/**
 * $Id$
 * $Date$
 *
 */

package org.xmlsh.builtin.commands;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import javax.xml.stream.XMLStreamWriter;
import org.xmlsh.core.BuiltinCommand;
import org.xmlsh.core.InvalidArgumentException;
import org.xmlsh.core.Options;
import org.xmlsh.core.XEnvironment;
import org.xmlsh.core.XValue;
import org.xmlsh.core.XVariable;
import org.xmlsh.core.io.OutputPort;
import org.xmlsh.sh.shell.SerializeOpts;
import org.xmlsh.sh.shell.ShellOpts;
import org.xmlsh.util.Util;

public class set extends BuiltinCommand {

  static final String sDocRoot = "env";

  @Override
  public int run(List<XValue> args) throws Exception {

    if(args == null || args.size() == 0) {
      printVars();
      return 0;
    }

    Options opts = new Options(ShellOpts.SHELL_OPTS,
        SerializeOpts.getOptionDefs());
    opts.parse(args);
    setSerializeOpts(opts);
    setShellOptions(opts);

    args = opts.getRemainingArgs();
    // Only set args here if there are any left
    // could be set +x which would clear $*
    if(args != null && (args.size() > 0)) {
      mShell.setArgs(args);

    }
    return 0;
  }

  private void setShellOptions(Options opts) throws InvalidArgumentException {
    mShell.setOptions(opts);
  }

  private void printVars() throws Exception {

    XEnvironment env = mShell.getEnv();

    OutputPort stdout = env.getStdout();
    XMLStreamWriter writer = stdout
        .asXMLStreamWriter(mShell.getSerializeOpts());

    writer.writeStartDocument();
    writer.writeStartElement(sDocRoot);

    Collection<String> names = env.getVarNames();
    String[] anames = names.toArray(new String[names.size()]);
    Arrays.sort(anames);

    for(String name : anames) {
      XVariable var = env.getVar(name);
      var.serialize(writer);

    }
    writer.writeEndElement();
    writer.writeEndDocument();

    writer.close();
    stdout.writeSequenceTerminator(getSerializeOpts());

  }
}
//
//
// Copyright (C) 2008-2014 David A. Lee.
//
// The contents of this file are subject to the "Simplified BSD License" (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.opensource.org/licenses/bsd-license.php
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is David A. Lee
//
// Portions created by (your name) are Copyright (C) (your legal entity). All
// Rights Reserved.
//
// Contributor(s): none.
//