import javax.swing.*;
import java.awt.*;
import java.util.Random;

public class DrawningBoat extends JPanel {

    private EntityBoat Boat;
    public EntityBoat GetBoat(){
        return Boat;
    }

    private int _startPosX;
    private int _startPosY;
    public DrawningOars OarsDraw;
    public Integer _pictureWidth = null;
    public Integer _pictureHeight = null;
    private final int _BoatWidth = 80;
    private final int _BoatHeight = 50;

    public void SetOars() {
        Random r = new Random();
        int numIllum = r.nextInt(1,4);
        OarsDraw.SetOarsCount(numIllum);
    }

    public void Init(int speed, float weight, Color bodyColor)
    {
        Boat = new EntityBoat();
        Boat.Init(speed, weight, bodyColor);
        OarsDraw = new DrawningOars();
        SetOars();
    }

    public void SetPosition(int x, int y, int width, int height)
    {
        if (x >= 0 && x + _BoatWidth <= width && y >= 0 && y + _BoatHeight <= height) {
            _startPosX = x;
            _startPosY = y;
            _pictureWidth = width;
            _pictureHeight = height;
        }
    }

    public void MoveTransport(Direction direction)
    {
        if (_pictureWidth == null || _pictureHeight == null)
        {
            return;
        }
        switch (direction)
        {
            case Right:
                if (_startPosX + _BoatWidth + Boat.Step < _pictureWidth)
                {
                    _startPosX += Boat.Step;
                }
                break;
            case Left:
                if (_startPosX - Boat.Step > 0)
                {
                    _startPosX -= Boat.Step;
                }
                break;
            case Up:
                if (_startPosY - Boat.Step > 0)
                {
                    _startPosY -= Boat.Step;
                }
                break;
            case Down:
                if (_startPosY + _BoatHeight + Boat.Step < _pictureHeight)
                {
                    _startPosY += Boat.Step;
                }
                break;
        }
    }

    public void DrawTransport() {
        if (_startPosX < 0 || _startPosY < 0 || _pictureWidth == null || _pictureHeight == null) {
            return;
        }
        repaint();
    }
    @Override
    public void paintComponent(Graphics g) {
        if (GetBoat() == null) {
            return;
        }
        if (_startPosX < 0 || _startPosY < 0 || _pictureWidth == null || _pictureHeight == null) {
            return;
        }
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g;

        g2d.setColor(Color.BLACK);
        //границы
        g2d.drawRect(_startPosX, _startPosY, _BoatWidth * 3 / 4, _BoatHeight);

        int[] xpoints = {(int)(_startPosX + _BoatWidth * 3 / 4), (int)(_startPosX + _BoatWidth), (int)(_startPosX + _BoatWidth * 3 / 4) };
        int[] ypoints = {(int)_startPosY, (int)(_startPosY + _BoatHeight / 2), (int)(_startPosY + _BoatHeight)};

        g2d.drawPolygon(xpoints, ypoints, 3);

        g2d.setPaint(Boat.GetBodyColor());

        g2d.fillRect(_startPosX, _startPosY, _BoatWidth * 3 / 4, _BoatHeight);
        g2d.fillPolygon(xpoints, ypoints, 3);

        // середина
        g2d.setColor(Color.BLACK);
        g2d.drawOval(_startPosX +  5, _startPosY +  5, _BoatWidth - 15, _BoatHeight - 11);

        g2d.setPaint(Color.CYAN);
        g2d.fillOval(_startPosX + 5, _startPosY + 5, _BoatWidth - 15, _BoatHeight - 11);

        OarsDraw.DrawOars(g, _startPosX, _startPosY);
    }

    public void ChangeBorders(int width, int height)
    {
        _pictureWidth = width;
        _pictureHeight = height;
        if (_pictureWidth <= _BoatWidth || _pictureHeight <= _BoatHeight)
        {
            _pictureWidth = null;
            _pictureHeight = null;
            return;
        }
        if (_startPosX + _BoatWidth > _pictureWidth)
        {
            _startPosX = _pictureWidth - _BoatWidth;
        }
        if (_startPosY + _BoatHeight > _pictureHeight)
        {
            _startPosY = _pictureHeight - _BoatHeight;
        }
    }
}