public class Koordinatensystem {
    public char[][] koordinaten;
    private Faltung f;
    private int currentX;
    private int currentY;
    private int connectionX;
    private int connectionY;
    private int currentDirection;

    public Koordinatensystem(Faltung f) {
        this.f = f;
        int dimension = f.getSaeuren().size()*2 + 1;

        koordinaten = new char[dimension][dimension];
        init();
        if(!fill())
            System.out.println("OVERLAP DETECTED ! ");
        else {
            print();
            System.out.println("Energy is: " + computeEnergy());
        }
    }

    private int computeEnergy() {
        int energy = 0;
        char c1;
        char c2;
        for(int i = 0; i < koordinaten.length; i++) {
            for(int j = 2; j < koordinaten[i].length; j+=2) {
                boolean validChar = koordinaten[i][j-2] != 'x' && koordinaten[i][j] != 'x';
                if(validChar) {
                    c1 = koordinaten[i][j-2];
                    c2 = koordinaten[i][j-2];
                    if(c1 == c2 && koordinaten[i][j-1] == 'x') {
                        System.out.println("Match in row " + i + " Column " + j);
                        energy++;
                    }
                }
            }
        }

        return energy;
    }

    private void init() {
        for(int i = 0; i < koordinaten.length; i++) {
            for(int j = 0; j < koordinaten[i].length; j++) {
                koordinaten[i][j] = 'x';
            }
        }
    }

    public void print() {
        for(int i = 0; i < koordinaten.length; i++) {
            for(int j = 0; j < koordinaten[i].length; j++) {
                System.out.print(koordinaten[i][j] + " ");
            }
            System.out.println("\n");
        }
        System.out.println("----- ENDE ----");
    }

    private boolean fill() {
        currentX = f.getSaeuren().size();
        currentY = currentX;
        currentDirection = Direction.RIGHT;
        boolean first = true;

        for(Aminosaeure s : f.getSaeuren()) {
            print();

            if(first) {
                koordinaten[currentY][currentX] =  (char) (s.getColor() + 48);
                currentDirection = Direction.RIGHT;
                first = false;
                continue;
            }
                switch(currentDirection) {
                case Direction.DOWN:
                    if(s.getDirection() == Direction.RIGHT) {
                        currentX = currentX - 1;
                        currentDirection = Direction.LEFT;
                    }
                    else if(s.getDirection() == Direction.LEFT) {
                        currentX = currentX + 1;
                        currentDirection = Direction.RIGHT;
                    }
                    else if(s.getDirection() == Direction.STRAIGHT) {
                        currentY = currentY + 1;
                    }
                    break;
                case Direction.LEFT:
                    if(s.getDirection() == Direction.RIGHT) {
                        currentY = currentY - 1;
                        currentDirection = Direction.UP;
                    }
                    else if(s.getDirection() == Direction.LEFT) {
                        currentY = currentY + 1;
                        currentDirection = Direction.DOWN;
                    }
                    else if(s.getDirection() == Direction.STRAIGHT) {
                        currentX = currentX - 1;
                    }
                    break;
                case Direction.RIGHT:
                    if(s.getDirection() == Direction.RIGHT) {
                        currentY = currentY + 1;
                        currentDirection = Direction.DOWN;
                    }
                    else if(s.getDirection() == Direction.LEFT) {
                        currentY = currentY - 1;
                        currentDirection = Direction.UP;
                    }
                    else if(s.getDirection() == Direction.STRAIGHT)
                        currentX = currentX + 1;
                    break;
                case Direction.UP:
                    if(s.getDirection() == Direction.RIGHT) {
                        currentX = currentX + 1;
                        currentDirection = Direction.LEFT;
                    }
                    else if(s.getDirection() == Direction.LEFT) {
                        currentX = currentX - 1;
                        currentDirection = Direction.RIGHT;
                    }
                    else if(s.getDirection() == Direction.STRAIGHT) {
                        currentY = currentY - 1;
                    }
                    break;
                }

                if(koordinaten[currentY][currentX] != 'x')
                    return false;

                koordinaten[currentY][currentX] = (char) (s.getColor() + 48);
        }

        return true;
    }
}