/*
    * 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.maven.buildcache;
  
  import javax.annotation.Nonnull;
  
  import java.util.List;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.maven.buildcache.xml.config.DirScanConfig;
  import org.apache.maven.buildcache.xml.config.TagExclude;
  import org.apache.maven.buildcache.xml.config.TagScanConfig;
  
  /**
   * PluginScanConfigImpl
   */
  public class PluginScanConfigImpl implements PluginScanConfig {
  
      private final DirScanConfig dto;
  
      public PluginScanConfigImpl(DirScanConfig scanConfig) {
          this.dto = scanConfig;
      }
  
      @Override
      public boolean isSkip() {
          return StringUtils.equals(dto.getMode(), "skip");
      }
  
      @Override
      public boolean accept(String tagName) {
          // include or exclude is a choice element, could be only obe property set
  
          //noinspection ConstantConditions
          final List<TagScanConfig> includes = dto.getIncludes();
          if (!includes.isEmpty()) {
              return findTagScanProperties(tagName) != null;
          }
  
          return !contains(dto.getExcludes(), tagName);
      }
  
      private boolean contains(List<TagExclude> excludes, String tagName) {
          for (TagExclude exclude : excludes) {
              if (StringUtils.equals(exclude.getTagName(), tagName)) {
                  return true;
              }
          }
          return false;
      }
  
      @Nonnull
      @Override
      public PluginScanConfig mergeWith(final PluginScanConfig overrideConfig) {
          if (dto == null) {
              return overrideConfig;
          }
  
          final DirScanConfig override = overrideConfig.dto();
          if (override == null) {
              return this;
          }
  
          if (override.isIgnoreParent()) {
              return overrideConfig;
          }
  
          DirScanConfig merged = new DirScanConfig();
          if (override.getMode() != null) {
              merged.setMode(override.getMode());
          } else {
              merged.setMode(dto.getMode());
          }
  
          merged.getExcludes().addAll(dto.getExcludes());
          merged.getExcludes().addAll(override.getExcludes());
  
          merged.getIncludes().addAll(dto.getIncludes());
          merged.getIncludes().addAll(override.getIncludes());
  
          return new PluginScanConfigImpl(merged);
      }
  
     @Nonnull
     public ScanConfigProperties getTagScanProperties(String tagName) {
         ScanConfigProperties scanProperties = findTagScanProperties(tagName);
         return scanProperties != null ? scanProperties : defaultScanConfig();
     }
 
     @Override
     public DirScanConfig dto() {
         return dto;
     }
 
     private ScanConfigProperties findTagScanProperties(String tagName) {
         ScanConfigProperties scanConfigProperties = findConfigByName(tagName, dto.getIncludes());
         if (scanConfigProperties == null) {
             scanConfigProperties = findConfigByName(tagName, dto.getTagScanConfigs());
         }
         return scanConfigProperties;
     }
 
     private ScanConfigProperties findConfigByName(String tagName, List<TagScanConfig> configs) {
         if (configs == null) {
             return null;
         }
 
         for (TagScanConfig config : configs) {
             if (StringUtils.equals(tagName, config.getTagName())) {
                 return new ScanConfigProperties(config.isRecursive(), config.getGlob());
             }
         }
         return null;
     }
 
     private static ScanConfigProperties defaultScanConfig() {
         return new ScanConfigProperties(true, null);
     }
 }