AnsiStylingTest.java

import java.util.Scanner;

public class AnsiStylingTest {

    // ANSI codes for styling
    public static final String RESET = "\u001B[0m";
    public static final String RED = "\u001B[31m";
    public static final String GREEN = "\u001B[32m";
    public static final String YELLOW = "\u001B[33m";
    public static final String BLUE = "\u001B[34m";
    public static final String WHITE = "\u001B[37m";

    public static final String BG_BLUE = "\u001B[44m";
    public static final String BG_GREEN = "\u001B[42m";

    public static final String BOLD = "\u001B[1m";
    public static final String UNDERLINE = "\u001B[4m";

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean running = true;

        while (running) {
            // Clear screen and redraw
            clearScreenWithBackground(BG_BLUE);
            drawPersistentHeader();

            System.out.print(GREEN + "\nEnter command (menu/exit): " + RESET);
            String input = scanner.nextLine().trim().toLowerCase();

            switch (input) {
                case "menu":
                    showMenu();
                    break;
                case "exit":
                    running = false;
                    break;
                case "calculator":
                    System.out.println(YELLOW + "Calculator mode selected (not implemented)." + RESET);
                    break;
                default:
                    System.out.println(RED + "Unknown command. Try again." + RESET);
            }
        }

        System.out.println(RED + "Exiting the program. Goodbye!" + RESET);
    }

    private static void clearScreenWithBackground(String backgroundColor) {
        System.out.print("\033[H\033[2J"); // Clear screen
        System.out.flush();

        // Simulate full background color
        System.out.print(backgroundColor);
        for (int i = 0; i < 50; i++) {
            System.out.println(" ".repeat(80)); // Adjust width for your terminal
        }
        System.out.print(RESET); // Reset styling
    }

    private static void drawPersistentHeader() {
        System.out.print("\033[0;0H"); // Move cursor to top-left
        System.out.println(BG_GREEN + BOLD + WHITE + "***************************************");
        System.out.println("*         WELCOME TO CLI KALK         *");
        System.out.println("*            (KALK v1.0)              *");
        System.out.println("***************************************" + RESET);
    }

    private static void showMenu() {
        clearScreenWithBackground(BG_GREEN);
        drawPersistentHeader();

        System.out.println(YELLOW + "\nAvailable Features:" + RESET);
        String[] headers = { "Feature", "Description" };
        String[][] data = {
            { "Calculator", "Evaluate expressions" },
            { "Linear Algebra", "Perform matrix operations" },
            { "Differentiation", "Find derivatives" }
        };

        printTable(headers, data);
        System.out.println("\n" + GREEN + "Enter your next command (calculator/exit):" + RESET);
    }

    private static void printTable(String[] headers, String[][] data) {
        System.out.println(BOLD + WHITE + "+----------------+----------------+");
        System.out.printf("| %-14s | %-14s |\n", headers[0], headers[1]);
        System.out.println("+----------------+----------------+" + RESET);

        for (String[] row : data) {
            System.out.printf("| %-14s | %-14s |\n", row[0], row[1]);
        }
        System.out.println(WHITE + "+----------------+----------------+" + RESET);
    }
}