using System;
using System.ComponentModel;
using System.Reactive;
using System.Reactive.Disposables;
using System.Threading.Tasks;
using Avalonia;
using Avalonia.Markup.Xaml;
using Avalonia.ReactiveUI;
using DesertPaintCodex.Util;
using DesertPaintCodex.ViewModels;
using ReactiveUI;

namespace DesertPaintCodex.Views
{
    public class MainWindow : ReactiveWindow<MainWindowViewModel>
    {
        private bool _closeValidated;

        public MainWindow()
        {
            InitializeComponent();
#if DEBUG
            this.AttachDevTools();
#endif
            
            this.WhenActivated(disposables=>
            {
                ViewModel?.Exit.Subscribe(_ => Close()).DisposeWith(disposables);
                ViewModel?.ShowMessageBoxDialog.RegisterHandler(DialogUtil.ShowDialog<MessageBoxView,MessageBoxViewModel,int>).DisposeWith(disposables);
                ViewModel?.ShowAboutDialog.RegisterHandler(DialogUtil.ShowDialog<AboutView,AboutViewModel,Unit>).DisposeWith(disposables);
                ViewModel?.ShowScreenSettingsDialog.RegisterHandler(DialogUtil.ShowDialog<ScreenSettingsView,ScreenSettingsViewModel,Unit>).DisposeWith(disposables);
            });
        }

        private void InitializeComponent()
        {
            AvaloniaXamlLoader.Load(this);
        }

        public async void OnMainWindowClosing(object? sender, CancelEventArgs e)
        {
            if (_closeValidated) return;
            if (ViewModel == null) return;
            e.Cancel = true;
            if (!await ViewModel.ValidateSafeExit()) return;
            _closeValidated = true;
            Close();
        }
    }
}