package usecase.vote;
   
   import common.http.ParameterConverter;
   import common.http.error.JSONError;
   import common.http.interceptor.InterceptableServlet;
   import usecase.auth.AuthorizationConstraints;
   
   import javax.inject.Inject;
   import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  import static usecase.auth.AuthorizationConstraints.Types.REQUIRE_AUTHENTICATION;
  
  /**
   * Servlet che permette di assegnare un voto ad un contenuto.
   */
  @WebServlet("/vote")
  @AuthorizationConstraints(REQUIRE_AUTHENTICATION)
  class VoteServlet extends InterceptableServlet {
      @Inject private VoteService service;
  
      @Override
      @JSONError
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          ParameterConverter converter = new ParameterConverter(request);
          int id = converter.getIntParameter("id").orElse(0);
          String vote = request.getParameter("vote");
          String type = request.getParameter("type");
  
          if("post".equalsIgnoreCase(type)){
              if("upvote".equalsIgnoreCase(vote))
                  service.upvotePost(id);
              else if("downvote".equalsIgnoreCase(vote))
                  service.downvotePost(id);
              else
                  throw new IllegalArgumentException();
          }else if("comment".equalsIgnoreCase(type)){
              if("upvote".equalsIgnoreCase(vote))
                  service.upvoteComment(id);
              else if("downvote".equalsIgnoreCase(vote))
                  service.downvoteComment(id);
              else
                  throw new IllegalArgumentException();
          }else{
              throw new IllegalArgumentException();
          }
      }
  
      @Override
      @JSONError
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request,response);
      }
  }