/*
 * 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.project;

import java.util.ArrayList;
import java.util.Collections;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.aether.graph.Dependency;
import org.eclipse.aether.graph.DependencyNode;

/**
 */
class DefaultDependencyResolutionResult implements DependencyResolutionResult {

    private DependencyNode root;

    private List<Dependency> dependencies = new ArrayList<>();

    private List<Dependency> resolvedDependencies = new ArrayList<>();

    private List<Dependency> unresolvedDependencies = new ArrayList<>();

    private List<Exception> collectionErrors = new ArrayList<>();

    private Map<Dependency, List<Exception>> resolutionErrors = new IdentityHashMap<>();

    @Override
    public DependencyNode getDependencyGraph() {
        return root;
    }

    public void setDependencyGraph(DependencyNode root) {
        this.root = root;
    }

    @Override
    public List<Dependency> getDependencies() {
        return dependencies;
    }

    @Override
    public List<Dependency> getResolvedDependencies() {
        return resolvedDependencies;
    }

    public void addResolvedDependency(Dependency dependency) {
        dependencies.add(dependency);
        resolvedDependencies.add(dependency);
    }

    @Override
    public List<Dependency> getUnresolvedDependencies() {
        return unresolvedDependencies;
    }

    @Override
    public List<Exception> getCollectionErrors() {
        return collectionErrors;
    }

    public void setCollectionErrors(List<Exception> exceptions) {
        if (exceptions != null) {
            this.collectionErrors = exceptions;
        } else {
            this.collectionErrors = new ArrayList<>();
        }
    }

    @Override
    public List<Exception> getResolutionErrors(Dependency dependency) {
        List<Exception> errors = resolutionErrors.get(dependency);
        return (errors != null) ? Collections.unmodifiableList(errors) : Collections.emptyList();
    }

    public void setResolutionErrors(Dependency dependency, List<Exception> errors) {
        dependencies.add(dependency);
        unresolvedDependencies.add(dependency);
        resolutionErrors.put(dependency, errors);
    }
}
