package ecrosogames.celldefender;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Image;
import java.awt.Insets;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.UIManager;

public class MainMenu {

    private static final short WIDTH = 440;
    private static final short HEIGHT = WIDTH;

    private JFrame frame;
    private JPanel pane, paneT, paneC, paneB;
    private JLabel lblTitle, lblFooter;
    private JButton btn1, btn2, btn3, btn4;

    private Font font;

    public MainMenu() {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        } catch (Exception e) {
            e.printStackTrace();
        }
        Image bgImg = new ImageIcon(this.getClass().getResource("/icon/background.png")).getImage();

        frame = new JFrame();
        pane = new ImagePanel(bgImg);
        paneT = new JPanel();
        paneC = new JPanel();
        paneB = new JPanel();
        lblTitle = new JLabel("Cell Defender");
        lblFooter = new JLabel("Footer");
        btn1 = new JButton("Regular");
        btn2 = new JButton("Hardmode");
        btn3 = new JButton("Survival");
        btn4 = new JButton("Swarm");

        initPane();
        initFrame();
    }

    private void initFrame() {
        frame.setTitle("Cell Defender");
        frame.setResizable(false);
        frame.add(pane);
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    private void initPane() {
        pane.setPreferredSize(new Dimension(WIDTH, HEIGHT));
        pane.setLayout(new BorderLayout());
        paneT.setOpaque(false);
        paneC.setLayout(new GridBagLayout());
        paneC.setOpaque(false);
        paneB.setPreferredSize(new Dimension(WIDTH, 150));
        paneB.setLayout(new BorderLayout());
        paneB.setOpaque(false);

        font = new Font("Courier New", 0, 36);
        lblTitle.setForeground(Color.white);
        lblTitle.setFont(font);

        paneT.add(lblTitle);

        customizeButton(btn1);
        customizeButton(btn2);
        customizeButton(btn3);
        customizeButton(btn4);

        GridBagConstraints gbc = new GridBagConstraints();

        int insets = 10;

        gbc.insets = new Insets(insets, insets, insets, insets);
        gbc.gridy = 0;
        paneC.add(btn1, gbc);
        gbc.gridy = 1;
        paneC.add(btn2, gbc);
        gbc.gridy = 2;
        paneC.add(btn3, gbc);
        gbc.gridy = 3;
        paneC.add(btn4, gbc);

        lblFooter.setFont(font);
        lblFooter.setHorizontalAlignment(SwingConstants.CENTER);
        paneB.add(lblFooter, BorderLayout.CENTER);

        pane.add(paneT, BorderLayout.NORTH);
        pane.add(paneC, BorderLayout.CENTER);
        pane.add(paneB, BorderLayout.SOUTH);
    }

    private void customizeButton(JButton b) {
        Font f = new Font(null, 1, 12);

        b.setPreferredSize(new Dimension(200, 35));
        b.setFocusPainted(false);
        b.setFont(f);
    }

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

    class ImagePanel extends JPanel {
        private static final long serialVersionUID = 1L;

        private Image img;

        public ImagePanel(String img) {
            this(new ImageIcon(img).getImage());
        }

        public ImagePanel(Image img) {
            this.img = img;
            Dimension size = new Dimension(img.getWidth(null), img.getHeight(null));
            setPreferredSize(size);
            setMinimumSize(size);
            setMaximumSize(size);
            setSize(size);
            setLayout(null);
        }

        public void paintComponent(Graphics g) {
            g.drawImage(img, 0, 0, null);
        }
    }