Implement all required tasks

src/main/java/workshop/Controller.java

@@ -1,39 +1,64 @@
 package workshop;
 
 import javafx.fxml.FXML;
+import javafx.scene.control.Alert;
 import javafx.scene.control.Label;
 import javafx.scene.control.Button;
 
 public class Controller {
+    @FXML public Label basicPriceLabel;
+    @FXML public Label proPriceLabel;
+    @FXML public Label enterprisePriceLabel;
     @FXML private Label titleLabel;
     @FXML private Button themeToggle;
 
     private boolean isDark = true;
 
+    @FXML
+    public void initialize() {
+        basicPriceLabel.setText("$12.99 / month");
+        proPriceLabel.setText("$21.99 / month");
+    }
     // TODO: (Optional) Create initialize function and use it to set prices during runtime.
 
     @FXML
     private void buyBasic() {
+        showAlert("Basic plan selected.", Alert.AlertType.INFORMATION);
         // TODO: Call showAlert() with a message indicating the user entered the payment gateway
     }
 
     @FXML
     private void buyPro() {
+        showAlert("Pro plan selected.", Alert.AlertType.INFORMATION);
         // TODO: Call showAlert() with a message indicating the user entered the payment gateway
     }
 
     @FXML
     private void buyEnterprise() {
+        showAlert("Enterprise plan selected.", Alert.AlertType.INFORMATION);
         // TODO: Call showAlert() with a message indicating the user entered the payment gateway
     }
 
     @FXML
     private void toggleTheme() {
+        isDark = !isDark;
+        if (isDark) {
+            themeToggle.setText("Switch to light mode");
+            themeToggle.getScene().getStylesheets().clear();
+            themeToggle.getScene().getStylesheets().add(getClass().getResource("style.css").toExternalForm());
+        } else {
+            themeToggle.setText("Switch to dark mode");
+            themeToggle.getScene().getStylesheets().clear();
+            themeToggle.getScene().getStylesheets().add(getClass().getResource("light.css").toExternalForm());
+        }
         // TODO: Toggle the isDark flag. If dark, switch to style.css and set button text to "Switch to Light Mode"
         // TODO: If light, switch to light.css and set button text to "Switch to Dark Mode"
     }
 
-    private void showAlert(String message) {
+    private void showAlert(String message, Alert.AlertType alertType) {
+        Alert alert = new Alert(alertType);
+        alert.setHeaderText(message);
+        alert.show();
         // TODO: Create a new Alert of type INFORMATION with the given message and display it
     }
 }