import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class KalkulatorView{

    KalkulatorController controller;
    JLabel resultat;

    public KalkulatorView(KalkulatorController controller){

        this.controller = controller;

        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
                System.exit(1);
        }

        // Opprette vindu
        JFrame vindu = new JFrame();
        vindu.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        //          Legg til innhold        //

        // Lage hovedpanel
        JPanel hovedpanel = new JPanel();
        hovedpanel.setLayout(new BorderLayout());
        vindu.add(hovedpanel);

        // Lage resultatpanel
        JPanel resultatpanel = new JPanel();
        hovedpanel.add(resultatpanel, BorderLayout.NORTH);

        resultat = new JLabel("resultat");
        resultatpanel.add(resultat);

        //Lage tallknappanel
        JPanel tallknappanel = new JPanel();
        tallknappanel.setLayout(new GridLayout(4,3));
        hovedpanel.add(tallknappanel, BorderLayout.CENTER);

        for (int i = 1; i <= 9; i++){
            JButton tallknapp = new Tallknapp(Integer.toString(i), controller);
            tallknappanel.add(tallknapp);
        }
        JButton knapp1 = new JButton("C");
        tallknappanel.add(knapp1);
        JButton knapp2 = new JButton("0");
        tallknappanel.add(knapp2);
        JButton knapp3 = new JButton(",");
        tallknappanel.add(knapp3);



        // lage operatorknappanel
        JPanel operatorknappanel = new JPanel();
        operatorknappanel.setLayout(new GridLayout(5, 1));
        hovedpanel.add(operatorknappanel, BorderLayout.EAST);

        JButton plussknapp = new JButton("+");
        operatorknappanel.add(plussknapp);
        JButton minusknapp = new JButton("-");
        operatorknappanel.add(minusknapp);
        JButton gangeknapp = new JButton("x");
        operatorknappanel.add(gangeknapp);
        JButton deleknapp = new JButton("/");
        operatorknappanel.add(deleknapp);
        JButton erLikKnapp = new JButton("=");
        operatorknappanel.add(erLikKnapp);



        //      Gj?r vindu synlig       //
        vindu.pack();
        vindu.setLocationRelativeTo(null);
        vindu.setVisible(true);
    }

    public void oppdaterResultat(String nyttResultat){
        resultat.setText(nyttResultat);
    }
}