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/*
 * 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.codehaus.plexus.archiver.diags;

import javax.annotation.Nonnull;

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;

import org.codehaus.plexus.archiver.ArchivedFileSet;
import org.codehaus.plexus.archiver.Archiver;
import org.codehaus.plexus.archiver.ArchiverException;
import org.codehaus.plexus.archiver.FileSet;
import org.codehaus.plexus.components.io.resources.PlexusIoResource;
import org.codehaus.plexus.components.io.resources.PlexusIoResourceCollection;
import org.slf4j.Logger;

/**
 * A dry run archiver that does nothing. Some methods fall through to the underlying
 * archiver, but no actions are executed.
 */
public class DryRunArchiver extends DelgatingArchiver {

    private final Logger logger;

    public DryRunArchiver(final Archiver target, final Logger logger) {
        super(target);
        this.logger = logger;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addArchivedFileSet(
            final @Nonnull File archiveFile, final String prefix, final String[] includes, final String[] excludes) {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    private void debug(final String message) {
        if ((logger != null) && logger.isDebugEnabled()) {
            logger.debug(message);
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addArchivedFileSet(final @Nonnull File archiveFile, final String prefix) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addArchivedFileSet(final File archiveFile, final String[] includes, final String[] excludes)
            throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addArchivedFileSet(final @Nonnull File archiveFile) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addDirectory(
            final @Nonnull File directory, final String prefix, final String[] includes, final String[] excludes)
            throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addSymlink(String symlinkName, String symlinkDestination) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addSymlink(String symlinkName, int permissions, String symlinkDestination) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addDirectory(final @Nonnull File directory, final String prefix) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addDirectory(final @Nonnull File directory, final String[] includes, final String[] excludes)
            throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addDirectory(final @Nonnull File directory) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addFile(final @Nonnull File inputFile, final @Nonnull String destFileName, final int permissions)
            throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addFile(final @Nonnull File inputFile, final @Nonnull String destFileName) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void createArchive() throws ArchiverException, IOException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setDotFileDirectory(final File dotFileDirectory) {
        throw new UnsupportedOperationException("Undocumented feature of plexus-archiver; this is not yet supported.");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addArchivedFileSet(final ArchivedFileSet fileSet) throws ArchiverException {

        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    @Override
    public void addArchivedFileSet(ArchivedFileSet fileSet, Charset charset) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void addFileSet(final @Nonnull FileSet fileSet) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    @Override
    public void addResource(PlexusIoResource resource, String destFileName, int permissions) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    @Override
    public void addResources(PlexusIoResourceCollection resources) throws ArchiverException {
        debug("DRY RUN: Skipping delegated call to: " + getMethodName());
    }

    private String getMethodName() {
        final NullPointerException npe = new NullPointerException();
        final StackTraceElement[] trace = npe.getStackTrace();
        final StackTraceElement methodElement = trace[1];
        return methodElement.getMethodName() + " (archiver line: " + methodElement.getLineNumber() + ")";
    }
}