package npw;

import painter.SPainter;
import shapes.SCircle;
import shapes.SSquare;

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

public class CircleOfSquares {
    public void paintTheImage (){
        int radius = getNumber ("circle radius"); // create a new method: getnumber
        int side = getNumber ("square side length");

        SPainter painter = new SPainter("Circle of Squares",radius*2+50,radius*2+50);
        painter.setBrushWidth(3);
        SCircle circle = new SCircle(radius);
        SSquare square = new SSquare(side);

        paintCircleOfSquare(painter,circle,square);//create a new method: paintCircleOfSquare
    }

    private void paintCircleOfSquare(SPainter painter, SCircle circle, SSquare square) {
        painter.mfd(circle.radius());
        painter.tr();

        double moved = 0;
        while (moved < circle.diameter()){
            double chord = chordLength(circle.radius()-moved,circle);//create a new method: chordLength
            int squares = squareOnLineCount(chord,square.side());//create a new method squareOnLineCount
            paintRow(painter,square,squares); // create a new method paintRow
            nextRow(painter,square.side()); // create a new method nextRow
            moved = moved +square.side();
        }

        painter.tl();
        painter.mfd(circle.radius());
    }

    private void nextRow(SPainter painter, double rowHeight) {
        painter.tr();
        painter.mfd(rowHeight);
        painter.tl();
    }

    private void paintRow(SPainter painter, SSquare square, int squaresToPaint) {
        double centerOffset = ((squaresToPaint*square.side())/2)-square.side()/2;
        painter.mbk(centerOffset);

        int painted = 0;
        while (painted<squaresToPaint){
            paintOneSquare(painter,square);
            painter.mfd(square.side());
            painted = painted + 1;
        }

        painter.mbk(centerOffset + square.side());

    }

    private void paintOneSquare(SPainter painter, SSquare square) {
        painter.setColor(randomColor());
        painter.paint(square);
        painter.setColor(Color.BLACK);
        painter.draw(square);
    }



    private static int squareOnLineCount(double lineLength, double sideLength) {
     int squares = ((int)Math.ceil((lineLength - sideLength)/sideLength)+1);
     return squares;
    }

    private double chordLength(double yOffset, SCircle circle) {
        double xLength = Math.sqrt(Math.pow(circle.radius(),2)-Math.pow(yOffset,2));
        double chordLength = xLength*2;
        return chordLength;
    }

    private static int getNumber(String prompt) {
        String nss = JOptionPane.showInputDialog(null,prompt+"?");
        Scanner scanner = new Scanner (nss);
        return scanner.nextInt();
    }
    private static Color randomColor() {
        Random rgen = new Random();
        int r = rgen.nextInt(256);
        int g = rgen.nextInt(256);
        int b = rgen.nextInt(256);
        return new Color(r,g,b);
    }

    public CircleOfSquares(){
        paintTheImage();
    }

    public static void main (String [] args){
        SwingUtilities.invokeLater(new Runnable(){
            public void run (){
                new CircleOfSquares();
            }
        });
    }


}