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

namespace Tango.Touch.Controls
{
    public class TouchArcProgress : ProgressBar
    {
        private SharedUI.Shapes.Arc _arc;
        private SharedUI.Shapes.Arc _arc_base;

        public double RingThickness
        {
            get { return (double)GetValue(RingThicknessProperty); }
            set { SetValue(RingThicknessProperty, value); }
        }
        public static readonly DependencyProperty RingThicknessProperty =
            DependencyProperty.Register("RingThickness", typeof(double), typeof(TouchArcProgress), new PropertyMetadata(3.0));



        public int MinArcAngle
        {
            get { return (int)GetValue(MinArcAngleProperty); }
            set { SetValue(MinArcAngleProperty, value); }
        }

        // Using a DependencyProperty as the backing store for MinArcAngle.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty MinArcAngleProperty =
            DependencyProperty.Register("MinArcAngle", typeof(int), typeof(TouchArcProgress), new PropertyMetadata(40));



        public int MaxArcAngle
        {
            get { return (int)GetValue(MaxArcAngleProperty); }
            set { SetValue(MaxArcAngleProperty, value); }
        }

        // Using a DependencyProperty as the backing store for MaxArcAngle.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty MaxArcAngleProperty =
            DependencyProperty.Register("MaxArcAngle", typeof(int), typeof(TouchArcProgress), new PropertyMetadata(320));



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

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            _arc = GetTemplateChild("PART_ArcValue") as SharedUI.Shapes.Arc;
            _arc_base = GetTemplateChild("PART_ArcBase") as SharedUI.Shapes.Arc;
            SetArcBase();
            SetArc();
        }

        protected override void OnValueChanged(double oldValue, double newValue)
        {
            base.OnValueChanged(oldValue, newValue);
            SetArc();
        }

        protected override void OnMinimumChanged(double oldMinimum, double newMinimum)
        {
            base.OnMinimumChanged(oldMinimum, newMinimum);
            SetArcBase();
            SetArc();
        }

        protected override void OnMaximumChanged(double oldMaximum, double newMaximum)
        {
            base.OnMaximumChanged(oldMaximum, newMaximum);
            SetArcBase();
            SetArc();
        }

        private void SetArcBase()
        {
            if (_arc_base != null)
            {
                _arc_base.StartAngle = ((MaxArcAngle - MinArcAngle) * (Minimum / (Maximum - Minimum))) + MinArcAngle;
                _arc_base.EndAngle = ((MaxArcAngle - MinArcAngle) * (Maximum / (Maximum - Minimum))) + MinArcAngle;
            }
        }

        private void SetArc()
        {
            if (_arc != null)
            {
                _arc.StartAngle = ((MaxArcAngle - MinArcAngle) * (Minimum / (Maximum - Minimum))) + MinArcAngle;
                _arc.EndAngle = ((MaxArcAngle - MinArcAngle) * (Value / (Maximum - Minimum))) + MinArcAngle;
            }
        }
    }
}