/*******************************************************************************
 * Copyright (c) 2010-2013 Nokia Siemens Networks Oyj, Finland.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *      Nokia Siemens Networks - initial implementation
 *      Leo Hippelainen - Initial implementation
 *      Petri Tuononen - Initial implementation
 *******************************************************************************/
package org.eclipse.cdt.managedbuilder.llvm.ui;

import java.io.IOException;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;

import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle.
 * The main plugin class to be used in the desktop.
 *
 * @noextend This class is not intended to be subclassed by clients.
 */
public class LlvmUIPlugin extends AbstractUIPlugin {

	//The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.cdt.managedbuilder.llvm.ui"; //$NON-NLS-1$

	//The shared instance
	private static LlvmUIPlugin plugin;

	//Resource bundle
	private ResourceBundle resourceBundle;

	//Name for the properties file
	private final static String PROPERTIES = "plugin.properties"; //$NON-NLS-1$

	//Property Resource bundle
	private PropertyResourceBundle properties;

	/**
	 * Constructor.
	 */
	public LlvmUIPlugin() {
		super();
		plugin = this;
	}

	@Override
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
		//		LlvmEnvironmentVariableSupplier.initializePaths();
	}

	@Override
	public void stop(BundleContext context) throws Exception {
		super.stop(context);
		plugin = null;
		this.resourceBundle = null;
	}

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

	/**
	 * Returns the string from the plugin's resource bundle,
	 * or 'key' if not found.
	 */
	public static String getResourceString(String key) {
		ResourceBundle bundle = LlvmUIPlugin.getDefault().getResourceBundle();
		try {
			return (bundle != null) ? bundle.getString(key) : key;
		} catch (MissingResourceException e) {
			return key;
		}
	}

	/**
	 * Returns the plugin's resource bundle,
	 */
	public ResourceBundle getResourceBundle() {
		try {
			if (this.resourceBundle == null)
				this.resourceBundle = ResourceBundle.getBundle(this.getClass().getName() + "Resources"); //$NON-NLS-1$
		} catch (MissingResourceException x) {
			this.resourceBundle = null;
		}
		return this.resourceBundle;
	}

	/**
	 * Log error.
	 *
	 * @param e
	 */
	public void log(Throwable e) {
		log(new Status(IStatus.ERROR, PLUGIN_ID, IStatus.ERROR, "Error", e)); //$NON-NLS-1$
	}

	/**
	 * Log status.
	 *
	 * @param status
	 */
	public void log(IStatus status) {
		getLog().log(status);
	}

	/**
	 * Get plugin.properties
	 *
	 * @return PropertyResourceBundle
	 */
	public PropertyResourceBundle getProperties() {
		if (this.properties == null) {
			try {
				this.properties = new PropertyResourceBundle(
						FileLocator.openStream(this.getBundle(), new Path(PROPERTIES), false));
			} catch (IOException e) {
				//log error
				e.getMessage();
			}
		}
		return this.properties;
	}

	/**
	 * Get String from the plugin.properties file
	 *
	 * @param var Variable name wanted as a String e.g. "ToolName.assembler.llvm"
	 * @return String e.g. LLVM assembler
	 */
	public static String getPropertyString(String var) {
		PropertyResourceBundle properties = LlvmUIPlugin.getDefault().getProperties();
		return properties.getString(var);
	}

}