/*
    * 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.broadcast.rule;
  
  import com.cedarsoftware.util.CaseInsensitiveSet;
  import lombok.Getter;
  import org.apache.shardingsphere.broadcast.config.BroadcastRuleConfiguration;
  import org.apache.shardingsphere.broadcast.constant.BroadcastOrder;
  import org.apache.shardingsphere.broadcast.rule.attribute.BroadcastDataNodeRuleAttribute;
  import org.apache.shardingsphere.broadcast.rule.attribute.BroadcastTableNamesRuleAttribute;
  import org.apache.shardingsphere.broadcast.rule.attribute.BroadcastUnregisterStorageUnitRuleAttribute;
  import org.apache.shardingsphere.infra.annotation.HighFrequencyInvocation;
  import org.apache.shardingsphere.infra.metadata.database.resource.PhysicalDataSourceAggregator;
  import org.apache.shardingsphere.infra.metadata.database.rule.RuleMetaData;
  import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
  import org.apache.shardingsphere.infra.rule.attribute.RuleAttributes;
  import org.apache.shardingsphere.infra.rule.attribute.datasource.aggregate.AggregatedDataSourceRuleAttribute;
  import org.apache.shardingsphere.infra.rule.scope.DatabaseRule;
  
  import javax.sql.DataSource;
  import java.util.Collection;
  import java.util.Map;
  
  /**
   * Broadcast rule.
   */
  @Getter
  public final class BroadcastRule implements DatabaseRule {
      
      private final BroadcastRuleConfiguration configuration;
      
      private final Collection<String> dataSourceNames;
      
      private final Collection<String> tables;
      
      private final RuleAttributes attributes;
      
      public BroadcastRule(final BroadcastRuleConfiguration ruleConfig, final Map<String, DataSource> dataSources, final Collection<ShardingSphereRule> builtRules) {
          configuration = ruleConfig;
          Map<String, DataSource> aggregatedDataSources = new RuleMetaData(builtRules).findAttribute(AggregatedDataSourceRuleAttribute.class)
                  .map(AggregatedDataSourceRuleAttribute::getAggregatedDataSources).orElseGet(() -> PhysicalDataSourceAggregator.getAggregatedDataSources(dataSources, builtRules));
          dataSourceNames = new CaseInsensitiveSet<>(aggregatedDataSources.keySet());
          tables = new CaseInsensitiveSet<>(ruleConfig.getTables());
          attributes = new RuleAttributes(new BroadcastDataNodeRuleAttribute(dataSourceNames, tables),
                  new BroadcastTableNamesRuleAttribute(tables), new AggregatedDataSourceRuleAttribute(aggregatedDataSources), new BroadcastUnregisterStorageUnitRuleAttribute());
      }
      
      /**
       * Get broadcast table names.
       *
       * @param logicTableNames all logic table names
       * @return broadcast table names
       */
      @HighFrequencyInvocation
      public Collection<String> getBroadcastTableNames(final Collection<String> logicTableNames) {
          Collection<String> result = new CaseInsensitiveSet<>();
          for (String each : logicTableNames) {
              if (tables.contains(each)) {
                  result.add(each);
              }
          }
          return result;
      }
      
      @Override
      public int getOrder() {
          return BroadcastOrder.ORDER;
      }
  }