package org.apache.maven.plugins.enforcer;

/*
 * 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.
 */

import java.util.ArrayList;
import java.util.List;

import org.apache.maven.enforcer.rule.api.EnforcerRuleException;
import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
import org.codehaus.plexus.util.StringUtils;

/**
 * Ensure that all profiles mentioned on the commandline do exist. 
 * 
 * @author Robert Scholte
 * @author Gabriel Belingueres
 */
public class RequireProfileIdsExist extends AbstractNonCacheableEnforcerRule
{
    @Override
    public void execute( EnforcerRuleHelper helper )
        throws EnforcerRuleException
    {
        try
        {
            MavenSession session = (MavenSession) helper.evaluate( "${session}" );

            List<String> profileIds = new ArrayList<String>();
            profileIds.addAll( session.getProjectBuildingRequest().getActiveProfileIds() );
            profileIds.addAll( session.getProjectBuildingRequest().getInactiveProfileIds() );

            for ( MavenProject project : session.getProjects() )
            {
                // iterate over all parents
                MavenProject currentProject = project;
                do
                {
                    for ( org.apache.maven.model.Profile profile : currentProject.getModel().getProfiles() )
                    {
                        profileIds.remove( profile.getId() );

                        if ( profileIds.isEmpty() )
                        {
                            return;
                        }
                    }

                    currentProject = currentProject.getParent();
                }
                while ( currentProject != null );
            }

            for ( org.apache.maven.settings.Profile profile : session.getSettings().getProfiles() )
            {
                profileIds.remove( profile.getId() );
            }

            if ( profileIds.isEmpty() )
            {
                return;
            }

            StringBuilder sb = new StringBuilder();
            if ( profileIds.size() > 1 )
            {
                sb.append( "The requested profiles don't exist: " );
            }
            else
            {
                sb.append( "The requested profile doesn't exist: " );
            }
            sb.append( StringUtils.join( profileIds.iterator(), ", " ) );

            throw new EnforcerRuleException( sb.toString() );
        }
        catch ( ExpressionEvaluationException e )
        {
            throw new EnforcerRuleException( e.getMessage() );
        }
    }
}