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

namespace PamhagenSysCtrl.Helpers.Pipeline {
    class Tank : INode, ISink, ISource {

        public const double WIDTH = 60;
        public const double HEIGHT = 100;

        public double CenterX { get; set; }
        public double CenterY { get; set; }
        public double TopY => CenterY - HEIGHT / 2;
        public string Label { get; set; }
        public bool IsFull => CallbackIsFull();
        public bool IsFilled => CallbackIsFilled();

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

        protected Func<bool> CallbackIsFilled;
        protected Func<bool> CallbackIsFull;

        public Tank(string label, double x, double y, Func<bool> cbFilled, Func<bool> cbFull) {
            CenterX = x;
            CenterY = y;
            Label = label;
            CallbackIsFilled = cbFilled;
            CallbackIsFull = cbFull;
            Inputs = new HashSet<IEdge>();
            Outputs = new HashSet<IEdge>();
        }

        public void Draw(Canvas canvas) {
            var rect = new Rectangle() {
                Width = WIDTH,
                Height = HEIGHT,
                Stroke = Brushes.Black,
                StrokeThickness = 2,
                Fill = Brushes.White,
            };
            rect.SetValue(Canvas.LeftProperty, CenterX - WIDTH / 2);
            rect.SetValue(Canvas.TopProperty, CenterY - HEIGHT / 2);
            canvas.Children.Add(rect);
        }

        public bool Update(double x, double y) {
            var hover = Math.Abs(x - CenterX) <= WIDTH / 2 && Math.Abs(y - CenterY) <= HEIGHT / 2;
            return hover;
        }
    }
}