/*******************************************************************************
 * Copyright (c) 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.jsp.core.internal;

import java.text.MessageFormat;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.Plugin;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.jst.jsp.core.internal.contentmodel.TaglibController;
import org.eclipse.jst.jsp.core.internal.java.search.JSPIndexManager;
import org.eclipse.jst.jsp.core.internal.java.search.JSPSearchSupport;
import org.eclipse.wst.sse.core.internal.encoding.CommonCharsetNames;
import org.eclipse.wst.sse.core.internal.encoding.CommonEncodingPreferenceNames;
import org.eclipse.wst.sse.core.preferences.CommonModelPreferenceNames;
import org.osgi.framework.BundleContext;

/**
 * The main plugin class to be used in the desktop.
 */
public class JSPCorePlugin extends Plugin {
	//The shared instance.
	private static JSPCorePlugin plugin;
	//Resource bundle.
	private ResourceBundle resourceBundle;
	private static final String KEY_PREFIX = "%"; //$NON-NLS-1$
	private static final String KEY_DOUBLE_PREFIX = "%%"; //$NON-NLS-1$	

	/**
	 * The constructor.
	 */
	public JSPCorePlugin() {
		super();
		plugin = this;
	}

	/**
	 * Returns the shared instance.
	 */
	public static JSPCorePlugin getDefault() {
		return plugin;
	}

	/**
	 * Returns the workspace instance.
	 */
	public static IWorkspace getWorkspace() {
		return ResourcesPlugin.getWorkspace();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.core.runtime.Plugin#initializeDefaultPluginPreferences()
	 */
	protected void initializeDefaultPluginPreferences() {
		Preferences prefs = getDefault().getPluginPreferences();
		// set model preference defaults
		prefs.setDefault(CommonModelPreferenceNames.CLEANUP_TAG_NAME_CASE, CommonModelPreferenceNames.ASIS);
		prefs.setDefault(CommonModelPreferenceNames.CLEANUP_ATTR_NAME_CASE, CommonModelPreferenceNames.ASIS);
		prefs.setDefault(CommonModelPreferenceNames.INSERT_MISSING_TAGS, true);
		prefs.setDefault(CommonModelPreferenceNames.QUOTE_ATTR_VALUES, true);
		prefs.setDefault(CommonModelPreferenceNames.FORMAT_SOURCE, true);
		prefs.setDefault(CommonModelPreferenceNames.CONVERT_EOL_CODES, false);

		prefs.setDefault(CommonEncodingPreferenceNames.INPUT_CODESET, ""); //$NON-NLS-1$

		String defaultEnc = CommonModelPreferenceNames.UTF_8;
		String systemEnc = System.getProperty("file.encoding");		 //$NON-NLS-1$
		if (systemEnc != null) {
			defaultEnc = CommonCharsetNames.getPreferredDefaultIanaName(systemEnc, CommonModelPreferenceNames.UTF_8);
		}
		prefs.setDefault(CommonEncodingPreferenceNames.OUTPUT_CODESET, defaultEnc);
		
		prefs.setDefault(CommonEncodingPreferenceNames.END_OF_LINE_CODE, ""); //$NON-NLS-1$
		prefs.setDefault(CommonModelPreferenceNames.TAB_WIDTH, CommonModelPreferenceNames.DEFAULT_TAB_WIDTH);

		prefs.setDefault(CommonModelPreferenceNames.FORMATTING_SUPPORTED, true);
		prefs.setDefault(CommonModelPreferenceNames.LINE_WIDTH, 72);
		prefs.setDefault(CommonModelPreferenceNames.SPLIT_MULTI_ATTRS, false);
		prefs.setDefault(CommonModelPreferenceNames.INDENT_USING_TABS, true);
		prefs.setDefault(CommonModelPreferenceNames.CLEAR_ALL_BLANK_LINES, false);

		prefs.setDefault(CommonModelPreferenceNames.PREFERRED_MARKUP_CASE_SUPPORTED, true);
		prefs.setDefault(CommonModelPreferenceNames.TAG_NAME_CASE, CommonModelPreferenceNames.UPPER);
		prefs.setDefault(CommonModelPreferenceNames.ATTR_NAME_CASE, CommonModelPreferenceNames.LOWER);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.core.runtime.Plugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		
		// JSPIndexManager depends on TaglibController, so TaglibController
		// should be started first
		TaglibController.startup();
		
		// add JSPIndexManager to keep JSP Index up to date
		// listening for IResourceChangeEvent.PRE_DELETE and IResourceChangeEvent.POST_CHANGE
		ResourcesPlugin.getWorkspace().addResourceChangeListener(JSPIndexManager.getInstance(), IResourceChangeEvent.POST_CHANGE);
		
		// https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=5091
		// makes sure IndexManager is aware of our indexes
		JSPIndexManager.getInstance().saveIndexes();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.core.runtime.Plugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		// stop listening
		ResourcesPlugin.getWorkspace().removeResourceChangeListener(JSPIndexManager.getInstance());
		// stop any searching/indexing
		JSPSearchSupport.getInstance().setCanceled(true);
		 
		TaglibController.shutdown();
		
		super.stop(context);
	}

	/**
	 * Returns the string from the plugin's resource bundle,
	 * or 'key' if not found.
	 */
	public static String getResourceString(String value) {
		String s = value.trim();
		if (!s.startsWith(KEY_PREFIX, 0))
			return s;
		if (s.startsWith(KEY_DOUBLE_PREFIX, 0))
			return s.substring(1);

		int ix = s.indexOf(' ');
		String key = ix == -1 ? s : s.substring(0, ix);

		ResourceBundle bundle = getDefault().getResourceBundle();
		try {
			return (bundle != null) ? bundle.getString(key.substring(1)) : key;
		} catch (MissingResourceException e) {
			return key;
		}
	}

	public static String getResourceString(String key, Object[] args) {

		try {
			return MessageFormat.format(getResourceString(key), args);
		} catch (IllegalArgumentException e) {
			return getResourceString(key);
		}

	}

	/**
	 * Returns the plugin's resource bundle,
	 */
	public ResourceBundle getResourceBundle() {
		try {
			if (resourceBundle == null)
				resourceBundle = ResourceBundle.getBundle("org.eclipse.jst.jsp.core.internal.JSPCorePluginResources");
		} catch (MissingResourceException x) {
			resourceBundle = null;
		}
		return resourceBundle;
	}
}