/*******************************************************************************
    * Copyright (c) 2007, 2014 Massimiliano Ziccardi
    *
    * 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 it.jnrpe.server.console;
  
  import it.jnrpe.JNRPE;
  
  import java.io.IOException;
  import java.util.Map;
  
  import jline.console.ConsoleReader;
  
  public class HelpCommand extends ConsoleCommand {
  
  	public final static String NAME = "help";
  	private final Map<String, IConsoleCommand> commandMap;
  
  	public HelpCommand(ConsoleReader consoleReader, JNRPE jnrpe,
  			Map<String, IConsoleCommand> commands) {
  		super(consoleReader, jnrpe);
  		commandMap = commands;
  	}
  
  	public boolean execute(String[] args) throws Exception {
  		if (args == null || args.length == 0) {
  			getConsole().println("Available commands are : ");
  			for (IConsoleCommand command : commandMap.values()) {
  				// getConsole().println("  * \u001B[1m" + command.getName() +
  				// "\u001B[0m");
  				getConsole().println("  * " + highlight(command.getName()));
  			}
  
  			return false;
  		}
  		if (args.length != 1) {
  			getConsole().println(
  					"Only one parameter can be specified for the help command");
  			return false;
  		}
  
  		IConsoleCommand command = commandMap.get(args[0].toLowerCase());
  		if (command == null) {
  			getConsole().println("Unknown command : '" + args[0] + "'");
  			return false;
  		}
  
  		command.printHelp();
  
  		return false;
  	}
  
  	public String getName() {
  		return NAME;
  	}
  
  	public String getCommandLine() {
  		return "[COMMAND NAME]";
  	}
  
  	public void printHelp() throws IOException {
  		getConsole().println("Command Line: help " + getCommandLine());
  		getConsole().println(
  				"   Without parameters shows the list of available commands");
  		getConsole().println(
  				"   otherwise prints some help about the specified command");
  	}
  
  }