/*
 * 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
 *
 *   https://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.util.Iterator;
import java.util.Set;

import org.apache.accumulo.core.clientImpl.Namespace;
import org.apache.accumulo.core.util.Pair;
import org.apache.accumulo.core.util.tables.TableNameUtil;
import org.apache.accumulo.shell.Shell;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;

public class DeleteTableCommand extends TableOperation {

  private Option forceOpt;

  @Override
  public int execute(final String fullCommand, final CommandLine cl, final Shell shellState)
      throws Exception {
    if (cl.hasOption(forceOpt.getOpt())) {
      super.force();
    } else {
      super.noForce();
    }
    return super.execute(fullCommand, cl, shellState);
  }

  @Override
  public String description() {
    return "deletes a table (Same as droptable)";
  }

  @Override
  protected void doTableOp(final Shell shellState, final String tableName) throws Exception {
    shellState.getAccumuloClient().tableOperations().delete(tableName);
    shellState.getWriter().println("Table: [" + tableName + "] has been deleted.");

    if (shellState.getTableName().equals(tableName)) {
      shellState.setTableName("");
    }
  }

  @Override
  public Options getOptions() {
    forceOpt = new Option("f", "force", false, "force deletion without prompting");
    final Options opts = super.getOptions();

    opts.addOption(forceOpt);
    return opts;
  }

  @Override
  protected void pruneTables(Set<String> tables) {
    Iterator<String> tableNames = tables.iterator();
    while (tableNames.hasNext()) {
      String table = tableNames.next();
      Pair<String,String> qualifiedName = TableNameUtil.qualify(table);
      if (Namespace.ACCUMULO.name().equals(qualifiedName.getFirst())) {
        Shell.log.trace("Removing table from deletion set: {}", table);
        tableNames.remove();
      }
    }
  }
}
