package usecase.user;
   
   import common.http.error.ForwardOnError;
   import common.http.interceptor.InterceptableServlet;
   import usecase.auth.AuthenticationService;
   import usecase.auth.CurrentUser;
   
   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 java.util.ArrayList;
  import java.util.Objects;
  
  /**
   * Servlet relativa alla registrazione di un nuovo utente.
   */
  @WebServlet("/register")
  class RegisterServlet extends InterceptableServlet {
      @Inject private UserService userService;
      @Inject private CurrentUser currentUser;
      @Inject private AuthenticationService authenticationService;
  
      private static final String REGISTER_PAGE = "/WEB-INF/views/register.jsp";
  
      @Override
      protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
          if(currentUser.isLoggedIn()){
              resp.sendRedirect(req.getContextPath());
              return;
          }
          req.getRequestDispatcher(REGISTER_PAGE).forward(req, resp);
      }
  
  
      @Override
      @ForwardOnError(REGISTER_PAGE)
      protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
          if(currentUser.isLoggedIn()){
              resp.sendRedirect(req.getContextPath());
              return;
          }
          String email = req.getParameter("mail");
          String username = req.getParameter("username");
          String password = req.getParameter("pass");
          String confirmPassword = req.getParameter("pass2");
  
          if(!Objects.equals(password, confirmPassword)){
              ArrayList<String> errors = new ArrayList<>();
              errors.add("Le password devono coincidere");
              req.setAttribute("errors",errors);
              req.getRequestDispatcher("/WEB-INF/views/register.jsp").forward(req, resp);
          }else {
              userService.newUser(email, username, password);
              authenticationService.authenticate(username,password);
              resp.sendRedirect(req.getContextPath());
          }
      }
  }