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.Markup;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace VisionCommonUI {
    /// <summary>
    /// Interaction logic for UCContentSlider.xaml
    /// </summary>
    public class SliderChangedEventArgs : EventArgs {
        public double NewValue { get; set; }

        public SliderChangedEventArgs(double newValue) {
            NewValue = newValue;
        }
    }

    [ContentProperty("InnerContent")]
    public partial class UCContentSlider : UserControl {
        public event EventHandler SliderChangedEvent;
        public static Type _classType = typeof(UCContentSlider);

        public static readonly DependencyProperty InnerContentProperty
               = DependencyProperty.Register(
                   nameof(InnerContent),
                   typeof(FrameworkElement),
                   _classType);

        public FrameworkElement InnerContent {
            get { return (FrameworkElement)GetValue(InnerContentProperty); }
            set { SetValue(InnerContentProperty, value); }
        }

        public static readonly DependencyProperty KeyValueProperty
               = DependencyProperty.Register(
                   nameof(KeyValue),
                   typeof(double),
                   _classType,
                   new FrameworkPropertyMetadata(
                       0.0,
                       FrameworkPropertyMetadataOptions.BindsTwoWayByDefault,
                       (d, e) => (d as UCContentSlider).OnKeyValueChanged(e)
                   ));

        private void OnKeyValueChanged(DependencyPropertyChangedEventArgs e) {
            SliderChangedEvent?.Invoke(this, new SliderChangedEventArgs(Convert.ToDouble(e.NewValue)));
        }

        public double KeyValue {
            get { return (double)GetValue(KeyValueProperty); }
            set { SetValue(KeyValueProperty, value); }
        }

        public static readonly DependencyProperty MinValueProperty
               = DependencyProperty.Register(
                   nameof(MinValue),
                   typeof(double),
                   _classType);

        public double MinValue {
            get { return (double)GetValue(MinValueProperty); }
            set { SetValue(MinValueProperty, value); }
        }

        public static readonly DependencyProperty MaxValueProperty
               = DependencyProperty.Register(
                   nameof(MaxValue),
                   typeof(double),
                   _classType);

        public double MaxValue {
            get { return (double)GetValue(MaxValueProperty); }
            set { SetValue(MaxValueProperty, value); }
        }

        public static readonly DependencyProperty TickFrequencyProperty
               = DependencyProperty.Register(
                   nameof(TickFrequency),
                   typeof(double),
                   _classType,
                   new FrameworkPropertyMetadata(
                       10.0,
                       FrameworkPropertyMetadataOptions.BindsTwoWayByDefault
                   ));

        public double TickFrequency {
            get { return (double)GetValue(TickFrequencyProperty); }
            set { SetValue(TickFrequencyProperty, value); }
        }

        public static readonly DependencyProperty StepProperty
               = DependencyProperty.Register(
                   nameof(Step),
                   typeof(double),
                   _classType,
                   new FrameworkPropertyMetadata(
                       1.0,
                       FrameworkPropertyMetadataOptions.BindsTwoWayByDefault
                   ));

        public double Step {
            get { return (double)GetValue(StepProperty); }
            set { SetValue(StepProperty, value); }
        }

        public UCContentSlider() {
            InitializeComponent();
            DataContext = this;
        }

        private void OnMinusBtnClicked(object sender, RoutedEventArgs e) {
            if ((sliderControl.Value - Step) > sliderControl.Minimum) {
                sliderControl.Value -= Step;
            }
            else {
                sliderControl.Value = sliderControl.Minimum;
            }
        }

        private void OnPlusBtnClicked(object sender, RoutedEventArgs e) {
            if ((sliderControl.Value + Step) < sliderControl.Maximum) {
                sliderControl.Value += Step;
            }
            else {
                sliderControl.Value = sliderControl.Maximum;
            }
        }
    }
}