/*
 *
 *   Copyright (c) 1999 - 2011 my-Channels Ltd
 *   Copyright (c) 2012 - 2017 Software AG, Darmstadt, Germany and/or Software AG USA Inc., Reston, VA, USA, and/or its subsidiaries and/or its affiliates and/or their licensors.
 *
 *   Use, reproduction, transfer, publication or disclosure is prohibited except as specifically provided for in your License Agreement with Software AG.
 *
 */
package com.pcbsys.nirvana.apps;

import com.pcbsys.nirvana.client.*;

/**
 * Deletes a nirvana channel
 */
public class deleteChannel extends nSampleApp {

  private static deleteChannel mySelf = null;

  /**
   * This method demonstrates the Nirvana API calls necessary to delete a
   * channel. It is called after all command line arguments have been received
   * and validated
   *
   * @param realmDetails a String[] containing the possible RNAME values
   * @param channelName the channel name to delete
   */
  private void doit(String[] realmDetails, String channelName) {

    mySelf.constructSession(realmDetails);

    // Deletes the specified channel
    try {
      // Create a channel attributes object
      nChannelAttributes nca = new nChannelAttributes();
      nca.setName(channelName);

      // Delete the channel

      mySession.deleteChannel(nca);
      System.out.println("Deleting " + channelName);

    }
    // Handle errors
    catch (nChannelNotFoundException cnfe) {

      try {
        nChannelAttributes[] chanAts = mySession.getChannels(channelName);
        if (chanAts.length != 0) {
          System.out.println(channelName
              + " is a folder, do you wish to delete all channels within this folder and it's subfolders? y/n");
          char c = (char) System.in.read();
          if (c == 'y') {
            for (nChannelAttributes x : chanAts) {
              System.out.println("Deleting " + x.getName());
              mySession.deleteChannel(x);
            }

          }

        }

      } catch (Exception e) {
        e.printStackTrace();
        System.exit(1);
      }
    } catch (nSecurityException se) {
      System.out.println("Insufficient permissions for the requested operation.");
      System.out.println("Please check the ACL settings on the server.");
      se.printStackTrace();
      System.exit(1);
    } catch (nSessionNotConnectedException snce) {
      System.out.println("The session object used is not physically connected to the Nirvana realm.");
      System.out.println("Please ensure the realm is up and check your RNAME value.");
      snce.printStackTrace();
      System.exit(1);
    } catch (nUnexpectedResponseException ure) {
      System.out.println("The Nirvana REALM has returned an unexpected response.");
      System.out.println("Please ensure the Nirvana REALM and client API used are compatible.");
      ure.printStackTrace();
      System.exit(1);
    } catch (nUnknownRemoteRealmException urre) {
      System.out.println("The channel specified resided in a remote realm which could not be found.");
      System.out.println("Please ensure the channel name specified is correct.");
      urre.printStackTrace();
      System.exit(1);
    } catch (nRequestTimedOutException rtoe) {
      System.out.println("The requested operation has timed out waiting for a response from the REALM.");
      System.out.println("If this is a very busy REALM ask your administrator to increase the client timeout values.");
      rtoe.printStackTrace();
      System.exit(1);
    } catch (nBaseClientException nbce) {
      System.out.println("An error occured while creating the Channel Attributes object.");
      nbce.printStackTrace();
      System.exit(1);
    }
    // Close the session we opened
    try {
      nSessionFactory.close(mySession);
    } catch (Exception ex) {
    }

    // Close any other sessions within this JVM so that we can exit
    nSessionFactory.shutdown();
  }

  protected void processArgs(String[] args) {
    switch (args.length) {
      case 1:
        if (args[0].equals("-?")) {
          Usage();
          UsageEnv();
        }
        System.getProperties().put("CHANNAME", args[0]);
        break;
    }
  }

  public static void main(String[] args) {

    // Create an instance for this class
    mySelf = new deleteChannel();

    // Process command line arguments
    mySelf.processArgs(args);

    // Process Environment Variables
    nSampleApp.processEnvironmentVariables();

    // Check the channel name specified
    String channelName = null;
    if (System.getProperty("CHANNAME") != null) {
      channelName = System.getProperty("CHANNAME");
    } else {
      Usage();
      System.exit(1);
    }

    // Check the local realm details
    String RNAME = null;
    if (System.getProperty("RNAME") != null) {
      RNAME = System.getProperty("RNAME");
    } else {
      Usage();
      System.exit(1);
    }

    // Process the local REALM RNAME details
    String[] rproperties = new String[4];
    rproperties = parseRealmProperties(RNAME);

    // delete the channel specified
    mySelf.doit(rproperties, channelName);
  }

  /**
   * Prints the usage message for this class
   */
  private static void Usage() {

    System.out.println("Usage ...\n");
    System.out.println("ndelchan <channel name>  \n");

    System.out.println("<Required Arguments> \n");
    System.out.println("<channel name> - Channel name parameter for the channel to delete");

    System.out.println("\n\nNote: -? provides help on environment variables \n");
  }

} // End of deleteChannel Class