/* 
    * Copyright (C) 2016 Hobrasoft s.r.o.
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package cz.hobrasoft.pdfmu.operation.args;
  
  import java.util.logging.Logger;
  import net.sourceforge.argparse4j.inf.Argument;
  import net.sourceforge.argparse4j.inf.ArgumentParser;
  import net.sourceforge.argparse4j.inf.Namespace;
  import org.apache.commons.lang3.StringUtils;
  
  public class PasswordArgs implements ArgsConfiguration {
  
      private static final Logger logger = Logger.getLogger(PasswordArgs.class.getName());
  
      private final String title;
  
      public Argument passwordArgument;
      public Argument environmentVariableArgument;
  
      private String password;
  
      public PasswordArgs(String title) {
          assert title != null;
          this.title = title;
      }
  
      public String getPassword() {
          return password;
      }
  
      public char[] getPasswordCharArray() {
          if (password == null) {
              return null;
          }
          return password.toCharArray();
      }
  
      @Deprecated
      @Override
      public void addArguments(ArgumentParser parser) {
          finalizeArguments();
      }
  
      public void finalizeArguments() {
          assert passwordArgument != null;
          passwordArgument.type(String.class);
  
          assert environmentVariableArgument != null;
          environmentVariableArgument.type(String.class);
      }
  
      @Override
      public void setFromNamespace(Namespace namespace) {
          assert title != null;
          assert passwordArgument != null;
          password = namespace.getString(passwordArgument.getDest());
          if (password == null) {
              // Load the password from an environment variable
              assert environmentVariableArgument != null;
              String envVar = namespace.getString(environmentVariableArgument.getDest());
              assert envVar != null; // The argument has a default value
              logger.info(String.format("%s environment variable: %s", StringUtils.capitalize(title), envVar));
              password = System.getenv(envVar);
              if (password != null) {
                  logger.info(String.format("%s loaded from the environment variable %s.", StringUtils.capitalize(title), envVar));
              } else {
                  logger.info(String.format("%s was not set.", StringUtils.capitalize(title)));
              }
          } else {
              logger.info(String.format("%s loaded from the command line.", StringUtils.capitalize(title)));
          }
      }
  
  }