/*
    * 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.data.pipeline.core.preparer.incremental;
  
  import lombok.extern.slf4j.Slf4j;
  import org.apache.shardingsphere.data.pipeline.api.PipelineDataSourceConfiguration;
  import org.apache.shardingsphere.data.pipeline.api.type.ShardingSpherePipelineDataSourceConfiguration;
  import org.apache.shardingsphere.data.pipeline.api.type.StandardPipelineDataSourceConfiguration;
  import org.apache.shardingsphere.data.pipeline.core.datasource.PipelineDataSourceManager;
  import org.apache.shardingsphere.data.pipeline.core.datasource.PipelineDataSourceWrapper;
  import org.apache.shardingsphere.data.pipeline.core.ingest.dumper.incremental.IncrementalDumperContext;
  import org.apache.shardingsphere.data.pipeline.core.ingest.position.IngestPosition;
  import org.apache.shardingsphere.data.pipeline.core.job.progress.JobItemIncrementalTasksProgress;
  import org.apache.shardingsphere.data.pipeline.core.ingest.position.DialectIngestPositionManager;
  import org.apache.shardingsphere.infra.database.core.spi.DatabaseTypedSPILoader;
  import org.apache.shardingsphere.infra.database.core.type.DatabaseType;
  import org.apache.shardingsphere.infra.datasource.pool.creator.DataSourcePoolCreator;
  import org.apache.shardingsphere.infra.datasource.pool.props.domain.DataSourcePoolProperties;
  import org.apache.shardingsphere.infra.yaml.config.swapper.resource.YamlDataSourceConfigurationSwapper;
  
  import java.sql.SQLException;
  import java.util.Optional;
  
  /**
   * Incremental task position manager.
   */
  @Slf4j
  public final class IncrementalTaskPositionManager {
      
      private final DatabaseType databaseType;
      
      private final DialectIngestPositionManager positionInitializer;
      
      public IncrementalTaskPositionManager(final DatabaseType databaseType) {
          this.databaseType = databaseType;
          positionInitializer = DatabaseTypedSPILoader.getService(DialectIngestPositionManager.class, databaseType);
      }
      
      /**
       * Get ingest position.
       *
       * @param initialProgress initial job item incremental tasks progress
       * @param dumperContext incremental dumper context
       * @param dataSourceManager pipeline data source manager
       * @return ingest position
       * @throws SQLException SQL exception
       */
      public IngestPosition getPosition(final JobItemIncrementalTasksProgress initialProgress,
                                        final IncrementalDumperContext dumperContext, final PipelineDataSourceManager dataSourceManager) throws SQLException {
          if (null != initialProgress) {
              Optional<IngestPosition> position = initialProgress.getIncrementalPosition();
              if (position.isPresent()) {
                  return position.get();
              }
          }
          return positionInitializer.init(dataSourceManager.getDataSource(dumperContext.getCommonContext().getDataSourceConfig()), dumperContext.getJobId());
      }
      
      /**
       * Destroy ingest position.
       *
       * @param jobId pipeline job id
       * @param pipelineDataSourceConfig pipeline data source configuration
       * @throws SQLException SQL exception
       */
      public void destroyPosition(final String jobId, final PipelineDataSourceConfiguration pipelineDataSourceConfig) throws SQLException {
          final long startTimeMillis = System.currentTimeMillis();
          log.info("Cleanup position, database type: {}, pipeline data source type: {}", databaseType.getType(), pipelineDataSourceConfig.getType());
          if (pipelineDataSourceConfig instanceof ShardingSpherePipelineDataSourceConfiguration) {
              destroyPosition(jobId, (ShardingSpherePipelineDataSourceConfiguration) pipelineDataSourceConfig, positionInitializer);
          } else if (pipelineDataSourceConfig instanceof StandardPipelineDataSourceConfiguration) {
              destroyPosition(jobId, (StandardPipelineDataSourceConfiguration) pipelineDataSourceConfig, positionInitializer);
          }
          log.info("destroyPosition cost {} ms", System.currentTimeMillis() - startTimeMillis);
      }
      
      private void destroyPosition(final String jobId,
                                   final ShardingSpherePipelineDataSourceConfiguration pipelineDataSourceConfig, final DialectIngestPositionManager positionInitializer) throws SQLException {
          for (DataSourcePoolProperties each : new YamlDataSourceConfigurationSwapper().getDataSourcePoolPropertiesMap(pipelineDataSourceConfig.getRootConfig()).values()) {
              try (PipelineDataSourceWrapper dataSource = new PipelineDataSourceWrapper(DataSourcePoolCreator.create(each), databaseType)) {
                  positionInitializer.destroy(dataSource, jobId);
              }
          }
      }
     
     private void destroyPosition(final String jobId, final StandardPipelineDataSourceConfiguration pipelineDataSourceConfig,
                                  final DialectIngestPositionManager positionInitializer) throws SQLException {
         try (
                 PipelineDataSourceWrapper dataSource = new PipelineDataSourceWrapper(
                         DataSourcePoolCreator.create((DataSourcePoolProperties) pipelineDataSourceConfig.getDataSourceConfiguration()), databaseType)) {
             positionInitializer.destroy(dataSource, jobId);
         }
     }
 }