package common.http.error;
   
   import usecase.auth.AuthenticationRequiredException;
   import usecase.auth.AuthorizationException;
   import usecase.auth.BannedUserException;
   
   import javax.servlet.FilterChain;
   import javax.servlet.ServletException;
   import javax.servlet.annotation.WebFilter;
  import javax.servlet.http.HttpFilter;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.validation.ConstraintViolation;
  import javax.validation.ConstraintViolationException;
  import java.io.IOException;
  import java.time.format.DateTimeFormatter;
  import java.util.stream.Collectors;
  
  import static javax.servlet.http.HttpServletResponse.*;
  
  @WebFilter("*")
  class FallbackExceptionHandlerFilter extends HttpFilter {
      //low priority  todo: fare in modo che tutte le eccezioni non gestite vengano loggate da catalina
  
      @Override
      protected void doFilter(HttpServletRequest req, HttpServletResponse resp, FilterChain chain) throws IOException, ServletException {
          try{
              chain.doFilter(req, resp);
          } catch (IllegalArgumentException e) {
              resp.sendError(SC_BAD_REQUEST, e.getMessage());
          } catch (ConstraintViolationException e) {
              String messages = e.getConstraintViolations().stream()
                      .map(ConstraintViolation::getMessage).collect(Collectors.joining("\n"));
              resp.sendError(SC_BAD_REQUEST, messages);
          } catch (AuthenticationRequiredException e) {
              resp.sendError(SC_UNAUTHORIZED, e.getMessage());
          } catch (BannedUserException e){
              if (e.getDuration() != null){
                  String end  = DateTimeFormatter.ISO_INSTANT.format(e.getDuration());
                  resp.sendError(SC_FORBIDDEN, "Sei bannato fino a " + end);
              } else {
                  resp.sendError(SC_FORBIDDEN, e.getMessage());
              }
          } catch (AuthorizationException e) {
              resp.sendError(SC_FORBIDDEN, e.getMessage());
          }
      }
  }