using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace AIStudio.Wpf.DiagramDesigner
{
    /// <summary>
    /// Interaction logic for DiagramControl.xaml
    /// </summary>
    public partial class DiagramControl : UserControl
    {
        public DiagramControl()
        {
            InitializeComponent();

            if (ResourceDictionary != null)
            {
                this.Resources.MergedDictionaries.Add(ResourceDictionary);
            }

            this.Focusable = true;
        }

        public static readonly DependencyProperty ResourceDictionaryProperty = DependencyProperty.Register(nameof(ResourceDictionary), typeof(ResourceDictionary), typeof(DiagramControl), new UIPropertyMetadata(null, OnResourceDictionaryChanged));

        private static void OnResourceDictionaryChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            if (d is DiagramControl diagram)
            {
                if (e.NewValue is ResourceDictionary dictionary)
                {
                    diagram.Resources.MergedDictionaries.Add(dictionary);
                }
            }
        }

        public ResourceDictionary ResourceDictionary
        {
            get
            {
                return (ResourceDictionary)GetValue(ResourceDictionaryProperty);
            }
            set
            {
                SetValue(ResourceDictionaryProperty, value);
            }
        }

        public static readonly DependencyProperty ZoomValueProperty = DependencyProperty.Register(nameof(ZoomValue), typeof(double), typeof(DiagramControl), new UIPropertyMetadata(1d));
        public double ZoomValue
        {
            get
            {
                return (double)GetValue(ZoomValueProperty);
            }
            set
            {
                SetValue(ZoomValueProperty, value);
            }
        }


        private void DesignerCanvas_Loaded(object sender, RoutedEventArgs e)
        {
            //DesignerCanvas myDesignerCanvas = sender as DesignerCanvas;
            //zoomBox.DesignerCanvas = myDesignerCanvas;        
        }

        private async void ScaleTransform_Changed(object sender, EventArgs e)
        {
            await System.Threading.Tasks.Task.Delay(100);
            ZoomValue = scale.ScaleX;
        }

        private IDiagramViewModel DiagramViewModel
        {
            get
            {
                return DataContext as IDiagramViewModel;
            }
        }

        protected override void OnPreviewKeyDown(KeyEventArgs e)
        {
            base.OnPreviewKeyDown(e);

            if (DiagramViewModel.DiagramOption.ShortcutOption.SelectAll(e))
            {
                DiagramViewModel.SelectAllCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Copy(e))
            {
                DiagramViewModel.CopyCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Paste(e))
            {
                DiagramViewModel.PasteCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Cut(e))
            {
                DiagramViewModel.CutCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Undo(e))
            {
                DiagramViewModel.UndoCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Redo(e))
            {
                DiagramViewModel.RedoCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Delete(e))
            {
                DiagramViewModel.DeleteCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.LeftMove(e))
            {
                DiagramViewModel.LeftMoveCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.RightMove(e))
            {
                DiagramViewModel.RightMoveCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.UpMove(e))
            {
                DiagramViewModel.UpMoveCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.DownMove(e))
            {
                DiagramViewModel.DownMoveCommand.Execute(null);
                e.Handled = true;
                return;
            }
            else if (DiagramViewModel.DiagramOption.ShortcutOption.Group(e))
            {
                DiagramViewModel.GroupCommand.Execute(null);
                e.Handled = true;
                return;
            }
        }
    }
}