using Avalar.ViewModels.Image;
using Avalar.Views;
using Avalonia.Media.Imaging;
using ReactiveUI;
using System.Linq;

namespace Avalar.Viewmodels.Image
{
    public class ImageViewModel : ReactiveObject
    {
        public ImageViewModel(IAvalarViewService viewService)
        {
            ViewService = viewService;
            ChildViewModel = new ImageNotLoadedViewModel(ReactiveCommand.Create(OpenFile));
        }

        private IAvalarViewService ViewService { get; }

        private object m_ChildViewModel;

        public object ChildViewModel
        {
            get => m_ChildViewModel;
            set {
                this.RaiseAndSetIfChanged(ref m_ChildViewModel, value);
            }
        }

        public async void OpenFile()
        {
            var result = await ViewService.ShowOpenImageFileDialog();
            if (result.Length != 1) return;

            ChildViewModel = new ImageLoadedViewModel(new Bitmap(result.First()));
        }
    }
}