using System;
using System.Linq;
using System.Windows;

namespace Flow.Launcher.Helper
{
    public static class SingletonWindowOpener
    {
        public static T Open<T>(params object[] args) where T : Window
        {
            var window = Application.Current.Windows.OfType<Window>().FirstOrDefault(x => x.GetType() == typeof(T))
                         ?? (T)Activator.CreateInstance(typeof(T), args);
            
            // Fix UI bug
            // Add `window.WindowState = WindowState.Normal`
            // If only use `window.Show()`, Settings-window doesn't show when minimized in taskbar 
            // Not sure why this works tho
            // Probably because, when `.Show()` fails, `window.WindowState == Minimized` (not `Normal`) 
            // https://stackoverflow.com/a/59719760/4230390
            window.WindowState = WindowState.Normal; 
            window.Show();
            
            window.Focus();

            return (T)window;
        }
    }
}