package net.berack.upo.ai.gui;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSeparator;

import net.berack.upo.ai.decision.PrototypeGUI;
import net.berack.upo.ai.decision.VehicleGUI;
import net.berack.upo.ai.problem1.Puzzle8GUI;
import net.berack.upo.ai.problem2.TrisGUI;
import net.berack.upo.ai.problem3.LikelihoodWeightingGUI;

/**
 * Classe che rappresenta il main di tutto il progetto
 * In essa si può navigare in tutti gli esercizi e testarli
 * @author Berack
 */
public class MainGUI extends JFrame {

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

    public final Puzzle8GUI Puzzle8GUI = new Puzzle8GUI();
    public final TrisGUI TrisGUI = new TrisGUI();
    public final LikelihoodWeightingGUI LikelihoodWeightingGUI = new LikelihoodWeightingGUI();
    public final PrototypeGUI PrototypeGUI = new PrototypeGUI();
    public final VehicleGUI VehicleGUI = new VehicleGUI();

    private final Dimension size = new Dimension(500, 400);
    private final JMenuBar menuBar = new JMenuBar();

    /**
     * Crea una finestra con nulla da mostrare, ma si può visualizzare uno degli esercizi tramite
     * la barre dei menù che permette di cambiare da un esercizio all'altro
     */
    private MainGUI() {
        super("Progetto per AI");
        this.buildMenu();
        this.setJMenuBar(menuBar);

        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(this.size);
        this.setResizable(false);
        this.setLocationRelativeTo(null);
        this.setVisible(true);
    }

    /**
     * Crea la barra dei menu aggiungendo tutti i menù passati in input
     * @param menus una lista di menù da aggiungere
     */
    private void buildMenu(JMenu...menus) {
        menuBar.removeAll();
        var menu = new JMenu("View");

        var puzzle = new JMenuItem("Puzzle8 Game");
        puzzle.addActionListener(action -> this.setPanel(Puzzle8GUI));
        var tris = new JMenuItem("Tris Game");
        tris.addActionListener(action -> this.setPanel(TrisGUI));
        var lw = new JMenuItem("Likelihood Weighting");
        lw.addActionListener(action -> this.setPanel(LikelihoodWeightingGUI));
        var prototype = new JMenuItem("Prototype net");
        prototype.addActionListener(action -> this.setPanel(PrototypeGUI));
        var vehicle = new JMenuItem("Vehicle net");
        vehicle.addActionListener(action -> this.setPanel(VehicleGUI));

        menu.add(puzzle);
        menu.add(tris);
        menu.add(lw);
        menu.add(new JSeparator());
        menu.add(prototype);
        menu.add(vehicle);

        menuBar.add(menu);
        for(var m : menus) if(m != null) menuBar.add(m);
    }

    /**
     * Cambia il pannello principale con quello passato in input
     * Nel caso sia un pannello MyDecision allora mette anche uno scroll panel per far si che si
     * possano vedere tutti i nodi necessari
     * @param panel il pannello da mostrare
     */
    private void setPanel(MyPanel panel) {
        if(panel instanceof MyDecisionPanel) {
            var temp = new JPanel(new BorderLayout());
            temp.add(panel, BorderLayout.NORTH);
            temp.setBorder(BorderFactory.createEmptyBorder(5, 5, 0, 5));

            var scroll = new JScrollPane(temp);
            scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
            scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
            scroll.getVerticalScrollBar().setUnitIncrement(20);
            scroll.setPreferredSize(this.size);
            this.setContentPane(scroll);
        }
        else this.setContentPane(panel);

        this.buildMenu(panel.getMenu());
        panel.updateAll();

        this.pack();
        this.invalidate();
        this.validate();
        this.repaint();
    }
}