/*
    * 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.importer;
  
  import lombok.Getter;
  import lombok.RequiredArgsConstructor;
  import lombok.ToString;
  import org.apache.shardingsphere.data.pipeline.api.PipelineDataSourceConfiguration;
  import org.apache.shardingsphere.data.pipeline.core.ingest.dumper.mapper.TableAndSchemaNameMapper;
  import org.apache.shardingsphere.infra.metadata.caseinsensitive.CaseInsensitiveIdentifier;
  import org.apache.shardingsphere.infra.metadata.caseinsensitive.CaseInsensitiveQualifiedTable;
  import org.apache.shardingsphere.data.pipeline.core.ratelimit.JobRateLimitAlgorithm;
  import org.apache.shardingsphere.infra.database.core.metadata.database.DialectDatabaseMetaData;
  import org.apache.shardingsphere.infra.database.core.type.DatabaseTypeRegistry;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Map;
  import java.util.Optional;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  /**
   * Importer configuration.
   */
  @RequiredArgsConstructor
  @Getter
  @ToString(exclude = {"dataSourceConfig", "tableAndSchemaNameMapper"})
  public final class ImporterConfiguration {
      
      private final PipelineDataSourceConfiguration dataSourceConfig;
      
      // TODO columnName case-insensitive?
      private final Map<CaseInsensitiveIdentifier, Set<String>> shardingColumnsMap;
      
      private final TableAndSchemaNameMapper tableAndSchemaNameMapper;
      
      private final int batchSize;
      
      private final JobRateLimitAlgorithm rateLimitAlgorithm;
      
      private final int retryTimes;
      
      // TODO Remove concurrency
      private final int concurrency;
      
      /**
       * Get sharding columns.
       *
       * @param logicTableName logic table name
       * @return sharding columns
       */
      public Set<String> getShardingColumns(final String logicTableName) {
          return shardingColumnsMap.getOrDefault(new CaseInsensitiveIdentifier(logicTableName), Collections.emptySet());
      }
      
      /**
       * Find schema name.
       *
       * @param logicTableName logic table name
       * @return schema name
       */
      public Optional<String> findSchemaName(final String logicTableName) {
          DialectDatabaseMetaData dialectDatabaseMetaData = new DatabaseTypeRegistry(dataSourceConfig.getDatabaseType()).getDialectDatabaseMetaData();
          return dialectDatabaseMetaData.isSchemaAvailable() ? Optional.of(tableAndSchemaNameMapper.getSchemaName(logicTableName)) : Optional.empty();
      }
      
      /**
       * Get qualified tables.
       * 
       * @return qualified tables
       */
      public Collection<CaseInsensitiveQualifiedTable> getQualifiedTables() {
          return shardingColumnsMap.keySet().stream()
                  .map(CaseInsensitiveIdentifier::toString).map(each -> new CaseInsensitiveQualifiedTable(tableAndSchemaNameMapper.getSchemaName(each), each)).collect(Collectors.toList());
      }
  }