/*
 * 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.settings.impl;

import java.io.PrintWriter;
import java.util.Dictionary;
import java.util.Hashtable;

import org.apache.sling.settings.SlingSettingsService;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceRegistration;

/**
 * This is a configuration printer for the web console which
 * prints out the sling settings.
 *
 */
public class SlingSettingsPrinter {

    private static ServiceRegistration pluginReg;

    public static void initPlugin(final BundleContext bundleContext,
            final SlingSettingsService service) {
        final SlingSettingsPrinter printer = new SlingSettingsPrinter(service);

        final Dictionary<String, String> props = new Hashtable<String, String>();
        props.put(Constants.SERVICE_DESCRIPTION,
            "Apache Sling Sling Settings Configuration Printer");
        props.put(Constants.SERVICE_VENDOR, "The Apache Software Foundation");
        props.put("felix.webconsole.label", "slingsettings");
        props.put("felix.webconsole.title", "Sling Settings");
        props.put("felix.webconsole.configprinter.modes", "always");

        pluginReg = bundleContext.registerService(SlingSettingsPrinter.class.getName(),
                printer,
                props);
    }

    public static void destroyPlugin() {
        if ( pluginReg != null) {
            pluginReg.unregister();
            pluginReg = null;
        }
    }

    private static String HEADLINE = "Apache Sling Settings";

    private final SlingSettingsService settings;

    public SlingSettingsPrinter(final SlingSettingsService settings) {
        this.settings = settings;
    }

    /**
     * Print out the servlet filter chains.
     * @see org.apache.felix.webconsole.ConfigurationPrinter#printConfiguration(java.io.PrintWriter)
     */
    public void printConfiguration(PrintWriter pw) {
        pw.println(HEADLINE);
        pw.println();
        pw.print("Sling ID = ");
        pw.print(this.settings.getSlingId());
        pw.println();
        pw.print("Sling Name = ");
        pw.print(this.settings.getSlingName());
        pw.println();
        pw.print("Sling Description = ");
        pw.print(this.settings.getSlingDescription());
        pw.println();
        pw.print("Sling Home = ");
        pw.print(this.settings.getSlingHomePath());
        pw.println();
        pw.print("Sling Home URL = ");
        pw.print(this.settings.getSlingHome());
        pw.println();
        pw.print("Run Modes = ");
        pw.print(this.settings.getRunModes());
        pw.println();
    }
}