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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.bpmn.deployer;

import java.io.ByteArrayInputStream;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.activiti.engine.impl.bpmn.parser.BpmnParse;
import org.activiti.engine.impl.bpmn.parser.BpmnParser;
import org.activiti.engine.impl.cmd.DeploymentSettings;
import org.activiti.engine.impl.persistence.entity.DeploymentEntity;
import org.activiti.engine.impl.persistence.entity.ProcessDefinitionEntity;
import org.activiti.engine.impl.persistence.entity.ResourceEntity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ParsedDeploymentBuilder {

  private static final Logger log = LoggerFactory.getLogger(ParsedDeploymentBuilder.class);

  protected DeploymentEntity deployment;
  protected BpmnParser bpmnParser;
  protected Map deploymentSettings;

  public ParsedDeploymentBuilder(DeploymentEntity deployment, 
      BpmnParser bpmnParser, Map deploymentSettings) {
    this.deployment = deployment;
    this.bpmnParser = bpmnParser;
    this.deploymentSettings = deploymentSettings;
  }

  public ParsedDeployment build() {
    List processDefinitions = new ArrayList();
    Map processDefinitionsToBpmnParseMap 
      = new LinkedHashMap();
    Map processDefinitionsToResourceMap 
      = new LinkedHashMap();

    for (ResourceEntity resource : deployment.getResources().values()) {
      if (isBpmnResource(resource.getName())) {
        log.debug("Processing BPMN resource {}", resource.getName());
        BpmnParse parse = createBpmnParseFromResource(resource);
        for (ProcessDefinitionEntity processDefinition : parse.getProcessDefinitions()) {
          processDefinitions.add(processDefinition);
          processDefinitionsToBpmnParseMap.put(processDefinition, parse);
          processDefinitionsToResourceMap.put(processDefinition, resource);
        }
      }
    }

    return new ParsedDeployment(deployment, processDefinitions, 
        processDefinitionsToBpmnParseMap, processDefinitionsToResourceMap);
  }

  protected BpmnParse createBpmnParseFromResource(ResourceEntity resource) {
    String resourceName = resource.getName();
    ByteArrayInputStream inputStream = new ByteArrayInputStream(resource.getBytes());

    BpmnParse bpmnParse = bpmnParser.createParse()
        .sourceInputStream(inputStream)
        .setSourceSystemId(resourceName)
        .deployment(deployment)
        .name(resourceName);

    if (deploymentSettings != null) {

      // Schema validation if needed
      if (deploymentSettings.containsKey(DeploymentSettings.IS_BPMN20_XSD_VALIDATION_ENABLED)) {
        bpmnParse.setValidateSchema((Boolean) deploymentSettings.get(DeploymentSettings.IS_BPMN20_XSD_VALIDATION_ENABLED));
      }

      // Process validation if needed
      if (deploymentSettings.containsKey(DeploymentSettings.IS_PROCESS_VALIDATION_ENABLED)) {
        bpmnParse.setValidateProcess((Boolean) deploymentSettings.get(DeploymentSettings.IS_PROCESS_VALIDATION_ENABLED));
      }

    } else {
      // On redeploy, we assume it is validated at the first deploy
      bpmnParse.setValidateSchema(false);
      bpmnParse.setValidateProcess(false);
    }
    
    bpmnParse.execute();
    return bpmnParse;
  }

  protected boolean isBpmnResource(String resourceName) {
    for (String suffix : ResourceNameUtil.BPMN_RESOURCE_SUFFIXES) {
      if (resourceName.endsWith(suffix)) {
        return true;
      }
    }

    return false;
  }

}