/*
    * 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.encrypt.api.config;
  
  import lombok.Getter;
  import org.apache.shardingsphere.encrypt.api.config.rule.EncryptTableRuleConfiguration;
  import org.apache.shardingsphere.encrypt.spi.EncryptAlgorithm;
  import org.apache.shardingsphere.encrypt.spi.EncryptAlgorithmMetaData;
  import org.apache.shardingsphere.infra.algorithm.core.config.AlgorithmConfiguration;
  import org.apache.shardingsphere.infra.config.rule.function.EnhancedRuleConfiguration;
  import org.apache.shardingsphere.infra.config.rule.scope.DatabaseRuleConfiguration;
  import org.apache.shardingsphere.infra.spi.type.typed.TypedSPILoader;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Properties;
  
  /**
   * Encrypt rule configuration.
   */
  @Getter
  public final class EncryptRuleConfiguration implements DatabaseRuleConfiguration, EnhancedRuleConfiguration {
      
      private final Collection<EncryptTableRuleConfiguration> tables;
      
      private final Map<String, AlgorithmConfiguration> encryptors;
      
      public EncryptRuleConfiguration(final Collection<EncryptTableRuleConfiguration> tables, final Map<String, AlgorithmConfiguration> encryptors) {
          this.tables = tables;
          this.encryptors = rebuildEncryptorsWithDefaultProperties(encryptors);
      }
      
      private Map<String, AlgorithmConfiguration> rebuildEncryptorsWithDefaultProperties(final Map<String, AlgorithmConfiguration> encryptors) {
          Map<String, AlgorithmConfiguration> result = new HashMap<>(encryptors.size(), 1F);
          for (Entry<String, AlgorithmConfiguration> entry : encryptors.entrySet()) {
              // todo Replace with MultiSourceProperties, MultiSourceProperties need support marshal.
              Properties props = new Properties();
              props.putAll(entry.getValue().getProps());
              Properties defaultProps = TypedSPILoader.findUninitedService(EncryptAlgorithm.class, entry.getValue().getType()).map(EncryptAlgorithm::getMetaData)
                      .map(EncryptAlgorithmMetaData::getDefaultProps).orElseGet(Properties::new);
              defaultProps.forEach(props::putIfAbsent);
              result.put(entry.getKey(), new AlgorithmConfiguration(entry.getValue().getType(), props));
          }
          return result;
      }
      
      @Override
      public boolean isEmpty() {
          return tables.isEmpty();
      }
  }