#nullable disable
#pragma warning disable CS1591

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using Jellyfin.Extensions;
using MediaBrowser.Model.Dlna;
using MediaBrowser.Model.Extensions;
using MediaBrowser.Model.MediaInfo;

namespace MediaBrowser.Model.Entities
{
    /// <summary>
    /// Class MediaStream.
    /// </summary>
    public class MediaStream
    {
        private static readonly string[] _specialCodes =
        {
            // Uncoded languages.
            "mis",
            // Multiple languages.
            "mul",
            // Undetermined.
            "und",
            // No linguistic content; not applicable.
            "zxx"
        };

        /// <summary>
        /// Gets or sets the codec.
        /// </summary>
        /// <value>The codec.</value>
        public string Codec { get; set; }

        /// <summary>
        /// Gets or sets the codec tag.
        /// </summary>
        /// <value>The codec tag.</value>
        public string CodecTag { get; set; }

        /// <summary>
        /// Gets or sets the language.
        /// </summary>
        /// <value>The language.</value>
        public string Language { get; set; }

        /// <summary>
        /// Gets or sets the color range.
        /// </summary>
        /// <value>The color range.</value>
        public string ColorRange { get; set; }

        /// <summary>
        /// Gets or sets the color space.
        /// </summary>
        /// <value>The color space.</value>
        public string ColorSpace { get; set; }

        /// <summary>
        /// Gets or sets the color transfer.
        /// </summary>
        /// <value>The color transfer.</value>
        public string ColorTransfer { get; set; }

        /// <summary>
        /// Gets or sets the color primaries.
        /// </summary>
        /// <value>The color primaries.</value>
        public string ColorPrimaries { get; set; }

        /// <summary>
        /// Gets or sets the comment.
        /// </summary>
        /// <value>The comment.</value>
        public string Comment { get; set; }

        /// <summary>
        /// Gets or sets the time base.
        /// </summary>
        /// <value>The time base.</value>
        public string TimeBase { get; set; }

        /// <summary>
        /// Gets or sets the codec time base.
        /// </summary>
        /// <value>The codec time base.</value>
        public string CodecTimeBase { get; set; }

        /// <summary>
        /// Gets or sets the title.
        /// </summary>
        /// <value>The title.</value>
        public string Title { get; set; }

        /// <summary>
        /// Gets the video range.
        /// </summary>
        /// <value>The video range.</value>
        public string VideoRange
        {
            get
            {
                var (videoRange, videoRangeType) = getVideoColorRange();

                return videoRange;
            }
        }

        /// <summary>
        /// Gets the video range type.
        /// </summary>
        /// <value>The video range type.</value>
        public string VideoRangeType
        {
            get
            {
                var (videoRange, videoRangeType) = getVideoColorRange();

                return videoRangeType;
            }
        }

        public string LocalizedUndefined { get; set; }

        public string LocalizedDefault { get; set; }

        public string LocalizedForced { get; set; }

        public string LocalizedExternal { get; set; }

        public string DisplayTitle
        {
            get
            {
                switch (Type)
                {
                    case MediaStreamType.Audio:
                    {
                        var attributes = new List<string>();

                        // Do not display the language code in display titles if unset or set to a special code. Show it in all other cases (possibly expanded).
                        if (!string.IsNullOrEmpty(Language) && !_specialCodes.Contains(Language, StringComparison.OrdinalIgnoreCase))
                        {
                            // Get full language string i.e. eng -> English. Will not work for some languages which use ISO 639-2/B instead of /T codes.
                            string fullLanguage = CultureInfo
                                .GetCultures(CultureTypes.NeutralCultures)
                                .FirstOrDefault(r => r.ThreeLetterISOLanguageName.Equals(Language, StringComparison.OrdinalIgnoreCase))
                                ?.DisplayName;
                            attributes.Add(StringHelper.FirstToUpper(fullLanguage ?? Language));
                        }

                        if (!string.IsNullOrEmpty(Codec) && !string.Equals(Codec, "dca", StringComparison.OrdinalIgnoreCase) && !string.Equals(Codec, "dts", StringComparison.OrdinalIgnoreCase))
                        {
                            attributes.Add(AudioCodec.GetFriendlyName(Codec));
                        }
                        else if (!string.IsNullOrEmpty(Profile) && !string.Equals(Profile, "lc", StringComparison.OrdinalIgnoreCase))
                        {
                            attributes.Add(Profile);
                        }

                        if (!string.IsNullOrEmpty(ChannelLayout))
                        {
                            attributes.Add(StringHelper.FirstToUpper(ChannelLayout));
                        }
                        else if (Channels.HasValue)
                        {
                            attributes.Add(Channels.Value.ToString(CultureInfo.InvariantCulture) + " ch");
                        }

                        if (IsDefault)
                        {
                            attributes.Add(string.IsNullOrEmpty(LocalizedDefault) ? "Default" : LocalizedDefault);
                        }

                        if (IsExternal)
                        {
                            attributes.Add(string.IsNullOrEmpty(LocalizedExternal) ? "External" : LocalizedExternal);
                        }

                        if (!string.IsNullOrEmpty(Title))
                        {
                            var result = new StringBuilder(Title);
                            foreach (var tag in attributes)
                            {
                                // Keep Tags that are not already in Title.
                                if (!Title.Contains(tag, StringComparison.OrdinalIgnoreCase))
                                {
                                    result.Append(" - ").Append(tag);
                                }
                            }

                            return result.ToString();
                        }

                        return string.Join(" - ", attributes);
                    }

                    case MediaStreamType.Video:
                    {
                        var attributes = new List<string>();

                        var resolutionText = GetResolutionText();

                        if (!string.IsNullOrEmpty(resolutionText))
                        {
                            attributes.Add(resolutionText);
                        }

                        if (!string.IsNullOrEmpty(Codec))
                        {
                            attributes.Add(Codec.ToUpperInvariant());
                        }

                        if (!string.IsNullOrEmpty(VideoRange))
                        {
                            attributes.Add(VideoRange.ToUpperInvariant());
                        }

                        if (!string.IsNullOrEmpty(Title))
                        {
                            var result = new StringBuilder(Title);
                            foreach (var tag in attributes)
                            {
                                // Keep Tags that are not already in Title.
                                if (!Title.Contains(tag, StringComparison.OrdinalIgnoreCase))
                                {
                                    result.Append(" - ").Append(tag);
                                }
                            }

                            return result.ToString();
                        }

                        return string.Join(' ', attributes);
                    }

                    case MediaStreamType.Subtitle:
                    {
                        var attributes = new List<string>();

                        if (!string.IsNullOrEmpty(Language))
                        {
                            // Get full language string i.e. eng -> English. Will not work for some languages which use ISO 639-2/B instead of /T codes.
                            string fullLanguage = CultureInfo
                                .GetCultures(CultureTypes.NeutralCultures)
                                .FirstOrDefault(r => r.ThreeLetterISOLanguageName.Equals(Language, StringComparison.OrdinalIgnoreCase))
                                ?.DisplayName;
                            attributes.Add(StringHelper.FirstToUpper(fullLanguage ?? Language));
                        }
                        else
                        {
                            attributes.Add(string.IsNullOrEmpty(LocalizedUndefined) ? "Und" : LocalizedUndefined);
                        }

                        if (IsDefault)
                        {
                            attributes.Add(string.IsNullOrEmpty(LocalizedDefault) ? "Default" : LocalizedDefault);
                        }

                        if (IsForced)
                        {
                            attributes.Add(string.IsNullOrEmpty(LocalizedForced) ? "Forced" : LocalizedForced);
                        }

                        if (!string.IsNullOrEmpty(Codec))
                        {
                            attributes.Add(Codec.ToUpperInvariant());
                        }

                        if (IsExternal)
                        {
                            attributes.Add(string.IsNullOrEmpty(LocalizedExternal) ? "External" : LocalizedExternal);
                        }

                        if (!string.IsNullOrEmpty(Title))
                        {
                            var result = new StringBuilder(Title);
                            foreach (var tag in attributes)
                            {
                                // Keep Tags that are not already in Title.
                                if (!Title.Contains(tag, StringComparison.OrdinalIgnoreCase))
                                {
                                    result.Append(" - ").Append(tag);
                                }
                            }

                            return result.ToString();
                        }

                        return string.Join(" - ", attributes);
                    }

                    default:
                        return null;
                }
            }
        }

        public string NalLengthSize { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is interlaced.
        /// </summary>
        /// <value><c>true</c> if this instance is interlaced; otherwise, <c>false</c>.</value>
        public bool IsInterlaced { get; set; }

        public bool? IsAVC { get; set; }

        /// <summary>
        /// Gets or sets the channel layout.
        /// </summary>
        /// <value>The channel layout.</value>
        public string ChannelLayout { get; set; }

        /// <summary>
        /// Gets or sets the bit rate.
        /// </summary>
        /// <value>The bit rate.</value>
        public int? BitRate { get; set; }

        /// <summary>
        /// Gets or sets the bit depth.
        /// </summary>
        /// <value>The bit depth.</value>
        public int? BitDepth { get; set; }

        /// <summary>
        /// Gets or sets the reference frames.
        /// </summary>
        /// <value>The reference frames.</value>
        public int? RefFrames { get; set; }

        /// <summary>
        /// Gets or sets the length of the packet.
        /// </summary>
        /// <value>The length of the packet.</value>
        public int? PacketLength { get; set; }

        /// <summary>
        /// Gets or sets the channels.
        /// </summary>
        /// <value>The channels.</value>
        public int? Channels { get; set; }

        /// <summary>
        /// Gets or sets the sample rate.
        /// </summary>
        /// <value>The sample rate.</value>
        public int? SampleRate { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is default.
        /// </summary>
        /// <value><c>true</c> if this instance is default; otherwise, <c>false</c>.</value>
        public bool IsDefault { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is forced.
        /// </summary>
        /// <value><c>true</c> if this instance is forced; otherwise, <c>false</c>.</value>
        public bool IsForced { get; set; }

        /// <summary>
        /// Gets or sets the height.
        /// </summary>
        /// <value>The height.</value>
        public int? Height { get; set; }

        /// <summary>
        /// Gets or sets the width.
        /// </summary>
        /// <value>The width.</value>
        public int? Width { get; set; }

        /// <summary>
        /// Gets or sets the average frame rate.
        /// </summary>
        /// <value>The average frame rate.</value>
        public float? AverageFrameRate { get; set; }

        /// <summary>
        /// Gets or sets the real frame rate.
        /// </summary>
        /// <value>The real frame rate.</value>
        public float? RealFrameRate { get; set; }

        /// <summary>
        /// Gets or sets the profile.
        /// </summary>
        /// <value>The profile.</value>
        public string Profile { get; set; }

        /// <summary>
        /// Gets or sets the type.
        /// </summary>
        /// <value>The type.</value>
        public MediaStreamType Type { get; set; }

        /// <summary>
        /// Gets or sets the aspect ratio.
        /// </summary>
        /// <value>The aspect ratio.</value>
        public string AspectRatio { get; set; }

        /// <summary>
        /// Gets or sets the index.
        /// </summary>
        /// <value>The index.</value>
        public int Index { get; set; }

        /// <summary>
        /// Gets or sets the score.
        /// </summary>
        /// <value>The score.</value>
        public int? Score { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is external.
        /// </summary>
        /// <value><c>true</c> if this instance is external; otherwise, <c>false</c>.</value>
        public bool IsExternal { get; set; }

        /// <summary>
        /// Gets or sets the method.
        /// </summary>
        /// <value>The method.</value>
        public SubtitleDeliveryMethod? DeliveryMethod { get; set; }

        /// <summary>
        /// Gets or sets the delivery URL.
        /// </summary>
        /// <value>The delivery URL.</value>
        public string DeliveryUrl { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether this instance is external URL.
        /// </summary>
        /// <value><c>null</c> if [is external URL] contains no value, <c>true</c> if [is external URL]; otherwise, <c>false</c>.</value>
        public bool? IsExternalUrl { get; set; }

        public bool IsTextSubtitleStream
        {
            get
            {
                if (Type != MediaStreamType.Subtitle)
                {
                    return false;
                }

                if (string.IsNullOrEmpty(Codec) && !IsExternal)
                {
                    return false;
                }

                return IsTextFormat(Codec);
            }
        }

        /// <summary>
        /// Gets or sets a value indicating whether [supports external stream].
        /// </summary>
        /// <value><c>true</c> if [supports external stream]; otherwise, <c>false</c>.</value>
        public bool SupportsExternalStream { get; set; }

        /// <summary>
        /// Gets or sets the filename.
        /// </summary>
        /// <value>The filename.</value>
        public string Path { get; set; }

        /// <summary>
        /// Gets or sets the pixel format.
        /// </summary>
        /// <value>The pixel format.</value>
        public string PixelFormat { get; set; }

        /// <summary>
        /// Gets or sets the level.
        /// </summary>
        /// <value>The level.</value>
        public double? Level { get; set; }

        /// <summary>
        /// Gets or sets whether this instance is anamorphic.
        /// </summary>
        /// <value><c>true</c> if this instance is anamorphic; otherwise, <c>false</c>.</value>
        public bool? IsAnamorphic { get; set; }

        internal string GetResolutionText()
        {
            if (!Width.HasValue || !Height.HasValue)
            {
                return null;
            }

            return Width switch
            {
                <= 720 when Height <= 480 => IsInterlaced ? "480i" : "480p",
                // 720x576 (PAL) (768 when rescaled for square pixels)
                <= 768 when Height <= 576 => IsInterlaced ? "576i" : "576p",
                // 960x540 (sometimes 544 which is multiple of 16)
                <= 960 when Height <= 544 => IsInterlaced ? "540i" : "540p",
                // 1280x720
                <= 1280 when Height <= 962 => IsInterlaced ? "720i" : "720p",
                // 1920x1080
                <= 1920 when Height <= 1440 => IsInterlaced ? "1080i" : "1080p",
                // 4K
                <= 4096 when Height <= 3072 => "4K",
                // 8K
                <= 8192 when Height <= 6144 => "8K",
                _ => null
            };
        }

        public static bool IsTextFormat(string format)
        {
            string codec = format ?? string.Empty;

            // sub = external .sub file

            return !codec.Contains("pgs", StringComparison.OrdinalIgnoreCase) &&
                   !codec.Contains("dvd", StringComparison.OrdinalIgnoreCase) &&
                   !codec.Contains("dvbsub", StringComparison.OrdinalIgnoreCase) &&
                   !string.Equals(codec, "sub", StringComparison.OrdinalIgnoreCase) &&
                   !string.Equals(codec, "dvb_subtitle", StringComparison.OrdinalIgnoreCase);
        }

        public bool SupportsSubtitleConversionTo(string toCodec)
        {
            if (!IsTextSubtitleStream)
            {
                return false;
            }

            var fromCodec = Codec;

            // Can't convert from this
            if (string.Equals(fromCodec, "ass", StringComparison.OrdinalIgnoreCase))
            {
                return false;
            }

            if (string.Equals(fromCodec, "ssa", StringComparison.OrdinalIgnoreCase))
            {
                return false;
            }

            // Can't convert to this
            if (string.Equals(toCodec, "ass", StringComparison.OrdinalIgnoreCase))
            {
                return false;
            }

            if (string.Equals(toCodec, "ssa", StringComparison.OrdinalIgnoreCase))
            {
                return false;
            }

            return true;
        }

        public (string VideoRange, string VideoRangeType) getVideoColorRange()
        {
            if (Type != MediaStreamType.Video)
            {
                return (null, null);
            }

            var colorTransfer = ColorTransfer;

            if (string.Equals(colorTransfer, "smpte2084", StringComparison.OrdinalIgnoreCase))
            {
                return ("HDR", "HDR10");
            }

            if (string.Equals(colorTransfer, "arib-std-b67", StringComparison.OrdinalIgnoreCase))
            {
                return ("HDR", "HLG");
            }

            // For some Dolby Vision files, no color transfer is provided, so check the codec

            var codecTag = CodecTag;

            if (string.Equals(codecTag, "dovi", StringComparison.OrdinalIgnoreCase)
                || string.Equals(codecTag, "dvh1", StringComparison.OrdinalIgnoreCase)
                || string.Equals(codecTag, "dvhe", StringComparison.OrdinalIgnoreCase)
                || string.Equals(codecTag, "dav1", StringComparison.OrdinalIgnoreCase))
            {
                return ("HDR", "DOVI");
            }

            return ("SDR", "SDR");
        }
    }
}