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 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
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// Portions Copyright [2016-2022] [Payara Foundation and/or its affiliates]
package org.glassfish.weld.connector;

import org.glassfish.api.deployment.DeploymentContext;
import org.glassfish.api.deployment.archive.ArchiveType;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.internal.deployment.GenericSniffer;
import org.jvnet.hk2.annotations.Service;

import javax.enterprise.deploy.shared.ModuleType;
import jakarta.inject.Singleton;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;

/**
 * Implementation of the Sniffer for Weld.
 */
@Service(name = "weld")
@Singleton
public class WeldSniffer extends GenericSniffer {

  private static final String[] containers = { "org.glassfish.weld.WeldContainer" };
  private static final java.util.logging.Logger logger = java.util.logging.Logger.getLogger(WeldSniffer.class.getName());

  public WeldSniffer() {
    // We do not haGenericSniffer(String containerName, String appStigma, String urlPattern
    super("cdi", null /* appStigma */, null /* urlPattern */);
  }

  /**
   * Returns true if the archive contains beans.xml as defined by packaging rules of Weld
   */
  @Override
  public boolean handles(DeploymentContext context) {
    ArchiveType archiveType = habitat.getService(ArchiveType.class, context.getArchiveHandler().getArchiveType());
    if (archiveType != null && !supportsArchiveType(archiveType)) {
      return false;
    }

    ReadableArchive archive = context.getSource();

    boolean isWeldArchive = false;
    // scan for beans.xml in expected locations. If at least one is found without bean-discovery-mode="none", this is
    // a Weld archive
    if (isEntryPresent(archive, WeldUtils.WEB_INF)) {
      isWeldArchive = isArchiveCDIEnabled(context, archive, WeldUtils.WEB_INF_BEANS_XML) ||
              isArchiveCDIEnabled(context, archive, WeldUtils.WEB_INF_CLASSES_META_INF_BEANS_XML);

      if (!isWeldArchive) {
        // Check jars under WEB_INF/lib
        if (isEntryPresent(archive, WeldUtils.WEB_INF_LIB)) {
          isWeldArchive = scanLibDir(context, archive, WeldUtils.WEB_INF_LIB);
        }
      }

      if(!isWeldArchive) {
        isWeldArchive = WeldUtils.hasExtension(archive);
      }
    }

    // TODO This doesn't seem to match the ReadableArchive for a stand-alone ejb-jar.
    // It might only be true for an ejb-jar within an .ear.  Revisit when officially
    // adding support for .ears
    String archiveName = archive.getName();
    if (!isWeldArchive && archiveName != null && archiveName.endsWith(WeldUtils.EXPANDED_JAR_SUFFIX)) {
      isWeldArchive = isArchiveCDIEnabled(context, archive, WeldUtils.META_INF_BEANS_XML);
    }

    // If stand-alone ejb-jar
    if (!isWeldArchive && isArchiveCDIEnabled(context, archive, WeldUtils.META_INF_BEANS_XML)) {
      isWeldArchive = true;
    }

    if (!isWeldArchive && archiveName != null && archiveName.endsWith(WeldUtils.EXPANDED_RAR_SUFFIX)) {
      isWeldArchive = isArchiveCDIEnabled(context, archive, WeldUtils.META_INF_BEANS_XML);
      if (!isWeldArchive) {
        // Check jars in root dir of rar
        isWeldArchive = scanLibDir(context, archive, "");
      }
    }

    return isWeldArchive;
  }

  private boolean scanLibDir(DeploymentContext context, ReadableArchive archive, String libLocation) {
    boolean entryPresent = false;
    if (libLocation != null) {
      Enumeration entries = archive.entries(libLocation);
      while (entries.hasMoreElements() && !entryPresent) {
        String entryName = entries.nextElement();
        // if a jar in lib dir and not WEB-INF/lib/foo/bar.jar
        if (entryName.endsWith(WeldUtils.JAR_SUFFIX) &&
          entryName.indexOf(WeldUtils.SEPARATOR_CHAR, libLocation.length() + 1 ) == -1 ) {
          try {
            ReadableArchive jarInLib = archive.getSubArchive(entryName);
            if (jarInLib != null) {
              entryPresent = isArchiveCDIEnabled(context, jarInLib, WeldUtils.META_INF_BEANS_XML);
              jarInLib.close();
            }
          } catch (IOException e) {
          }
        }
      }
    }
    return entryPresent;
  }

  protected boolean isEntryPresent(ReadableArchive archive, String entry) {
    boolean entryPresent = false;
    try {
      entryPresent = archive.exists(entry);
    } catch (IOException e) {
      // ignore
    }
    return entryPresent;
  }

	protected boolean isArchiveCDIEnabled(DeploymentContext context, ReadableArchive archive, String relativeBeansXmlPath) {
		String beanDiscoveryMode = null;
		InputStream beansXmlInputStream = null;

		if (archive != null) {
            try {
                beansXmlInputStream = archive.getEntry(relativeBeansXmlPath);
                if (beansXmlInputStream != null) {
                    try {
                        beanDiscoveryMode = WeldUtils.getBeanDiscoveryMode(beansXmlInputStream);
                    } finally {
                        try {
                            beansXmlInputStream.close();
                        } catch (Exception ignore) {
                        }
                    }
                }
            } catch (IOException ignore) {
            }
        }

		if (beansXmlInputStream == null) {
			// no beans.xml
			try {
				return WeldUtils.isImplicitBeanArchive(context, archive);
			} catch (IOException e) {
				return false;
			}
		}

		// There is a beans.xml.
		if (beanDiscoveryMode == null || beanDiscoveryMode.equals("all") || beanDiscoveryMode.equals("annotated")) {
			return true;
		} else if (beanDiscoveryMode.equals("none")) {
			// beanDiscoveryMode = none
			return false;
		}

		// last case is beanDiscoveryMode = annotated
		try {
			return WeldUtils.isImplicitBeanArchive(context, archive);
		} catch (IOException e) {
			return false;
		}
	}

  public String[] getContainersNames() {
    return containers;
  }

  /**
   *
   * This API is used to help determine if the sniffer should recognize
   * the current archive.
   * If the sniffer does not support the archive type associated with
   * the current deployment, the sniffer should not recognize the archive.
   *
   * @param archiveType the archive type to check
   * @return whether the sniffer supports the archive type
   *
   */
  public boolean supportsArchiveType(ArchiveType archiveType) {
    if (archiveType.toString().equals(ModuleType.WAR.toString()) ||
      archiveType.toString().equals(ModuleType.EJB.toString()) ||
      archiveType.toString().equals(ModuleType.RAR.toString())) {
      return true;
    }
    return false;
  }


  @Override
  public String[] getAnnotationNames(DeploymentContext context) {
    // first see if bean-discovery-mode is explicitly set to "none".
    InputStream beansXmlInputStream = WeldUtils.getBeansXmlInputStream( context );
    if ( beansXmlInputStream != null ) {
      try {
        String beanDiscoveryMode = WeldUtils.getBeanDiscoveryMode( beansXmlInputStream );
        if ( beanDiscoveryMode.equals( "none" ) ) {
          return null;
        }
      } finally {
        try {
          beansXmlInputStream.close();
        } catch (IOException ignore) {
        }
      }
    }

    // make sure it's not an extension
    if ( ! WeldUtils.isValidBdaBasedOnExtensionAndBeansXml( context.getSource() )) {
      return null;
    }


      return WeldUtils.isImplicitBeanDiscoveryEnabled(context) ? WeldUtils.getCDIEnablingAnnotations(context) : null;
  }
}