/*
    * 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.model.io;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  import javax.xml.stream.Location;
  import javax.xml.stream.XMLInputFactory;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.XMLStreamReader;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.Reader;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.Map;
  import java.util.Objects;
  
  import org.apache.maven.model.InputSource;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.building.ModelSourceTransformer;
  import org.apache.maven.model.v4.MavenStaxReader;
  
  /**
   * Handles deserialization of a model from some kind of textual format like XML.
   *
   */
  @Named
  @Singleton
  public class DefaultModelReader implements ModelReader {
      private final ModelSourceTransformer transformer;
  
      @Inject
      public DefaultModelReader(ModelSourceTransformer transformer) {
          this.transformer = transformer;
      }
  
      @Override
      public Model read(File input, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(input, "input cannot be null");
          return read(input.toPath(), options);
      }
  
      @Override
      public Model read(Path path, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(path, "path cannot be null");
  
          try (InputStream in = Files.newInputStream(path)) {
              Model model = read(in, path, options);
  
              model.setPomPath(path);
  
              return model;
          }
      }
  
      @Override
      public Model read(Reader input, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(input, "input cannot be null");
  
          try (Reader in = input) {
              return read(in, null, options);
          }
      }
  
      @Override
      public Model read(InputStream input, Map<String, ?> options) throws IOException {
          Objects.requireNonNull(input, "input cannot be null");
  
          try (InputStream in = input) {
              return read(input, null, options);
          }
      }
  
      private boolean isStrict(Map<String, ?> options) {
          Object value = (options != null) ? options.get(IS_STRICT) : null;
          return value == null || Boolean.parseBoolean(value.toString());
      }
  
      private InputSource getSource(Map<String, ?> options) {
         Object value = (options != null) ? options.get(INPUT_SOURCE) : null;
         return (InputSource) value;
     }
 
     private Path getRootDirectory(Map<String, ?> options) {
         Object value = (options != null) ? options.get(ROOT_DIRECTORY) : null;
         return (Path) value;
     }
 
     private Model read(InputStream input, Path pomFile, Map<String, ?> options) throws IOException {
         try {
             XMLInputFactory factory = new com.ctc.wstx.stax.WstxInputFactory();
             factory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, false);
             XMLStreamReader parser = factory.createXMLStreamReader(input);
 
             InputSource source = getSource(options);
             boolean strict = isStrict(options);
             MavenStaxReader mr = new MavenStaxReader();
             mr.setAddLocationInformation(source != null);
             Model model = new Model(mr.read(parser, strict, source != null ? source.toApiSource() : null));
             return model;
         } catch (XMLStreamException e) {
             Location location = e.getLocation();
             throw new ModelParseException(
                     e.getMessage(),
                     location != null ? location.getLineNumber() : -1,
                     location != null ? location.getColumnNumber() : -1,
                     e);
         } catch (Exception e) {
             throw new IOException("Unable to transform pom", e);
         }
     }
 
     private Model read(Reader reader, Path pomFile, Map<String, ?> options) throws IOException {
         try {
             XMLInputFactory factory = new com.ctc.wstx.stax.WstxInputFactory();
             factory.setProperty(XMLInputFactory.IS_REPLACING_ENTITY_REFERENCES, false);
             XMLStreamReader parser = factory.createXMLStreamReader(reader);
 
             InputSource source = getSource(options);
             boolean strict = isStrict(options);
             MavenStaxReader mr = new MavenStaxReader();
             mr.setAddLocationInformation(source != null);
             Model model = new Model(mr.read(parser, strict, source != null ? source.toApiSource() : null));
             return model;
         } catch (XMLStreamException e) {
             Location location = e.getLocation();
             throw new ModelParseException(
                     e.getMessage(),
                     location != null ? location.getLineNumber() : -1,
                     location != null ? location.getColumnNumber() : -1,
                     e);
         } catch (Exception e) {
             throw new IOException("Unable to transform pom", e);
         }
     }
 }