/*
 * 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.repository.metadata;

import org.apache.maven.artifact.ArtifactScopeEnum;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 * This object is tinted with ClasspathTransformation and GraphConflictResolver.
 * Get rid of them after debugging
 *
 * @author <a href="oleg@codehaus.org">Oleg Gusakov</a>
 */
public class MetadataResolutionResult {
    MetadataTreeNode treeRoot;

    /**
     * these components are are initialized on demand by
     * explicit call of the initTreeProcessing()
     */
    ClasspathTransformation classpathTransformation;

    GraphConflictResolver conflictResolver;

    // ----------------------------------------------------------------------------
    public MetadataResolutionResult() {}
    // ----------------------------------------------------------------------------
    public MetadataResolutionResult(MetadataTreeNode root) {
        this.treeRoot = root;
    }
    // ----------------------------------------------------------------------------
    public MetadataTreeNode getTree() {
        return treeRoot;
    }
    // ----------------------------------------------------------------------------
    public void setTree(MetadataTreeNode root) {
        this.treeRoot = root;
    }

    public void initTreeProcessing(PlexusContainer plexus) throws ComponentLookupException {
        classpathTransformation = plexus.lookup(ClasspathTransformation.class);
        conflictResolver = plexus.lookup(GraphConflictResolver.class);
    }
    // ----------------------------------------------------------------------------
    public MetadataGraph getGraph() throws MetadataResolutionException {
        return treeRoot == null ? null : new MetadataGraph(treeRoot);
    }
    // ----------------------------------------------------------------------------
    public MetadataGraph getGraph(ArtifactScopeEnum scope)
            throws MetadataResolutionException, GraphConflictResolutionException {
        if (treeRoot == null) {
            return null;
        }

        if (conflictResolver == null) {
            return null;
        }

        return conflictResolver.resolveConflicts(getGraph(), scope);
    }
    // ----------------------------------------------------------------------------
    public MetadataGraph getGraph(MetadataResolutionRequestTypeEnum requestType)
            throws MetadataResolutionException, GraphConflictResolutionException {
        if (requestType == null) {
            return null;
        }

        if (treeRoot == null) {
            return null;
        }

        if (conflictResolver == null) {
            return null;
        }

        if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathCompile)) {
            return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.compile);
        } else if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathRuntime)) {
            return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.runtime);
        } else if (requestType.equals(MetadataResolutionRequestTypeEnum.classpathTest)) {
            return conflictResolver.resolveConflicts(getGraph(), ArtifactScopeEnum.test);
        } else if (requestType.equals(MetadataResolutionRequestTypeEnum.graph)) {
            return getGraph();
        } else if (requestType.equals(MetadataResolutionRequestTypeEnum.versionedGraph)) {
            return new MetadataGraph(getTree(), true, false);
        } else if (requestType.equals(MetadataResolutionRequestTypeEnum.scopedGraph)) {
            return new MetadataGraph(getTree(), true, true);
        }
        return null;
    }
    // ----------------------------------------------------------------------------
    public ClasspathContainer getClasspath(ArtifactScopeEnum scope)
            throws MetadataGraphTransformationException, MetadataResolutionException {
        if (classpathTransformation == null) {
            return null;
        }

        MetadataGraph dirtyGraph = getGraph();
        if (dirtyGraph == null) {
            return null;
        }

        return classpathTransformation.transform(dirtyGraph, scope, false);
    }

    // ----------------------------------------------------------------------------
    public MetadataTreeNode getClasspathTree(ArtifactScopeEnum scope)
            throws MetadataGraphTransformationException, MetadataResolutionException {
        ClasspathContainer cpc = getClasspath(scope);
        if (cpc == null) {
            return null;
        }

        return cpc.getClasspathAsTree();
    }
    // ----------------------------------------------------------------------------
    // ----------------------------------------------------------------------------
}
