using System.Drawing;

namespace ProjectAntiAircraftGun
{
    internal class DrawingAntiAircraft
    {
        AntiAircraft aag;
        private readonly int _width = 0;
        private readonly int _height = 0;
        public DrawingAntiAircraft(AntiAircraft aag)
        {
            this.aag = aag;
        }
        public DrawingAntiAircraft()
        {
            aag = new AntiAircraft();
        }
        public void SetPos(Point pos)
        {
            aag.position.X = Math.Clamp(pos.X + aag.position.X, 0, Program.faag.ClientSize.Width-_width);
            aag.position.Y = Math.Clamp(pos.Y + aag.position.Y, 0, Program.faag.ClientSize.Height-_height);
        }
        public void MoveTransport(Vector2 way)
        {
            if(way == null)
            {
                throw new NullReferenceException();
            }
            SetPos(new Point((int)(way.x*aag.Step), (int)(way.y*aag.Step)));
        }
        public void Draw(Graphics g)
        {
            Pen pen = new Pen(Color.Black);
            Brush brush1 = new SolidBrush(aag.FirstColor);
            Brush brush2 = new SolidBrush(aag.SecondColor);

            // Отрисовка гусениц
            g.DrawLine(pen, aag.position.X, aag.position.Y + 30, aag.position.X + 90, aag.position.Y + 30);
            g.DrawLine(pen, aag.position.X + 90, aag.position.Y + 30, aag.position.X + 90, aag.position.Y + 15);
            g.DrawLine(pen, aag.position.X + 90, aag.position.Y + 15, aag.position.X, aag.position.Y + 15);
            g.DrawLine(pen, aag.position.X, aag.position.Y + 15, aag.position.X, aag.position.Y + 30);

            // Отрисовка катков
            g.FillEllipse(brush1, aag.position.X, aag.position.Y + 15, 15, 15);
            g.FillEllipse(brush1, aag.position.X + 75, aag.position.Y + 15, 15, 15);
            for (int i = 1; i <= aag.NumOfRollers - 2; i++)
                g.FillEllipse(brush2, aag.position.X +(75/(aag.NumOfRollers-1))*i, aag.position.Y + 15, 15, 15);

            // Отрисовка кузова
            g.FillRectangle(brush1, aag.position.X + 15, aag.position.Y, 60, 15);

            brush1.Dispose();
            brush2.Dispose();
            pen.Dispose();
        }
    }
}