using System.IO;
using System.Text.Json;
using Futonizer.Models;

namespace Futonizer.Services;

/// <summary>
/// Loads and saves <see cref="AppSettings"/> as a JSON file stored next to
/// the application executable, so it travels with the app folder.
/// </summary>
public static class SettingsService
{
    private static readonly string SettingsFilePath = Path.Combine(AppContext.BaseDirectory, "settings.json");
    private static readonly JsonSerializerOptions Options = new() { WriteIndented = true };

    public static AppSettings Load()
    {
        try
        {
            if (File.Exists(SettingsFilePath))
            {
                string json = File.ReadAllText(SettingsFilePath);
                var settings = JsonSerializer.Deserialize<AppSettings>(json, Options);
                if (settings is not null)
                    return settings;
            }
        }
        catch
        {
            // Corrupt or unreadable settings file - fall back to defaults.
        }

        return new AppSettings();
    }

    public static void Save(AppSettings settings)
    {
        try
        {
            string json = JsonSerializer.Serialize(settings, Options);
            File.WriteAllText(SettingsFilePath, json);
        }
        catch
        {
            // Best effort - ignore write failures (e.g. read-only install folder).
        }
    }
}