceptHeader,
                        EnableResponseCache = true

                    }).ConfigureAwait(false))
                    {
                        var movieResult = JsonSerializer.DeserializeFromStream<CompleteMovieData>(json);

                        if (movieResult != null && movieResult.belongs_to_collection != null)
                        {
                            id = movieResult.belongs_to_collection.id.ToString(CultureInfo.InvariantCulture);
                        }
                        else
                        {
                            Logger.Error("Unable to obtain boxset id.");
                        }
                    }
                }
                catch (HttpException)
                {
                }
            }
            return id;
        }

        /// <summary>
        /// Fetches the movie data.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="id">The id.</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task.</returns>
        protected async Task FetchMovieData(BaseItem item, string id, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();

            if (String.IsNullOrEmpty(id))
            {
                Logger.Info("MoviedbProvider: Ignoring " + item.Name + " because ID forced blank.");
                return;
            }
            if (item.GetProviderId(MetadataProviders.Tmdb) == null) item.SetProviderId(MetadataProviders.Tmdb, id);

            var mainResult = await FetchMainResult(item, id, cancellationToken).ConfigureAwait(false);

            if (mainResult == null) return;

            ProcessMainInfo(item, mainResult);

            cancellationToken.ThrowIfCancellationRequested();

            //and save locally
            if (ConfigurationManager.Configuration.SaveLocalMeta && item.LocationType == LocationType.FileSystem)
            {
                var ms = new MemoryStream();
                JsonSerializer.SerializeToStream(mainResult, ms);

                cancellationToken.ThrowIfCancellationRequested();

                await ProviderManager.SaveToLibraryFilesystem(item, Path.Combine(item.MetaLocation, LOCAL_META_FILE_NAME), ms, cancellationToken).ConfigureAwait(false);
            }
        }

        /// <summary>
        /// Fetches the main result.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="id">The id.</param>
        /// <param name="cancellationToken">The cancellation token</param>
        /// <returns>Task{CompleteMovieData}.</returns>
        protected async Task<CompleteMovieData> FetchMainResult(BaseItem item, string id, CancellationToken cancellationToken)
        {
            var baseUrl = item is BoxSet ? GetBoxSetInfo3 : GetMovieInfo3;

            string url = string.Format(baseUrl, id, ApiKey, ConfigurationManager.Configuration.PreferredMetadataLanguage);
            CompleteMovieData mainResult;

            cancellationToken.ThrowIfCancellationRequested();

            try
            {
                using (var json = await GetMovieDbResponse(new HttpRequestOptions
                {
                    Url = url,
                    CancellationToken = cancellationToken,
                    AcceptHeader = AcceptHeader,
                    EnableResponseCache = true

                }).ConfigureAwait(false))
                {
                    mainResult = JsonSerializer.DeserializeFromStream<CompleteMovieData>(json);
                }
            }
            catch (HttpException e)
            {
                if (e.IsTimedOut)
                {
                    Logger.ErrorException("MovieDbProvider timed out attempting to retrieve main info for {0}", e, item.Path);
                    throw new MovieDbProviderException("Timed out on main info");
                }
                if (e.StatusCode == HttpStatusCode.NotFound)
                {
                    Logger.ErrorException("MovieDbProvider not found error attempting to retrieve main info for {0}", e, item.Path);
                    throw new MovieDbProviderException("Not Found");
                }

                throw;
            }

            cancellationToken.ThrowIfCancellationRequested();

            if (mainResult != null && string.IsNullOrEmpty(mainResult.overview))
            {
                if (ConfigurationManager.Configuration.PreferredMetadataLanguage.ToLower() != "en")
                {
                    Logger.Info("MovieDbProvider couldn't find meta for language " + ConfigurationManager.Configuration.PreferredMetadataLanguage + ". Trying English...");

                    url = string.Format(baseUrl, id, ApiKey, "en");

                    try
                    {
                        using (Stream json = await GetMovieDbResponse(new HttpRequestOptions
                        {
                            Url = url,
                            CancellationToken = cancellationToken,
                            AcceptHeader = AcceptHeader,
                            EnableResponseCache = true

                        }).ConfigureAwait(false))
                        {
                            mainResult = JsonSerializer.DeserializeFromStream<CompleteMovieData>(json);
                        }
                    }
                    catch (HttpException)
                    {
                    }

                    if (String.IsNullOrEmpty(mainResult.overview))
                    {
                        Logger.Error("MovieDbProvider - Unable to find information for " + item.Name + " (id:" + id + ")");
                        return null;
                    }
                }
            }
            return mainResult;
        }

        /// <summary>
        /// Processes the main info.
        /// </summary>
        /// <param name="movie">The movie.</param>
        /// <param name="movieData">The movie data.</param>
        protected virtual void ProcessMainInfo(BaseItem movie, CompleteMovieData movieData)
        {
            if (movie != null && movieData != null)
            {

                movie.Name = movieData.title ?? movieData.original_title ?? movie.Name;
                movie.Overview = movieData.overview;
                movie.Overview = movie.Overview != null ? movie.Overview.Replace("\n\n", "\n") : null;
                movie.HomePageUrl = movieData.homepage;
                movie.Budget = movieData.budget;
                movie.Revenue = movieData.revenue;

                if (!string.IsNullOrEmpty(movieData.tagline))
                {
                    movie.Taglines.Clear();
                    movie.AddTagline(movieData.tagline);
                }

                movie.SetProviderId(MetadataProviders.Imdb, movieData.imdb_id);

                if (movieData.belongs_to_collection != null)
                {
                    movie.SetProviderId(MetadataProviders.TmdbCollection, movieData.belongs_to_collection.id.ToString(CultureInfo.InvariantCulture));
                }

                float rating;
                string voteAvg = movieData.vote_average.ToString(CultureInfo.InvariantCulture);
                //tmdb appears to have unified their numbers to always report "7.3" regardless of country
                // so I removed the culture-specific processing here because it was not working for other countries -ebr
                if (float.TryParse(voteAvg, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out rating))
                    movie.CommunityRating = rating;

                //release date and certification are retrieved based on configured country and we fall back on US if not there
                if (movieData.releases != null && movieData.releases.countries != null)
                {
                    var ourRelease = movieData.releases.countries.FirstOrDefault(c => c.iso_3166_1.Equals(ConfigurationManager.Configuration.MetadataCountryCode, StringComparison.OrdinalIgnoreCase)) ?? new Country();
                    var usRelease = movieData.releases.countries.FirstOrDefault(c => c.iso_3166_1.Equals("US", StringComparison.OrdinalIgnoreCase)) ?? new Country();

                    movie.OfficialRating = ourRelease.certification ?? usRelease.certification;

                    if (ourRelease.release_date > new DateTime(1900, 1, 1))
                    {
                        if (ourRelease.release_date.Year != 1)
                        {
                            movie.PremiereDate = ourRelease.release_date.ToUniversalTime();
                            movie.ProductionYear = ourRelease.release_date.Year;
                        }
                    }
                    else
                    {
                        if (usRelease.release_date.Year != 1)
                        {
                            movie.PremiereDate = usRelease.release_date.ToUniversalTime();
                            movie.ProductionYear = usRelease.release_date.Year;
                        }
                    }
                }
                else
                {
                    if (movieData.release_date.Year != 1)
                    {
                        //no specific country release info at all
                        movie.PremiereDate = movieData.release_date.ToUniversalTime();
                        movie.ProductionYear = movieData.release_date.Year;
                    }
                }

                //if that didn't find a rating and we are a boxset, use the one from our first child
                if (movie.OfficialRating == null && movie is BoxSet)
                {
                    var boxset = movie as BoxSet;
                    Logger.Info("MovieDbProvider - Using rating of first child of boxset...");

                    var firstChild = boxset.Children.FirstOrDefault();

                    boxset.OfficialRating = firstChild != null ? firstChild.OfficialRating : null;
                }

                if (movieData.runtime > 0)
                    movie.OriginalRunTimeTicks = TimeSpan.FromMinutes(movieData.runtime).Ticks;

                //studios
                if (movieData.production_companies != null)
                {
                    movie.Studios.Clear();

                    foreach (var studio in movieData.production_companies.Select(c => c.name))
                    {
                        movie.AddStudio(studio);
                    }
                }

                //genres
                if (movieData.genres != null)
                {
                    movie.Genres.Clear();

                    foreach (var genre in movieData.genres.Select(g => g.name))
                    {
                        movie.AddGenre(genre);
                    }
                }

                movie.People.Clear();
                movie.Tags.Clear();

                //Actors, Directors, Writers - all in People
                //actors come from cast
                if (movieData.casts != null && movieData.casts.cast != null)
                {
                    foreach (var actor in movieData.casts.cast.OrderBy(a => a.order)) movie.AddPerson(new PersonInfo { Name = actor.name, Role = actor.character, Type = PersonType.Actor });
                }

                //and the rest from crew
                if (movieData.casts != null && movieData.casts.crew != null)
                {
                    foreach (var person in movieData.casts.crew) movie.AddPerson(new PersonInfo { Name = person.name, Role = person.job, Type = person.department });
                }

                if (movieData.keywords != null && movieData.keywords.keywords != null)
                {
                    movie.Tags = movieData.keywords.keywords.Select(i => i.name).ToList();
                }
            }

        }

        private DateTime _lastRequestDate = DateTime.MinValue;

        /// <summary>
        /// Gets the movie db response.
        /// </summary>
        internal async Task<Stream> GetMovieDbResponse(HttpRequestOptions options)
        {
            var cancellationToken = options.CancellationToken;

            await _movieDbResourcePool.WaitAsync(cancellationToken).ConfigureAwait(false);

            try
            {
                // Limit to three requests per second
                var diff = 330 - (DateTime.Now - _lastRequestDate).TotalMilliseconds;

                if (diff > 0)
                {
                    await Task.Delay(Convert.ToInt32(diff), cancellationToken).ConfigureAwait(false);
                }

                _lastRequestDate = DateTime.Now;

                return await HttpClient.Get(options).ConfigureAwait(false);
            }
            finally
            {
                _lastRequestDate = DateTime.Now;

                _movieDbResourcePool.Release();
            }
        }

        /// <summary>
        /// The remove
        /// </summary>
        const string remove = "\"'!`?";
        // "Face/Off" support.
        /// <summary>
        /// The spacers
        /// </summary>
        const string spacers = "/,.:;\\(){}[]+-_=–*";  // (there are not actually two - in the they are different char codes)
        /// <summary>
        /// The replace start numbers
        /// </summary>
        static readonly Dictionary<string, string> ReplaceStartNumbers = new Dictionary<string, string> {
            {"1 ","one "},
            {"2 ","two "},
            {"3 ","three "},
            {"4 ","four "},
            {"5 ","five "},
            {"6 ","six "},
            {"7 ","seven "},
            {"8 ","eight "},
            {"9 ","nine "},
            {"10 ","ten "},
            {"11 ","eleven "},
            {"12 ","twelve "},
            {"13 ","thirteen "},
            {"100 ","one hundred "},
            {"101 ","one hundred one "}
        };

        /// <summary>
        /// The replace end numbers
        /// </summary>
        static readonly Dictionary<string, string> ReplaceEndNumbers = new Dictionary<string, string> {
            {" 1"," i"},
            {" 2"," ii"},
            {" 3"," iii"},
            {" 4"," iv"},
            {" 5"," v"},
            {" 6"," vi"},
            {" 7"," vii"},
            {" 8"," viii"},
            {" 9"," ix"},
            {" 10"," x"}
        };

        /// <summary>
        /// Gets the name of the comparable.
        /// </summary>
        /// <param name="name">The name.</param>
        /// <param name="logger">The logger.</param>
        /// <returns>System.String.</returns>
        internal static string GetComparableName(string name, ILogger logger)
        {
            name = name.ToLower();
            name = name.Replace("á", "a");
            name = name.Replace("é", "e");
            name = name.Replace("í", "i");
            name = name.Replace("ó", "o");
            name = name.Replace("ú", "u");
            name = name.Replace("ü", "u");
            name = name.Replace("ñ", "n");
            foreach (var pair in ReplaceStartNumbers)
            {
                if (name.StartsWith(pair.Key))
                {
                    name = name.Remove(0, pair.Key.Length);
                    name = pair.Value + name;
                    logger.Info("MovieDbProvider - Replaced Start Numbers: " + name);
                }
            }
            foreach (var pair in ReplaceEndNumbers)
            {
                if (name.EndsWith(pair.Key))
                {
                    name = name.Remove(name.IndexOf(pair.Key), pair.Key.Length);
                    name = name + pair.Value;
                    logger.Info("MovieDbProvider - Replaced End Numbers: " + name);
                }
            }
            name = name.Normalize(NormalizationForm.FormKD);
            var sb = new StringBuilder();
            foreach (var c in name)
            {
                if (c >= 0x2B0 && c <= 0x0333)
                {
                    // skip char modifier and diacritics 
                }
                else if (remove.IndexOf(c) > -1)
                {
                    // skip chars we are removing
                }
                else if (spacers.IndexOf(c) > -1)
                {
                    sb.Append(" ");
                }
                else if (c == '&')
                {
                    sb.Append(" and ");
                }
                else
                {
                    sb.Append(c);
                }
            }
            name = sb.ToString();
            name = name.Replace(", the", "");
            name = name.Replace(" the ", " ");
            name = name.Replace("the ", "");

            string prev_name;
            do
            {
                prev_name = name;
                name = name.Replace("  ", " ");
            } while (name.Length != prev_name.Length);

            return name.Trim();
        }

        #region Result Objects


        /// <summary>
        /// Class TmdbTitle
        /// </summary>
        protected class TmdbTitle
        {
            /// <summary>
            /// Gets or sets the iso_3166_1.
            /// </summary>
            /// <value>The iso_3166_1.</value>
            public string iso_3166_1 { get; set; }
            /// <summary>
            /// Gets or sets the title.
            /// </summary>
            /// <value>The title.</value>
            public string title { get; set; }
        }

        /// <summary>
        /// Class TmdbAltTitleResults
        /// </summary>
        protected class TmdbAltTitleResults
        {
            /// <summary>
            /// Gets or sets the id.
            /// </summary>
            /// <value>The id.</value>
            public int id { get; set; }
            /// <summary>
            /// Gets or sets the titles.
            /// </summary>
            /// <value>The titles.</value>
            public List<TmdbTitle> titles { get; set; }
        }

        /// <summary>
        /// Class TmdbMovieSearchResult
        /// </summary>
        protected class TmdbMovieSearchResult
        {
            /// <summary>
            /// Gets or sets a value indicating whether this <see cref="TmdbMovieSearchResult" /> is adult.
            /// </summary>
            /// <value><c>true</c> if adult; otherwise, <c>false</c>.</value>
            public bool adult { get; set; }
            /// <summary>
            /// Gets or sets the backdrop_path.
            /// </summary>
            /// <value>The backdrop_path.</value>
            public string backdrop_path { get; set; }
            /// <summary>
            /// Gets or sets the id.
            /// </summary>
            /// <value>The id.</value>
            public int id { get; set; }
            /// <summary>
            /// Gets or sets the original_title.
            /// </summary>
            /// <value>The original_title.</value>
            public string original_title { get; set; }
            /// <summary>
            /// Gets or sets the release_date.
            /// </summary>
            /// <value>The release_date.</value>
            public string release_date { get; set; }
            /// <summary>
            /// Gets or sets the poster_path.
            /// </summary>
            /// <value>The poster_path.</value>
            public string poster_path { get; set; }
            /// <summary>
            /// Gets or sets the popularity.
            /// </summary>
            /// <value>The popularity.</value>
            public double popularity { get; set; }
            /// <summary>
            /// Gets or sets the title.
            /// </summary>
            /// <value>The title.</value>
            public string title { get; set; }
            /// <summary>
            /// Gets or sets the vote_average.
            /// </summary>
            /// <value>The vote_average.</value>
            public double vote_average { get; set; }
            /// <summary>
            /// Gets or sets the vote_count.
            /// </summary>
            /// <value>The vote_count.</value>
            public int vote_count { get; set; }
        }

        /// <summary>
        /// Class TmdbMovieSearchResults
        /// </summary>
        protected class TmdbMovieSearchResults
        {
            /// <summary>
            /// Gets or sets the page.
            /// </summary>
            /// <value>The page.</value>
            public int page { get; set; }
            /// <summary>
            /// Gets or sets the results.
            /// </summary>
            /// <value>The results.</value>
            public List<TmdbMovieSearchResult> results { get; set; }
            /// <summary>
            /// Gets or sets the total_pages.
            /// </summary>
            /// <value>The total_pages.</value>
            public int total_pages { get; set; }
            /// <summary>
            /// Gets or sets the total_results.
            /// </summary>
            /// <value>The total_results.</value>
            public int total_results { get; set; }
        }
        
        protected class BelongsToCollection
        {
            public int id { get; set; }
            public string name { get; set; }
            public string poster_path { get; set; }
            public string backdrop_path { get; set; }
        }

        protected class GenreItem
        {
            public int id { get; set; }
            public string name { get; set; }
        }

        protected class ProductionCompany
        {
            public string name { get; set; }
            public int id { get; set; }
        }

        protected class ProductionCountry
        {
            public string iso_3166_1 { get; set; }
            public string name { get; set; }
        }

        protected class SpokenLanguage
        {
            public string iso_639_1 { get; set; }
            public string name { get; set; }
        }

        protected class Cast
        {
            public int id { get; set; }
            public string name { get; set; }
            public string character { get; set; }
            public int order { get; set; }
            public int cast_id { get; set; }
            public string profile_path { get; set; }
        }

        protected class Crew
        {
            public int id { get; set; }
            public string name { get; set; }
            public string department { get; set; }
            public string job { get; set; }
            public string profile_path { get; set; }
        }

        protected class Casts
        {
            public List<Cast> cast { get; set; }
            public List<Crew> crew { get; set; }
        }

        protected class Country
        {
            public string iso_3166_1 { get; set; }
            public string certification { get; set; }
            public DateTime release_date { get; set; }
        }

        protected class Releases
        {
            public List<Country> countries { get; set; }
        }

        protected class Keyword
        {
            public int id { get; set; }
            public string name { get; set; }
        }

        protected class Keywords
        {
            public List<Keyword> keywords { get; set; }
        }

        protected class CompleteMovieData
        {
            public bool adult { get; set; }
            public string backdrop_path { get; set; }
            public BelongsToCollection belongs_to_collection { get; set; }
            public int budget { get; set; }
            public List<GenreItem> genres { get; set; }
            public string homepage { get; set; }
            public int id { get; set; }
            public string imdb_id { get; set; }
            public string original_title { get; set; }
            public string overview { get; set; }
            public double popularity { get; set; }
            public string poster_path { get; set; }
            public List<ProductionCompany> production_companies { get; set; }
            public List<ProductionCountry> production_countries { get; set; }
            public DateTime release_date { get; set; }
            public int revenue { get; set; }
            public int runtime { get; set; }
            public List<SpokenLanguage> spoken_languages { get; set; }
            public string status { get; set; }
            public string tagline { get; set; }
            public string title { get; set; }
            public double vote_average { get; set; }
            public int vote_count { get; set; }
            public Casts casts { get; set; }
            public Releases releases { get; set; }
            public Keywords keywords { get; set; }
        }

        public class TmdbImageSettings
        {
            public List<string> backdrop_sizes { get; set; }
            public string base_url { get; set; }
            public List<string> poster_sizes { get; set; }
            public List<string> profile_sizes { get; set; }
        }

        public class TmdbSettingsResult
        {
            public TmdbImageSettings images { get; set; }
        }
        #endregion

        public void Dispose()
        {
            Dispose(true);
        }
    }
}