package net.curisit.securis;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.ForbiddenException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.SecurityContext;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;

import net.curisit.securis.services.exception.SeCurisServiceException;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;

@Provider
public class DefaultExceptionHandler implements ExceptionMapper<Exception> {
	private static final Logger LOG = LogManager.getLogger(DefaultExceptionHandler.class);

	public static final String ERROR_MESSAGE_HEADER = "X-SECURIS-ERROR";

	public DefaultExceptionHandler() {
		LOG.info("Creating DefaultExceptionHandler ");
	}

	@Context
	HttpServletRequest request;
	@Context
	SecurityContext bsc;

	@Override
	public Response toResponse(Exception e) {
		if (e instanceof ForbiddenException) {
			LOG.warn("Unauthorized access to {}, user: {}", request.getPathInfo(), bsc.getUserPrincipal());
			return Response.status(Status.UNAUTHORIZED).header(ERROR_MESSAGE_HEADER, "Unathorized access to the application").type(MediaType.APPLICATION_JSON).build();
		}

		if (e instanceof SeCurisServiceException) {
			LOG.warn("SeCurisServiceException accessing to {}, user: {}", request.getPathInfo(), bsc.getUserPrincipal());
			return Response.status(Status.fromStatusCode(((SeCurisServiceException) e).getStatus())).header(ERROR_MESSAGE_HEADER, e.getMessage()).type(MediaType.APPLICATION_JSON).build();
		}

		LOG.error("Unexpected error accesing to '{}' by user: {}", request.getPathInfo(), bsc.getUserPrincipal());
		LOG.error("Request sent from {}, with User-Agent: {}", request.getRemoteHost(), request.getHeader("User-Agent"));
		LOG.error("Request url: " + request.getRequestURL(), e);
		return Response.serverError().header(ERROR_MESSAGE_HEADER, "Unexpected error: " + e.toString()).type(MediaType.APPLICATION_JSON).build();
	}
}