using System;
using System.IO;
using System.Threading.Tasks;
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.Modules.DocScanner
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class DocScannerEditor
    {
        public DocScannerEditor(DataEntryDocumentShell document)
        {
            InitializeComponent();
            ViewModel.Document = document;
            _imageEditor.Source = ImageSource.FromStream(() => new MemoryStream(ViewModel.Image?.Data ?? new byte[] { }));
            
            _imageEditor.ToolbarSettings.ToolbarItems.Add( 
                new HeaderToolbarItem 
                { 
                    Name = "CustomRotate", 
                    Text = "Rotate", 
                });
            
            _imageEditor.ToolbarSettings.ToolbarItemSelected += ToolbarSettings_CustomButtonClicked; 
            
        }

        private void ToolbarSettings_CustomButtonClicked(object sender, ToolbarItemSelectedEventArgs e)
        {
            switch (e.ToolbarItem.Name)
            {
                case "CustomRotate":
                    _imageEditor.Rotate();
                    break;
            }
        }

        protected override void OnAppearing() 
        { 
            base.OnAppearing(); 
            _imageEditor.SetToolbarItemVisibility("save", false); 
        } 
        private async void ImageEditor_ImageSaving(object sender, ImageSavingEventArgs args)
        {
            args.Cancel = true;
            
            using (await MaterialDialog.Instance.LoadingDialogAsync("Saving Data"))
            {
                if (ViewModel.Image != null)
                {
                    var stream = args.Stream;
                    MemoryStream memoryStream = new MemoryStream();
                    await stream.CopyToAsync(memoryStream);
                    ViewModel.Image.Data = memoryStream.ToArray();
                    ViewModel.Image.CRC = CoreUtils.CalculateCRC(ViewModel.Image.Data);
                    ViewModel.Image.TimeStamp = DateTime.Now;
                    ViewModel.Image.Save("Updated from Mobile Device");

                    ViewModel.Document.Thumbnail =
                        MobileUtils.ImageTools.CreateThumbnail(ViewModel.Image.Data, 256, 256);
                }
                ViewModel.Document.Save("Updated from Mobile Device");
            }
            Navigation.PopAsync();
        }

        private void SaveBtn_Clicked(object sender, MobileMenuButtonClickedEventArgs args)
        {
            _imageEditor.Save();
        }


    }
}