/*
 *  Freeplane - mind map editor
 *  Copyright (C) 2010 dimitry
 *
 *  This file author is dimitry
 *
 *  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, see <http://www.gnu.org/licenses/>.
 */
package org.freeplane.plugin.script;

import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;

import javax.swing.text.JTextComponent;

import org.freeplane.core.util.Compat;
import org.freeplane.core.util.LogUtils;
import org.osgi.framework.BundleContext;

/**
 * @author Dimitry Polivaev
 * Nov 6, 2010
 */
public class JSyntaxPaneProxy {
	private static URLClassLoader loader;
	private static Class<?> editorKit;
	private static Class<?> actionUtils;
	private static Method getLineNumberMethod;
	private static Method setCaretPositionMethod;

	static void init(BundleContext context) {
		if (loader != null) {
			return;
		}
		URL jsyntaxpaneJar;
		URL nodehighlighterJar;
		try {
			final URL pluginUrl = context.getBundle().getEntry("/");
			if (Compat.isLowerJdk(Compat.VERSION_1_6_0)) {
				jsyntaxpaneJar = new URL(pluginUrl, "lib/jsyntaxpane/jsyntaxpane-jdk5.jar");
			}
			else {
				jsyntaxpaneJar = new URL(pluginUrl, "lib/jsyntaxpane/jsyntaxpane.jar");
			}
			nodehighlighterJar = new URL(pluginUrl, "lib/jsyntaxpane/nodehighlighter.jar");
		}
		catch (MalformedURLException e1) {
			e1.printStackTrace();
			return;
		}
		final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
		final URL[] urls = new URL[] { jsyntaxpaneJar, nodehighlighterJar };
		loader = new URLClassLoader(urls, JSyntaxPaneProxy.class.getClassLoader());
		try {
			editorKit = loader.loadClass("jsyntaxpane.DefaultSyntaxKit");
			Thread.currentThread().setContextClassLoader(loader);
			editorKit.getMethod("initKit").invoke(null);
			actionUtils = loader.loadClass("jsyntaxpane.actions.ActionUtils");
			final String components = "jsyntaxpane.components.PairsMarker" //
					+ ", jsyntaxpane.components.LineNumbersRuler" //
					+ ", jsyntaxpane.components.TokenMarker" //
					+ ", org.freeplane.plugin.script.NodeIdHighLighter";
			final Class<?> groovySyntaxKit = loader.loadClass("jsyntaxpane.syntaxkits.GroovySyntaxKit");
			try{
				loader.loadClass("org.freeplane.plugin.script.NodeIdHighLighter");
				if (Compat.isLowerJdk(Compat.VERSION_1_6_0)) {
					final Method setPropertyMethod = editorKit.getMethod("setProperty", Class.class, String.class, String.class);
					setPropertyMethod.invoke(null, groovySyntaxKit, "Components", components);
				}
				else{
					final Method setPropertyMethod = editorKit.getMethod("setProperty", String.class, String.class);
					setPropertyMethod.invoke(groovySyntaxKit.newInstance(), "Components", components);
				}
			}
			catch (Exception e){
				LogUtils.warn(e);
			}
		}
		catch (Throwable e) {
			LogUtils.severe(e);
			throw new RuntimeException(e);
		}
		finally {
			Thread.currentThread().setContextClassLoader(contextClassLoader);
		}
	}

	public static int getLineOfOffset(JTextComponent mScriptTextField, int caretPosition) {
		try {
			if(getLineNumberMethod == null){
				getLineNumberMethod = actionUtils.getMethod("getLineNumber", JTextComponent.class, int.class);
			}
			return (Integer)getLineNumberMethod.invoke(null, mScriptTextField, caretPosition);
		}
		catch (Exception e) {
			e.printStackTrace();
			return 0;
		}
	}

	public static void gotoPosition(JTextComponent mScriptTextField, int line, int col) {
		try {
			if(setCaretPositionMethod == null){
				setCaretPositionMethod = actionUtils.getMethod("setCaretPosition", JTextComponent.class, int.class, int.class);
			}
			setCaretPositionMethod.invoke(null, mScriptTextField, line, col);
		}
		catch (Exception e) {
			e.printStackTrace();
		}
    }
}