using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using InABox.Clients;
using InABox.Core;
using InABox.Mobile;
using Syncfusion.SfImageEditor.XForms;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.UI.Dialogs;

namespace PRS.Mobile
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class RequisitionEditDocumentsView : RequisitionEditView
    {
        public RequisitionEditDocumentsView()
        {
            InitializeComponent();
        }

        public override void Refresh()
        {
            _images.ItemsSource = ViewModel?.Documents;
            _images.ParentID = ViewModel?.Item.ID ?? Guid.Empty;
        }
        
        public async Task AddImage<T, TOptions>(TOptions options) 
            where T : MobileImageSource<T,TOptions>
            where TOptions : MobileImageOptions<T>, new()
        {
            
            MobileDocument file = null;
            try
            {
                file = await MobileDocument.From(options);
            }
            catch (Exception e)
            {
                await MaterialDialog.Instance.AlertAsync(e.Message, "ERROR");
            }
            
            if (file != null)
            {
                using (await MaterialDialog.Instance.LoadingDialogAsync("Saving Image"))
                {

                    Document doc = new Document()
                    {
                        FileName = file.FileName,
                        Data = file.Data,
                        CRC = CoreUtils.CalculateCRC(file.Data),
                        TimeStamp = DateTime.Now
                    };
                    new Client<Document>().Save(doc, "Created on Mobile Device");
                    var link = ViewModel.Documents.AddItem();
                    link.DocumentID = doc.ID;
                    link.FileName = doc.FileName;
                    link.Thumbnail = MobileUtils.ImageTools.CreateThumbnail(doc.Data, 256, 256);
                    link.ParentID = ViewModel.Item.ID;
                    link.Save("Image added from Mobile Device");
                    ViewModel.Documents.Refresh(true);
                    Dispatcher.BeginInvokeOnMainThread(Refresh);

                }
            }
        }
        
    }
}