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/*
 * RED5 Open Source Media Server - https://github.com/Red5/
 * 
 * Copyright 2006-2016 by respective authors (see below). All rights reserved.
 * 
 * Licensed 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.red5.server;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Boot-straps Red5 using the latest available jars found in red5.home/lib directory.
 *
 * @author The Red5 Project
 * @author Paul Gregoire ([email protected])
 * @author Dominick Accattato ([email protected])
 */
public class Bootstrap {

    /**
     * BootStrapping entry point
     * 
     * @param args
     *            command line arguments
     * @throws Exception
     *             if error occurs
     */
    public static void main(String[] args) throws Exception {
        try {
            String root = getRed5Root();
            getConfigurationRoot(root);
            // bootstrap dependencies and start red5
            bootStrap();
            System.out.println("Bootstrap complete");
        } catch (Exception t) {
            System.out.println("Bootstrap exception:");
            t.printStackTrace();
            
        } finally {
            System.out.println("Bootstrap exit");
        }
    }

    /**
     * Loads classloader with dependencies
     * 
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws ClassNotFoundException
     * @throws NoSuchMethodException
     * @throws InvocationTargetException
     */
    private static void bootStrap() throws InstantiationException, IllegalAccessException, ClassNotFoundException, NoSuchMethodException, InvocationTargetException {
        // print the classpath
        // String classPath = System.getProperty("java.class.path");
        // System.out.printf("JVM classpath: %s\n", classPath);
        System.setProperty("red5.deployment.type", "bootstrap");
        System.setProperty("sun.lang.ClassLoader.allowArraySyntax", "true");
        // check system property before forcing out selector
        //if (System.getProperty("logback.ContextSelector") == null) {
            // set to use our logger
            //System.setProperty("logback.ContextSelector", "org.red5.logging.LoggingContextSelector");
        //}
        String policyFile = System.getProperty("java.security.policy");
        if (policyFile == null) {
            System.setProperty("java.security.debug", "all");
            System.setProperty("java.security.policy", String.format("%s/red5.policy", System.getProperty("red5.config_root")));
        }
        // set the temp directory if we're vista or later
        String os = System.getProperty("os.name").toLowerCase();
        // String arch = System.getProperty("os.arch").toLowerCase();
        // System.out.printf("OS: %s Arch: %s\n", os, arch);
      
        Object boot = Class.forName("org.red5.server.Launcher", true, ClassLoader.getSystemClassLoader()).getDeclaredConstructor().newInstance();
        Method m1 = boot.getClass().getMethod("launch", (Class[]) null);
        m1.invoke(boot, (Object[]) null);
        
    }

    /**
     * Gets the configuration root
     * 
     * @param root
     * @return
     */
    static String getConfigurationRoot(String root) {
        // look for config dir
        String conf = System.getProperty("red5.config_root");
        // if root is not null and conf is null then default it
        if (root != null && conf == null) {
            conf = root + "/conf";
        }
        // flip slashes only if windows based os
        if (File.separatorChar != '/') {
            conf = conf.replaceAll("\\\\", "/");
        }
        // set conf sysprop
        System.setProperty("red5.config_root", conf);
        System.out.printf("Configuation root: %s%n", conf);
        return conf;
    }

    /**
     * Gets the Red5 root
     * 
     * @return
     * @throws IOException
     */
    static String getRed5Root() throws IOException {
        // look for red5 root first as a system property
        String root = System.getProperty("red5.root");
        // if root is null check environmental
        if (root == null) {
            // check for env variable
            root = System.getenv("RED5_HOME");
        }
        // if root is null find out current directory and use it as root
        if (root == null || ".".equals(root)) {
            root = System.getProperty("user.dir");
            // System.out.printf("Current directory: %s%n", root);
        }
        // if were on a windows based os flip the slashes
        if (File.separatorChar != '/') {
            root = root.replaceAll("\\\\", "/");
        }
        // drop last slash if exists
        if (root.charAt(root.length() - 1) == '/') {
            root = root.substring(0, root.length() - 1);
        }
        // set/reset property
        System.setProperty("red5.root", root);
        System.out.printf("Root: %s%n", root);
        return root;
    }

}