/*FreeMind - A Program for creating and viewing Mindmaps
 *Copyright (C) 2000-2001  Joerg Mueller <joergmueller@bigfoot.com>
 *See COPYING for Details
 *
 *This program is free software; you can redistribute it and/or
 *modify it under the terms of the GNU General Public License
 *as published by the Free Software Foundation; either version 2
 *of the License, or (at your option) any later version.
 *
 *This program is distributed in the hope that it will be useful,
 *but WITHOUT ANY WARRANTY; without even the implied warranty of
 *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *GNU General Public License for more details.
 *
 *You should have received a copy of the GNU General Public License
 *along with this program; if not, write to the Free Software
 *Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


package freemind.modes.browsemode;

import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Writer;
import java.net.URL;
import java.security.AccessControlException;
import java.util.HashMap;

import freemind.main.FreeMindMain;
import freemind.modes.MapAdapter;
import freemind.modes.MindMapLinkRegistry;
import freemind.modes.ModeController;

public class BrowseMapModel extends MapAdapter {

	private URL url;
	private MindMapLinkRegistry linkRegistry;

	//
	// Constructors
	//
	public BrowseMapModel(FreeMindMain frame, ModeController modeController) {
		this(null, frame, modeController);
	}

	public BrowseMapModel(BrowseNodeModel root, FreeMindMain frame,
			ModeController modeController) {
		super(frame, modeController);
		if (root != null)
			setRoot(root);
		else
			setRoot(new BrowseNodeModel(getFrame().getResourceString(
					"new_mindmap"), getFrame(), modeController.getMap()));
		// register new LinkRegistryAdapter
		linkRegistry = new MindMapLinkRegistry();
	}

	//
	// Other methods
	//
	public MindMapLinkRegistry getLinkRegistry() {
		return linkRegistry;
	}

	public String toString() {
		if (getURL() == null) {
			return null;
		} else {
			return getURL().toString();
		}
	}

	public File getFile() {
		return null;
	}

	protected void setFile() {
	}

	/**
	 * Get the value of url.
	 * 
	 * @return Value of url.
	 */
	public URL getURL() {
		return url;
	}

	/**
	 * Set the value of url.
	 * 
	 * @param v
	 *            Value to assign to url.
	 */
	public void setURL(URL v) {
		this.url = v;
	}

	public boolean save(File file) {
		return true;
	}

	public boolean isSaved() {
		return true;
	}

	public void load(URL url) throws IOException {
		setURL(url);
		BrowseNodeModel root = loadTree(url);
		if (root != null) {
			setRoot(root);
		} else {
			// System.err.println("Err:"+root.toString());
			throw new IOException();
		}
	}

	BrowseNodeModel loadTree(URL url) {
		BrowseNodeModel root = null;

		InputStreamReader urlStreamReader = null;

		try {
			urlStreamReader = new InputStreamReader(url.openStream());
		} catch (AccessControlException ex) {
			getFrame().getController()
					.errorMessage(
							"Could not open URL " + url.toString()
									+ ". Access Denied.");
			System.err.println(ex);
			return null;
		} catch (Exception ex) {
			getFrame().getController().errorMessage(
					"Could not open URL " + url.toString() + ".");
			System.err.println(ex);
			// freemind.main.Resources.getInstance().logExecption(ex);
			return null;
		}

		try {
			HashMap IDToTarget = new HashMap();
			root = (BrowseNodeModel) getModeController().createNodeTreeFromXml(
					urlStreamReader, IDToTarget);
			urlStreamReader.close();
			return root;
		} catch (Exception ex) {
			System.err.println(ex);
			return null;
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see freemind.modes.MindMap#setLinkInclinationChanged()
	 */
	public void setLinkInclinationChanged() {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see freemind.modes.MindMap#getXml(java.io.Writer)
	 */
	public void getXml(Writer fileout) throws IOException {
		// nothing.
		// FIXME: Implement me if you need me.
		throw new RuntimeException("Unimplemented method called.");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see freemind.modes.MindMap#getFilteredXml(java.io.Writer)
	 */
	public void getFilteredXml(Writer fileout) throws IOException {
		// nothing.
		// FIXME: Implement me if you need me.
		throw new RuntimeException("Unimplemented method called.");
	}
}