PolyTraderSharp/Ui/ShellUiHost.cs

using System.Collections.Generic;
using System.Windows.Forms;
using PolyTrader.Core.Modularity;

namespace PolyTraderSharp.Ui
{
    /// <summary>
    /// Sammelt die von Core-App und Modulen registrierten Views und öffnet sie als
    /// eigenständige Host-Fenster (Einzelinstanz je View).
    /// </summary>
    public class ShellUiHost : IModuleUiHost
    {
        private readonly List<ModuleView> _views = new();
        private readonly Dictionary<string, ViewHostForm> _open = new();

        public IReadOnlyList<ModuleView> Views => _views;

        public void RegisterView(ModuleView view) => _views.Add(view);

        public void OpenView(ModuleView view)
        {
            if (_open.TryGetValue(view.Id, out var existing) && !existing.IsDisposed)
            {
                if (existing.WindowState == FormWindowState.Minimized)
                    existing.WindowState = FormWindowState.Normal;
                existing.BringToFront();
                existing.Activate();
                return;
            }

            var host = new ViewHostForm(view);
            host.FormClosed += (_, _) => _open.Remove(view.Id);
            _open[view.Id] = host;
            host.Show();
        }
    }
}