dsaProject

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

public class DSAProject implements ActionListener {
    private ArrayList<String> seats = new ArrayList<>();
    private JFrame frame;
    private JPanel panel;
    private JButton reserveButton, viewButton, cancelButton;
    private JTextArea textArea;

    public DSAProject() {
        // create the GUI components
        frame = new JFrame("Bus Reservation System");
        frame.setSize(500, 500);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        panel = new JPanel(new GridLayout(2, 2));

        reserveButton = new JButton("Reserve");
        viewButton = new JButton("View available schedules");
        cancelButton = new JButton("Cancel a reservation");

        textArea = new JTextArea();
        textArea.setEditable(false);

        JScrollPane scrollPane = new JScrollPane(textArea);

        // add the components to the panel
        panel.add(reserveButton);
        panel.add(viewButton);
        panel.add(cancelButton);

        // add the panel and text area to the frame
        frame.add(panel, BorderLayout.NORTH);
        frame.add(scrollPane, BorderLayout.CENTER);

        // register event listeners for the buttons
        reserveButton.addActionListener(this);
        viewButton.addActionListener(this);
        cancelButton.addActionListener(this);

        // make the frame visible
        frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == reserveButton) {
            reserveSeat();
        } else if (e.getSource() == viewButton) {
            viewSeats();
        } else if (e.getSource() == cancelButton) {
            cancelReservation();
        }
    }

    private void reserveSeat() {
        String from = JOptionPane.showInputDialog(frame, "Where are you coming from?");
        String[] destinations = {"Manila", "Cebu", "Davao"};
        String destination = (String) JOptionPane.showInputDialog(frame, "Select your destination:",
                "Destination", JOptionPane.QUESTION_MESSAGE, null, destinations, destinations[0]);

        // Display available schedules
        String[] schedules = {"9:00 AM - 12:00 PM", "1:00 PM - 4:00 PM", "5:00 PM - 8:00 PM"};
        String schedule = (String) JOptionPane.showInputDialog(frame, "Select your preferred schedule:",
                "Schedule", JOptionPane.QUESTION_MESSAGE, null, schedules, schedules[0]);

        // Display available seats for selected schedule
        ArrayList<String> availableSeats = new ArrayList<>();
        for (int i = 1; i <= 20; i++) {
            String seatNumber = Integer.toString(i);
            if (!seats.contains(schedule + ", Seat " + seatNumber)) {
                availableSeats.add("Seat " + seatNumber);
            }
        }

        if (availableSeats.isEmpty()) {
            JOptionPane.showMessageDialog(frame, "Sorry, all seats for the selected schedule are taken.");
        } else {
            // Prompt user to select a seat
            String[] seatOptions = availableSeats.toArray(new String[0]);
            String seatNumber = (String) JOptionPane.showInputDialog(frame, "Select your preferred seat:",
                    "Seat", JOptionPane.QUESTION_MESSAGE, null, seatOptions, seatOptions[0]);

            // Generate a random reservation ID
            String reservationId = String.format("%04d", (int) (Math.random() * 10000));

            // Reserve the selected seat for the selected schedule
            String reservation = reservationId + ", " + schedule + ", " + seatNumber;
            seats.add(reservation);
            JOptionPane.showMessageDialog(frame, "Your reservation from " + from + " to " + destination +
                    " at " + schedule + " for " + seatNumber + " with reservation ID " + reservationId + " has been confirmed.");

            // Remove the selected seat from the list of available seats
            availableSeats.remove(seatNumber);

            // Update the view button to show the updated list of available seats for the selected schedule
            String availableSeatsText = "";
            for (String s : availableSeats) {
                availableSeatsText += s + "\n";
            }
            JOptionPane.showMessageDialog(frame, "Available seats for " + schedule + ":\n" + availableSeatsText);
        }
    }

    private void viewSeats() {
        textArea.setText("Available seats:\n");

        String[] destinations = {"Manila", "Cebu", "Davao"};
        String[] schedules = {"9:00 AM - 12:00 PM", "1:00 PM - 4:00 PM", "5:00 PM - 8:00 PM"};

        // iterate over destinations and schedules to show available seats
        for (String destination : destinations) {
            textArea.append("\n" + destination + ":\n");

            for (String schedule : schedules) {
                ArrayList<String> availableSeats = new ArrayList<>();

                // check available seats for current destination and schedule
                for (int i = 1; i <= 20; i++) {
                    String seatNumber = Integer.toString(i);
                    String reservation = schedule + ", Seat " + seatNumber + " to " + destination;

                    if (!seats.contains(reservation)) {
                        availableSeats.add("Seat " + seatNumber);
                    }
                }

                // show available seats for current destination and schedule
                textArea.append(schedule + ":\n");
                if (availableSeats.isEmpty()) {
                    textArea.append("  All seats are taken.\n");
                } else {
                    for (String seat : availableSeats) {
                        textArea.append("  " + seat + " ");
                        textArea.append("\n");
                    }
                }
            }
        }
    }

    private void cancelReservation() {
        String seatNumber = JOptionPane.showInputDialog(frame, "Enter the seat number you wish to cancel:");

        if (seats.contains(seatNumber)) {
            seats.remove(seatNumber);
            JOptionPane.showMessageDialog(frame, "Seat " + seatNumber + " has been cancelled.");
        } else {
            JOptionPane.showMessageDialog(frame, "Seat " + seatNumber + " is not reserved.");
        }
    }

    public static void main(String[] args) {
        new DSAProject();
    }
}