clipforge/ClipForge/SettingsService.cs

using System;
using System.IO;
using System.Text.Json;

namespace ClipForge
{
    public class AppSettings
    {
        public int ClipLengthSeconds { get; set; } = 30;
        public int VideoQuality { get; set; } = 70;
        public int Framerate { get; set; } = 60;
        /// <summary>Windows modifier flags: Alt=1, Ctrl=2, Shift=4, Win=8.</summary>
        public int HotkeyModifiers { get; set; } = 1; // MOD_ALT
        /// <summary>Windows virtual key code (e.g. VK_F9=0x78, VK_PRIOR=0x21 for PgUp).</summary>
        public int HotkeyVirtualKey { get; set; } = 0x78; // VK_F9
    }

    public class SettingsService
    {
        private static string SettingsPath => Path.Combine(
            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
            "ClipForge", "settings.json");

        public AppSettings Settings { get; private set; } = new();

        public void Load()
        {
            try
            {
                if (File.Exists(SettingsPath))
                {
                    var json = File.ReadAllText(SettingsPath);
                    Settings = JsonSerializer.Deserialize<AppSettings>(json) ?? new();
                }
            }
            catch
            {
                Settings = new AppSettings();
            }
        }

        public void Save()
        {
            try
            {
                var dir = Path.GetDirectoryName(SettingsPath)!;
                if (!Directory.Exists(dir))
                    Directory.CreateDirectory(dir);

                var json = JsonSerializer.Serialize(Settings,
                    new JsonSerializerOptions { WriteIndented = true });
                File.WriteAllText(SettingsPath, json);
            }
            catch { }
        }
    }
}