/*
    * The Kuali Financial System, a comprehensive financial management system for higher education.
    * 
    * Copyright 2005-2014 The Kuali Foundation
    * 
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as
    * published by the Free Software Foundation, either version 3 of the
    * License, or (at your option) any later version.
   * 
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package org.kuali.kfs.module.external.kc.util;
  
  import java.text.MessageFormat;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.kfs.sys.KFSConstants;
  import org.kuali.kfs.sys.KFSKeyConstants;
  import org.kuali.kfs.sys.context.SpringContext;
  import org.kuali.rice.core.api.config.property.ConfigurationService;
  import org.kuali.rice.krad.util.ErrorMessage;
  import org.kuali.rice.krad.util.GlobalVariables;
  import org.kuali.rice.krad.util.MessageMap;
  
  /**
   * This class will help extract the error messages from GlobalVariables object and creates a list of string.
   */
  public class GlobalVariablesExtractHelper {
      private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(GlobalVariablesExtractHelper.class);
  
      /**
       * Extracts errors for error report writing.
       *
       * @return a list of error messages
       */
      public static void insertError(String message, String param) {
          MessageMap errorMap = GlobalVariables.getMessageMap();
          errorMap.putError(KFSConstants.GLOBAL_ERRORS, KFSKeyConstants.ERROR_CUSTOM, message + param);
      }
  
      public static List<String> extractGlobalVariableErrors() {
          List<String> result = new ArrayList<String>();
  
          MessageMap errorMap = GlobalVariables.getMessageMap();
  
          // Set<String> errorKeys = errorMap.keySet(); // deprecated
          Set<String> errorKeys = errorMap.getAllPropertiesWithErrors();
          List<ErrorMessage> errorMessages = null;
          Object[] messageParams;
          String errorKeyString;
          String errorString;
  
          for (String errorProperty : errorKeys) {
              // errorMessages = (List<ErrorMessage>) errorMap.get(errorProperty); // deprecated
              errorMessages = errorMap.getErrorMessagesForProperty(errorProperty);
              LOG.debug("error Messages :::: " + errorMessages.toString());
              for (ErrorMessage errorMessage : errorMessages) {
                  errorKeyString = SpringContext.getBean(ConfigurationService.class).getPropertyValueAsString(errorMessage.getErrorKey());
                  messageParams = errorMessage.getMessageParameters();
                  LOG.debug("message parameters:::  " + messageParams);
                  LOG.debug("errorKeyString :::: " + errorKeyString);
                  // MessageFormat.format only seems to replace one
                  // per pass, so I just keep beating on it until all are gone.
                  if (StringUtils.isBlank(errorKeyString)) {
                      errorString = errorMessage.getErrorKey();
                  }
                  else {
                      errorString = errorKeyString;
                  }
                  LOG.debug(errorString);
                  if (errorString.matches("^.*\\{\\d\\}.*$")) {
                      errorString = MessageFormat.format(errorString, messageParams);
                  }
                  result.add(errorString);
              }
          }
  
          // clear the stuff out of global vars, as we need to reformat it and put it back
          GlobalVariables.clear();
          return result;
      }
  
      public static String replaceTokens(String line, String ... replacements) {
          int i = 0;
          for (String err : replacements) {
              String repl = "{" + String.valueOf(i++) + "}";
              line = StringUtils.replaceOnce(line, repl, err);
          }
          return line;
     }
 
 }