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

namespace PRS.Mobile
{
    public class DigitalFormDocumentShell : Shell<DigitalFormModel, DigitalFormDocument>, IDocumentShell
    {
        protected override void ConfigureColumns(ShellColumns<DigitalFormModel, DigitalFormDocument> columns)
        {
            columns
                .Map(nameof(EntityID), x => x.EntityLink.ID)
                .Map(nameof(FileName), x => x.DocumentLink.FileName)
                .Map(nameof(_thumbnail), x => x.Thumbnail);
        }

        public Guid EntityID => Get<Guid>();
        
        public String FileName => Get<String>();
        
        private byte[] _thumbnail => Get<byte[]>();
        public ImageSource Thumbnail => ImageSource.FromStream(() => new MemoryStream(_thumbnail));
        
        public DigitalFormShell Form => Parent.Items.FirstOrDefault(x => Guid.Equals(x.ID, ID));
    }
}