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 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2016 by Pentaho : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * Licensed 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
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package org.pentaho.di.ui.job.entries.telnet;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.ShellAdapter;
import org.eclipse.swt.events.ShellEvent;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.pentaho.di.core.Const;
import org.pentaho.di.core.util.Utils;
import org.pentaho.di.i18n.BaseMessages;
import org.pentaho.di.job.JobMeta;
import org.pentaho.di.job.entries.telnet.JobEntryTelnet;
import org.pentaho.di.job.entry.JobEntryDialogInterface;
import org.pentaho.di.job.entry.JobEntryInterface;
import org.pentaho.di.repository.Repository;
import org.pentaho.di.ui.core.gui.WindowProperty;
import org.pentaho.di.ui.core.widget.TextVar;
import org.pentaho.di.ui.job.dialog.JobDialog;
import org.pentaho.di.ui.job.entry.JobEntryDialog;
import org.pentaho.di.ui.trans.step.BaseStepDialog;

/**
 * This dialog allows you to edit the Telnet job entry settings.
 *
 * @author Samatar
 * @since 19-06-2006
 */
public class JobEntryTelnetDialog extends JobEntryDialog implements JobEntryDialogInterface {
  private static Class<?> PKG = JobEntryTelnet.class; // for i18n purposes, needed by Translator2!!

  private Label wlName;

  private Text wName;

  private FormData fdlName, fdName;

  private Label wlHostname;

  private TextVar wHostname;

  private FormData fdlHostname, fdHostname;

  private Label wlTimeOut;
  private TextVar wTimeOut;
  private FormData fdlTimeOut, fdTimeOut;

  private Label wlPort;
  private TextVar wPort;
  private FormData fdPort, fdlPort;

  private Button wOK, wCancel;

  private Listener lsOK, lsCancel;

  private JobEntryTelnet jobEntry;

  private Shell shell;

  private SelectionAdapter lsDef;

  private boolean changed;

  public JobEntryTelnetDialog( Shell parent, JobEntryInterface jobEntryInt, Repository rep, JobMeta jobMeta ) {
    super( parent, jobEntryInt, rep, jobMeta );
    jobEntry = (JobEntryTelnet) jobEntryInt;
    if ( this.jobEntry.getName() == null ) {
      this.jobEntry.setName( BaseMessages.getString( PKG, "JobTelnet.Name.Default" ) );
    }
  }

  public JobEntryInterface open() {
    Shell parent = getParent();
    Display display = parent.getDisplay();

    shell = new Shell( parent, props.getJobsDialogStyle() );
    props.setLook( shell );
    JobDialog.setShellImage( shell, jobEntry );

    ModifyListener lsMod = new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        jobEntry.setChanged();
      }
    };
    changed = jobEntry.hasChanged();

    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = Const.FORM_MARGIN;
    formLayout.marginHeight = Const.FORM_MARGIN;

    shell.setLayout( formLayout );
    shell.setText( BaseMessages.getString( PKG, "JobTelnet.Title" ) );

    int middle = props.getMiddlePct();
    int margin = Const.MARGIN;

    // Filename line
    wlName = new Label( shell, SWT.RIGHT );
    wlName.setText( BaseMessages.getString( PKG, "JobTelnet.Name.Label" ) );
    props.setLook( wlName );
    fdlName = new FormData();
    fdlName.left = new FormAttachment( 0, 0 );
    fdlName.right = new FormAttachment( middle, -margin );
    fdlName.top = new FormAttachment( 0, margin );
    wlName.setLayoutData( fdlName );
    wName = new Text( shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wName );
    wName.addModifyListener( lsMod );
    fdName = new FormData();
    fdName.left = new FormAttachment( middle, 0 );
    fdName.top = new FormAttachment( 0, margin );
    fdName.right = new FormAttachment( 100, 0 );
    wName.setLayoutData( fdName );

    // hostname line
    wlHostname = new Label( shell, SWT.RIGHT );
    wlHostname.setText( BaseMessages.getString( PKG, "JobTelnet.Hostname.Label" ) );
    props.setLook( wlHostname );
    fdlHostname = new FormData();
    fdlHostname.left = new FormAttachment( 0, -margin );
    fdlHostname.top = new FormAttachment( wName, margin );
    fdlHostname.right = new FormAttachment( middle, -margin );
    wlHostname.setLayoutData( fdlHostname );

    wHostname = new TextVar( jobMeta, shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wHostname );
    wHostname.addModifyListener( lsMod );
    fdHostname = new FormData();
    fdHostname.left = new FormAttachment( middle, 0 );
    fdHostname.top = new FormAttachment( wName, margin );
    fdHostname.right = new FormAttachment( 100, 0 );
    wHostname.setLayoutData( fdHostname );

    // Whenever something changes, set the tooltip to the expanded version:
    wHostname.addModifyListener( new ModifyListener() {
      public void modifyText( ModifyEvent e ) {
        wHostname.setToolTipText( jobMeta.environmentSubstitute( wHostname.getText() ) );
      }
    } );

    wlPort = new Label( shell, SWT.RIGHT );
    wlPort.setText( BaseMessages.getString( PKG, "JobTelnet.Port.Label" ) );
    props.setLook( wlPort );
    fdlPort = new FormData();
    fdlPort.left = new FormAttachment( 0, -margin );
    fdlPort.right = new FormAttachment( middle, -margin );
    fdlPort.top = new FormAttachment( wHostname, margin );
    wlPort.setLayoutData( fdlPort );

    wPort = new TextVar( jobMeta, shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wPort );
    wPort.addModifyListener( lsMod );
    fdPort = new FormData();
    fdPort.left = new FormAttachment( middle, 0 );
    fdPort.top = new FormAttachment( wHostname, margin );
    fdPort.right = new FormAttachment( 100, 0 );
    wPort.setLayoutData( fdPort );

    wlTimeOut = new Label( shell, SWT.RIGHT );
    wlTimeOut.setText( BaseMessages.getString( PKG, "JobTelnet.TimeOut.Label" ) );
    props.setLook( wlTimeOut );
    fdlTimeOut = new FormData();
    fdlTimeOut.left = new FormAttachment( 0, -margin );
    fdlTimeOut.right = new FormAttachment( middle, -margin );
    fdlTimeOut.top = new FormAttachment( wPort, margin );
    wlTimeOut.setLayoutData( fdlTimeOut );

    wTimeOut = new TextVar( jobMeta, shell, SWT.SINGLE | SWT.LEFT | SWT.BORDER );
    props.setLook( wTimeOut );
    wTimeOut.addModifyListener( lsMod );
    fdTimeOut = new FormData();
    fdTimeOut.left = new FormAttachment( middle, 0 );
    fdTimeOut.top = new FormAttachment( wPort, margin );
    fdTimeOut.right = new FormAttachment( 100, 0 );
    wTimeOut.setLayoutData( fdTimeOut );

    wOK = new Button( shell, SWT.PUSH );
    wOK.setText( BaseMessages.getString( PKG, "System.Button.OK" ) );
    wCancel = new Button( shell, SWT.PUSH );
    wCancel.setText( BaseMessages.getString( PKG, "System.Button.Cancel" ) );

    BaseStepDialog.positionBottomButtons( shell, new Button[] { wOK, wCancel }, margin, wTimeOut );

    // Add listeners
    lsCancel = new Listener() {
      public void handleEvent( Event e ) {
        cancel();
      }
    };
    lsOK = new Listener() {
      public void handleEvent( Event e ) {
        ok();
      }
    };

    wCancel.addListener( SWT.Selection, lsCancel );
    wOK.addListener( SWT.Selection, lsOK );

    lsDef = new SelectionAdapter() {
      public void widgetDefaultSelected( SelectionEvent e ) {
        ok();
      }
    };

    wName.addSelectionListener( lsDef );
    wHostname.addSelectionListener( lsDef );

    // Detect X or ALT-F4 or something that kills this window...
    shell.addShellListener( new ShellAdapter() {
      public void shellClosed( ShellEvent e ) {
        cancel();
      }
    } );

    getData();
    BaseStepDialog.setSize( shell );

    shell.open();
    props.setDialogSize( shell, "JobTelnetDialogSize" );
    while ( !shell.isDisposed() ) {
      if ( !display.readAndDispatch() ) {
        display.sleep();
      }
    }
    return jobEntry;
  }

  public void dispose() {
    WindowProperty winprop = new WindowProperty( shell );
    props.setScreen( winprop );
    shell.dispose();
  }

  /**
   * Copy information from the meta-data input to the dialog fields.
   */
  public void getData() {
    wName.setText( Const.nullToEmpty( jobEntry.getName() ) );
    if ( jobEntry.getHostname() != null ) {
      wHostname.setText( jobEntry.getHostname() );
    }

    wPort.setText( Const.NVL( jobEntry.getPort(), String.valueOf( JobEntryTelnet.DEFAULT_PORT ) ) );
    wTimeOut.setText( Const.NVL( jobEntry.getTimeOut(), String.valueOf( JobEntryTelnet.DEFAULT_TIME_OUT ) ) );

    wName.selectAll();
    wName.setFocus();
  }

  private void cancel() {
    jobEntry.setChanged( changed );
    jobEntry = null;
    dispose();
  }

  private void ok() {
    if ( Utils.isEmpty( wName.getText() ) ) {
      MessageBox mb = new MessageBox( shell, SWT.OK | SWT.ICON_ERROR );
      mb.setText( BaseMessages.getString( PKG, "System.StepJobEntryNameMissing.Title" ) );
      mb.setMessage( BaseMessages.getString( PKG, "System.JobEntryNameMissing.Msg" ) );
      mb.open();
      return;
    }
    jobEntry.setName( wName.getText() );
    jobEntry.setHostname( wHostname.getText() );
    jobEntry.setPort( wPort.getText() );
    jobEntry.setTimeOut( wTimeOut.getText() );

    dispose();
  }

  public boolean evaluates() {
    return true;
  }

  public boolean isUnconditional() {
    return false;
  }

}
