/*
    * 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.search.backend.remoterepository;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.maven.search.api.MAVEN;
  import org.apache.maven.search.api.SearchRequest;
  import org.apache.maven.search.api.request.BooleanQuery;
  import org.apache.maven.search.api.request.Field;
  import org.apache.maven.search.api.request.FieldQuery;
  import org.apache.maven.search.api.request.Query;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Class that "disassembles" the query and populates fields and values and exposes them.
   */
  public final class Context {
      private final SearchRequest searchRequest;
  
      private final Map<Field, String> fields;
  
      public Context(SearchRequest searchRequest) {
          this.searchRequest = requireNonNull(searchRequest);
          this.fields = new HashMap<>();
          populateFields(searchRequest.getQuery());
      }
  
      private void populateFields(Query query) {
          if (query instanceof BooleanQuery) {
              populateFields(((BooleanQuery) query).getLeft());
              populateFields(((BooleanQuery) query).getRight());
          } else if (query instanceof FieldQuery) {
              fields.put(((FieldQuery) query).getField(), query.getValue());
          } else {
              throw new IllegalArgumentException("Unsupported Query type: " + query.getClass());
          }
      }
  
      public SearchRequest getSearchRequest() {
          return searchRequest;
      }
  
      public String getFieldValue(Field field) {
          return fields.get(field);
      }
  
      public String getGroupId() {
          return getFieldValue(MAVEN.GROUP_ID);
      }
  
      public String getArtifactId() {
          return getFieldValue(MAVEN.ARTIFACT_ID);
      }
  
      public String getVersion() {
          return getFieldValue(MAVEN.VERSION);
      }
  
      public String getClassifier() {
          return getFieldValue(MAVEN.CLASSIFIER);
      }
  
      public String getFileExtension() {
          return getFieldValue(MAVEN.FILE_EXTENSION);
      }
  
      public String getSha1() {
          return getFieldValue(MAVEN.SHA1);
      }
  }