package etunicorn.controller;

  import etunicorn.entity.Permission;
  import etunicorn.entity.Session;

  import etunicorn.repository.PermissionRepository;
  import etunicorn.service.SessionService;

  import net.minidev.json.JSONObject;

  import org.springframework.beans.factory.annotation.Autowired;

  import org.springframework.http.HttpStatus;
  import org.springframework.http.ResponseEntity;

  import org.springframework.web.bind.annotation.RestController;
  

  import javax.servlet.http.HttpServletRequest;

  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.util.Date;

  
  /**
   * etunicorn-server
   * Copyright © 2017 Le Club Info Polytech Lille
   * Tous droits réservés
   */
  @RestController
  public class BaseController {
  

      // Permettent la vérification de permissions dans les méthodes de controlleur
      @Autowired
      private HttpServletRequest request;
      @Autowired
      private SessionService sessionService;
      @Autowired
      private PermissionRepository permissionRepository;
  

      public void setRequest(HttpServletRequest request) {
          this.request = request;
      }
  

      protected boolean hasPermission(Permission permission) {
          Session session = sessionService.getSession(request);
          if (session == null || permission == null) {
              return false;
          }
          return session.hasPermission(permission);
      }
  
      protected boolean hasPermission(String nomPermission) {
          Permission permission = permissionRepository.findByNom(nomPermission);
          return hasPermission(permission);
      }

  
      // Utilités pour générer des erreurs

      private JSONObject generateErrorJSON(HttpStatus status, String message) {

          JSONObject json = new JSONObject();

          json.put("timestamp", new Date().getTime());

          json.put("status", status.value());
          json.put("message", message);

          json.put("path", request.getPathInfo());
          return json;

      }
  

      public ResponseEntity generateError(HttpStatus status, String message) {
          JSONObject json = generateErrorJSON(status, message);

          return new ResponseEntity(json, status);
      }
  

      public ResponseEntity generateError(HttpStatus status, Exception exception, String message) {
          JSONObject json = generateErrorJSON(status, message);

          json.put("exception", exception.getClass().getCanonicalName());

          json.put("error", exception.getMessage());
          // From http://stackoverflow.com/a/1149721
          StringWriter sw = new StringWriter();
          exception.printStackTrace(new PrintWriter(sw));
          json.put("stacktrace", sw.toString());
          return new ResponseEntity(json, status);

      }
  

      public ResponseEntity generateError(HttpStatus status) {
          return generateError(status, status.getReasonPhrase());

      }
  

      public ResponseEntity generateError(Exception exception) {
          return generateError(HttpStatus.INTERNAL_SERVER_ERROR, exception, exception.getLocalizedMessage());

      }

  }