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

namespace PamhagenSysCtrl.Helpers.Pipeline {
    public class Pump : INode {

        public const double DIAMETER = 24;

        public double CenterX { get; set; }
        public double CenterY { get; set; }
        public string Label { get; set; }

        public ISet<IEdge> Inputs { get; init; }
        public ISet<IEdge> Outputs { get; init; }

        private Shape? _circle;
        private Shape? _triangle;
        private TextBlock? _text;

        public Pump(string label, double x, double y) {
            CenterX = x;
            CenterY = y;
            Label = label;
            Inputs = new HashSet<IEdge>();
            Outputs = new HashSet<IEdge>();
        }

        public void Draw(Canvas canvas) {
            _circle = new Ellipse() {
                Height = DIAMETER,
                Width = DIAMETER,
                Fill = Brushes.WhiteSmoke,
                Stroke = Brushes.Black,
                StrokeThickness = 2,
            };
            var dx = Math.Cos(Math.PI / 6) * (DIAMETER / 2 - 2);
            var dy = Math.Sin(Math.PI / 6) * (DIAMETER / 2 - 2);
            _triangle = new Polygon() {
                Points = [new(CenterX - dx, CenterY - dy), new(CenterX + dx, CenterY - dy), new(CenterX, CenterY + DIAMETER / 2 - 2)],
                Fill = Brushes.Transparent,
                Stroke = Brushes.Black,
                StrokeThickness = 2,
            };
            _text = new() {
                Text = Label,
                FontSize = 14,
                TextAlignment = TextAlignment.Left,
                VerticalAlignment = VerticalAlignment.Center,
            };
            _circle.SetValue(Canvas.LeftProperty, CenterX - DIAMETER / 2);
            _circle.SetValue(Canvas.TopProperty, CenterY - DIAMETER / 2);
            _text.SetValue(Canvas.LeftProperty, CenterX + DIAMETER / 2 + 2);
            _text.SetValue(Canvas.TopProperty, CenterY - 10);
            canvas.Children.Add(_circle);
            canvas.Children.Add(_triangle);
            canvas.Children.Add(_text);
        }

        public bool IsInside(double x, double y) {
            return Math.Sqrt(Math.Pow(CenterX - x, 2) + Math.Pow(CenterY - y, 2)) <= DIAMETER / 2;
        }

        public void Update(bool isHovering, bool isPresed) {
            _circle?.Fill = isHovering ? Brushes.LightGray : Brushes.WhiteSmoke;
        }
    }
}