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.BL.Entities;
using Tango.Touch.Components;
using Tango.Touch.Controls;

namespace Tango.PPC.Common.Controls
{
    /// <summary>
    /// Represents the twin color catalog control.
    /// </summary>
    /// <seealso cref="System.Windows.Controls.UserControl" />
    /// <seealso cref="System.Windows.Markup.IComponentConnector" />
    public partial class TwineCatalogControl : UserControl
    {
        private ColorCatalog _catalog;
        private bool _preventChange;
        private double _lastScrollPosition = 0;
        private bool _findInProcess = false;

        /// <summary>
        /// Gets or sets the selected catalog item.
        /// </summary>
        public ColorCatalogsItem SelectedItem
        {
            get { return (ColorCatalogsItem)GetValue(SelectedItemProperty); }
            set { SetValue(SelectedItemProperty, value); }
        }
        public static readonly DependencyProperty SelectedItemProperty =
            DependencyProperty.Register("SelectedItem", typeof(ColorCatalogsItem), typeof(TwineCatalogControl), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(OnSelectedItemPropertyChanged)));

         
        private static void OnSelectedItemPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            TwineCatalogControl twineCatalogControl = (TwineCatalogControl)d;
            if(e.OldValue != e.NewValue)
            {
                twineCatalogControl.SelectedItemPropertyChanged();
            }
        }

        /// <summary>
        /// Gets or sets the collection filter.
        /// </summary>
        public ICollectionFilter CollectionFilter
        {
            get { return (ICollectionFilter)GetValue(CollectionFilterProperty); }
            set { SetValue(CollectionFilterProperty, value); }
        }
        public static readonly DependencyProperty CollectionFilterProperty =
            DependencyProperty.Register("CollectionFilter", typeof(ICollectionFilter), typeof(TwineCatalogControl), new PropertyMetadata(null, (d, e) => (d as TwineCatalogControl).OnCollectionFilterChanged()));


        public void SelectedItemPropertyChanged()
        {
          //  if(renderer.SelectedItem != this.SelectedItem)
            //    renderer.SelectedItem = this.SelectedItem;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="TwineCatalogControl"/> class.
        /// </summary>
        public TwineCatalogControl()
        {
            InitializeComponent();

            //list.ApplyTemplate();
            //list.Loaded += TwineCatalogControl_Loaded;
            DataContextChanged += (x, y) => 
            {
                _catalog = DataContext as ColorCatalog;

                if (scrollViewer != null && _catalog != null)
                {
                    scrollViewer.ScrollToTop();
                    _preventChange = true;
                    slider.Value = _catalog.ColorCatalogsGroupsOrdered.Count;
                    _preventChange = false;
                }
            };

            scrollViewer.Scrolling += ScrollViewer_Scrolling;
        }

        /// <summary>
        /// Handles the Scrolling event of the ScrollViewer control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="Touch.Controls.DoubleValueChangedEventArgs"/> instance containing the event data.</param>
        private void ScrollViewer_Scrolling(object sender, Touch.Controls.DoubleValueChangedEventArgs e)
        {
            if (!_preventChange)
            {
                if (e.Value > _lastScrollPosition + 60 || e.Value < _lastScrollPosition - 60)
                {
                    var group = renderer.GetVisibleGroup();

                    if (group != null)
                    {
                        _preventChange = true;
                        slider.Value = slider.Maximum - _catalog.ColorCatalogsGroupsOrdered.IndexOf(group);
                        _preventChange = false;
                    }

                    _lastScrollPosition = e.Value;
                }
            }
        }

        /// <summary>
        /// Handles the ValueChanged event of the TouchSlider control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="RoutedPropertyChangedEventArgs{System.Double}"/> instance containing the event data.</param>
        private void TouchSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            if (_catalog == null || _catalog.ColorCatalogsGroupsOrdered.Count == 0) return;

            if (!_preventChange)
            {
                if (_catalog != null && scrollViewer != null)
                {
                    _preventChange = true;
                    var group = _catalog.ColorCatalogsGroupsOrdered.ElementAt(_catalog.ColorCatalogsGroupsOrdered.Count - 1 - (int)e.NewValue);
                    scrollViewer.ScrollToPosition(renderer.GetGroupPosition(group));
                    _preventChange = false;
                }
            }

            if (_catalog != null && _catalog.ColorCatalogsGroupsOrdered.Count > _catalog.ColorCatalogsGroupsOrdered.Count - 1 - (int)e.NewValue && _catalog.ColorCatalogsGroupsOrdered.Count - 1 - (int)e.NewValue > -1)
            {
                slider.Foreground = new SolidColorBrush(_catalog.ColorCatalogsGroupsOrdered.ElementAt(_catalog.ColorCatalogsGroupsOrdered.Count - 1 - (int)e.NewValue).Color);
            }
        }

        private void OnCollectionFilterChanged()
        {
            if (_findInProcess)
                return;
            if (CollectionFilter != null)
            {
                CollectionFilter.FilterChanged -= CollectionFilter_FilterChanged;
                CollectionFilter.FilterChanged += CollectionFilter_FilterChanged;
            }
        }

        private void CollectionFilter_FilterChanged(object sender, EventArgs e)
        {
            _findInProcess = true;
            if (CollectionFilter != null )
            {
                renderer.ScrollToFirstFindItem(CollectionFilter);
            }
            _findInProcess = false;
        }
    }
}