/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.sling.commons.fsclassloader.impl;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.apache.sling.commons.fsclassloader.FSClassLoaderMBean;
import org.osgi.framework.BundleContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Implementation of the FSClassLoaderMBean interface
 */
public class FSClassLoaderMBeanImpl implements FSClassLoaderMBean {
	private final BundleContext context;
	private final FSClassLoaderProvider fsClassLoaderProvider;
	private static final Logger log = LoggerFactory.getLogger(FSClassLoaderMBeanImpl.class);

	public FSClassLoaderMBeanImpl(final FSClassLoaderProvider fsClassLoaderProvider, final BundleContext context) {
		this.fsClassLoaderProvider = fsClassLoaderProvider;
		this.context = context;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.sling.commons.fsclassloader.FSClassLoaderMBean#
	 * getCachedScriptCount()
	 */
	@Override
	public int getCachedScriptCount() throws IOException {
		return getScripts().size();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.sling.commons.fsclassloader.FSClassLoaderMBean#
	 * getCachedScripts()
	 */
	@Override
	public List<String> getCachedScripts() {
		List<String> scripts = new ArrayList<String>();
		scripts.addAll(getScripts());
		Collections.sort(scripts);
		return scripts;
	}

	private Collection<String> getScripts() {
		Collection<String> scripts = new HashSet<String>();
		try {
			Map<String, ScriptFiles> s = new LinkedHashMap<String, ScriptFiles>();
			File root = new File(context.getDataFile(""), "classes");
			if (root != null) {
				FSClassLoaderWebConsole.readFiles(root, root, s);
			}
			scripts = s.keySet();
		} catch (Exception e) {
			log.warn("Exception retrieving scripts from FSClassLoader", e);
		}
		return scripts;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.apache.sling.commons.fsclassloader.FSClassLoaderMBean#clearCache()
	 */
	@Override
	public void clearCache() {
		fsClassLoaderProvider.delete("");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.sling.commons.fsclassloader.FSClassLoaderMBean#
	 * getFSClassLoaderRoot()
	 */
	@Override
	public String getFSClassLoaderRoot() {
		return new File(context.getDataFile(""), "classes").getAbsolutePath();
	}

}