import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import javafx.util.Duration;

public class WhackAMouse extends Application {

    // constants
    private static final int BN_SIZE = 75; 
    private static final int N_ROWS  = 5;
    private static final int N_COLS  = 7;
    private static final int APP_WIDTH  = N_COLS * BN_SIZE;
    private static final int APP_HEIGHT = N_ROWS * BN_SIZE;
    private static final String IMG_NAME = "file:Mouse.gif"; // imgName
    
    private static final int INTERVAL = 500;   // msec
    private static final int DURATION = 5;     // seconds
    
    // GUI variables
    private BorderPane mainPane;
    private HBox       controlPanel;
    private GridPane   grid;
    private Button[][] buttons;
    private ImageView  ivMouse;
    
    private Timeline   timerMain;
    
    
    // functional variables
    private int score; // gain if user clicks on the mouse button
    
    public void start(Stage stage) {
        // setup calls
        setupControlPanel();
        setupImage();
        setupBoard();
        setupTimers();
        
        assignMouse();
        
        Scene scene = new Scene(mainPane, APP_WIDTH, APP_HEIGHT);
        
        stage.setTitle("CS112 F24 Whack-A-Mouse");
        stage.setScene(scene);
        
        stage.show();
        
        // TEMPORARY
        timerMain.play();
    }
    
    private void setupControlPanel() {
        controlPanel = new HBox();        
        mainPane.setTop(controlPanel);
        
        // create buttons
        
        // create labels
        
    }
    
    private void setupImage() {
        ivMouse = new ImageView( new Image(IMG_NAME) );
    }
    
    private void setupBoard() {
        grid = new GridPane();
        mainPane.setCenter(grid);
        
        buttons = new Button[N_ROWS][N_COLS];
        
        for (int r = 0; r < N_ROWS; ++r) {
            for (int c = 0; c < N_COLS; ++c) {
                Button bn = new Button();
                bn.setPrefSize(BN_SIZE, BN_SIZE);
                
                // add to array
                buttons[r][c] = bn;
                
                bn.setOnAction( e -> { 
                    onClick(e);
                });
                
                // add to board (grid pane)
                grid.add(bn, c, r);
            }
        }
    }
    
    private void onClick(ActionEvent e) {
        Object src = e.getSource();
        Button clickedButton = (Button) src;
        
        // if the clicked button has the graphics, user scores
        if (clickedButton.getGraphic() != null) {
            ++score;
        }
        else {
            --score;
        }
        
        System.out.println("Current score = " + score);
    }
    
    private void setupTimers() {
        // setup key frame
        KeyFrame keyFrame = new KeyFrame(Duration.millis(500), e -> { assignMouse(); });
        
        // setup timerMain
        timerMain = new Timeline(keyFrame);
        timerMain.setCycleCount(10);
    }
    
    private void assignMouse() {
        // generate two random integers (row, column)
        int row = (int) (Math.random() * N_ROWS);
        int col = (int) (Math.random() * N_COLS);
        
        // assign ivMouse to the button at (row, column)
        buttons[row][col].setGraphic(ivMouse);
    }
    
    public static void main(String[] args) {
        launch(args);
    }

}