/*
 * 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.syncope.core.workflow.java;

import java.io.OutputStream;
import java.util.Collections;
import java.util.List;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.syncope.common.lib.patch.GroupPatch;
import org.apache.syncope.common.lib.to.GroupTO;
import org.apache.syncope.common.lib.to.WorkflowDefinitionTO;
import org.apache.syncope.common.lib.to.WorkflowFormTO;
import org.apache.syncope.common.lib.to.WorkflowTaskTO;
import org.apache.syncope.core.provisioning.api.PropagationByResource;
import org.apache.syncope.common.lib.types.ResourceOperation;
import org.apache.syncope.core.persistence.api.dao.search.OrderByClause;
import org.apache.syncope.core.persistence.api.entity.group.Group;
import org.apache.syncope.core.provisioning.api.WorkflowResult;
import org.apache.syncope.core.workflow.api.WorkflowDefinitionFormat;
import org.apache.syncope.core.workflow.api.WorkflowException;

/**
 * Simple implementation basically not involving any workflow engine.
 */
public class DefaultGroupWorkflowAdapter extends AbstractGroupWorkflowAdapter {

    @Override
    public boolean supportsDefinitionEdit() {
        return false;
    }

    @Override
    protected WorkflowResult<String> doCreate(final GroupTO groupTO) {
        Group group = entityFactory.newEntity(Group.class);
        dataBinder.create(group, groupTO);
        group = groupDAO.saveAndRefreshDynMemberships(group);

        PropagationByResource propByRes = new PropagationByResource();
        propByRes.set(ResourceOperation.CREATE, groupDAO.findAllResourceKeys(group.getKey()));

        return new WorkflowResult<>(group.getKey(), propByRes, "create");
    }

    @Override
    protected WorkflowResult<GroupPatch> doUpdate(final Group group, final GroupPatch groupPatch) {
        PropagationByResource propByRes = dataBinder.update(group, groupPatch);
        return new WorkflowResult<>(groupPatch, propByRes, "update");
    }

    @Override
    protected void doDelete(final Group group) {
        groupDAO.delete(group);
    }

    @Override
    public WorkflowResult<String> execute(final GroupTO group, final String taskId) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public Pair<Integer, List<WorkflowFormTO>> getForms(
            final int page, final int size, final List<OrderByClause> orderByClauses) {

        return Pair.of(0, Collections.<WorkflowFormTO>emptyList());
    }

    @Override
    public WorkflowFormTO getForm(final String workflowId) {
        return null;
    }

    @Override
    public WorkflowFormTO claimForm(final String taskId) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }
    
    @Override
    public WorkflowFormTO unclaimForm(final String taskId) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public WorkflowResult<GroupPatch> submitForm(final WorkflowFormTO form) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public List<WorkflowTaskTO> getAvailableTasks(final String workflowId) {
        return Collections.emptyList();
    }

    @Override
    public List<WorkflowDefinitionTO> getDefinitions() {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public void exportDefinition(final String key, final WorkflowDefinitionFormat format, final OutputStream os) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public void exportDiagram(final String key, final OutputStream os) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public void importDefinition(final String key, final WorkflowDefinitionFormat format, final String definition) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }

    @Override
    public void deleteDefinition(final String key) {
        throw new WorkflowException(new UnsupportedOperationException("Not supported."));
    }
}
