using System.IO;
using System.Text.Json;
using System.Text.Json.Serialization;
using EmbyToolbox.Models;

namespace EmbyToolbox.Services;

/// <summary>Сохранение и загрузка очереди конвертации (.conv_setup, JSON).</summary>
public static class ConversionQueueSetupPersistence
{
    public const string FileExtension = ".conv_setup";

    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        WriteIndented = true,
        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
        Converters = { new JsonStringEnumConverter(JsonNamingPolicy.CamelCase) }
    };

    public static string GetQueueSetupsDirectory()
    {
        var dir = Path.Combine(
            Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
            "EmbyToolbox",
            "QueueSetups");
        Directory.CreateDirectory(dir);
        return dir;
    }

    public static string AllocateAutoSavePath()
    {
        var stamp = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss", System.Globalization.CultureInfo.InvariantCulture);
        return Path.Combine(GetQueueSetupsDirectory(), $"conversion-setup-{stamp}{FileExtension}");
    }

    public static void SaveToPath(string path, ConversionQueueSetupRoot document)
    {
        var dir = Path.GetDirectoryName(path);
        if (!string.IsNullOrEmpty(dir))
        {
            Directory.CreateDirectory(dir);
        }

        var json = JsonSerializer.Serialize(document, JsonOptions);
        File.WriteAllText(path, json, System.Text.UTF8Encoding.UTF8);
    }

    public static ConversionQueueSetupRoot LoadFromPath(string path)
    {
        var json = File.ReadAllText(path, System.Text.UTF8Encoding.UTF8);
        var doc = JsonSerializer.Deserialize<ConversionQueueSetupRoot>(json, JsonOptions)
                  ?? throw new InvalidDataException("Пустой или некорректный .conv_setup");
        return doc;
    }
}

public sealed class ConversionQueueSetupRoot
{
    public int SchemaVersion { get; set; } = 1;
    public DateTime SavedAtUtc { get; set; }
    public string? DefaultQueueProfile { get; set; }
    public bool CopyPreviousTrackSettings { get; set; }
    public bool DisableSubtitleDefault { get; set; }
    public ConversionFormOptionsSnapshot FormOptions { get; set; } = new();
    public List<ConversionProfileSettingsEntry> Profiles { get; set; } = [];
    public List<ConversionQueueTaskPersistModel> Tasks { get; set; } = [];
}

public sealed class ConversionFormOptionsSnapshot
{
    public List<string> ContainerOptions { get; set; } = [];
    public List<string> VideoCodecOptions { get; set; } = [];
    public List<string> PixelFormatOptions { get; set; } = [];
    public List<string> ResolutionOptions { get; set; } = [];
    public List<string> FpsOptions { get; set; } = [];
    public List<string> AudioBitrateKbps { get; set; } = [];
    public List<string> VideoBitrateModeOptions { get; set; } = [];
}

public sealed class ConversionQueueTaskPersistModel
{
    public string FullPath { get; set; } = "";
    public string? SnapshotScopeBatchRoot { get; set; }
    public int OrderNumber { get; set; }
    public string Profile { get; set; } = "Emby";
    public string PlanSummary { get; set; } = "";
    public string Status { get; set; } = ConversionQueueStatus.Pending;
    public int Progress { get; set; }
    public bool IsManuallyEdited { get; set; }
    public bool IsProcessed { get; set; }
    public bool ProcessedInCurrentRun { get; set; }
    public string? LastRunId { get; set; }
    public string? ErrorMessage { get; set; }
    public string? ErrorDetails { get; set; }
    public int FileSizeMb { get; set; }
    public bool HasFfprobeAudioSummary { get; set; }
    public int FfprobeAudioCount { get; set; }
    public int? FfprobeAudioSizeMb { get; set; }
    public bool FfprobeAudioSizePartial { get; set; }
    public MediaAnalysisResult? MediaAnalysis { get; set; }
    public List<SidecarFilePersistModel>? Sidecars { get; set; }
    public List<ExternalAudioFilePersistModel>? ExternalAudioFiles { get; set; }
    public ConversionTaskOverridePersistModel? Overrides { get; set; }
}

public sealed class SidecarFilePersistModel
{
    public string FullPath { get; set; } = "";
    public bool IsAudio { get; set; }
    public bool IsSubtitle { get; set; }
    public bool IsFont { get; set; }

    public static SidecarFilePersistModel From(SidecarFile s) =>
        new()
        {
            FullPath = s.FullPath,
            IsAudio = s.IsAudio,
            IsSubtitle = s.IsSubtitle,
            IsFont = s.IsFont
        };

    public SidecarFile ToModel() => new(FullPath, IsAudio, IsSubtitle, IsFont);
}

public sealed class ExternalAudioStreamPersistModel
{
    public string FileFullPath { get; set; } = "";
    public int StreamOrdinal { get; set; }
    public string CodecName { get; set; } = "?";
    public string? TitleFromProbe { get; set; }
    public int? Channels { get; set; }
    public int? SampleRateHz { get; set; }
    public long? BitRateBps { get; set; }

    public static ExternalAudioStreamPersistModel From(ExternalAudioStream s) =>
        new()
        {
            FileFullPath = s.FileFullPath,
            StreamOrdinal = s.StreamOrdinal,
            CodecName = s.CodecName,
            TitleFromProbe = s.TitleFromProbe,
            Channels = s.Channels,
            SampleRateHz = s.SampleRateHz,
            BitRateBps = s.BitRateBps
        };

    public ExternalAudioStream ToModel() =>
        new()
        {
            FileFullPath = FileFullPath,
            StreamOrdinal = StreamOrdinal,
            CodecName = CodecName,
            TitleFromProbe = TitleFromProbe,
            Channels = Channels,
            SampleRateHz = SampleRateHz,
            BitRateBps = BitRateBps
        };
}

public sealed class ExternalAudioFilePersistModel
{
    public string FullPath { get; set; } = "";
    public List<ExternalAudioStreamPersistModel> Streams { get; set; } = [];

    public static ExternalAudioFilePersistModel From(ExternalAudioFile f) =>
        new()
        {
            FullPath = f.FullPath,
            Streams = f.Streams.Select(ExternalAudioStreamPersistModel.From).ToList()
        };

    public ExternalAudioFile ToModel() =>
        new(FullPath, Streams.Select(s => s.ToModel()).ToList());
}

public sealed class ConversionTaskOverridePersistModel
{
    public string TargetContainer { get; set; } = "";
    public string TargetVideo { get; set; } = "";
    public string TargetPixelFormat { get; set; } = "";
    public string TargetResolution { get; set; } = "";
    public string TargetFps { get; set; } = "";
    public string TargetAudioBitrate { get; set; } = "256 kbps";
    public string TargetVideoBitrateMode { get; set; } = VideoBitratePolicy.Auto;
    public double? TargetVideoBitrateMbps { get; set; }
    public List<TrackOverrideEntryPersistModel> TrackOverrides { get; set; } = [];

    public static ConversionTaskOverridePersistModel From(ConversionTaskOverride o)
    {
        var m = new ConversionTaskOverridePersistModel
        {
            TargetContainer = o.TargetContainer,
            TargetVideo = o.TargetVideo,
            TargetPixelFormat = o.TargetPixelFormat,
            TargetResolution = o.TargetResolution,
            TargetFps = o.TargetFps,
            TargetAudioBitrate = o.TargetAudioBitrate,
            TargetVideoBitrateMode = o.TargetVideoBitrateMode,
            TargetVideoBitrateMbps = o.TargetVideoBitrateMbps
        };
        foreach (var t in o.TrackOverrides)
        {
            m.TrackOverrides.Add(TrackOverrideEntryPersistModel.From(t));
        }

        return m;
    }

    public void ApplyTo(ConversionTaskOverride target)
    {
        target.TargetContainer = TargetContainer;
        target.TargetVideo = TargetVideo;
        target.TargetPixelFormat = TargetPixelFormat;
        target.TargetResolution = TargetResolution;
        target.TargetFps = TargetFps;
        target.TargetAudioBitrate = TargetAudioBitrate;
        target.TargetVideoBitrateMode = TargetVideoBitrateMode;
        target.TargetVideoBitrateMbps = TargetVideoBitrateMbps;
        target.TrackOverrides.Clear();
        foreach (var t in TrackOverrides)
        {
            target.TrackOverrides.Add(t.ToEntry());
        }
    }
}

public sealed class TrackOverrideEntryPersistModel
{
    public int StreamIndex { get; set; }
    public string? ExternalPath { get; set; }
    public SourceKind Source { get; set; }
    public MediaStreamKind StreamKind { get; set; }
    public TrackActionKind Action { get; set; }
    public bool? Default { get; set; }
    public string? Language { get; set; }
    public string? Title { get; set; }
    public string? AudioBitrateKbps { get; set; }
    public int ExternalAudioStreamOrdinal { get; set; }
    public string? ExternalStreamCodec { get; set; }
    public string? ExternalStreamDetails { get; set; }
    public int SameFileExternalAudioStreamCount { get; set; } = 1;
    public string? ExternalFfprobeTitle { get; set; }

    public static TrackOverrideEntryPersistModel From(TrackOverrideEntry t) =>
        new()
        {
            StreamIndex = t.StreamIndex,
            ExternalPath = t.ExternalPath,
            Source = t.Source,
            StreamKind = t.StreamKind,
            Action = t.Action,
            Default = t.Default,
            Language = t.Language,
            Title = t.Title,
            AudioBitrateKbps = t.AudioBitrateKbps,
            ExternalAudioStreamOrdinal = t.ExternalAudioStreamOrdinal,
            ExternalStreamCodec = t.ExternalStreamCodec,
            ExternalStreamDetails = t.ExternalStreamDetails,
            SameFileExternalAudioStreamCount = t.SameFileExternalAudioStreamCount,
            ExternalFfprobeTitle = t.ExternalFfprobeTitle
        };

    public TrackOverrideEntry ToEntry() =>
        new()
        {
            StreamIndex = StreamIndex,
            ExternalPath = ExternalPath,
            Source = Source,
            StreamKind = StreamKind,
            Action = Action,
            Default = Default,
            Language = Language,
            Title = Title,
            AudioBitrateKbps = AudioBitrateKbps,
            ExternalAudioStreamOrdinal = ExternalAudioStreamOrdinal,
            ExternalStreamCodec = ExternalStreamCodec,
            ExternalStreamDetails = ExternalStreamDetails,
            SameFileExternalAudioStreamCount = SameFileExternalAudioStreamCount,
            ExternalFfprobeTitle = ExternalFfprobeTitle
        };
}