package org.kuali.ole.docstore.utility;
   
   import java.io.File;
   import java.io.IOException;
   import java.net.URISyntaxException;
   import java.text.SimpleDateFormat;
   import java.util.Date;
   
   import org.apache.commons.io.FileUtils;
  import org.apache.commons.lang.StringUtils;
  import org.kuali.ole.docstore.discovery.service.IndexerService;
  import org.kuali.ole.docstore.discovery.util.DiscoveryEnvUtil;
  import org.kuali.ole.docstore.util.DocStoreEnvUtil;
  import org.kuali.ole.repository.DeleteManager;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * 
   */
  public class DocumentStoreMaintenance {
      DeleteManager deleteManager = new DeleteManager();
      IndexerService indexerService = null;
      DocStoreEnvUtil docStoreEnvUtil = new DocStoreEnvUtil();
      DiscoveryEnvUtil discoveryEnvUtil = new DiscoveryEnvUtil();
      private static Logger logger = LoggerFactory.getLogger(DocumentStoreMaintenance.class);
      private static final String PREPARE_FOR_NEW_BUILD = "prepareForNewBuild";
      private static final String CLEANUP_DATA = "cleanupData";
      private static final String RESET_DOCSTORE = "resetDocstore";
  
      /**
       * Used to rename the folder / file with the current timestamp.
       * 
       * @param filePath
       * @param timeStamp
       */
      private void renameFolder(String filePath, String timeStamp) {
          File srcFile = new File(filePath);
          File destFile = new File(filePath + "-" + timeStamp);
          boolean success = srcFile.renameTo(destFile);
          if (success) {
              logger.info("Renamed " + filePath + " as " + destFile.getAbsolutePath());
          } else {
              logger.info("Failed to rename " + filePath + " as " + destFile.getAbsolutePath());
          }
  
      }
  
      /**
       * Used to rename the %ole.docstore.home/repository folder with the current timestamp.
       * 
       * @param timeStamp
       */
      private void deleteDocStoreData(String timeStamp) {
          String docStoreDataFolder = docStoreEnvUtil.getJackrabbitFolderPath();
          renameFolder(docStoreDataFolder, timeStamp);
      }
  
      /**
       * Used to rename the %ole.discovery.home%/solr-data folder with the current timestamp.
       * 
       * @param timeStamp
       */
      private void deleteDiscoveryData(String timeStamp) {
          String discoveryDateFilePath = discoveryEnvUtil.getSolrDataFolderPath();
          renameFolder(discoveryDateFilePath, timeStamp);
      }
  
      /**
       * Used to rename the %ole.docstore.home/Properties folder with the current timestamp.
       * 
       * @param timeStamp
       */
      private void deleteDocstoreProperties(String timeStamp) {
          String docStorePropertiesFilePath = docStoreEnvUtil.getDocStorePropertiesFolderPath();
          renameFolder(docStorePropertiesFilePath, timeStamp);
      }
  
      /**
       * Used to rename the %ole.discovery.home%/solr-config folder with the current timestamp.
       * 
       * @param timeStamp
       */
      private void deleteDiscoveryConfig(String timeStamp) {
          String discoceryConfigFilePath = discoveryEnvUtil.getSolrConfigFolderPath();
          renameFolder(discoceryConfigFilePath, timeStamp);
      }
  
      /**
       * Used to rename the %ole.docstore.home folder with the current timestamp.
       * 
       * @param timeStamp
       */
      private void deleteDocstore(String timeStamp) {
          String docStoreRootFilePath = docStoreEnvUtil.getRootFolderPath();
          renameFolder(docStoreRootFilePath, timeStamp);
      }
  
      /**
      * Used to rename the %ole.discovery.home folder with the current timestamp.
      * 
      * @param timeStamp
      */
     private void deleteDiscovery(String timeStamp) {
         String discoveryRootFilePath = discoveryEnvUtil.getRootFolderPath();
         renameFolder(discoveryRootFilePath, timeStamp);
     }
 
     /**
      * This method will execute if the argument is prepareForNewBuild in the maintenance.command file. In this process
      * %ole.docstore.home%/properties and %ole.discovery.home/solr-config will renamed with the current timestamp at the time of
      * initialization.
      * 
      * @param timeStamp
      */
 
     private void prepareForNewBuild(String timeStamp) {
         deleteDocstoreProperties(timeStamp);
         deleteDiscoveryConfig(timeStamp);
 
     }
 
     /**
      * This method will execute if the argument is resetDocStore in the maintenance.command file. In this process
      * %ole.docstore.home%,%ole.docstore.home%/jackrabbit,%ole.discovery.home and %ole.discovery.home/solr-data will renamed with the
      * current timestamp at the time of initialization.
      * 
      * @param timeStamp
      */
     private void resetDocStore(String timeStamp) {
         deleteDocStoreData(timeStamp);
         deleteDiscoveryData(timeStamp);
         deleteDiscovery(timeStamp);
         deleteDocstore(timeStamp);
 
     }
 
     /**
      * This method is called at the time of docstore initialization and operations are performed based on the command mentioned in
      * maintenance.command file
      * 
      * @param docStoreHome
      * @param discoveryHome
      * @throws IOException
      * @throws URISyntaxException
      */
     public void docStoreMaintenance(String docStoreHome, String discoveryHome) throws IOException {
         docStoreEnvUtil.initPathValues(docStoreHome);
         discoveryEnvUtil.initPathValues(discoveryHome);
         String timeStamp = new SimpleDateFormat("yyyyMMdd-HHmmss").format(new Date());
         String maintenanceFilePath = null;
         String maintenanceFileName = null;
         File maintenanceFile = null;
         File folder = new File(docStoreHome);
         File[] listOfFiles = folder.listFiles();
         String maintenanceAction = null;
         if (listOfFiles != null) {
             for (int i = 0; i < listOfFiles.length; i++) {
                 if (listOfFiles[i].isFile()) {
                     maintenanceFileName = listOfFiles[i].getName();
                     if (maintenanceFileName.equalsIgnoreCase("maintenance.command")) {
                         maintenanceFilePath = listOfFiles[i].getAbsolutePath();
                         maintenanceFile = new File(maintenanceFilePath);
                         maintenanceAction = FileUtils.readFileToString(maintenanceFile);
                         logger.info("maintenanceAction-->" + maintenanceAction);
                         break;
                     }
                 }
             }
         }
 
         if (!StringUtils.isBlank(maintenanceAction)) {
             if (maintenanceAction.equalsIgnoreCase(PREPARE_FOR_NEW_BUILD)) {
                 prepareForNewBuild(timeStamp);
 
             } else if (maintenanceAction.equalsIgnoreCase(CLEANUP_DATA)) {
                 // cleanupData();
             } else if (maintenanceAction.equalsIgnoreCase(RESET_DOCSTORE)) {
                 resetDocStore(timeStamp);
             }
             if (maintenanceFile != null) {
                 maintenanceFile.delete();
             }
 
         }
     }
 }