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/* 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.activiti.engine.impl.persistence.entity;

import java.util.List;
import java.util.Map;

import org.activiti.engine.delegate.event.ActivitiEventType;
import org.activiti.engine.delegate.event.impl.ActivitiEventBuilder;
import org.activiti.engine.impl.DeploymentQueryImpl;
import org.activiti.engine.impl.Page;
import org.activiti.engine.impl.ProcessDefinitionQueryImpl;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.event.MessageEventHandler;
import org.activiti.engine.impl.jobexecutor.TimerStartEventJobHandler;
import org.activiti.engine.impl.persistence.AbstractManager;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.Model;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.runtime.Job;


/**
 * @author Tom Baeyens
 * @author Joram Barrez
 */
public class DeploymentEntityManager extends AbstractManager {
  
  public void insertDeployment(DeploymentEntity deployment) {
    getDbSqlSession().insert(deployment);
    
    for (ResourceEntity resource : deployment.getResources().values()) {
      resource.setDeploymentId(deployment.getId());
      getResourceManager().insertResource(resource);
    }
  }
  
  public void deleteDeployment(String deploymentId, boolean cascade) {
    List processDefinitions = getDbSqlSession()
            .createProcessDefinitionQuery()
            .deploymentId(deploymentId)
            .list();
    
    // Remove the deployment link from any model. 
    // The model will still exists, as a model is a source for a deployment model and has a different lifecycle
    List models = getDbSqlSession()
            .createModelQueryImpl()
            .deploymentId(deploymentId)
            .list();
    for (Model model : models) {
      ModelEntity modelEntity = (ModelEntity) model;
      modelEntity.setDeploymentId(null);
      getModelManager().updateModel(modelEntity);
    }
    
    if (cascade) {

      // delete process instances
      for (ProcessDefinition processDefinition: processDefinitions) {
        String processDefinitionId = processDefinition.getId();
        
        getProcessInstanceManager()
          .deleteProcessInstancesByProcessDefinition(processDefinitionId, "deleted deployment", cascade);
    
      }
    }

    for (ProcessDefinition processDefinition : processDefinitions) {
      String processDefinitionId = processDefinition.getId();
      // remove related authorization parameters in IdentityLink table
      getIdentityLinkManager().deleteIdentityLinksByProcDef(processDefinitionId);
      
      // event subscriptions
      getEventSubscriptionManager().deleteEventSubscriptionsForProcessDefinition(processDefinitionId);
    }

    // delete process definitions from db
    getProcessDefinitionManager()
      .deleteProcessDefinitionsByDeploymentId(deploymentId);
    
    for (ProcessDefinition processDefinition : processDefinitions) {
      
      // remove timer start events:
      List timerStartJobs = Context.getCommandContext()
        .getJobEntityManager()
        .findJobsByConfiguration(TimerStartEventJobHandler.TYPE, processDefinition.getKey());
      
      if (timerStartJobs != null && !timerStartJobs.isEmpty()) {
        
        long nrOfVersions = new ProcessDefinitionQueryImpl(Context.getCommandContext())
          .processDefinitionKey(processDefinition.getKey())
          .count();

        long nrOfProcessDefinitionsWithSameKey = 0;
        for (ProcessDefinition p : processDefinitions) {
          if (!p.getId().equals(processDefinition.getId()) && p.getKey().equals(processDefinition.getKey())) {
            nrOfProcessDefinitionsWithSameKey++;
          }
        }
        
        if (nrOfVersions - nrOfProcessDefinitionsWithSameKey <= 1) {
          for (Job job : timerStartJobs) {
            if (Context.getProcessEngineConfiguration().getEventDispatcher().isEnabled()) {
              Context.getProcessEngineConfiguration().getEventDispatcher().dispatchEvent(
                ActivitiEventBuilder.createEntityEvent(ActivitiEventType.JOB_CANCELED, job, null, null, processDefinition.getId()));
            }

            ((JobEntity)job).delete();        
          }
        }
      }
      
      // remove message event subscriptions:
      List findEventSubscriptionsByConfiguration = Context
        .getCommandContext()
        .getEventSubscriptionEntityManager()
        .findEventSubscriptionsByConfiguration(MessageEventHandler.EVENT_HANDLER_TYPE, processDefinition.getId(), processDefinition.getTenantId());
      for (EventSubscriptionEntity eventSubscriptionEntity : findEventSubscriptionsByConfiguration) {
        eventSubscriptionEntity.delete();        
      }
    }
    
    getResourceManager()
      .deleteResourcesByDeploymentId(deploymentId);
    
    getDbSqlSession().delete("deleteDeployment", deploymentId);
  }


  public DeploymentEntity findLatestDeploymentByName(String deploymentName) {
    List list = getDbSqlSession().selectList("selectDeploymentsByName", deploymentName, 0, 1);
    if (list!=null && !list.isEmpty()) {
      return (DeploymentEntity) list.get(0);
    }
    return null;
  }
  
  public DeploymentEntity findDeploymentById(String deploymentId) {
    return (DeploymentEntity) getDbSqlSession().selectOne("selectDeploymentById", deploymentId);
  }
  
  public long findDeploymentCountByQueryCriteria(DeploymentQueryImpl deploymentQuery) {
    return (Long) getDbSqlSession().selectOne("selectDeploymentCountByQueryCriteria", deploymentQuery);
  }

  @SuppressWarnings("unchecked")
  public List findDeploymentsByQueryCriteria(DeploymentQueryImpl deploymentQuery, Page page) {
    final String query = "selectDeploymentsByQueryCriteria";
    return getDbSqlSession().selectList(query, deploymentQuery, page);
  }
  
  public List getDeploymentResourceNames(String deploymentId) {
    return getDbSqlSession().getSqlSession().selectList("selectResourceNamesByDeploymentId", deploymentId);
  }

  @SuppressWarnings("unchecked")
  public List findDeploymentsByNativeQuery(Map parameterMap, int firstResult, int maxResults) {
    return getDbSqlSession().selectListWithRawParameter("selectDeploymentByNativeQuery", parameterMap, firstResult, maxResults);
  }

  public long findDeploymentCountByNativeQuery(Map parameterMap) {
    return (Long) getDbSqlSession().selectOne("selectDeploymentCountByNativeQuery", parameterMap);
  }

  public void close() {
  }

  public void flush() {
  }
}