/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.shardingsphere.metadata.persist;
  
  import lombok.Getter;
  import org.apache.shardingsphere.infra.config.database.DatabaseConfiguration;
  import org.apache.shardingsphere.infra.config.rule.RuleConfiguration;
  import org.apache.shardingsphere.infra.config.rule.decorator.RuleConfigurationDecorator;
  import org.apache.shardingsphere.infra.datasource.pool.config.DataSourceConfiguration;
  import org.apache.shardingsphere.infra.datasource.pool.props.creator.DataSourcePoolPropertiesCreator;
  import org.apache.shardingsphere.infra.datasource.pool.props.domain.DataSourcePoolProperties;
  import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
  import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
  import org.apache.shardingsphere.metadata.persist.data.ShardingSphereDataPersistService;
  import org.apache.shardingsphere.metadata.persist.service.config.database.datasource.DataSourceNodePersistService;
  import org.apache.shardingsphere.metadata.persist.service.config.database.datasource.DataSourceUnitPersistService;
  import org.apache.shardingsphere.metadata.persist.service.config.database.rule.DatabaseRulePersistService;
  import org.apache.shardingsphere.metadata.persist.service.config.global.GlobalRulePersistService;
  import org.apache.shardingsphere.metadata.persist.service.config.global.PropertiesPersistService;
  import org.apache.shardingsphere.metadata.persist.service.database.DatabaseMetaDataPersistService;
  import org.apache.shardingsphere.metadata.persist.service.version.MetaDataVersionPersistService;
  import org.apache.shardingsphere.mode.spi.PersistRepository;
  
  import javax.sql.DataSource;
  import java.util.Collection;
  import java.util.LinkedHashMap;
  import java.util.LinkedList;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Optional;
  import java.util.Properties;
  import java.util.stream.Collectors;
  
  /**
   * New meta data persist service.
   */
  @Getter
  public final class MetaDataPersistService implements MetaDataBasedPersistService {
      
      private final PersistRepository repository;
      
      private final MetaDataVersionPersistService metaDataVersionPersistService;
      
      private final DataSourceUnitPersistService dataSourceUnitService;
      
      private final DataSourceNodePersistService dataSourceNodeService;
      
      private final DatabaseMetaDataPersistService databaseMetaDataService;
      
      private final DatabaseRulePersistService databaseRulePersistService;
      
      private final GlobalRulePersistService globalRuleService;
      
      private final PropertiesPersistService propsService;
      
      private final ShardingSphereDataPersistService shardingSphereDataPersistService;
      
      public MetaDataPersistService(final PersistRepository repository) {
          this.repository = repository;
          metaDataVersionPersistService = new MetaDataVersionPersistService(repository);
          dataSourceUnitService = new DataSourceUnitPersistService(repository);
          dataSourceNodeService = new DataSourceNodePersistService(repository);
          databaseMetaDataService = new DatabaseMetaDataPersistService(repository, metaDataVersionPersistService);
          databaseRulePersistService = new DatabaseRulePersistService(repository);
          globalRuleService = new GlobalRulePersistService(repository, metaDataVersionPersistService);
          propsService = new PropertiesPersistService(repository, metaDataVersionPersistService);
          shardingSphereDataPersistService = new ShardingSphereDataPersistService(repository);
      }
      
      /**
       * Persist global rule configurations.
       *
       * @param globalRuleConfigs global rule configurations
       * @param props properties
       */
      @Override
      public void persistGlobalRuleConfiguration(final Collection<RuleConfiguration> globalRuleConfigs, final Properties props) {
          globalRuleService.persist(globalRuleConfigs);
          propsService.persist(props);
      }
      
      @Override
      public void persistConfigurations(final String databaseName, final DatabaseConfiguration databaseConfigs, final Map<String, DataSource> dataSources, final Collection<ShardingSphereRule> rules) {
          Map<String, DataSourcePoolProperties> propsMap = getDataSourcePoolPropertiesMap(databaseConfigs);
         if (propsMap.isEmpty() && databaseConfigs.getRuleConfigurations().isEmpty()) {
             databaseMetaDataService.addDatabase(databaseName);
         } else {
             dataSourceUnitService.persist(databaseName, propsMap);
             databaseRulePersistService.persist(databaseName, decorateRuleConfigs(databaseName, dataSources, rules));
         }
     }
     
     @SuppressWarnings({"unchecked", "rawtypes"})
     private Collection<RuleConfiguration> decorateRuleConfigs(final String databaseName, final Map<String, DataSource> dataSources, final Collection<ShardingSphereRule> rules) {
         Collection<RuleConfiguration> result = new LinkedList<>();
         for (ShardingSphereRule each : rules) {
             RuleConfiguration ruleConfig = each.getConfiguration();
             Optional<RuleConfigurationDecorator> decorator = TypedSPILoader.findService(RuleConfigurationDecorator.class, ruleConfig.getClass());
             result.add(decorator.map(optional -> optional.decorate(databaseName, dataSources, rules, ruleConfig)).orElse(ruleConfig));
         }
         return result;
     }
     
     private Map<String, DataSourcePoolProperties> getDataSourcePoolPropertiesMap(final DatabaseConfiguration databaseConfigs) {
         return databaseConfigs.getStorageUnits().entrySet().stream()
                 .collect(Collectors.toMap(Entry::getKey, entry -> entry.getValue().getDataSourcePoolProperties(), (oldValue, currentValue) -> oldValue, LinkedHashMap::new));
     }
     
     @Override
     public Map<String, DataSourceConfiguration> loadDataSourceConfigurations(final String databaseName) {
         return dataSourceUnitService.load(databaseName).entrySet().stream().collect(Collectors.toMap(Entry::getKey,
                 entry -> DataSourcePoolPropertiesCreator.createConfiguration(entry.getValue()), (oldValue, currentValue) -> oldValue, LinkedHashMap::new));
     }
 }