using Microsoft.Win32;

namespace MusicBridge.Agent.Desktop;

internal sealed class StartupSettings(string executable, bool lan, int port,
    string registryPath = @"Software\Microsoft\Windows\CurrentVersion\Run")
{
    private const string ValueName = "MusicBridge.Agent";
    public string Command => BuildCommand(executable, lan, port);
    public bool Enabled
    {
        get
        {
            using var key = Registry.CurrentUser.OpenSubKey(registryPath);
            return string.Equals(key?.GetValue(ValueName) as string, Command, StringComparison.OrdinalIgnoreCase);
        }
    }

    public void SetEnabled(bool enabled)
    {
        if (enabled && !File.Exists(executable)) throw new FileNotFoundException("Сначала установи или опубликуй MusicBridge.", executable);
        using var key = Registry.CurrentUser.CreateSubKey(registryPath);
        if (enabled) key.SetValue(ValueName, Command, RegistryValueKind.String);
        else key.DeleteValue(ValueName, throwOnMissingValue: false);
    }

    internal static string BuildCommand(string executable, bool lan, int port)
    {
        if (!Path.IsPathFullyQualified(executable) || executable.Contains('"') || executable.Any(char.IsControl)
            || !Path.GetFileName(executable).Equals("MusicBridge.Agent.exe", StringComparison.OrdinalIgnoreCase)
            || port is < 1 or > 65535) throw new ArgumentException("Неверный путь или порт автозапуска.");
        return $"\"{executable}\" --tray --minimized{(lan ? " --lan" : "")} --port {port}";
    }
}