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

namespace DrawFigureLibrary
{
    public abstract class Figure
    {
        public string? Name { get; }

        public int x;
        public int y;
        public int w;
        public int h;

        public Figure(string name, int x, int y, int w, int h)
        {
            this.Name = name;
            this.x = x;
            this.y = y;
            this.w = w;
            this.h = h;
        }

        public abstract void Draw(DrawingContext ctx);

        public abstract void MoveBy(int dX, int dY);

        public override string ToString() => Name ?? "";

        public static bool Check(Figure fig, int dX, int dY, Image img)
        {
            long nx = (long)fig.x + dX;
            long ny = (long)fig.y + dY;
            long nr = nx + fig.w;
            long nb = ny + fig.h;

            return nx >= 0 &&
                   ny >= 0 &&
                   nr <= (long)img.ActualWidth &&
                   nb <= (long)img.ActualHeight;
        }

        public virtual bool HitTest(Point p) => p.X >= x && p.X <= x + w && p.Y >= y && p.Y <= y + h;
        
        public virtual bool MoveByChecked(int dX, int dY)
        {
            if (Init.DrawingImage == null) return false;
            if (!Check(this, dX, dY, Init.DrawingImage)) return false;

            MoveBy(dX, dY);
            return true;
        }
    }
}