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/*
 * Copyright 2012-2023 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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.grails.cli.compiler.grape;

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

import org.eclipse.aether.artifact.DefaultArtifact;
import org.eclipse.aether.graph.Dependency;
import org.eclipse.aether.graph.Exclusion;
import org.eclipse.aether.util.artifact.JavaScopes;

import org.grails.cli.compiler.dependencies.ArtifactCoordinatesResolver;
import org.grails.cli.compiler.dependencies.CompositeDependencyManagement;
import org.grails.cli.compiler.dependencies.DependencyManagement;
import org.grails.cli.compiler.dependencies.DependencyManagementArtifactCoordinatesResolver;

/**
 * Context used when resolving dependencies.
 *
 * @author Andy Wilkinson
 * @since 2022.1.0
 */
public class DependencyResolutionContext {

    private final Map managedDependencyByGroupAndArtifact = new HashMap<>();

    private final List managedDependencies = new ArrayList<>();

    private DependencyManagement dependencyManagement = null;

    private ArtifactCoordinatesResolver artifactCoordinatesResolver;

    private String getIdentifier(Dependency dependency) {
        return getIdentifier(dependency.getArtifact().getGroupId(), dependency.getArtifact().getArtifactId());
    }

    private String getIdentifier(String groupId, String artifactId) {
        return groupId + ":" + artifactId;
    }

    public ArtifactCoordinatesResolver getArtifactCoordinatesResolver() {
        return this.artifactCoordinatesResolver;
    }

    public String getManagedVersion(String groupId, String artifactId) {
        Dependency dependency = getManagedDependency(groupId, artifactId);
        if (dependency == null) {
            dependency = this.managedDependencyByGroupAndArtifact.get(getIdentifier(groupId, artifactId));
        }
        return (dependency != null) ? dependency.getArtifact().getVersion() : null;
    }

    public List getManagedDependencies() {
        return Collections.unmodifiableList(this.managedDependencies);
    }

    private Dependency getManagedDependency(String group, String artifact) {
        return this.managedDependencyByGroupAndArtifact.get(getIdentifier(group, artifact));
    }

    public void addManagedDependencies(List dependencies) {
        this.managedDependencies.addAll(dependencies);
        for (Dependency dependency : dependencies) {
            this.managedDependencyByGroupAndArtifact.put(getIdentifier(dependency), dependency);
        }
    }

    public void addDependencyManagement(DependencyManagement dependencyManagement) {
        for (org.grails.cli.compiler.dependencies.Dependency dependency : dependencyManagement
                .getDependencies()) {
            List aetherExclusions = new ArrayList<>();
            for (org.grails.cli.compiler.dependencies.Dependency.Exclusion exclusion : dependency
                    .getExclusions()) {
                aetherExclusions.add(new Exclusion(exclusion.getGroupId(), exclusion.getArtifactId(), "*", "*"));
            }
            Dependency aetherDependency = new Dependency(new DefaultArtifact(dependency.getGroupId(),
                    dependency.getArtifactId(), "jar", dependency.getVersion()), JavaScopes.COMPILE, false,
                    aetherExclusions);
            this.managedDependencies.add(0, aetherDependency);
            this.managedDependencyByGroupAndArtifact.put(getIdentifier(aetherDependency), aetherDependency);
        }
        this.dependencyManagement = (this.dependencyManagement != null)
                ? new CompositeDependencyManagement(dependencyManagement, this.dependencyManagement)
                : dependencyManagement;
        this.artifactCoordinatesResolver = new DependencyManagementArtifactCoordinatesResolver(
                this.dependencyManagement);
    }

}