/**
    * Copyright 2005-2014 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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 org.kuali.rice.krad.config;
  
  import org.kuali.rice.core.api.config.module.RunMode;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;
  import org.kuali.rice.core.framework.config.module.ModuleConfigurer;
  import org.kuali.rice.krad.service.DataDictionaryService;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.springframework.context.ApplicationEvent;
  import org.springframework.context.ApplicationListener;
  import org.springframework.context.event.ContextRefreshedEvent;
  import org.springframework.context.event.SmartApplicationListener;
  
  import javax.sql.DataSource;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.concurrent.Executors;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Rice module configurer for KRAD
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class KRADConfigurer extends ModuleConfigurer implements SmartApplicationListener {
  
      private DataSource applicationDataSource;
  
      private boolean includeKnsSpringBeans;
  
      private static final String KRAD_SPRING_BEANS_PATH = "classpath:org/kuali/rice/krad/config/KRADSpringBeans.xml";
      private static final String KNS_SPRING_BEANS_PATH = "classpath:org/kuali/rice/kns/config/KNSSpringBeans.xml";
  
      public KRADConfigurer() {
          // TODO really the constant value should be "krad" but there's some work to do in order to make
          // that really work, see KULRICE-6532
          super(KRADConstants.KR_MODULE_NAME);
          setValidRunModes(Arrays.asList(RunMode.LOCAL));
          setIncludeKnsSpringBeans(true);
      }
  
      @Override
      public void addAdditonalToConfig() {
          // export the state of KNS enablement to the global config
          ConfigContext.getCurrentContextConfig().putProperty(KRADConstants.Config.KNS_ENABLED, Boolean.valueOf(isIncludeKnsSpringBeans()).toString());
          configureDataSource();
      }
  
      @Override
      public List<String> getPrimarySpringFiles() {
          LOG.info("KRADConfigurer:getPrimarySpringFiles: getRunMode => " + getRunMode());
          final List<String> springFileLocations = new ArrayList<String>();
          springFileLocations.add(KRAD_SPRING_BEANS_PATH);
  
          if (isIncludeKnsSpringBeans()) {
              springFileLocations.add(KNS_SPRING_BEANS_PATH);
          }
  
          return springFileLocations;
      }
  
      @Override
      public void onApplicationEvent(ApplicationEvent applicationEvent) {
          if (applicationEvent instanceof ContextRefreshedEvent) {
              loadDataDictionary();
              publishDataDictionaryComponents();
          }
      }
  
      @Override
      public boolean supportsEventType(Class<? extends ApplicationEvent> aClass) {
          return true;
      }
  
      @Override
      public boolean supportsSourceType(Class<?> aClass) {
          return true;
      }
  
      @Override
      public int getOrder() {
         // return a lower value which will give the data dictionary indexing higher precedence since DD indexing should
         // be started as soon as it can be
         return -1000;
     }
 
     /**
      * Used to "poke" the Data Dictionary again after the Spring Context is initialized.  This is to
      * allow for modules loaded with KualiModule after the KNS has already been initialized to work.
      *
      * Also initializes the DateTimeService
      */
     protected void loadDataDictionary() {
         if (isLoadDataDictionary()) {
             LOG.info("KRAD Configurer - Loading DD");
             DataDictionaryService dds = KRADServiceLocatorWeb.getDataDictionaryService();
             if (dds == null) {
                 dds = (DataDictionaryService) GlobalResourceLoader.getService(
                         KRADServiceLocatorWeb.DATA_DICTIONARY_SERVICE);
             }
             dds.getDataDictionary().parseDataDictionaryConfigurationFiles(false);
 
             if (isValidateDataDictionary()) {
                 LOG.info("KRAD Configurer - Validating DD");
                 dds.getDataDictionary().validateDD(isValidateDataDictionaryEboReferences());
             }
 
             // KULRICE-4513 After the Data Dictionary is loaded and validated, perform Data Dictionary bean overrides.
             dds.getDataDictionary().performBeanOverrides();
         }
     }
 
     protected void publishDataDictionaryComponents() {
         if (isComponentPublishingEnabled()) {
             long delay = getComponentPublishingDelay();
             LOG.info("Publishing of Data Dictionary components is enabled, scheduling publish after " + delay + " millisecond delay");
             ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
             try {
                 scheduler.schedule(new Runnable() {
                     @Override
                     public void run() {
                         long start = System.currentTimeMillis();
                         LOG.info("Executing scheduled Data Dictionary component publishing...");
                         try {
                             KRADServiceLocatorWeb.getDataDictionaryComponentPublisherService().publishAllComponents();
                         } catch (RuntimeException e) {
                             LOG.error("Failed to publish data dictionary components.", e);
                             throw e;
                         } finally {
                             long end = System.currentTimeMillis();
                             LOG.info("... finished scheduled execution of Data Dictionary component publishing.  Took " + (end-start) + " milliseconds");
                         }
                     }
                 }, delay, TimeUnit.MILLISECONDS);
             } finally {
                 scheduler.shutdown();
             }
         }
     }
 
     @Override
     public boolean hasWebInterface() {
         return true;
     }
 
     /**
      * Returns true - KNS UI should always be included.
      *
      * @see org.kuali.rice.core.framework.config.module.ModuleConfigurer#shouldRenderWebInterface()
      */
     @Override
     public boolean shouldRenderWebInterface() {
         return true;
     }
 
     public boolean isLoadDataDictionary() {
         return ConfigContext.getCurrentContextConfig().getBooleanProperty("load.data.dictionary", true);
     }
 
     public boolean isValidateDataDictionary() {
         return ConfigContext.getCurrentContextConfig().getBooleanProperty("validate.data.dictionary", false);
     }
 
     public boolean isValidateDataDictionaryEboReferences() {
         return ConfigContext.getCurrentContextConfig().getBooleanProperty("validate.data.dictionary.ebo.references",
                 false);
     }
 
     public boolean isComponentPublishingEnabled() {
         return ConfigContext.getCurrentContextConfig().getBooleanProperty(
                 KRADConstants.Config.COMPONENT_PUBLISHING_ENABLED, false);
     }
 
     public long getComponentPublishingDelay() {
         return ConfigContext.getCurrentContextConfig().getNumericProperty(KRADConstants.Config.COMPONENT_PUBLISHING_DELAY, 0);
     }
 
     /**
      * Used to "poke" the Data Dictionary again after the Spring Context is initialized.  This is to
      * allow for modules loaded with KualiModule after the KNS has already been initialized to work.
      *
      * Also initializes the DateTimeService
      */
     protected void configureDataSource() {
         if (getApplicationDataSource() != null) {
             ConfigContext.getCurrentContextConfig().putObject(KRADConstants.KRAD_APPLICATION_DATASOURCE,
                     getApplicationDataSource());
         }
     }
 
     public DataSource getApplicationDataSource() {
         return this.applicationDataSource;
     }
 
     public void setApplicationDataSource(DataSource applicationDataSource) {
         this.applicationDataSource = applicationDataSource;
     }
 
     /**
      * Indicates whether the legacy KNS module should be included which will include
      * the KNS spring beans file
      *
      * @return boolean true if kns should be supported, false if not
      */
     public boolean isIncludeKnsSpringBeans() {
         return includeKnsSpringBeans;
     }
 
     /**
      * Setter for the include kns support indicator
      *
      * @param includeKnsSpringBeans
      */
     public void setIncludeKnsSpringBeans(boolean includeKnsSpringBeans) {
         this.includeKnsSpringBeans = includeKnsSpringBeans;
     }
 }