/*
    * Prometheus: Application Framework
    * Copyright 2012-2026. Tony Washer
    *
    * 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 limitations under
   * the License.
   */
  package io.github.tonywasher.joceanus.prometheus.threads;
  
  import io.github.tonywasher.joceanus.gordianknot.util.GordianUtilities;
  import io.github.tonywasher.joceanus.metis.preference.MetisPreferenceManager;
  import io.github.tonywasher.joceanus.metis.toolkit.MetisToolkit;
  import io.github.tonywasher.joceanus.oceanus.base.OceanusException;
  import io.github.tonywasher.joceanus.oceanus.date.OceanusDate;
  import io.github.tonywasher.joceanus.prometheus.data.PrometheusDataSet;
  import io.github.tonywasher.joceanus.prometheus.exc.PrometheusDataException;
  import io.github.tonywasher.joceanus.prometheus.preference.PrometheusBackup.PrometheusBackupPreferenceKey;
  import io.github.tonywasher.joceanus.prometheus.preference.PrometheusBackup.PrometheusBackupPreferences;
  import io.github.tonywasher.joceanus.prometheus.security.PrometheusSecurityPasswordManager;
  import io.github.tonywasher.joceanus.prometheus.service.sheet.PrometheusSheetWorkBookType;
  import io.github.tonywasher.joceanus.prometheus.sheets.PrometheusSpreadSheet;
  import io.github.tonywasher.joceanus.prometheus.toolkit.PrometheusToolkit;
  import io.github.tonywasher.joceanus.prometheus.views.PrometheusDataControl;
  import io.github.tonywasher.joceanus.tethys.api.thread.TethysUIThread;
  import io.github.tonywasher.joceanus.tethys.api.thread.TethysUIThreadManager;
  
  import java.io.File;
  
  /**
   * Thread to create an encrypted backup of a data set.
   *
   * @author Tony Washer
   */
  public class PrometheusThreadCreateBackup
          implements TethysUIThread<Void> {
      /**
       * Buffer length.
       */
      private static final int BUFFER_LEN = 100;
  
      /**
       * Number 10.
       */
      private static final int TEN = 10;
  
      /**
       * Data Control.
       */
      private final PrometheusDataControl theControl;
  
      /**
       * Constructor (Event Thread).
       *
       * @param pControl data control
       */
      public PrometheusThreadCreateBackup(final PrometheusDataControl pControl) {
          theControl = pControl;
      }
  
      @Override
      public String getTaskName() {
          return PrometheusThreadId.CREATEBACKUP.toString();
      }
  
      @Override
      public Void performTask(final TethysUIThreadManager pManager) throws OceanusException {
          /* Access the thread manager */
          final PrometheusToolkit myPromToolkit = (PrometheusToolkit) pManager.getThreadData();
          final PrometheusSecurityPasswordManager myPasswordMgr = myPromToolkit.getPasswordManager();
          boolean doDelete = false;
          File myFile = null;
  
          try {
              /* Initialise the status window */
              pManager.initTask(getTaskName());
  
              /* Access the Backup preferences */
              final MetisPreferenceManager myMgr = theControl.getPreferenceManager();
              final PrometheusBackupPreferences myProperties = myMgr.getPreferenceSet(PrometheusBackupPreferences.class);
  
              /* Determine the archive name */
              final String myBackupDir = myProperties.getStringValue(PrometheusBackupPreferenceKey.BACKUPDIR);
              final String myPrefix = myProperties.getStringValue(PrometheusBackupPreferenceKey.BACKUPPFIX);
              final boolean doTimeStamp = myProperties.getBooleanValue(PrometheusBackupPreferenceKey.BACKUPTIME);
              final PrometheusSheetWorkBookType myType = myProperties.getEnumValue(PrometheusBackupPreferenceKey.BACKUPTYPE, PrometheusSheetWorkBookType.class);
  
              /* Create the name of the file */
              final StringBuilder myName = new StringBuilder(BUFFER_LEN);
              myName.append(myBackupDir);
              myName.append(File.separator);
             myName.append(myPrefix);
 
             /* If we are doing time-stamps */
             if (doTimeStamp) {
                 /* Obtain the current date/time */
                 final OceanusDate myNow = new OceanusDate();
 
                 myName.append(myNow.getYear());
                 if (myNow.getMonth() < TEN) {
                     myName.append('0');
                 }
                 myName.append(myNow.getMonth());
                 if (myNow.getDay() < TEN) {
                     myName.append('0');
                 }
                 myName.append(myNow.getDay());
             }
 
             /* Set the standard backup name */
             myFile = new File(myName.toString() + GordianUtilities.SECUREZIPFILE_EXT);
 
             /* Create backup */
             final PrometheusSpreadSheet mySheet = theControl.getSpreadSheet();
             final PrometheusDataSet myOldData = theControl.getData();
             mySheet.createBackup(pManager, myOldData, myFile, myType);
 
             /* File created, so delete on error */
             doDelete = true;
 
             /* Initialise the status window */
             pManager.initTask("Verifying Backup");
 
             /* Load workbook */
             final PrometheusDataSet myNewData = theControl.getNewData();
             mySheet.loadBackup(pManager, myPasswordMgr, myNewData, myFile);
 
             /* Create a difference set between the two data copies */
             final PrometheusDataSet myDiff = myNewData.getDifferenceSet(pManager, myOldData);
 
             /* If the difference set is non-empty */
             if (!myDiff.isEmpty()) {
                 /* Throw an exception */
                 throw new PrometheusDataException(myDiff, "Backup is inconsistent");
             }
 
             /* OK so switch off flag */
             doDelete = false;
 
             /* State that we have completed */
             pManager.setCompletion();
 
             /* Delete file on error */
         } finally {
             /* Try to delete the file if required */
             if (doDelete) {
                 MetisToolkit.cleanUpFile(myFile);
             }
         }
 
         /* Return nothing */
         return null;
     }
 }