using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace PamhagenSysCtrl.Helpers.Pipeline {
    public class Inlet : IEdge {

        public INode Start { get; set; }
        public INode End => Sink;
        public ISink Sink { get; set; }
        public bool IsTwoWay => false;
        public bool Orientation { get; set; }
        public Brush? Highlight { get; set; }

        private Line? _outer1;
        private Line? _outer2;
        private Line? _inner1;
        private Line? _inner2;

        public Inlet(INode start, ISink end, bool orientation = false) {
            Start = start;
            Sink = end;
            Orientation = orientation;
        }

        public void Draw(Canvas canvas) {
            var x1 = Start.CenterX;
            var y1 = Start.CenterY;
            var x2 = Start.CenterX;
            var y2 = Sink.TopY - 10;
            var x3 = Start.CenterX + (Orientation ? -20 : 20);
            var y3 = Sink.TopY + 20;
            _outer1 = new Line() {
                X1 = x1,
                Y1 = y1,
                X2 = x2,
                Y2 = y2,
                StrokeThickness = 10,
                Stroke = Brushes.Black,
                StrokeStartLineCap = PenLineCap.Round,
                StrokeEndLineCap = PenLineCap.Round,
            };
            _inner1 = new Line() {
                X1 = x1,
                Y1 = y1,
                X2 = x2,
                Y2 = y2,
                StrokeThickness = 6,
                Stroke = Brushes.DarkGray,
                StrokeStartLineCap = PenLineCap.Round,
                StrokeEndLineCap = PenLineCap.Round,
            };
            _outer2 = new Line() {
                X1 = x2,
                Y1 = y2,
                X2 = x3,
                Y2 = y3,
                StrokeThickness = 10,
                Stroke = Brushes.Black,
                StrokeStartLineCap = PenLineCap.Round,
                StrokeEndLineCap = PenLineCap.Flat,
            };
            _inner2 = new Line() {
                X1 = x2,
                Y1 = y2,
                X2 = x3,
                Y2 = y3,
                StrokeThickness = 6,
                Stroke = Brushes.DarkGray,
                StrokeStartLineCap = PenLineCap.Round,
                StrokeEndLineCap = PenLineCap.Flat,
            };
            canvas.Children.Add(_outer1);
            canvas.Children.Add(_outer2);
            canvas.Children.Add(_inner1);
            canvas.Children.Add(_inner2);
        }

        public void Update() {
            _inner1?.Stroke = Highlight ?? Brushes.DarkGray;
            _inner2?.Stroke = Highlight ?? Brushes.DarkGray;
        }
    }
}