/*
 * Copyright (c) 2003, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.console;

import java.io.*;
import java.util.*;


//  ********************     BundleDependentsCommand     ********************
/**
 * 
 *
 * @author Jan Stein
 * @version $Revision: 1.1.1.1 $
 */
class Alias extends Hashtable {
  
  public String getString(String key) {
    String [] a = (String [])get(key);
    if (a != null) {
      StringBuffer sb = new StringBuffer();
      sb.append(a[0]);
      for (int i = 1; i < a.length; i++) {
	sb.append(" ");
	sb.append(a[i]);
      }
      return sb.toString();
    }
    return null;
  }


  void save(OutputStream out) {
    try {
      Properties props = new Properties();
      for (Enumeration e = keys(); e.hasMoreElements(); ) {
	String   k = (String) e.nextElement();
	String[] a = (String[])get(k);
	
	StringBuffer sb = new StringBuffer();
	
	for (int i = 0; i < a.length; i++) {
	  sb.append(a[i].trim());
	  if(i < a.length - 1) {
	    sb.append(" ");
	  }
	}
	props.put(k.trim(), sb.toString());
      }
      props.save(out, "aliases");
    } finally {
      try {out.close(); } catch (Exception ignored) { }
    }
  }

  void restore(InputStream in) throws IOException {
    try {
      Properties props = new Properties();
      props.load(in);
      for (Enumeration e = props.keys(); e.hasMoreElements(); ) {
	String   k    = (String)e.nextElement();
	String   args = (String)props.get(k);
	
	StringTokenizer st = new StringTokenizer(args," ");
	String[] a         = new String[st.countTokens()];
	for (int i = 0; i < a.length; i++) {
	  a[i] = st.nextToken();
	}
	put(k, a);
      }
    } finally {
      try { in.close(); } catch (Exception ignored) { }
    }
  }

  void cgalias(String group, String [] cmds) {
    for (int i = 0; i < cmds.length; i++) {
      put(cmds[i], new String [] { group, cmds[i] });
    }
  }

  void setDefault() {
    clear();

    cgalias("/session", new String [] {
      "alias", "echo", "enter", "leave", "help",
      "prompt", "quit", "source", "unalias", "save", "restore",
    });

    String aliasFile = System.getProperty("org.knopflerfish.console.alias.file");
    if(aliasFile != null && !"".equals(aliasFile)) {
      File file = new File(aliasFile);
      if(file.exists()) {
	try {
	  restore(new FileInputStream(aliasFile));
	} catch (Exception e) {
	  System.err.println("Failed to restore aliases from " + aliasFile);
	}
	return;
      }  else {
	System.out.println("default alias file " + file.getAbsolutePath() + 
			   " does not exists, using internal defaults");
      }
    }
    
    cgalias("/framework", new String [] {
      "bundles", 
      "install", 
      "start", 
      "stop", 
      "update", 
      "refresh",
      "services",
      "startlevel",
      "shutdown",
    });
    // shortcuts
    put("fw", new String [] { "/session", "enter", "framework" });
    
    // backward compability
    put("log",     new String [] { "/log", "show" });
    put("lsb",     new String [] { "/framework", "bundles", "-i" });
    put("lss",     new String [] { "/framework", "services" });
    
    // Oscar compatability
    put("exports", new String [] { "/framework", "package", "-b" });
    put("ps",      new String [] { "/framework", "bundles", "-i" });
    put("cd",      new String [] { "/framework", "cd" });
    
    // JES compatability
    put("manifest", new String [] { "/framework", "headers" });
  }
}