using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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;
using Tango.Core.ExtensionMethods;

namespace Tango.Touch.Controls
{
    public class TouchNativeListBox : ListBox
    {

        /// <summary>
        /// Gets or sets the ripple factor.
        /// </summary>
        public double RippleFactor
        {
            get { return (double)GetValue(RippleFactorProperty); }
            set { SetValue(RippleFactorProperty, value); }
        }
        public static readonly DependencyProperty RippleFactorProperty =
            DependencyProperty.Register("RippleFactor", typeof(double), typeof(TouchNativeListBox), new PropertyMetadata(30.0));

        /// <summary>
        /// Gets or sets a value indicating whether to prevent selection on mouse down.
        /// </summary>
        public bool PreventTouchDownSelect
        {
            get { return (bool)GetValue(PreventTouchDownSelectProperty); }
            set { SetValue(PreventTouchDownSelectProperty, value); }
        }
        public static readonly DependencyProperty PreventTouchDownSelectProperty =
            DependencyProperty.Register("PreventTouchDownSelect", typeof(bool), typeof(TouchNativeListBox), new PropertyMetadata(true));


        /// <summary>
        /// Gets or sets the scroll viewer.
        /// </summary>
        public LightTouchScrollViewer ScrollViewer
        {
            get { return (LightTouchScrollViewer)GetValue(ScrollViewerProperty); }
            set { SetValue(ScrollViewerProperty, value); }
        }
        public static readonly DependencyProperty ScrollViewerProperty =
            DependencyProperty.Register("ScrollViewer", typeof(LightTouchScrollViewer), typeof(TouchNativeListBox), new PropertyMetadata(null));

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            ScrollViewer = GetTemplateChild("PART_ScrollViewer") as LightTouchScrollViewer;
        }

        protected override void OnMouseUp(MouseButtonEventArgs e)
        {
            if (ScrollViewer.IsAfterScrolling) return;

            if (e.ChangedButton == MouseButton.Left)
            {
                DependencyObject obj = this.ContainerFromElement((Visual)e.OriginalSource);
                if (obj != null)
                {
                    FrameworkElement element = obj as FrameworkElement;
                    if (element != null)
                    {
                        if (String.IsNullOrWhiteSpace(SelectedValuePath))
                        {
                            ListBoxItem item = element as ListBoxItem;
                            if (item != null)
                            {
                                this.SelectedItem = item.DataContext;
                            }
                        }
                        else
                        {
                            object context = element.DataContext;
                            if (context != null)
                            {
                                SelectedValue = context.GetPropertyValueByPath(SelectedValuePath);
                            }
                        }
                    }
                }
            }
        }

        protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
        {
            if (PreventTouchDownSelect)
            {
                e.Handled = true;
            }
        }

        static TouchNativeListBox()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(TouchNativeListBox), new FrameworkPropertyMetadata(typeof(TouchNativeListBox)));
        }
    }
}