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package io.dropwizard.views.common;

import jakarta.ws.rs.WebApplicationException;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.Response;
import jakarta.ws.rs.ext.Provider;
import org.glassfish.jersey.spi.ExtendedExceptionMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static io.dropwizard.util.Throwables.findThrowableInChain;

/**
 * An {@link ExtendedExceptionMapper} that returns a 500 error response with a generic
 * HTML error page when a {@link ViewRenderException} is the cause.
 *
 * @since 1.1.0
 */
@Provider
public class ViewRenderExceptionMapper implements ExtendedExceptionMapper {

    private static final Logger LOGGER = LoggerFactory.getLogger(ViewRenderExceptionMapper.class);

    /**
     * The generic HTML error page template.
     */
    public static final String TEMPLATE_ERROR_MSG =
            "" +
                "Template Error" +
                "Template Error
Something went wrong rendering the page" +
            "";

    @Override
    public Response toResponse(WebApplicationException exception) {
        LOGGER.error("Template Error", exception);
        return Response.serverError()
                .type(MediaType.TEXT_HTML_TYPE)
                .entity(TEMPLATE_ERROR_MSG)
                .build();
    }

    @Override
    public boolean isMappable(WebApplicationException e) {
        return findThrowableInChain(t -> t.getClass() == ViewRenderException.class, e).isPresent();
    }
}