using System.Text.Json;

namespace VoiceCat.App.Notifications;

/// <summary>
/// User preferences for event sounds and spoken (text-to-speech) feedback. Persisted to
/// %AppData%\VoiceCat\feedback.json — same pattern as <see cref="Models.ServerListStore"/>:
/// a missing or corrupt file yields defaults rather than throwing.
/// </summary>
public sealed class FeedbackSettings
{
    /// <summary>Master switch for event sound effects.</summary>
    public bool Sounds { get; set; } = true;

    /// <summary>Master switch for spoken announcements (Prismatoid TTS). Off by default.</summary>
    public bool Speech { get; set; } = false;

    /// <summary>Sound-effects volume, 0..1. 0 mutes effects (SoundPlayer has no gain control,
    /// so this is honoured as a mute gate — see <see cref="SoundPlayerPool"/>).</summary>
    public float Volume { get; set; } = 1.0f;

    /// <summary>Play va_start/va_stop for your own voice-activity transitions. Off by default
    /// (fires on every utterance — noisy).</summary>
    public bool SelfTalkSounds { get; set; } = false;

    /// <summary>Play the ptt cue when push-to-talk is engaged. Off by default.</summary>
    public bool PttSound { get; set; } = false;

    private static readonly JsonSerializerOptions JsonOptions = new() { WriteIndented = true };

    private static string AppDataDir => Path.Combine(
        Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "VoiceCat");

    private static string FilePath => Path.Combine(AppDataDir, "feedback.json");

    public static FeedbackSettings Load()
    {
        try
        {
            if (!File.Exists(FilePath)) return new FeedbackSettings();
            string json = File.ReadAllText(FilePath);
            return JsonSerializer.Deserialize<FeedbackSettings>(json) ?? new FeedbackSettings();
        }
        catch
        {
            return new FeedbackSettings();
        }
    }

    public void Save()
    {
        Directory.CreateDirectory(AppDataDir);
        File.WriteAllText(FilePath, JsonSerializer.Serialize(this, JsonOptions));
    }
}