using Avalonia;
using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Input.Platform;
using Avalonia.Interactivity;
using Avalonia.Threading;
using AgentWikiUi.Core;

namespace AgentWikiUi.Gui;

partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        var vm = new MainViewModel();
        DataContext = vm;

        // proporzioni 16:10 orizzontali: 75% della larghezza utile (max 1440), altezza max 90%
        var screen = Screens.Primary;
        if (screen is not null)
        {
            var area = screen.WorkingArea;
            double w = Math.Min(1440, area.Width / screen.Scaling * 3 / 4);
            var h = Math.Min(w * 10 / 16, area.Height / screen.Scaling * 9 / 10);
            Width = h * 16 / 10; Height = h;
        }
        else { Width = 1280; Height = 800; }
        WindowStartupLocation = WindowStartupLocation.CenterScreen;

        vm.CopyText = async text => { if (Clipboard is { } cb) await cb.SetTextAsync(text); };
        vm.ConfirmDelete = () => ConfirmDialog.Ask(this, "Eliminare questa chat?");
        vm.FocusInput += () => Dispatcher.UIThread.Post(() => InputBox.Focus());
        vm.Messages.CollectionChanged += (_, _) => Dispatcher.UIThread.Post(() => Scroll.ScrollToEnd(), DispatcherPriority.Background);

        // Invio invia, Maiusc+Invio va a capo (tunnel: prima che il TextBox inserisca l'a capo)
        InputBox.AddHandler(KeyDownEvent, (_, e) =>
        {
            if (e.Key == Key.Enter && !e.KeyModifiers.HasFlag(KeyModifiers.Shift))
            {
                e.Handled = true;
                if (vm.SendCommand.CanExecute(null)) vm.SendCommand.Execute(null);
            }
        }, RoutingStrategies.Tunnel);

        Opened += (_, _) => InputBox.Focus();
    }
}