import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import java.awt.event.*;
import java.sql.Time;
import java.util.Date;

public class Assignment1 extends JPanel implements ActionListener {
    private JButton bus;
    private JLabel currentTime, inputTime, dvetochki;
    private JTextField hours, minutes, busField ;



    public Assignment1() {
        setLayout(null);

        Date time = new Date();
        bus = new JButton("Bus");
        bus.addActionListener(this);
        hours=new JTextField("",5);
        minutes=new JTextField("",5);
        currentTime = new JLabel("The current time: " + time.getHours() + ":" + time.getMinutes());
        inputTime = new JLabel("Hrs:Min =");
        dvetochki = new JLabel(" : ");
        busField = new JTextField ("");

        bus.setBounds(50,100,130,25);
        hours.setBounds(70,50,50,30);
        minutes.setBounds(130,50,50,30);
        currentTime.setBounds(10,10,155,30);
        inputTime.setBounds(10,50,155,30);
        dvetochki.setBounds(120 ,47,30,30);
        busField.setBounds(10,140,215,50);


        add(bus);
        add(hours);
        add(minutes);
        add(currentTime);
        add(inputTime);
        add(dvetochki);
        add(busField);
    }

    public static boolean isInteger(String s) {
        try {
            Integer.parseInt(s);
        } catch(NumberFormatException e) {
            return false;
        } catch(NullPointerException e) {
            return false;
        }
        // only got here if we didn't return false
        return true;
    }

    public void actionPerformed(ActionEvent e) {
        Date time = new Date();
        int[][] timeTable;
        timeTable = new int[50][2];
        timeTable[0][0]=8;
        timeTable[0][1]=45;
        timeTable[1][0]=9;
        timeTable[1][1]=31;
        timeTable[2][0]=9;
        timeTable[2][1]=54;
        timeTable[3][0]=10;
        timeTable[3][1]=40;
        timeTable[4][0]=11;
        timeTable[4][1]=3;
        timeTable[5][0]=11;
        timeTable[5][1]=49;
        timeTable[6][0]=12;
        timeTable[6][1]=12;
        timeTable[7][0]=12;
        timeTable[7][1]=58;
        timeTable[8][0]=13;
        timeTable[8][1]=21;
        timeTable[9][0]=14;
        timeTable[9][1]=7;
        timeTable[10][0]=14;
        timeTable[10][1]=30;
        timeTable[11][0]=15;
        timeTable[11][1]=16;
        timeTable[12][0]=15;
        timeTable[12][1]=39;
        timeTable[13][0]=16;
        timeTable[13][1]=25;
        timeTable[14][0]=16;
        timeTable[14][1]=48;
        timeTable[15][0]=17;
        timeTable[15][1]=34;
        timeTable[16][0]=17;
        timeTable[16][1]=57;
        timeTable[17][0]=18;
        timeTable[17][1]=43;
        timeTable[18][0]=19;
        timeTable[18][1]=6;
        timeTable[19][0]=19;
        timeTable[19][1]=52;
        timeTable[20][0]=20;
        timeTable[20][1]=15;

        if (e.getSource() == bus) {
            if (hours.getText().length() == 0 && minutes.getText().length() == 0){
                int response = JOptionPane.showConfirmDialog(null,"Time request is empty, would you like to proceed with the current time?", "Time Request Empty", JOptionPane.YES_NO_OPTION);
                if (response == JOptionPane.YES_OPTION){
                    hours.setText(Integer.toString(time.getHours()));
                    minutes.setText(Integer.toString(time.getMinutes()));
                    int hoursValue = Integer.parseInt(hours.getText());
                    int minutesValue = Integer.parseInt(minutes.getText());


                    for(int i=0;i<20;i++)
                    {
                        if(hoursValue<timeTable[0][0])
                        {
                            busField.setText("Next bus: " + timeTable[0][0]+":"+timeTable[0][1]);
                            break;
                        }
                        if(hoursValue>timeTable[20][0])
                        {
                            String a = busField.getText();
                            busField.setText(a + System.lineSeparator() + "Last bus was: " + timeTable[20][0]+":"+timeTable[20][1]);

                            break;
                        }

                        if(timeTable[i][0]==hoursValue)
                        {
                            for(int j=i;j<20;j++)
                            {

                                if(minutesValue<=timeTable[j][1])
                                {
                                    busField.setText("Next bus: " + timeTable[j][0]+ ":"+timeTable[j][1] + System.lineSeparator() + "Previous bus: " + timeTable[j-1][0]+ ":"+timeTable[j-1][1] );
                                    break;
                                }
                                busField.setText("Next bus: " + timeTable[j+1][0]+":"+timeTable[j+1][1] + System.lineSeparator() + "Previous bus: " + timeTable[j][0]+":"+timeTable[j][1] );
                                 break;

                            }
                            break;
                        }
                    }
                }
            }else if (isInteger(hours.getText()) && isInteger(minutes.getText())) {
                int hoursValue = Integer.parseInt(hours.getText());
                int minutesValue = Integer.parseInt(minutes.getText());
                for(int i=0;i<20;i++)
                {
                    if(hoursValue<timeTable[0][0])
                    {
                        busField.setText("Next bus: " + timeTable[0][0]+":"+timeTable[0][1]);
                        break;
                    }
                    if(hoursValue>timeTable[20][0])
                    {
                        String a = busField.getText();
                        busField.setText(a + System.lineSeparator() + "Last bus was: " + timeTable[20][0]+":"+timeTable[20][1]);

                        break;
                    }

                    if(timeTable[i][0]==hoursValue)
                    {
                        for(int j=i;j<20;j++)
                        {

                            if(minutesValue<=timeTable[j][1])
                            {
                                busField.setText("Next bus: " + timeTable[j][0]+ ":"+timeTable[j][1] + System.lineSeparator() + "Previous bus: " + timeTable[j-1][0]+ ":"+timeTable[j-1][1] );
                                break;
                            }
                            busField.setText("Next bus: " + timeTable[j+1][0]+":"+timeTable[j+1][1] + System.lineSeparator() + "Previous bus: " + timeTable[j][0]+":"+timeTable[j][1] );
                            break;

                        }
                        break;
                    }
                }
            }else{
                JOptionPane.showMessageDialog(null,"Please enter an integer number in the field.","Input Error", JOptionPane.ERROR_MESSAGE);
            }

                  }

    }
    public static void main(String[] arg) {
        JFrame f = new JFrame("Buses");
        f.getContentPane().add(new Assignment1());
        f.setSize(250,250);
        f.setLocation(300,300);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.show();
    }
}