import java.util.Observable;
import java.util.Observer;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.TilePane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;

public class Connect4View extends Application implements Observer
{
    Circle[][] slots = new Circle[6][7];
    Scene scene;

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

    @Override
    public void start(Stage stage)
    {
        Connect4View view = new Connect4View();
        Connect4Controller controller = new Connect4Controller(view);
        TilePane tilePane = new TilePane(8, 8);
        tilePane.setPrefRows(6);
        tilePane.setPrefColumns(7);
        tilePane.setPadding(new Insets(8));
        for(int i = 0;i < view.slots.length;i++)
        {
            for(int j = 0;j < view.slots[i].length;j++)
            {
                view.slots[i][j] = new Circle(20, Color.WHITE);
                tilePane.getChildren().add(view.slots[i][j]);
            }
        }
        tilePane.setOnMouseClicked(new EventHandler<MouseEvent>()
        {
            @Override
            public void handle(MouseEvent e)
            {
                int x = (int) e.getX();
                int col;

                if(x <= 52)
                    col = 0;
                else if(x > 52 && x <= 100)
                    col = 1;
                else if(x > 100 && x <= 148)
                    col = 2;
                else if(x > 148 && x <= 196)
                    col = 3;
                else if(x > 196 && x <= 244)
                    col = 4;
                else if(x > 244 && x <= 292)
                    col = 5;
                else
                    col = 6;
                try
                {
                    controller.humanTurn(col);
                    if(controller.isGameEnded())
                    {
                        new Alert(AlertType.INFORMATION, "You won!").showAndWait();
                        tilePane.setDisable(true);
                    }
                    else
                    {
                        controller.computerTurn();
                        if(controller.isGameEnded())
                        {
                            new Alert(AlertType.INFORMATION, "You lost!").showAndWait();
                            tilePane.setDisable(true);
                        }
                    }
                }
                catch(InvalidColumnException exception)
                {
                    new Alert(AlertType.ERROR, "Column full, pick somewhere else!").showAndWait();
                }
            }
        });
        scene = new Scene(tilePane, Color.BLUE);
        stage.setTitle("Connect 4");
        stage.setScene(scene);
        stage.show();
    }

    public void update(Observable o, Object arg)
    {
        slots[((Connect4MoveMessage) arg).row][((Connect4MoveMessage) arg).col].setFill(((Connect4MoveMessage) arg).color);
    }
}