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

package org.xmlsh.builtin.commands;

import java.util.List;
import net.sf.saxon.s9api.XdmItem;
import org.xmlsh.core.BuiltinCommand;
import org.xmlsh.core.InputPort;
import org.xmlsh.core.InvalidArgumentException;
import org.xmlsh.core.Options;
import org.xmlsh.core.XValue;
import org.xmlsh.core.io.IXdmItemInputStream;
import org.xmlsh.core.io.StreamInputPort;
import org.xmlsh.sh.shell.SerializeOpts;

public class xread extends BuiltinCommand {

  /*
   * Read a XML from stdin and assign to variables
   * if -parse then open as a text
   */

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

    Options opts = new Options("p=port:,parse", SerializeOpts.getOptionDefs());
    opts.parse(args);

    args = opts.getRemainingArgs();
    setSerializeOpts(opts);

    boolean bParse = opts.hasOpt("parse");
    String port = opts.getOptString("port", null);

    if(args.size() != 1)
      throw new InvalidArgumentException("requires 1 argument");

    mShell.getEnv().unsetVar(args.get(0).toString());

    InputPort stdin = null;

    XdmItem item = null;
    if(port != null) {
      stdin = mShell.getEnv().getInputPort(port);
    }
    else
      stdin = mShell.getEnv().getStdin();

    if(bParse) {
      try (StreamInputPort ip = new StreamInputPort(
          stdin.asInputStream(getSerializeOpts()), stdin.getSystemId())) {
        item = ip.asXdmItem(getSerializeOpts());
      }
    }
    else {
      IXdmItemInputStream is = stdin.asXdmItemInputStream(getSerializeOpts());
      item = is.read();
    }
    if(item != null)
      mShell.getEnv().setVar(args.get(0).toString(), XValue.newXValue(item));

    return item == null ? 1 : 0;
  }
}

// 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.