package custompcrusphase4;

import java.io.IOException;
import java.io.PrintWriter;
import javax.swing.JOptionPane;

/**
 * @author Aaron Hendrickx
 */
public class CustomPCrUsPhase4 {
    public static void main(String[] args) {
        // Show the welcome message.
        String welcomeMessage = new StringBuilder()
                .append("*** Welcome to the Custom PC-R-Us Online Ordering System ***\n\n")
                .append("You are now able to order your PC through online custom pc design system\n\n")
                .append("The PC options you can choose from are: Screen Size, CPU, RAM, HDD, and GPU")
                .toString();
        JOptionPane.showMessageDialog(null, welcomeMessage);

        // The current username and password.
        String username = null;
        String password = null;

        // Is this a returning user?
        int returning = JOptionPane.showConfirmDialog(null, "Are you a returning customer?");
        switch (returning) {
            case JOptionPane.YES_OPTION:
                username = requestString("Enter your username:");
                password = requestString("Enter your password:");
                break;

            case JOptionPane.NO_OPTION:
                username = requestString("Choose a username for your new account:");
                password = requestString("Choose a password for your new account:");
                break;

            case JOptionPane.CANCEL_OPTION:
                JOptionPane.showMessageDialog(null, "Your order has been cancelled.");
                return;
        }

        // Request the customer's contact information:
        String name          = requestString("Please enter your full name:");
        String phoneNumber   = requestString("Please enter your phone number:");
        String streetAddress = requestString("Please enter your street address:");
        String city          = requestString("Please enter your city:");
        String state         = requestString("Please enter your state:");
        String zip           = requestString("Please enter your zip code:");

        // Request Custom PC specifications:
        int screenSize = requestInt(1, 2, new StringBuilder()
                .append("Please select a screen size:\n\n")
                .append("Valid options are:\n")
                .append("1 - 15\"\n")
                .append("2 - 17\"\n")
                .toString());
        int cpuType = requestInt(1, 2, new StringBuilder()
                .append("Please select a CPU type:\n\n")
                .append("Valid options are:\n")
                .append("1 - AMD\n")
                .append("2 - Intel\n")
                .toString());
        int ramSize = requestInt(1, 4, new StringBuilder()
                .append("Please select the total amount of RAM:\n\n")
                .append("Valid options are:\n")
                .append("1 - 4 GB\n")
                .append("2 - 8 GB\n")
                .append("3 - 16 GB\n")
                .append("4 - 32 GB\n")
                .toString());
        int hddSize = requestInt(1, 2, new StringBuilder()
                .append("Please select a HDD size:\n\n")
                .append("Valid options are:\n")
                .append("1 - 500GB HDD\n")
                .append("2 - 500GB HDD w/ 100GB SSD\n")
                .toString());
        int gpuSize = requestInt(1, 2, new StringBuilder()
                .append("Please select GPU size:\n\n")
                .append("1 - 512 MB\n")
                .append("2 - 1 GB\n")
                .toString());
        int quantity = requestInt(1, 99, "Please enter the desired quantity (1 - 99):");

        try {
            // Open the output file.
            PrintWriter writer = new PrintWriter("Order.txt");

            // Write the custom information:
            writer.println(new StringBuilder()
                    .append(name).append(", ")
                    .append(phoneNumber).append(", ")
                    .append(streetAddress).append(", ")
                    .append(city).append(", ")
                    .append(state).append(", ")
                    .append(zip).append(", ")
                    .append(quantity).append(", ")
                    .append(screenSize).append(", ")
                    .append(cpuType).append(", ")
                    .append(ramSize).append(", ")
                    .append(hddSize).append(",")
                    .append (gpuSize)
                    .toString());

            // Flush and close the writer.
            writer.flush();
            writer.close();
        } catch (IOException e) {
            JOptionPane.showMessageDialog(null, "An internal error occurred, please try again later.");
            System.exit(-1);
        }

        // Show the order complete message:
        String completeMessage = new StringBuilder()
                .append("*** Thank you for ordering from Custom PC-R-Us ***\n\n")
                .append("Your order has been received and will be processed and shipped to:\n")
                .append("Name: ").append(name).append("\n")
                .append("Phone Number: ").append(phoneNumber).append("\n")
                .append("Street Address: ").append(streetAddress).append("\n")
                .append("City: ").append(city).append("\n")
                .append("State: ").append(state).append("\n")
                .append("Zip: ").append(zip).append("\n")
                .toString();
        JOptionPane.showMessageDialog(null, completeMessage);
    }

    private static int requestInt(int min, int max, String message) {
        for (int i = 0; i < 3; i++) {
            try {
                int result = Integer.parseInt(JOptionPane.showInputDialog(message));

                // Accept the value if the value is within the specified minimum and maximum range.
                if (result >= min && result <= max) {
                    return result;
                }
            } catch (NullPointerException e1) {
                // The order has been cancelled.
                JOptionPane.showMessageDialog(null, "Your order has been cancelled.");
                System.exit(-1);
            } catch (NumberFormatException e2) {
                // Ignore this exception.
            }
        }

        // The customer failed to enter the appropriate data if this point has been reached.
        JOptionPane.showMessageDialog(null, "Maximum tries exceeded, please try again later.");
        System.exit(-1);

        // This point should never be reached.
        return -1;
    }

    private static String requestString(String message) {
        for (int i = 0; i < 3; i++) {
            // Show the input dialog.
            String result = JOptionPane.showInputDialog(message);

            // Allow the customer to cancel the order at any stage.
            if (result == null) {
                JOptionPane.showMessageDialog(null, "Your order has been cancelled.");
                System.exit(-1);
            }

            // Accept the user's input if the result is not empty.
            if (!result.isEmpty()) {
                return result;
            }
        }

        // The customer failed to enter the appropriate data if this point has been reached.
        JOptionPane.showMessageDialog(null, "Maximum tries exceeded, please try again later.");
        System.exit(-1);

        // This point should never be reached.
        return null;
    }
}