import java.awt.*;

/*
    Aufgabe 3) Zeichnen mit Schleifen und Methoden
*/
public class Aufgabe3 {

    private static void drawTriangle(double centerX, double centerY, double height, int direction) {
        direction = direction%4;
        final double shift = height;
        double[] center = {centerX, centerY};
        double[] point1;
        double[] point2;
        if (direction % 2 == 0) {
            final double x = centerX + (shift * (direction == 0 ? -1 : 1));
            point1 = getVerticalPoint(x, centerY, height, true);
            point2 = getVerticalPoint(x, centerY, height, false);
        } else {
            final double x = centerY + (shift * (direction == 1 ? 1 : -1));
            point1 = getHorizontalPoint(centerX, x, height, true);
            point2 = getHorizontalPoint(centerX, x, height, false);
        }
        StdDraw.polygon(merge(true, center, point1, point2), merge(false, center, point1, point2));
    }

    private static double[] merge(boolean x, double[]... points) {
        double[] cords = new double[points.length];
        for (int i = 0; i < points.length; i++) {
            if (x) {
                cords[i] = points[i][0];
            } else {
                cords[i] = points[i][1];
            }
        }
        return cords;
    }

    private static double[] getVerticalPoint(double centerX, double centerY, double height, boolean up) {
        final double[] cords = new double[2];
        cords[0] = centerX;
        cords[1] = centerY + (up ? height : -height);
        return cords;
    }

    private static double[] getHorizontalPoint(double centerX, double centerY, double height, boolean right) {
        final double[] cords = new double[2];
        cords[0] = centerX + (right ? height : -height);
        cords[1] = centerY;
        return cords;
    }


    private static void drawTrianglePattern(double centerX, double centerY, int height, int centerShift) { //Schleife lohnt sich aufgrund der verschiedenen States nicht
        final int pixelCenterShift = 1 * centerShift;
        drawTriangle(centerX - pixelCenterShift, centerY, height, 0);
        drawTriangle(centerX, centerY + pixelCenterShift, height, 1);
        drawTriangle(centerX + pixelCenterShift, centerY, height, 2);
        drawTriangle(centerX, centerY - pixelCenterShift, height, 3);
    }

    private static void drawTrianglePatternLine(double centerX, double centerY, int height, int growth, int distance) {
        //TODO: Implementieren Sie hier Ihre Lösung für die Angabe
    }

    public static void main(String[] args) {

        int pixelWidth = 200;
        int pixelHeight = 200;
        StdDraw.setCanvasSize(pixelWidth, pixelHeight);
        StdDraw.setXscale(0, pixelWidth);
        StdDraw.setYscale(0, pixelHeight);
        StdDraw.setPenColor(StdDraw.BLACK);
        StdDraw.setPenRadius(0.005);

        //TODO: Testen Sie die Methoden ausführlich
        drawTriangle(100, 100, 20, 0);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();
        drawTriangle(100, 100, 40, 1);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();
        drawTriangle(100, 100, 30, 2);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();
        drawTriangle(100, 100, 50, 3);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();


        drawTrianglePattern(100, 100, 50, 0);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();
        drawTrianglePattern(100, 100, 40, 10);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();
        drawTrianglePattern(100, 100, 20, 40);
        StdDraw.pause(2000); //Wartezeit 5 Sekunden
        StdDraw.clear();
        drawTrianglePattern(100, 100, 10, 20);
        StdDraw.pause(2000);//Wartezeit 5 Sekunden
        StdDraw.clear();

        pixelWidth = 700;
        pixelHeight = 200;
        StdDraw.setCanvasSize(pixelWidth, pixelHeight);
        StdDraw.setXscale(0, pixelWidth);
        StdDraw.setYscale(0, pixelHeight);
        StdDraw.setPenColor(StdDraw.BLACK);
        StdDraw.setPenRadius(0.005);

        drawTrianglePatternLine(50, 100, 20, 5, 20);
        //drawTrianglePatternLine(50, 100, 10, 3, 10);
        //drawTrianglePatternLine(50, 100, 10, 10, 15);
    }
}