using System.Text.Json;

namespace Snake.Avalonia.Views;

/// <summary>
/// Persists high score to a JSON file in the user's local app data.
/// </summary>
public static class HighScoreManager
{
    private static readonly string FilePath;

    static HighScoreManager()
    {
        var appData = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
        var dir = Path.Combine(appData, "SnakeAvalonia");
        Directory.CreateDirectory(dir);
        FilePath = Path.Combine(dir, "highscore.json");
    }

    public static int Load()
    {
        try
        {
            if (File.Exists(FilePath))
            {
                var json = File.ReadAllText(FilePath);
                var data = JsonSerializer.Deserialize<HighScoreData>(json);
                return data?.Score ?? 0;
            }
        }
        catch
        {
            // Corrupted file — reset
        }

        return 0;
    }

    public static void Save(int score)
    {
        try
        {
            var data = new HighScoreData { Score = score, Date = DateTime.UtcNow.ToString("O") };
            var json = JsonSerializer.Serialize(data);
            File.WriteAllText(FilePath, json);
        }
        catch
        {
            // Silently fail — high score is non-critical
        }
    }

    private sealed class HighScoreData
    {
        public int Score { get; set; }
        public string Date { get; set; } = string.Empty;
    }
}