namespace AirBomber
{
    public class BomberRenderer
    {
        /// <summary>
        /// Класс, отвечающий за прорисовку и перемещение объекта-сущности
        /// </summary>
        public BomberEntity? EntityBomber { get; private set; }

        private int _pictureWidth;
        private int _pictureHeight;

        private int _startPosX;
        private int _startPosY;

        private readonly int _bomberWidth = 200;
        private readonly int _bomberHeight = 200;

        public bool Init(int Speed, double Weight, Color BodyColor, Color AdditionalColor, bool FuelTanks, bool Bombs, int Width, int Height)
        {
            if (Width < _bomberWidth || Height < _bomberHeight)
                return false;

            _pictureWidth = Width;
            _pictureHeight = Height;

            EntityBomber = new BomberEntity();
            EntityBomber.Init(Speed, Weight, BodyColor, AdditionalColor, FuelTanks, Bombs);

            return true;
        }

        public void SetPosition(int x, int y)
        {
            if (EntityBomber is null)
                return;

            if (x < 0)
                x = 0;
            else if (x + _bomberWidth > _pictureWidth)
                x = _pictureWidth - _bomberWidth;
            
            _startPosX = x;

            if (y < 0)
                y = 0;
            else if (y + _bomberHeight > _pictureHeight)
                y = _pictureHeight - _bomberHeight;

            _startPosY = y;
        }

        public void MoveEntity(DirectionType Direction)
        {
            if (EntityBomber == null)
                return;

            switch (Direction)
            {
                case DirectionType.Up:
                    if (_startPosY - EntityBomber.Step > 0)
                        _startPosY -= (int)EntityBomber.Step;

                    break;

                case DirectionType.Down:
                    if (_startPosY + _bomberHeight + EntityBomber.Step <= _pictureHeight)
                        _startPosY += (int)EntityBomber.Step;

                    break;

                case DirectionType.Left:
                    if (_startPosX - EntityBomber.Step > 0)
                        _startPosX -= (int)EntityBomber.Step;

                    break;

                case DirectionType.Right:
                    if (_startPosX + _bomberWidth + EntityBomber.Step <= _pictureWidth)
                        _startPosX += (int)EntityBomber.Step;

                    break;
            }
        }
    
        public void DrawEntity(Graphics g)
        {
            if (EntityBomber == null)
                return;

            Pen pen = new Pen(EntityBomber.BodyColor);
            Brush Brush = new SolidBrush(EntityBomber.BodyColor);
            Brush AdditionalBrush = new SolidBrush(EntityBomber.AdditionalColor);

            /** Отрисовка основной части */
            Point[] LeftWing = {
                new Point(_startPosX + 90, _startPosY),
                new Point(_startPosX + 100, _startPosY), 
                new Point(_startPosX + 108, _startPosY + 85), 
                new Point(_startPosX + 90, _startPosY + 85), 
            };
            g.DrawPolygon(pen, LeftWing);

            Point[] RightWing = {
                new Point(_startPosX + 90, _startPosY + 200),
                new Point(_startPosX + 100, _startPosY + 200),
                new Point(_startPosX + 108, _startPosY + 115),
                new Point(_startPosX + 90, _startPosY + 115),
            };
            g.DrawPolygon(pen, RightWing);

            Point[] Body = {
                new Point(_startPosX + 35, _startPosY + 85),
                new Point(_startPosX + 200, _startPosY + 85),
                new Point(_startPosX + 200, _startPosY + 115),
                new Point(_startPosX + 35, _startPosY + 115),
            };
            g.DrawPolygon(pen, Body);

            Point[] Nose = {
                new Point(_startPosX, _startPosY + 100),
                new Point(_startPosX + 35, _startPosY + 85),
                new Point(_startPosX + 35, _startPosY + 115),
            };
            g.FillPolygon(Brush, Nose);

            Point[] BackLeftWing = {
                new Point(_startPosX + 170, _startPosY + 70),
                new Point(_startPosX + 200, _startPosY + 40),
                new Point(_startPosX + 200, _startPosY + 85),
                new Point(_startPosX + 170, _startPosY + 85),
            };
            g.DrawPolygon(pen, BackLeftWing);

            Point[] BackRightWing = {
                new Point(_startPosX + 170, _startPosY + 130),
                new Point(_startPosX + 200, _startPosY + 160),
                new Point(_startPosX + 200, _startPosY + 115),
                new Point(_startPosX + 170, _startPosY + 115),
            };
            g.DrawPolygon(pen, BackRightWing);


            /** Отрисовка дополнительных элементов */
            if (EntityBomber.FuelTanks)
            {
                Point[] LeftGasTank = {
                new Point(_startPosX + 50, _startPosY + 85),
                new Point(_startPosX + 75, _startPosY + 85),
                new Point(_startPosX + 75, _startPosY + 70),
                new Point(_startPosX + 50, _startPosY + 70),
            };
                g.FillPolygon(AdditionalBrush, LeftGasTank);

                Point[] RightGasTank = {
                new Point(_startPosX + 50, _startPosY + 115),
                new Point(_startPosX + 75, _startPosY + 115),
                new Point(_startPosX + 75, _startPosY + 130),
                new Point(_startPosX + 50, _startPosY + 130),
            };
                g.FillPolygon(AdditionalBrush, RightGasTank);
            }

            if (EntityBomber.Bombs)
            {
                Point LeftBombStartXY = new Point(_startPosX + 110, _startPosY + 115);
                Size LeftBombSize = new Size(50, 25);
                g.FillEllipse(AdditionalBrush, new Rectangle(LeftBombStartXY, LeftBombSize));

                Point RightBombStartXY = new Point(_startPosX + 110, _startPosY + 60);
                Size RightBombSize = new Size(50, 25);
                g.FillEllipse(AdditionalBrush, new Rectangle(RightBombStartXY, RightBombSize));
            }
        }
    }
}