/*
    * 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.data.PrometheusDataValuesFormatter;
  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.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;
  
  /**
   * LoaderThread extension to create an XML backup.
   */
  public class PrometheusThreadCreateXMLFile
          implements TethysUIThread<Void> {
      /**
       * Buffer length.
       */
      private static final int BUFFER_LEN = 100;
  
      /**
       * Number 10.
       */
      private static final int TEN = 10;
  
      /**
       * File indicator.
       */
      private static final String SUFFIX_FILE = "XML";
  
      /**
       * Data Control.
       */
      private final PrometheusDataControl theControl;
  
      /**
       * Is this a Secure backup?
       */
      private final boolean isSecure;
  
      /**
       * Constructor (Event Thread).
       *
       * @param pControl data control
       * @param pSecure  is this a secure backup
       */
      public PrometheusThreadCreateXMLFile(final PrometheusDataControl pControl,
                                           final boolean pSecure) {
          isSecure = pSecure;
          theControl = pControl;
      }
  
      @Override
      public String getTaskName() {
          return isSecure
                  ? PrometheusThreadId.CREATEXML.toString()
                  : PrometheusThreadId.CREATEXTRACT.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;
  
          /* Catch Exceptions */
          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);
 
             /* Create the name of the file */
             final StringBuilder myName = new StringBuilder(BUFFER_LEN);
             myName.append(myBackupDir);
             myName.append(File.separator);
             myName.append(myPrefix);
             myName.append(SUFFIX_FILE);
 
             /* 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() + (isSecure
                     ? GordianUtilities.SECUREZIPFILE_EXT
                     : GordianUtilities.ZIPFILE_EXT));
 
             /* Access the data */
             final PrometheusDataSet myOldData = theControl.getData();
 
             /* Create a new formatter */
             final PrometheusDataValuesFormatter myFormatter = new PrometheusDataValuesFormatter(pManager, myPasswordMgr);
 
             /* Create backup */
             if (isSecure) {
                 myFormatter.createBackup(myOldData, myFile);
             } else {
                 myFormatter.createExtract(myOldData, myFile);
             }
 
             /* If this is a secure backup */
             if (isSecure) {
                 /* File created, so delete on error */
                 doDelete = true;
 
                 /* Check for cancellation */
 
                 /* Initialise the status window */
                 pManager.initTask("Reading Backup");
 
                 /* Load workbook */
                 final PrometheusDataSet myNewData = theControl.getNewData();
                 myFormatter.loadZipFile(myNewData, myFile);
 
                 /* Initialise the security, from the original data */
                 myNewData.initialiseSecurity(pManager, myOldData);
 
                 /* Initialise the status window */
                 pManager.initTask("Verifying Backup");
 
                 /* 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;
             }
 
         } finally {
             /* Try to delete the file if required */
             if (doDelete) {
                 MetisToolkit.cleanUpFile(myFile);
             }
         }
 
         /* Return nothing */
         return null;
     }
 }