import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.event.ActionEvent;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;

import javax.swing.AbstractAction;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.Bounds;
import org.openstreetmap.josm.data.coor.LatLon;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.Segment;
import org.openstreetmap.josm.data.osm.Way;
import org.openstreetmap.josm.data.osm.visitor.AddVisitor;
import org.openstreetmap.josm.gui.MapFrame;
import org.openstreetmap.josm.io.OsmWriter;
import org.openstreetmap.josm.plugins.Plugin;


public class OsmarenderPlugin extends Plugin {

	private class Action extends AbstractAction {

		public Action() {
			super("Osmarender");
		}

		public void actionPerformed(ActionEvent e) {
			// get all stuff visible on screen
			LatLon bottomLeft = Main.map.mapView.getLatLon(0,Main.map.mapView.getHeight());
			LatLon topRight = Main.map.mapView.getLatLon(Main.map.mapView.getWidth(), 0);
			Bounds b = new Bounds(bottomLeft, topRight);
			Collection<Node> nodes = new HashSet<Node>();
			DataSet fromDataSet = new DataSet();
			AddVisitor adder = new AddVisitor(fromDataSet);
			for (Node n : Main.ds.nodes) {
				if (n.coor.isWithin(b)) {
					n.visit(adder);
					nodes.add(n);
				}
			}
			Collection<Segment> segments = new HashSet<Segment>();
			for (Segment s : Main.ds.segments) {
				if (nodes.contains(s.from) || nodes.contains(s.to)) {
					s.visit(adder);
					segments.add(s);
				}
			}
			for (Way w : Main.ds.ways) {
				for (Segment s : w.segments) {
					if (segments.contains(s)) {
						w.visit(adder);
						break;
					}
				}
			}

			String firefox = Main.pref.get("osmarender.firefox", "firefox");
			boolean retry = false;
			do {
				try {
					retry = false;

					// write to plugin dir
					OsmWriter.output(new FileOutputStream(getPluginDir()+"data.osm"), new OsmWriter.All(fromDataSet, true));

					// get the exec line
					String exec = firefox;
					if (System.getProperty("os.name").startsWith("Windows"))
						exec += " file:///"+getPluginDir().replace('\\','/').replace(" ","%20")+"osm-map-features.xml\"";
					else
						exec += " "+getPluginDir()+"osm-map-features.xml";

					// launch up the viewer
					Runtime.getRuntime().exec(exec);
				} catch (IOException e1) {
					firefox = JOptionPane.showInputDialog(Main.parent, "FireFox not found. Please enter location of firefox executable");
					if (firefox != null) {
						Main.pref.put("osmarender.firefox", firefox);
						retry = true;
					}
				}
			} while (retry);
		}
	}

	private JMenu view;
	private JMenuItem osmarenderMenu = new JMenuItem(new Action());

	public OsmarenderPlugin() throws IOException {
		JMenuBar menu = Main.main.menu;
		view = null;
		for (int i = 0; i < menu.getMenuCount(); ++i) {
			if (menu.getMenu(i) != null && tr("View").equals(menu.getMenu(i).getName())) {
				view = menu.getMenu(i);
				break;
			}
		}
		if (view == null) {
			view = new JMenu(tr("View"));
			menu.add(view, 2);
			view.setVisible(false);
		}
		view.add(osmarenderMenu);
		osmarenderMenu.setVisible(false);

		// install the xsl and xml file
		copy("/osmarender.xsl", "osmarender.xsl");
		copy("/osm-map-features.xml", "osm-map-features.xml");
	}

	@Override
	public void mapFrameInitialized(MapFrame oldFrame, MapFrame newFrame) {
		if (oldFrame != null && newFrame == null) {
			// disable
			osmarenderMenu.setVisible(false);
			if (view.getMenuComponentCount() == 1)
				view.setVisible(false);
		} else if (oldFrame == null && newFrame != null) {
			// enable
			osmarenderMenu.setVisible(true);
			if (view.getMenuComponentCount() == 1)
				view.setVisible(true);
		}
	}
}