/* 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.rest.service.api.repository;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.rest.common.application.ContentTypeResolver;
import org.activiti.rest.service.api.RestResponseFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;


/**
 * @author Frederik Heremans
 */
@RestController
public class DeploymentResourceResource {
  
  @Autowired
  protected RestResponseFactory restResponseFactory;
  
  @Autowired
  protected ContentTypeResolver contentTypeResolver;
  
  @Autowired
  protected RepositoryService repositoryService;

  @RequestMapping(value="/repository/deployments/{deploymentId}/resources/**", method = RequestMethod.GET, produces = "application/json")
  public DeploymentResourceResponse getDeploymentResource(@PathVariable("deploymentId") String deploymentId, 
      HttpServletRequest request) {
    
    // Check if deployment exists
    Deployment deployment = repositoryService.createDeploymentQuery().deploymentId(deploymentId).singleResult();
    if (deployment == null) {
      throw new ActivitiObjectNotFoundException("Could not find a deployment with id '" + deploymentId + "'.");
    }
    
    String pathInfo = request.getPathInfo();
    String resourceName = pathInfo.replace("/repository/deployments/" + deploymentId + "/resources/", "");
    
    List<String> resourceList = repositoryService.getDeploymentResourceNames(deploymentId);
    
    if (resourceList.contains(resourceName)) {
      // Build resource representation
      DeploymentResourceResponse response = restResponseFactory.createDeploymentResourceResponse(deploymentId, resourceName, 
          contentTypeResolver.resolveContentType(resourceName));
      return response;
      
    } else {
      // Resource not found in deployment
      throw new ActivitiObjectNotFoundException("Could not find a resource with id '" + resourceName
              + "' in deployment '" + deploymentId + "'.");
    }
  }
}