import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;

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

public class AWG_Widget extends JPanel {

	public static final int mapWidth = 300;
	public static final int mapHeight = 300;

	BorderLayout layout = new BorderLayout();
	JPanel northPanel, centerPanel;
	JButton bt_GetMap;
	//Holds the map
	JLabel map;
	ImageIcon mapIcon;
	// Combo Box for the types of maps: roadmap, satellite, terrain
	String[] mapTypesStringArray = {"roadmap","satellite","terrain"};
	String selectedMapType = "satellite";
	JComboBox mapTypesComboBox = new JComboBox(mapTypesStringArray);


	public AWG_Widget(){
		// Set layout
		setLayout(layout);
		// Sets a border around the pane
		this.setBorder(BorderFactory.createEtchedBorder());

		// inits panels
		northPanel 	= new JPanel(new FlowLayout(FlowLayout.CENTER));
		centerPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));

		// Creates components
		try {
			createMap();
        }
		catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
		bt_GetMap = new JButton("Get Map!");



		// Add components to panels
		try{
			createMap();

		}
		catch(IOException e){
			System.out.println("Bad output");
		}

		northPanel.add(mapTypesComboBox);
		northPanel.add(bt_GetMap);


		// Add panels to layout
		add(northPanel, BorderLayout.NORTH);
		add(centerPanel, BorderLayout.CENTER);

		// Add Listeners
		mapTypesComboBox.addItemListener(new ComboBoxItemListener());
		bt_GetMap.addActionListener(new ButtonListener());
	}

	public void createMap() throws IOException{
		String imageUrl = "https://maps.googleapis.com/maps/api/staticmap?center=10,-11.998672&zoom=6&size=612x612&scale=5&maptype=" + selectedMapType + "";
        String destinationFile = "image.jpg";
        String str = destinationFile;
        URL url = new URL(imageUrl);
        InputStream is = url.openStream();
        OutputStream os = new FileOutputStream(destinationFile);
        byte[] b = new byte[2048];
        int length;

        while ((length = is.read(b)) != -1) {
            os.write(b, 0, length);
        }

        is.close();
        os.close();

		mapIcon = new ImageIcon((new ImageIcon("image.jpg")).getImage().getScaledInstance(mapWidth, mapHeight,
            java.awt.Image.SCALE_SMOOTH));
		map = new JLabel(mapIcon);

		centerPanel.add(map);

	}

	// Item Listener Class
	class ComboBoxItemListener implements ItemListener{
		@Override
		public void itemStateChanged(ItemEvent e){

			if(e.getStateChange() == ItemEvent.SELECTED){

				if(e.getItem().equals("roadmap")){
					selectedMapType = "roadmap";

				}
				if(e.getItem().equals("satellite")){
					selectedMapType = "satellite";

				}
				if(e.getItem().equals("terrain")){
					selectedMapType = "terrain";


				}
			}
		}
	}
	class ButtonListener implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			try{

				centerPanel.remove(map);
				remove(centerPanel);
				repaint();
				revalidate();

				createMap();


				add(centerPanel, BorderLayout.CENTER);
				revalidate();
				repaint();
			}
			catch(IOException ex){
				System.out.println("Bad map");
			}
			catch(InterruptedException ex){
				System.out.println("Bad map");
			}


		}
	}

}