using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text.Json;
using System.Diagnostics;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using SlamCross.Models;
using SlamCross.Services;

namespace SlamCross.ViewModels;

public partial class TrackItem : ObservableObject
{
    [ObservableProperty] private bool _isPlaying;
    public string Name { get; set; } = "";
    public string Hotkey { get; set; } = "";
    public string Volume { get; set; } = "";
    public string Trimmed { get; set; } = "";
    public string Tags { get; set; } = "";
    public int Index { get; set; }
}

public partial class MainWindowViewModel : ViewModelBase
{
    private readonly SettingsService _settings = new();
    private readonly IAudioService _audio = AudioServiceFactory.Create();

    private SourceGame _game = null!;
    private string? _steamAppsPath;
    private CancellationTokenSource? _pollCts;

    [ObservableProperty] private ObservableCollection<TrackItem> _tracks = new();
    [ObservableProperty] private ObservableCollection<AudioDevice> _outputDevices = new();
    [ObservableProperty] private ObservableCollection<AudioDevice> _inputDevices = new();

    [ObservableProperty] private AudioDevice? _selectedVirtualInCable;
    [ObservableProperty] private AudioDevice? _selectedVirtualOutCable;
    [ObservableProperty] private AudioDevice? _selectedRegularMic;

    [ObservableProperty] private string _statusText = "Status: Idle.";
    [ObservableProperty] private bool _isRunning;
    [ObservableProperty] private bool _interfaceEnabled = true;
    [ObservableProperty] private double _progress;
    [ObservableProperty] private double _progressMax = 1;
    [ObservableProperty] private string _startButtonText = "Start";
    [ObservableProperty] private string _playKeyButtonText = "Play key: (change)";
    [ObservableProperty] private bool _isStreaming;
    [ObservableProperty] private string _streamButtonText = "Stream to Mic";
    [ObservableProperty] private string _streamStatusText = "";
    [ObservableProperty] private int _globalVolume = 50;

    public AppSettings Settings => _settings.Settings;

    public MainWindowViewModel()
    {
        _settings.Load();
        _globalVolume = Settings.GlobalVolume;
        InitGame();
        LoadAudioDevices();
        RefreshTracks();
        RefreshPlayKey();

        if (Settings.StartEnabled)
            _ = StartPollAsync();
    }

    partial void OnGlobalVolumeChanged(int value)
    {
        Settings.GlobalVolume = value;
        _settings.Save();
    }

    private void InitGame()
    {
        var sep = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? '\\' : '/';

        _game = new SourceGame
        {
            Name = "Counter-Strike 2",
            Id = 730,
            Directory = $"common{sep}Counter-Strike Global Offensive{sep}",
            ToCfg = $"game{sep}csgo{sep}cfg{sep}",
            LibraryName = $"game{sep}csgo{sep}",
            ExeName = "cs2",
            SampleRate = 22050,
            VoiceFadeOut = false
        };
        _game.Blacklist.AddRange(new[]
        {
            "attack","attack2","autobuy","back","buy","buyammo1","buyammo2","buymenu","callvote",
            "cancelselect","cheer","compliment","coverme","drop","duck","enemydown","enemyspot",
            "fallback","followme","forward","getout","go","holdpos","inposition","invnext","invprev",
            "jump","lastinv","messagemode","messagemode2","moveleft","moveright","mute","negative",
            "quit","radio1","radio2","radio3","rebuy","regroup","reload","reporting_in",
            "reporting_in_team_only","roger","sectorclear","showscores","slot1","slot10","slot2",
            "slot3","slot4","slot5","slot6","slot7","slot8","slot9","speed","sticktog","takepoint",
            "takingfire","teammenu","thanks","toggleconsole","use","voicerecord",
            "say","say_team","exec","echo","alias","bind","unbind","unbindall","kill","explode",
            "disconnect","retry","status","map","volume","stop","play","record","screenshot",
            "host_writeconfig","voice_loopback","con_enable","clear","help","find"
        });
    }

    private void LoadAudioDevices()
    {
        OutputDevices.Clear();
        InputDevices.Clear();

        foreach (var d in _audio.GetOutputDevices())
            OutputDevices.Add(d);
        foreach (var d in _audio.GetInputDevices())
            InputDevices.Add(d);

        if (Settings.VirtualMicInDeviceIndex >= 0 && Settings.VirtualMicInDeviceIndex < OutputDevices.Count)
            SelectedVirtualInCable = OutputDevices[Settings.VirtualMicInDeviceIndex];

        if (Settings.VirtualMicOutDeviceIndex >= 0 && Settings.VirtualMicOutDeviceIndex < InputDevices.Count)
            SelectedVirtualOutCable = InputDevices[Settings.VirtualMicOutDeviceIndex];

        if (Settings.RegularMicDeviceIndex >= 0 && Settings.RegularMicDeviceIndex < InputDevices.Count)
            SelectedRegularMic = InputDevices[Settings.RegularMicDeviceIndex];
    }

    partial void OnSelectedVirtualInCableChanged(AudioDevice? value)
    {
        if (value == null) return;
        Settings.VirtualMicInDeviceIndex = value.Index;
        Settings.VirtualMicInDeviceName = value.Name;
        Settings.VirtualMicInPactlId = value.PactlId;
        _settings.Save();
    }

    partial void OnSelectedVirtualOutCableChanged(AudioDevice? value)
    {
        if (value == null) return;
        Settings.VirtualMicOutDeviceIndex = value.Index;
        Settings.VirtualMicOutDeviceName = value.Name;
        Settings.VirtualMicOutPactlId = value.PactlId;
        _settings.Save();
    }

    partial void OnSelectedRegularMicChanged(AudioDevice? value)
    {
        if (value == null) return;
        Settings.RegularMicDeviceIndex = value.Index;
        Settings.RegularMicDeviceName = value.Name;
        Settings.RegularMicPactlId = value.PactlId;
        _settings.Save();
    }

    public void RefreshTracks()
    {
        if (!Directory.Exists(_game.LibraryName))
            Directory.CreateDirectory(_game.LibraryName);

        _game.Tracks.Clear();
        foreach (var f in Directory.GetFiles(_game.LibraryName))
        {
            if (Path.GetExtension(f) == _game.FileExtension)
                _game.Tracks.Add(new Track { Name = Path.GetFileNameWithoutExtension(f) });
        }

        CreateTags(_game);
        TrackSettingsService.Load(_game);
        TrackSettingsService.Save(_game);
        RebuildTrackList();
    }

    private void RebuildTrackList()
    {
        Tracks.Clear();
        for (int i = 0; i < _game.Tracks.Count; i++)
        {
            var t = _game.Tracks[i];
            Tracks.Add(new TrackItem
            {
                Index = i,
                Name = t.Name,
                Hotkey = t.Hotkey,
                Volume = t.Volume + "%",
                Trimmed = t.EndPos > 0 ? "Yes" : "",
                Tags = t.Tags.Count > 0 ? "\"" + string.Join("\", \"", t.Tags) + "\"" : ""
            });
        }
    }

    public async Task StartPollAsync()
    {
        IsRunning = true;
        StartButtonText = "Stop";
        InterfaceEnabled = false;

        _pollCts = new CancellationTokenSource();
        try { await Task.Run(() => PollLoop(_pollCts.Token)); }
        catch (OperationCanceledException) { }
        catch (Exception ex) { ShowError(ex.Message); }
        finally
        {
            IsRunning = false;
            StartButtonText = "Start";
            InterfaceEnabled = true;
            StatusText = "Status: Idle.";
            RebuildTrackList();
        }
    }

    public void StopPoll()
    {
        _pollCts?.Cancel();
        _audio.Stop();
    }

    private void PollLoop(CancellationToken ct)
    {
        StatusText = "Status: Searching...";

        if (!Settings.OverrideFolders)
        {
            while (!ct.IsCancellationRequested)
            {
                _steamAppsPath = GameLocatorService.FindSteamAppsPath(_game.ExeName);
                if (!string.IsNullOrEmpty(_steamAppsPath) && Directory.Exists(_steamAppsPath))
                    break;
                Thread.Sleep(_game.PollInterval);
            }
        }
        else
        {
            _steamAppsPath = Settings.SteamAppsOverride;
            if (!Directory.Exists(_steamAppsPath))
                throw new Exception("Steam apps folder does not exist. Check Settings.");
        }

        ct.ThrowIfCancellationRequested();
        CfgService.WriteCfgFiles(_game, _steamAppsPath!, _settings.Settings);
        StatusText = "Status: Working.";

        var virtualMicOutPactl = string.IsNullOrEmpty(Settings.VirtualMicOutPactlId) ? "VirtualMic.monitor" : Settings.VirtualMicOutPactlId;

        var cs2SrcOutputIds = FindCs2SourceOutputIds();
        DebugLog($"CS2 pactl source-outputs: [{string.Join(",", cs2SrcOutputIds)}] moving to {virtualMicOutPactl}");
        MoveCs2SourceOutputs(cs2SrcOutputIds, virtualMicOutPactl);

        var userDataDir = Settings.OverrideFolders && !string.IsNullOrEmpty(Settings.UserDataOverride)
            ? Settings.UserDataOverride
            : FindUserDataDir(_steamAppsPath!);
        var startTime = DateTime.UtcNow;
        var seenMtimes = new Dictionary<string, DateTime>();

        // seed from the newest existing vcfg so a stale bind from a previous session doesn't fire
        string? lastRelayValue = null;
        if (userDataDir != null && Directory.Exists(userDataDir))
        {
            var newest = FindKeyVcfgs(userDataDir).OrderByDescending(File.GetLastWriteTimeUtc).FirstOrDefault();
            if (newest != null)
                try { lastRelayValue = ParseRelayCommand(File.ReadAllText(newest), Settings.RelayKey); } catch { }
        }

        DebugLog($"SLAM started. userDataDir={userDataDir ?? "null"} startTime={startTime:O} lastRelayValue={lastRelayValue}");

        while (!ct.IsCancellationRequested)
        {
            try
            {
                if (userDataDir != null && Directory.Exists(userDataDir))
                {
                    foreach (var vcfg in FindKeyVcfgs(userDataDir))
                    {
                        var mtime = File.GetLastWriteTimeUtc(vcfg);
                        if (mtime <= startTime) continue;
                        if (seenMtimes.TryGetValue(vcfg, out var lastSeen) && mtime <= lastSeen) continue;
                        seenMtimes[vcfg] = mtime;

                        DebugLog($"New vcfg: {vcfg} mtime={mtime:O}");
                        var content = File.ReadAllText(vcfg);
                        var command = ParseRelayCommand(content, Settings.RelayKey);
                        DebugLog($"  relayKey={Settings.RelayKey} command={command}");

                        // unchanged bind value means CS2 rewrote the file on its own (round start, buy menu)
                        if (command == lastRelayValue) continue;
                        lastRelayValue = command;

                        int trackNum = ParseTrackNumber(command);
                        if (trackNum > 0)
                        {
                            var idx = trackNum - 1;
                            if (idx >= 0 && idx < _game.Tracks.Count)
                            {
                                // CS2 voice stream (SDL Application, media.role=game) only exists while +voicerecord is active.
                                // host_writeconfig runs before +voicerecord, so the stream may not exist yet - poll briefly.
                                var freshSrcIds = FindCs2SourceOutputIds();
                                if (freshSrcIds.Count == 0) { Thread.Sleep(150); freshSrcIds = FindCs2SourceOutputIds(); }
                                if (freshSrcIds.Count == 0) { Thread.Sleep(150); freshSrcIds = FindCs2SourceOutputIds(); }
                                DebugLog($"  relay: game-capture source-outputs [{string.Join(",", freshSrcIds)}] -> {virtualMicOutPactl}");
                                MoveCs2SourceOutputs(freshSrcIds, virtualMicOutPactl);

                                PlayTrack(idx);
                                Avalonia.Threading.Dispatcher.UIThread.Post(() =>
                                {
                                    foreach (var ti in Tracks) ti.IsPlaying = false;
                                    if (idx < Tracks.Count) Tracks[idx].IsPlaying = true;
                                });
                            }
                            // Don't delete remote/ files - they are Steam Cloud data CS2 relies on.
                            // seenMtimes prevents re-processing until the next host_writeconfig.
                            if (!vcfg.Contains("/remote/"))
                            {
                                try { File.Delete(vcfg); seenMtimes.Remove(vcfg); } catch { }
                            }
                        }
                    }
                }
            }
            catch (Exception ex) when (ex.HResult != -2147024864)
            {
                LogError(ex);
            }

            Thread.Sleep(_game.PollInterval);
        }

        _audio.Stop();
        var regularMicPactl = string.IsNullOrEmpty(Settings.RegularMicPactlId) ? "@DEFAULT_SOURCE@" : Settings.RegularMicPactlId;
        MoveCs2SourceOutputs(FindCs2SourceOutputIds(), regularMicPactl);
        if (!string.IsNullOrEmpty(_steamAppsPath))
            CfgService.DeleteCfgFiles(_game, _steamAppsPath);
    }

    private static List<int> FindCs2SourceOutputIds()
    {
        var ids = new List<int>();
        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) return ids;
        try
        {
            var psi = new ProcessStartInfo("pactl") { Arguments = "--format=json list source-outputs", UseShellExecute = false, RedirectStandardOutput = true, CreateNoWindow = true };
            using var proc = Process.Start(psi)!;
            var json = proc.StandardOutput.ReadToEnd();
            proc.WaitForExit();
            using var doc = JsonDocument.Parse(json);
            foreach (var so in doc.RootElement.EnumerateArray())
            {
                if (!so.TryGetProperty("properties", out var props)) continue;
                var mediaRole = props.TryGetProperty("media.role", out var r) ? r.GetString() : null;
                var mediaCategory = props.TryGetProperty("media.category", out var c) ? c.GetString() : null;
                var binary = props.TryGetProperty("application.process.binary", out var b) ? b.GetString() : null;
                // CS2 voice capture appears as "SDL Application" with media.role=game, media.category=Capture
                if ((mediaRole == "game" && mediaCategory == "Capture") || binary == "cs2")
                    if (so.TryGetProperty("index", out var idx)) ids.Add(idx.GetInt32());
            }
        }
        catch (Exception ex) { DebugLog($"FindCs2SourceOutputIds error: {ex.Message}"); }
        return ids;
    }

    private static void MoveCs2SourceOutputs(IEnumerable<int> sourceOutputIds, string pactlSourceName)
    {
        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) return;
        foreach (var id in sourceOutputIds)
        {
            try
            {
                var args = $"move-source-output {id} {pactlSourceName}";
                var psi = new ProcessStartInfo("pactl", args) { UseShellExecute = false, CreateNoWindow = true };
                Process.Start(psi)?.WaitForExit();
                DebugLog($"pactl {args}");
            }
            catch { }
        }
    }

    private static string? FindUserDataDir(string steamAppsPath)
    {
        var steamDir = Path.GetDirectoryName(steamAppsPath);
        if (steamDir == null) return null;

        var candidate = Path.Combine(steamDir, "userdata");
        if (Directory.Exists(candidate)) return candidate;

        if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
        {
            var home = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
            candidate = Path.Combine(home, ".local/share/Steam/userdata");
            if (Directory.Exists(candidate)) return candidate;
        }

        return null;
    }

    private List<string> FindKeyVcfgs(string userDataDir)
    {
        // CS2 writes key bindings to remote/ (Steam Cloud) and optionally local/cfg/
        var candidates = new List<string>();
        foreach (var userDir in Directory.GetDirectories(userDataDir))
        {
            var gameUserDir = Path.Combine(userDir, _game.Id.ToString());
            if (!Directory.Exists(gameUserDir)) continue;

            var remoteKeys = Path.Combine(gameUserDir, "remote", "cs2_user_keys.vcfg");
            if (File.Exists(remoteKeys)) candidates.Add(remoteKeys);
            var localCfg = Path.Combine(gameUserDir, "local", "cfg");
            if (Directory.Exists(localCfg))
                candidates.AddRange(Directory.GetFiles(localCfg, "*keys*.vcfg"));
        }
        return candidates;
    }

    private static string ParseRelayCommand(string cfgContent, string relayKey)
    {
        var pattern = $"\"{Regex.Escape(relayKey)}\"\\s+\"(.*?)\"";
        var m = Regex.Match(cfgContent, pattern, RegexOptions.IgnoreCase);
        return m.Success ? m.Groups[1].Value : "";
    }

    private static int ParseTrackNumber(string relayValue)
    {
        var m = Regex.Match(relayValue, @"^slam_r_(\d+)_[ab]$");
        if (m.Success) return int.Parse(m.Groups[1].Value);
        return int.TryParse(relayValue, out var n) ? n : 0; // plain number from an old slam.cfg
    }

    public void PlayTrack(int index)
    {
        DebugLog($"PlayTrack({index}) trackCount={_game.Tracks.Count}");
        if (index < 0 || index >= _game.Tracks.Count) { DebugLog("  -> index out of range"); return; }
        var track = _game.Tracks[index];
        var filePath = Path.Combine(_game.LibraryName, track.Name + _game.FileExtension);
        DebugLog($"  filePath={filePath} exists={File.Exists(filePath)} globalVol={Settings.GlobalVolume} trackVol={track.Volume} pactlId={Settings.VirtualMicInPactlId}");
        if (!File.Exists(filePath)) { DebugLog("  -> file not found"); return; }

        try
        {
            float volume = (Settings.GlobalVolume / 100f) * (track.Volume / 100f);
            _audio.Play(filePath, Settings.VirtualMicInDeviceIndex, volume, track.StartPos, track.EndPos, Settings.VirtualMicInPactlId);
            DebugLog("  -> audio.Play called");

            if (!string.IsNullOrEmpty(_steamAppsPath))
                CfgService.WriteTrackCfgs(_game, _steamAppsPath, track);
        }
        catch (Exception ex)
        {
            LogError(ex);
            ShowError("Playback failed: " + ex.Message);
        }
    }

    public void StreamToMic(int index)
    {
        if (index < 0 || index >= _game.Tracks.Count) return;
        var track = _game.Tracks[index];
        var filePath = Path.Combine(_game.LibraryName, track.Name + _game.FileExtension);
        if (!File.Exists(filePath)) return;

        try
        {
            _audio.Play(filePath, Settings.VirtualMicInDeviceIndex, (Settings.GlobalVolume / 100f) * (track.Volume / 100f), track.StartPos, track.EndPos, Settings.VirtualMicInPactlId);
        }
        catch (Exception ex)
        {
            LogError(ex);
            ShowError("Playback failed: " + ex.Message);
            return;
        }

        IsStreaming = true;
        StreamButtonText = "Stop Stream";
        StreamStatusText = $"Streaming: {track.Name}";

        foreach (var ti in Tracks) ti.IsPlaying = false;
        if (index < Tracks.Count) Tracks[index].IsPlaying = true;
    }

    public void StopStream()
    {
        _audio.Stop();
        IsStreaming = false;
        StreamButtonText = "Stream to Mic";
        StreamStatusText = "";
        foreach (var ti in Tracks) ti.IsPlaying = false;
    }

    public async Task ImportFilesAsync(IEnumerable<string> files, bool deleteSource = false)
    {
        var fileList = files.ToList();
        InterfaceEnabled = false;
        ProgressMax = fileList.Count;
        Progress = 0;

        var failed = new List<string>();
        await Task.Run(() =>
        {
            foreach (var file in fileList)
            {
                try
                {
                    var outFile = Path.Combine(_game.LibraryName,
                        Path.GetFileNameWithoutExtension(file) + ".wav");
                    ConversionService.ConvertToWav(file, outFile, _game.SampleRate, _game.Channels);
                    if (deleteSource) File.Delete(file);
                }
                catch (Exception ex)
                {
                    LogError(ex);
                    failed.Add(Path.GetFileName(file));
                }
                Avalonia.Threading.Dispatcher.UIThread.Post(() => Progress++);
            }
        });

        Progress = 0;
        RefreshTracks();
        InterfaceEnabled = true;

        if (failed.Count > 0)
            ShowError("Conversion complete! Failed: " + string.Join(", ", failed));
    }

    public void DeleteTracks(IEnumerable<int> indices)
    {
        foreach (var idx in indices.OrderByDescending(x => x))
        {
            var t = _game.Tracks[idx];
            var path = Path.Combine(_game.LibraryName, t.Name + _game.FileExtension);
            if (File.Exists(path)) try { File.Delete(path); } catch { }
        }
        RefreshTracks();
    }

    public void SetTrackVolume(IEnumerable<int> indices, int volume)
    {
        foreach (var idx in indices)
            if (idx < _game.Tracks.Count)
                _game.Tracks[idx].Volume = volume;
        TrackSettingsService.Save(_game);
        RefreshTracks();
    }

    public bool SetTrackHotkey(int index, string key)
    {
        if (index < 0 || index >= _game.Tracks.Count) return false;
        if (key.Equals(Settings.PlayKey, StringComparison.OrdinalIgnoreCase) ||
            key.Equals(Settings.RelayKey, StringComparison.OrdinalIgnoreCase))
        { ShowError($"\"{key}\" is used as the play/relay key!"); return false; }
        bool inUse = _game.Tracks.Where((_, i) => i != index).Any(t => t.Hotkey == key);
        if (inUse) { ShowError($"\"{key}\" is already assigned!"); return false; }
        _game.Tracks[index].Hotkey = key;
        TrackSettingsService.Save(_game);
        RefreshTracks();
        return true;
    }

    public void RemoveHotkey(int index)
    {
        if (index < 0 || index >= _game.Tracks.Count) return;
        _game.Tracks[index].Hotkey = "";
        TrackSettingsService.Save(_game);
        RefreshTracks();
    }

    public void SetTrackTrim(int index, int startPos, int endPos)
    {
        if (index < 0 || index >= _game.Tracks.Count) return;
        _game.Tracks[index].StartPos = startPos;
        _game.Tracks[index].EndPos = endPos;
        TrackSettingsService.Save(_game);
        RefreshTracks();
    }

    public void RenameTrack(int index, string newName)
    {
        if (index < 0 || index >= _game.Tracks.Count) return;
        var track = _game.Tracks[index];
        var oldPath = Path.Combine(_game.LibraryName, track.Name + _game.FileExtension);
        var newPath = Path.Combine(_game.LibraryName, newName + _game.FileExtension);
        if (File.Exists(newPath)) { ShowError("A track with that name already exists."); return; }
        try { File.Move(oldPath, newPath); }
        catch (Exception ex) { ShowError("Rename failed: " + ex.Message); return; }
        track.Name = newName;
        TrackSettingsService.Save(_game);
        RefreshTracks();
    }

    public string GetTrackFilePath(int index)
    {
        if (index < 0 || index >= _game.Tracks.Count) return "";
        return Path.Combine(_game.LibraryName, _game.Tracks[index].Name + _game.FileExtension);
    }

    public Track? GetTrack(int index)
        => index >= 0 && index < _game.Tracks.Count ? _game.Tracks[index] : null;

    public void SetPlayKey(string key)
    {
        if (key == Settings.RelayKey) { ShowError("Play key and relay key cannot be the same!"); return; }
        Settings.PlayKey = key;
        _settings.Save();
        PlayKeyButtonText = $"Play key: \"{Settings.PlayKey}\" (change)";
    }

    private void RefreshPlayKey()
    {
        PlayKeyButtonText = $"Play key: \"{Settings.PlayKey}\" (change)";
    }

    private static void CreateTags(SourceGame game)
    {
        var wordMap = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
        var ambiguous = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
        for (int i = 0; i < game.Tracks.Count; i++)
        {
            foreach (var w in game.Tracks[i].Name.Split(' ', '.', '-', '_'))
            {
                // only plain alphanumeric words survive as cfg aliases
                if (w.Length == 0 || w.Length >= 32) continue;
                if (!w.All(char.IsAsciiLetterOrDigit) || w.All(char.IsDigit)) continue;
                if (game.Blacklist.Contains(w.ToLower()) || ambiguous.Contains(w)) continue;

                if (wordMap.TryGetValue(w, out var owner))
                {
                    if (owner != i) { wordMap.Remove(w); ambiguous.Add(w); }
                }
                else wordMap[w] = i;
            }
        }
        foreach (var (word, idx) in wordMap)
            game.Tracks[idx].Tags.Add(word);
    }

    private void LogError(Exception ex)
    {
        if (!Settings.LogError) return;
        File.AppendAllText("errorlog.txt", $"----{DateTime.UtcNow} UTC----\n{ex}\n");
    }

    private const bool DebugLogging = false; // flip to true to log to slam_debug.log

    private static void DebugLog(string msg)
    {
        if (DebugLogging)
            File.AppendAllText("slam_debug.log", $"{DateTime.UtcNow:O} {msg}\n");
    }

    public event Action<string>? ErrorOccurred;
    public void ShowError(string msg) => ErrorOccurred?.Invoke(msg);

    public void SaveSettings() => _settings.Save();
}