/**
 * Copyright 2015-2016 Red Hat, Inc, and individual contributors.
 *
 * 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
 *
 * 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.wildfly.swarm.plugin.gradle;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

import org.gradle.api.Project;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.DependencySet;
import org.gradle.api.artifacts.ResolvedArtifact;
import org.gradle.api.internal.artifacts.dependencies.DefaultDependencyArtifact;
import org.gradle.api.internal.artifacts.dependencies.DefaultExternalModuleDependency;
import org.gradle.api.internal.artifacts.dependencies.DefaultProjectDependency;
import org.gradle.api.internal.project.DefaultProjectAccessListener;
import org.gradle.api.internal.project.ProjectInternal;
import org.wildfly.swarm.tools.ArtifactResolvingHelper;
import org.wildfly.swarm.tools.ArtifactSpec;

/**
 * @author Bob McWhirter
 */
public class GradleArtifactResolvingHelper implements ArtifactResolvingHelper {


    private final Project project;

    Map<String, Project> projects;

    public GradleArtifactResolvingHelper(Project project) {
        this.project = project;
        this.projects = project.getRootProject().getAllprojects().stream().collect(Collectors.toMap(p -> p.getGroup() + ":" + p.getName() + ":" + p.getVersion(), p -> p));
        this.project.getRepositories().maven(repo -> {
            repo.setName("jboss-public");
            repo.setUrl("http://repository.jboss.org/nexus/content/groups/public/");
        });
    }

    @Override
    public ArtifactSpec resolve(final ArtifactSpec spec) {
        if (spec.file != null) {
            return spec;
        }

        final Iterator<ResolvedArtifact> iterator =
                doResolve(new HashSet<>(Collections.singletonList(spec)), false).iterator();
        if (iterator.hasNext()) {
            spec.file = iterator.next().getFile();

            return spec;
        }

        return null;
    }

    @Override
    public Set<ArtifactSpec> resolveAll(final Set<ArtifactSpec> specs, boolean transitive, boolean defaultExcludes) throws Exception {
        if (specs.isEmpty()) {
            return specs;
        }

        return doResolve(specs, transitive)
                .stream()
                .map(artifact -> new ArtifactSpec("default",
                        artifact.getModuleVersion().getId().getGroup(),
                        artifact.getModuleVersion().getId().getName(),
                        artifact.getModuleVersion().getId().getVersion(),
                        artifact.getExtension(),
                        artifact.getClassifier(),
                        artifact.getFile()))
                .collect(Collectors.toSet());
    }

    private Collection<ResolvedArtifact> doResolve(final Collection<ArtifactSpec> deps, boolean transitive) {
        System.err.println( "start doResolve" );
        final Configuration config = this.project.getConfigurations().detachedConfiguration();
        final DependencySet dependencySet = config.getDependencies();

        for (ArtifactSpec dep : deps) {
            System.err.println("doResolve: " + dep);
        }

        config.getResolutionStrategy().setForcedModules(
                this.project.getConfigurations().getByName("compile").getResolutionStrategy().getForcedModules());

        deps.stream()
                .forEach(spec -> {
                    if (projects.containsKey(spec.groupId() + ":" + spec.artifactId() + ":" + spec.version())) {
                        dependencySet.add(new DefaultProjectDependency((ProjectInternal) projects.get(spec.groupId() + ":" + spec.artifactId() + ":" + spec.version()), new DefaultProjectAccessListener(), false));
                    } else {
                        final DefaultExternalModuleDependency d =
                                new DefaultExternalModuleDependency(spec.groupId(), spec.artifactId(), spec.version());
                        final DefaultDependencyArtifact da =
                                new DefaultDependencyArtifact(spec.artifactId(), spec.type(), spec.type(), spec.classifier(), null);

                        System.err.println( "defaultExternalModuleDep: " + d.getName() + " " + d.getVersion() );
                        System.err.println( "defaultDepArtifact: " + da.getName() + " " + da.getClassifier() );
                        d.addArtifact(da);
                        dependencySet.add(d);
                    }
                });

        if (transitive) {
            return config
                    .getResolvedConfiguration()
                    .getResolvedArtifacts();
        }

        return config
                .getResolvedConfiguration()
                .getFirstLevelModuleDependencies()
                .stream()
                .map(dep -> {
                    System.err.println( "first-level: " + dep.getName() + " " + dep.getModuleVersion() );
                    return dep.getModuleArtifacts();
                })
                .flatMap(artifacts -> artifacts.stream())
                .map(e -> {
                    System.err.println("doResolve'd: " + e.getName() + " " + e.getModuleVersion() + " as " + e.getFile() );
                    return e;
                })
                .collect(Collectors.toList());
    }

}

@@ -4754,234 +4754,8 @@
 ll);
-%0A%0A                        System.err.println( %22defaultExternalModuleDep: %22 + d.getName() + %22 %22 + d.getVersion() );%0A                        System.err.println( %22defaultDepArtifact: %22 + da.getName() + %22 %22 + da.getClassifier() );
 %0A   
@@ -5213,143 +5213,8 @@
 p -%3E
- %7B%0A                    System.err.println( %22first-level: %22 + dep.getName() + %22 %22 + dep.getModuleVersion() );%0A                    return
  dep
@@ -5234,35 +5234,16 @@
 ifacts()
-;%0A                %7D
 )%0A      

Revert "More debug to see where things go askew."