/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.accumulo.shell.commands;

import java.io.IOException;
import java.util.Map.Entry;

import org.apache.accumulo.core.client.AccumuloException;
import org.apache.accumulo.core.client.AccumuloSecurityException;
import org.apache.accumulo.core.client.NamespaceExistsException;
import org.apache.accumulo.core.client.NamespaceNotFoundException;
import org.apache.accumulo.core.client.TableExistsException;
import org.apache.accumulo.core.client.TableNotFoundException;
import org.apache.accumulo.core.conf.Property;
import org.apache.accumulo.shell.Shell;
import org.apache.accumulo.shell.Shell.Command;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;

public class CreateNamespaceCommand extends Command {
  private Option createNamespaceOptCopyConfig;

  @Override
  public int execute(final String fullCommand, final CommandLine cl, final Shell shellState) throws AccumuloException, AccumuloSecurityException,
      TableExistsException, TableNotFoundException, IOException, ClassNotFoundException, NamespaceExistsException, NamespaceNotFoundException {

    if (createNamespaceOptCopyConfig == null) {
      getOptions();
    }

    String namespace = cl.getArgs()[0];

    shellState.getConnector().namespaceOperations().create(namespace);

    // Copy options if flag was set
    Iterable<Entry<String,String>> configuration = null;
    if (cl.hasOption(createNamespaceOptCopyConfig.getOpt())) {
      String copy = cl.getOptionValue(createNamespaceOptCopyConfig.getOpt());
      if (shellState.getConnector().namespaceOperations().exists(namespace)) {
        configuration = shellState.getConnector().namespaceOperations().getProperties(copy);
      }
    }
    if (configuration != null) {
      for (Entry<String,String> entry : configuration) {
        if (Property.isValidTablePropertyKey(entry.getKey())) {
          shellState.getConnector().namespaceOperations().setProperty(namespace, entry.getKey(), entry.getValue());
        }
      }
    }

    return 0;
  }

  @Override
  public String description() {
    return "creates a new namespace";
  }

  @Override
  public String usage() {
    return getName() + " <namespaceName>";
  }

  @Override
  public Options getOptions() {
    final Options o = new Options();

    createNamespaceOptCopyConfig = new Option("cc", "copy-config", true, "namespace to copy configuration from");
    createNamespaceOptCopyConfig.setArgName("namespace");

    OptionGroup ogp = new OptionGroup();
    ogp.addOption(createNamespaceOptCopyConfig);

    o.addOptionGroup(ogp);

    return o;
  }

  @Override
  public int numArgs() {
    return 1;
  }
}