using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Movies;
using MediaBrowser.Controller.Entities.TV;
using MediaBrowser.Controller.Persistence;
using MediaBrowser.Model.Entities;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Security;
using System.Text;
using System.Xml;

namespace MediaBrowser.Providers.Savers
{
    /// <summary>
    /// Class XmlHelpers
    /// </summary>
    public static class XmlSaverHelpers
    {
        private static readonly Dictionary<string, string> CommonTags = new[] {     
               
                    "Added",
                    "AspectRatio",
                    "AudioDbAlbumId",
                    "AudioDbArtistId",
                    "AwardSummary",
                    "BirthDate",
                    "Budget",
                    "certification",
                    "Chapters",
                    "ContentRating",
                    "CustomRating",
                    "CriticRating",
                    "CriticRatingSummary",
                    "DeathDate",
                    "DisplayOrder",
                    "EndDate",
                    "Genres",
                    "Genre",
                    "GamesDbId",
                    "IMDB_ID",
                    "IMDB",
                    "IMDbId",
                    "Language",
                    "LocalTitle",
                    "LockData",
                    "LockedFields",
                    "Format3D",
                    "Metascore",
                    "MPAARating",
                    "MusicBrainzArtistId",
                    "MusicBrainzAlbumArtistId",
                    "MusicBrainzAlbumId",
                    "MusicBrainzReleaseGroupId",

                    // Old - not used anymore
                    "MusicbrainzId",

                    "Overview",
                    "Persons",
                    "PlotKeywords",
                    "PremiereDate",
                    "ProductionYear",
                    "Rating",
                    "Revenue",
                    "RottenTomatoesId",
                    "RunningTime",
                    "Runtime",
                    "SortTitle",
                    "Studios",
                    "Tags",
                    "TagLine",
                    "Taglines",
                    "TMDbCollectionId",
                    "TMDbId",
                    "Trailer",
                    "Trailers",
                    "TVcomId",
                    "TvDbId",
                    "Type",
                    "TVRageId",
                    "VoteCount",
                    "Website",
                    "Zap2ItId",
                    "CollectionItems"

        }.ToDictionary(i => i, StringComparer.OrdinalIgnoreCase);

        /// <summary>
        /// The us culture
        /// </summary>
        private static readonly CultureInfo UsCulture = new CultureInfo("en-US");

        /// <summary>
        /// Saves the specified XML.
        /// </summary>
        /// <param name="xml">The XML.</param>
        /// <param name="path">The path.</param>
        /// <param name="xmlTagsUsed">The XML tags used.</param>
        public static void Save(StringBuilder xml, string path, List<string> xmlTagsUsed)
        {
            if (File.Exists(path))
            {
                var position = xml.ToString().LastIndexOf("</", StringComparison.OrdinalIgnoreCase);
                xml.Insert(position, GetCustomTags(path, xmlTagsUsed));
            }

            var xmlDocument = new XmlDocument();
            xmlDocument.LoadXml(xml.ToString());

            //Add the new node to the document.
            xmlDocument.InsertBefore(xmlDocument.CreateXmlDeclaration("1.0", "UTF-8", "yes"), xmlDocument.DocumentElement);

            var parentPath = Path.GetDirectoryName(path);

            Directory.CreateDirectory(parentPath);

            var wasHidden = false;

            var file = new FileInfo(path);

            // This will fail if the file is hidden
            if (file.Exists)
            {
                if ((file.Attributes & FileAttributes.Hidden) == FileAttributes.Hidden)
                {
                    file.Attributes &= ~FileAttributes.Hidden;

                    wasHidden = true;
                }
            }

            using (var filestream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read))
            {
                using (var streamWriter = new StreamWriter(filestream, Encoding.UTF8))
                {
                    xmlDocument.Save(streamWriter);
                }
            }

            if (wasHidden)
            {
                file.Refresh();

                // Add back the attribute
                file.Attributes |= FileAttributes.Hidden;
            }
        }

        /// <summary>
        /// Gets the custom tags.
        /// </summary>
        /// <param name="path">The path.</param>
        /// <param name="xmlTagsUsed">The XML tags used.</param>
        /// <returns>System.String.</returns>
        private static string GetCustomTags(string path, List<string> xmlTagsUsed)
        {
            var settings = new XmlReaderSettings
            {
                CheckCharacters = false,
                IgnoreProcessingInstructions = true,
                IgnoreComments = true,
                ValidationType = ValidationType.None
            };

            var builder = new StringBuilder();

            using (var streamReader = new StreamReader(path, Encoding.UTF8))
            {
                // Use XmlReader for best performance
                using (var reader = XmlReader.Create(streamReader, settings))
                {
                    reader.MoveToContent();

                    // Loop through each element
                    while (reader.Read())
                    {
                        if (reader.NodeType == XmlNodeType.Element)
                        {
                            var name = reader.Name;

                            if (!CommonTags.ContainsKey(name) && !xmlTagsUsed.Contains(name, StringComparer.OrdinalIgnoreCase))
                            {
                                builder.AppendLine(reader.ReadOuterXml());
                            }
                            else
                            {
                                reader.Skip();
                            }
                        }
                    }
                }
            }

            return builder.ToString();
        }

        /// <summary>
        /// Adds the common nodes.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="builder">The builder.</param>
        public static void AddCommonNodes(BaseItem item, StringBuilder builder)
        {
            if (!string.IsNullOrEmpty(item.OfficialRating))
            {
                builder.Append("<ContentRating>" + SecurityElement.Escape(item.OfficialRating) + "</ContentRating>");
                builder.Append("<MPAARating>" + SecurityElement.Escape(item.OfficialRating) + "</MPAARating>");
                builder.Append("<certification>" + SecurityElement.Escape(item.OfficialRating) + "</certification>");
            }

            builder.Append("<Added>" + SecurityElement.Escape(item.DateCreated.ToLocalTime().ToString("G")) + "</Added>");

            builder.Append("<LockData>" + item.DontFetchMeta.ToString().ToLower() + "</LockData>");

            if (item.LockedFields.Count > 0)
            {
                builder.Append("<LockedFields>" + string.Join("|", item.LockedFields.Select(i => i.ToString()).ToArray()) + "</LockedFields>");
            }

            if (!string.IsNullOrEmpty(item.DisplayMediaType))
            {
                builder.Append("<Type>" + SecurityElement.Escape(item.DisplayMediaType) + "</Type>");
            }

            var hasCriticRating = item as IHasCriticRating;
            if (hasCriticRating != null)
            {
                if (hasCriticRating.CriticRating.HasValue)
                {
                    builder.Append("<CriticRating>" + SecurityElement.Escape(hasCriticRating.CriticRating.Value.ToString(UsCulture)) + "</CriticRating>");
                }

                if (!string.IsNullOrEmpty(hasCriticRating.CriticRatingSummary))
                {
                    builder.Append("<CriticRatingSummary><![CDATA[" + hasCriticRating.CriticRatingSummary + "]]></CriticRatingSummary>");
                }
            }

            if (!string.IsNullOrEmpty(item.Overview))
            {
                builder.Append("<Overview><![CDATA[" + item.Overview + "]]></Overview>");
            }

            if (!string.IsNullOrEmpty(item.CustomRating))
            {
                builder.Append("<CustomRating>" + SecurityElement.Escape(item.CustomRating) + "</CustomRating>");
            }

            if (!string.IsNullOrEmpty(item.Name) && !(item is Episode))
            {
                builder.Append("<LocalTitle>" + SecurityElement.Escape(item.Name) + "</LocalTitle>");
            }

            if (!string.IsNullOrEmpty(item.ForcedSortName))
            {
                builder.Append("<SortTitle>" + SecurityElement.Escape(item.ForcedSortName) + "</SortTitle>");
            }

            if (item.PremiereDate.HasValue)
            {
                if (item is Person)
                {
                    builder.Append("<BirthDate>" + SecurityElement.Escape(item.PremiereDate.Value.ToLocalTime().ToString("yyyy-MM-dd")) + "</BirthDate>");
                }
                else if (!(item is Episode))
                {
                    builder.Append("<PremiereDate>" + SecurityElement.Escape(item.PremiereDate.Value.ToLocalTime().ToString("yyyy-MM-dd")) + "</PremiereDate>");
                }
            }

            if (item.EndDate.HasValue)
            {
                if (item is Person)
                {
                    builder.Append("<DeathDate>" + SecurityElement.Escape(item.EndDate.Value.ToString("yyyy-MM-dd")) + "</DeathDate>");
                }
                else if (!(item is Episode))
                {
                    builder.Append("<EndDate>" + SecurityElement.Escape(item.EndDate.Value.ToString("yyyy-MM-dd")) + "</EndDate>");
                }
            }

            var hasTrailers = item as IHasTrailers;
            if (hasTrailers != null)
            {
                if (hasTrailers.RemoteTrailers.Count > 0)
                {
                    builder.Append("<Trailers>");

                    foreach (var trailer in hasTrailers.RemoteTrailers)
                    {
                        builder.Append("<Trailer>" + SecurityElement.Escape(trailer.Url) + "</Trailer>");
                    }

                    builder.Append("</Trailers>");
                }
            }

            var hasDisplayOrder = item as IHasDisplayOrder;
            if (hasDisplayOrder != null && !string.IsNullOrEmpty(hasDisplayOrder.DisplayOrder))
            {
                builder.Append("<DisplayOrder>" + SecurityElement.Escape(hasDisplayOrder.DisplayOrder) + "</DisplayOrder>");
            }

            var hasMetascore = item as IHasMetascore;
            if (hasMetascore != null && hasMetascore.Metascore.HasValue)
            {
                builder.Append("<Metascore>" + SecurityElement.Escape(hasMetascore.Metascore.Value.ToString(UsCulture)) + "</Metascore>");
            }

            var hasAwards = item as IHasAwards;
            if (hasAwards != null && !string.IsNullOrEmpty(hasAwards.AwardSummary))
            {
                builder.Append("<AwardSummary>" + SecurityElement.Escape(hasAwards.AwardSummary) + "</AwardSummary>");
            }

            var hasBudget = item as IHasBudget;
            if (hasBudget != null)
            {
                if (hasBudget.Budget.HasValue)
                {
                    builder.Append("<Budget>" + SecurityElement.Escape(hasBudget.Budget.Value.ToString(UsCulture)) + "</Budget>");
                }

                if (hasBudget.Revenue.HasValue)
                {
                    builder.Append("<Revenue>" + SecurityElement.Escape(hasBudget.Revenue.Value.ToString(UsCulture)) + "</Revenue>");
                }
            }

            if (item.CommunityRating.HasValue)
            {
                builder.Append("<Rating>" + SecurityElement.Escape(item.CommunityRating.Value.ToString(UsCulture)) + "</Rating>");
            }
            if (item.VoteCount.HasValue)
            {
                builder.Append("<VoteCount>" + SecurityElement.Escape(item.VoteCount.Value.ToString(UsCulture)) + "</VoteCount>");
            }

            if (item.ProductionYear.HasValue && !(item is Person))
            {
                builder.Append("<ProductionYear>" + SecurityElement.Escape(item.ProductionYear.Value.ToString(UsCulture)) + "</ProductionYear>");
            }

            if (!string.IsNullOrEmpty(item.HomePageUrl))
            {
                builder.Append("<Website>" + SecurityElement.Escape(item.HomePageUrl) + "</Website>");
            }

            var hasAspectRatio = item as IHasAspectRatio;
            if (hasAspectRatio != null)
            {
                if (!string.IsNullOrEmpty(hasAspectRatio.AspectRatio))
                {
                    builder.Append("<AspectRatio>" + SecurityElement.Escape(hasAspectRatio.AspectRatio) + "</AspectRatio>");
                }
            }

            var hasLanguage = item as IHasPreferredMetadataLanguage;
            if (hasLanguage != null)
            {
                if (!string.IsNullOrEmpty(hasLanguage.PreferredMetadataLanguage))
                {
                    builder.Append("<Language>" + SecurityElement.Escape(hasLanguage.PreferredMetadataLanguage) + "</Language>");
                }
            }

            // Use original runtime here, actual file runtime later in MediaInfo
            var runTimeTicks = item.RunTimeTicks;

            if (runTimeTicks.HasValue)
            {
                var timespan = TimeSpan.FromTicks(runTimeTicks.Value);

                builder.Append("<RunningTime>" + Convert.ToInt32(timespan.TotalMinutes).ToString(UsCulture) + "</RunningTime>");
                builder.Append("<Runtime>" + Convert.ToInt32(timespan.TotalMinutes).ToString(UsCulture) + "</Runtime>");
            }

            var imdb = item.GetProviderId(MetadataProviders.Imdb);

            if (!string.IsNullOrEmpty(imdb))
            {
                builder.Append("<IMDB_ID>" + SecurityElement.Escape(imdb) + "</IMDB_ID>");
                builder.Append("<IMDB>" + SecurityElement.Escape(imdb) + "</IMDB>");
                builder.Append("<IMDbId>" + SecurityElement.Escape(imdb) + "</IMDbId>");
            }

            var tmdb = item.GetProviderId(MetadataProviders.Tmdb);

            if (!string.IsNullOrEmpty(tmdb))
            {
                builder.Append("<TMDbId>" + SecurityElement.Escape(tmdb) + "</TMDbId>");
            }

            if (!(item is Series))
            {
                var tvdb = item.GetProviderId(MetadataProviders.Tvdb);

                if (!string.IsNullOrEmpty(tvdb))
                {
                    builder.Append("<TvDbId>" + SecurityElement.Escape(tvdb) + "</TvDbId>");
                }
            }

            var externalId = item.GetProviderId(MetadataProviders.Tvcom);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<TVcomId>" + SecurityElement.Escape(externalId) + "</TVcomId>");
            }

            externalId = item.GetProviderId(MetadataProviders.RottenTomatoes);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<RottenTomatoesId>" + SecurityElement.Escape(externalId) + "</RottenTomatoesId>");
            }

            externalId = item.GetProviderId(MetadataProviders.Zap2It);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<Zap2ItId>" + SecurityElement.Escape(externalId) + "</Zap2ItId>");
            }

            externalId = item.GetProviderId(MetadataProviders.MusicBrainzAlbum);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<MusicBrainzAlbumId>" + SecurityElement.Escape(externalId) + "</MusicBrainzAlbumId>");
            }

            externalId = item.GetProviderId(MetadataProviders.MusicBrainzAlbumArtist);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<MusicBrainzAlbumArtistId>" + SecurityElement.Escape(externalId) + "</MusicBrainzAlbumArtistId>");
            }

            externalId = item.GetProviderId(MetadataProviders.MusicBrainzArtist);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<MusicBrainzArtistId>" + SecurityElement.Escape(externalId) + "</MusicBrainzArtistId>");
            }

            externalId = item.GetProviderId(MetadataProviders.MusicBrainzReleaseGroup);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<MusicBrainzReleaseGroupId>" + SecurityElement.Escape(externalId) + "</MusicBrainzReleaseGroupId>");
            }

            externalId = item.GetProviderId(MetadataProviders.Gamesdb);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<GamesDbId>" + SecurityElement.Escape(externalId) + "</GamesDbId>");
            }

            externalId = item.GetProviderId(MetadataProviders.TmdbCollection);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<TMDbCollectionId>" + SecurityElement.Escape(externalId) + "</TMDbCollectionId>");
            }

            externalId = item.GetProviderId(MetadataProviders.AudioDbArtist);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<AudioDbArtistId>" + SecurityElement.Escape(externalId) + "</AudioDbArtistId>");
            }

            externalId = item.GetProviderId(MetadataProviders.AudioDbAlbum);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<AudioDbAlbumId>" + SecurityElement.Escape(externalId) + "</AudioDbAlbumId>");
            }

            externalId = item.GetProviderId(MetadataProviders.TvRage);

            if (!string.IsNullOrEmpty(externalId))
            {
                builder.Append("<TVRageId>" + SecurityElement.Escape(externalId) + "</TVRageId>");
            }

            var hasTagline = item as IHasTaglines;
            if (hasTagline != null)
            {
                if (hasTagline.Taglines.Count > 0)
                {
                    builder.Append("<Taglines>");

                    foreach (var tagline in hasTagline.Taglines)
                    {
                        builder.Append("<Tagline>" + SecurityElement.Escape(tagline) + "</Tagline>");
                    }

                    builder.Append("</Taglines>");
                }
            }

            if (item.Genres.Count > 0)
            {
                builder.Append("<Genres>");

                foreach (var genre in item.Genres)
                {
                    builder.Append("<Genre>" + SecurityElement.Escape(genre) + "</Genre>");
                }

                builder.Append("</Genres>");
            }

            if (item.Studios.Count > 0)
            {
                builder.Append("<Studios>");

                foreach (var studio in item.Studios)
                {
                    builder.Append("<Studio>" + SecurityElement.Escape(studio) + "</Studio>");
                }

                builder.Append("</Studios>");
            }

            var hasTags = item as IHasTags;
            if (hasTags != null)
            {
                if (hasTags.Tags.Count > 0)
                {
                    builder.Append("<Tags>");

                    foreach (var tag in hasTags.Tags)
                    {
                        builder.Append("<Tag>" + SecurityElement.Escape(tag) + "</Tag>");
                    }

                    builder.Append("</Tags>");
                }
            }

            var hasKeywords = item as IHasKeywords;
            if (hasKeywords != null)
            {
                if (hasKeywords.Keywords.Count > 0)
                {
                    builder.Append("<PlotKeywords>");

                    foreach (var tag in hasKeywords.Keywords)
                    {
                        builder.Append("<PlotKeyword>" + SecurityElement.Escape(tag) + "</PlotKeyword>");
                    }

                    builder.Append("</PlotKeywords>");
                }
            }

            if (item.People.Count > 0)
            {
                builder.Append("<Persons>");

                foreach (var person in item.People)
                {
                    builder.Append("<Person>");
                    builder.Append("<Name>" + SecurityElement.Escape(person.Name) + "</Name>");
                    builder.Append("<Type>" + SecurityElement.Escape(person.Type) + "</Type>");
                    builder.Append("<Role>" + SecurityElement.Escape(person.Role) + "</Role>");

                    if (person.SortOrder.HasValue)
                    {
                        builder.Append("<SortOrder>" + SecurityElement.Escape(person.SortOrder.Value.ToString(UsCulture)) + "</SortOrder>");
                    }

                    builder.Append("</Person>");
                }

                builder.Append("</Persons>");
            }

            var folder = item as BoxSet;
            if (folder != null)
            {
                AddCollectionItems(folder, builder);
            }
        }

        public static void AddChapters(Video item, StringBuilder builder, IItemRepository repository)
        {
            var chapters = repository.GetChapters(item.Id);

            builder.Append("<Chapters>");

            foreach (var chapter in chapters)
            {
                builder.Append("<Chapter>");
                builder.Append("<Name>" + SecurityElement.Escape(chapter.Name) + "</Name>");

                var time = TimeSpan.FromTicks(chapter.StartPositionTicks);
                var ms = Convert.ToInt64(time.TotalMilliseconds);

                builder.Append("<StartPositionMs>" + SecurityElement.Escape(ms.ToString(UsCulture)) + "</StartPositionMs>");
                builder.Append("</Chapter>");
            }

            builder.Append("</Chapters>");
        }

        /// <summary>
        /// Appends the media info.
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public static void AddMediaInfo<T>(T item, StringBuilder builder, IItemRepository itemRepository)
            where T : BaseItem, IHasMediaStreams
        {
            var video = item as Video;

            if (video != null && video.Video3DFormat.HasValue)
            {
                switch (video.Video3DFormat.Value)
                {
                    case Video3DFormat.FullSideBySide:
                        builder.Append("<Format3D>FSBS</Format3D>");
                        break;
                    case Video3DFormat.FullTopAndBottom:
                        builder.Append("<Format3D>FTAB</Format3D>");
                        break;
                    case Video3DFormat.HalfSideBySide:
                        builder.Append("<Format3D>HSBS</Format3D>");
                        break;
                    case Video3DFormat.HalfTopAndBottom:
                        builder.Append("<Format3D>HTAB</Format3D>");
                        break;
                }
            }
        }

        public static void AddCollectionItems(Folder item, StringBuilder builder)
        {
            var items = item.LinkedChildren
                .Where(i => i.Type == LinkedChildType.Manual && !string.IsNullOrWhiteSpace(i.ItemName))
                .ToList();

            if (items.Count == 0)
            {
                return;
            }

            builder.Append("<CollectionItems>");
            foreach (var link in items)
            {
                builder.Append("<CollectionItem>");

                builder.Append("<Name>" + SecurityElement.Escape(link.ItemName) + "</Name>");
                builder.Append("<Type>" + SecurityElement.Escape(link.ItemType) + "</Type>");

                if (link.ItemYear.HasValue)
                {
                    builder.Append("<Year>" + SecurityElement.Escape(link.ItemYear.Value.ToString(UsCulture)) + "</Year>");
                }

                builder.Append("</CollectionItem>");
            }
            builder.Append("</CollectionItems>");
        }
    }
}