using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;

namespace RealTimeGraphEx.Components
{
    public abstract class ComponentBase : UserControl
    {
        public ComponentLocationEnum Location
        {
            get { return (ComponentLocationEnum)GetValue(LocationProperty); }
            set { SetValue(LocationProperty, value); }
        }
        public static readonly DependencyProperty LocationProperty =
            DependencyProperty.Register("Location", typeof(ComponentLocationEnum), typeof(ComponentBase), new PropertyMetadata(ComponentLocationEnum.None));

        public RealTimeGraphExBase Graph
        {
            get { return (RealTimeGraphExBase)GetValue(GraphProperty); }
            set { SetValue(GraphProperty, value); }
        }
        public static readonly DependencyProperty GraphProperty =
            DependencyProperty.Register("Graph", typeof(RealTimeGraphExBase), typeof(ComponentBase), new PropertyMetadata(null));

        public ComponentBase()
        {
            this.Loaded += ComponentBase_Loaded;
        }

        private void ComponentBase_Loaded(object sender, RoutedEventArgs e)
        {
            if (Graph != null)
            {
                Graph.ZoomComplete += OnGraphZoomComplete;
                Graph.PanningComplete += OnGraphPanningComplete;
                Graph.MinMaxChanged += Graph_MinMaxChanged;
                Render(Graph);
            }
        }

        private void Graph_MinMaxChanged(object sender, EventArgs e)
        {
            OnGraphMinMaxChanged();
        }

        public abstract void Render(RealTimeGraphExBase graph, bool animate = false);

        public void RemoveFromParent()
        {
            var parent = this.Parent;
            var child = this;

            var panel = parent as Panel;
            if (panel != null)
            {
                panel.Children.Remove(child);
                return;
            }

            var decorator = parent as Decorator;
            if (decorator != null)
            {
                if (decorator.Child == child)
                {
                    decorator.Child = null;
                }
                return;
            }

            var contentPresenter = parent as ContentPresenter;
            if (contentPresenter != null)
            {
                if (contentPresenter.Content == child)
                {
                    contentPresenter.Content = null;
                }
                return;
            }

            var contentControl = parent as ContentControl;
            if (contentControl != null)
            {
                if (contentControl.Content == child)
                {
                    contentControl.Content = null;
                }
                return;
            }

            // maybe more
        }

        protected virtual void OnGraphZoomComplete(Point transformOrigin, double scaleX, double scaleY)
        {

        }

        protected virtual void OnGraphPanningComplete(Point translate)
        {

        }

        protected virtual void OnGraphMinMaxChanged()
        {

        }
    }
}