using System.Threading;
using System.Windows;

namespace BmsMonitor.App;

public partial class App : Application
{
    private Mutex? _singleInstanceMutex;
    private bool _ownsMutex;

    protected override void OnStartup(StartupEventArgs e)
    {
        _singleInstanceMutex = new Mutex(true, "Local\\BmsMonitor.ReadOnly.SingleInstance", out _ownsMutex);
        if (!_ownsMutex)
        {
            MessageBox.Show("BMS Monitor 已经在运行。请关闭已有窗口后再启动。", "程序已运行",
                MessageBoxButton.OK, MessageBoxImage.Information);
            Shutdown();
            return;
        }

        base.OnStartup(e);
    }

    protected override void OnExit(ExitEventArgs e)
    {
        if (_ownsMutex) _singleInstanceMutex?.ReleaseMutex();
        _singleInstanceMutex?.Dispose();
        base.OnExit(e);
    }
}