package mainPackage;

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

public class Main extends JComponent {
    static class Canvas extends JPanel{

        int nx = 40;// цена деления  по шкалам
        int ny = 40;
        int oyn = 250; // начальный отступ по y
        int oxn = 350 ; //начальный отступ по х
        int ly = 500; // длина оси у
        int lx = 700; // длина оси х

        public static double evaluate(double x) {
            return x*Math.sin(x);
        }

        public static Vector<Integer> getScreenCoords(Vector<Double> old_c, double a, double b) {
            Vector<Integer> new_c = new Vector< Integer>();
            int curr_c;
            for (Double anOld_c : old_c) {
                curr_c = (int) (anOld_c * a + b);
                new_c.add(curr_c);
            }
            return new_c;
        }

        public static void draw_graph(Vector<Integer> x, Vector<Integer> y, Graphics2D g) {
            int size = x.size();
            for (int i = 0; i < size - 1; i++) {
               g.drawLine(x.get(i), y.get(i),
                          x.get(i + 1), y.get(i + 1));
            }
        }

        public void draw_coord_lines(Graphics g) {
            g.drawLine(oxn, (int) ly / 2 - oyn,
                    oxn, (int) ly / 2 + oyn);
            g.drawLine( oxn , -1 ,
                    oxn - 3 , 10 );
            g.drawLine(oxn, -1,
                    oxn + 3, 10);

            g.drawLine( (int)(lx/2) - oxn, oyn,
                    (int)(lx/2) + oxn, oyn);
            g.drawLine( (int)(lx/2)+ oxn , oyn,
                    (int)(lx/2) + oxn - 10 , oyn - 3 );
            g.drawLine(lx, oyn,
                    lx - 10, oyn + 3);
        }

        public void paintComponent(Graphics g){
            super.paintComponents(g);

            double a = -1;
            double b = 1;

            Graphics2D g2d = (Graphics2D) g;
//            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

            Vector<Double> y1 = new Vector<Double>();
            double max_y = 0;
            double min_y = ly;
            Vector<Integer> x_c = new Vector<Integer>();
            Vector<Integer> y_c = new Vector<Integer>();
            for (int i = 0; i < lx; ++i) {
                double x = a + i*(b - a)/lx;
                double y = evaluate(x);
                y1.add(y);
                x_c.add(i);
                max_y = Math.max(max_y, y);
                min_y = Math.min(min_y, y);
            }

            int yy = (int)((evaluate(a)-min_y)*ly/(max_y-min_y));
            y_c.add(0, yy);
            double y;
            for (int xx=1;xx<lx;++xx)
            {
                y = y1.get(xx);
                yy = (int)((y-max_y)*ly/(min_y - max_y));
                y_c.add(yy);
            }

            System.out.println(y_c.size());
            System.out.println(x_c.size());


/*            double maxC = 0;
            double tempY;
            while(l <= b) {
                x1.add(l);
                tempY = evaluate(l)*(-1);
                y1.add(tempY);
                maxC = Math.abs((evaluate(l)));
                l += interv;
            }

//            nx = (int)(lx/(2*maxC));

            int n_ny = (int)(ly / ((int)(maxC)));
            Vector<Integer> n_x = getScreenCoords(x1, nx, oxn);
            Vector<Integer> n_y = getScreenCoords(y1, n_ny, oyn);*/

//            draw_graph(n_x, n_y, g);
            draw_graph(x_c, y_c, g2d);

//            draw_coord_lines(g);

//            for (int i = 0; i < lx; i += nx){
//                g.drawLine(i, oyn - 1, i, oyn + 1);
//            }
//
//            for (int i = 0; i < ly; i += ny) {
//                g.drawLine(oxn - 1, i, oxn + 1, i);
//            }

            super.repaint();
        }
    }

    public static void main(String[] args) {
        double a = 0;
        double b = 5;
        double intev = (b - a)/1000000;
        double ind = 0;

        JFrame w=new JFrame("Function");
//        w.setLayout(new BorderLayout());

//        w.setSize(715, 515);

        w.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Canvas canv=new Canvas();
        w.getContentPane().add(canv);
//        w.add(canv);
        w.setLocationRelativeTo(null);
        w.setVisible(true);
    }
}