/*
 * 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;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
import org.apache.maven.artifact.resolver.filter.ExclusionSetFilter;
import org.apache.maven.extension.internal.CoreExports;

/**
 */
@Named
@Singleton
@Deprecated
public class DefaultArtifactFilterManager implements ArtifactFilterManager {

    // this is a live injected collection
    protected final List<ArtifactFilterManagerDelegate> delegates;

    protected Set<String> excludedArtifacts;

    private final Set<String> coreArtifacts;

    @Inject
    public DefaultArtifactFilterManager(List<ArtifactFilterManagerDelegate> delegates, CoreExports coreExports) {
        this.delegates = delegates;
        this.coreArtifacts = coreExports.getExportedArtifacts();
    }

    private synchronized Set<String> getExcludedArtifacts() {
        if (excludedArtifacts == null) {
            excludedArtifacts = new LinkedHashSet<>(coreArtifacts);
        }
        return excludedArtifacts;
    }

    /**
     * Returns the artifact filter for the core + extension artifacts.
     *
     * @see org.apache.maven.ArtifactFilterManager#getArtifactFilter()
     */
    @Override
    public ArtifactFilter getArtifactFilter() {
        Set<String> excludes = new LinkedHashSet<>(getExcludedArtifacts());

        for (ArtifactFilterManagerDelegate delegate : delegates) {
            delegate.addExcludes(excludes);
        }

        return new ExclusionSetFilter(excludes);
    }

    /**
     * Returns the artifact filter for the standard core artifacts.
     *
     * @see org.apache.maven.ArtifactFilterManager#getCoreArtifactFilter()
     */
    @Override
    public ArtifactFilter getCoreArtifactFilter() {
        return new ExclusionSetFilter(getCoreArtifactExcludes());
    }

    @Override
    public void excludeArtifact(String artifactId) {
        getExcludedArtifacts().add(artifactId);
    }

    @Override
    public Set<String> getCoreArtifactExcludes() {
        Set<String> excludes = new LinkedHashSet<>(coreArtifacts);

        for (ArtifactFilterManagerDelegate delegate : delegates) {
            delegate.addCoreExcludes(excludes);
        }

        return excludes;
    }
}
