using System.IO;
using System.Linq;
using InABox.Clients;
using InABox.Core;
using Xamarin.Forms;

namespace PRS.Mobile
{
    
    public class DigitalFormImage : Image, IDigitalFormControl<DFLayoutImage>
    {
        private DFLayoutImage _definition;
        public DFLayoutImage Definition
        {
            get => _definition;
            set
            {
                _definition = value;
                Initialize(value ?? new DFLayoutImage());
            }
        }

        public DigitalFormImage()
        {
            MinimumHeightRequest = 150;
            MinimumWidthRequest = 150;
            Aspect = Aspect.AspectFit;

            HorizontalOptions = LayoutOptions.FillAndExpand;
            VerticalOptions = LayoutOptions.FillAndExpand;
            GestureRecognizers.Add(
                new TapGestureRecognizer
                {
                    Command = new Command(OnTap),
                    NumberOfTapsRequired = 1
                }
            );
        }
        
        private void OnTap(object obj)
        {
            if (Source != null)
            {
                ImageViewerPage viewer = new ImageViewerPage(Source, null);
                Navigation.PushAsync(viewer);
            }
        }
        
        private void Initialize(DFLayoutImage image)
        {
            var row = new Client<Document>().Query(
                new Filter<Document>(x => x.ID).IsEqualTo(image.Image.ID)
            ).Rows.FirstOrDefault();
            
            if (row != null)
            {
                byte[] data = row.Get<Document, byte[]>(x => x.Data);
                Source = ImageSource.FromStream(() => new MemoryStream(data));
            }
        }
        
    }
}