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/*
 * JBoss, Home of Professional Open Source.
 *
 * Copyright 2021 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jboss.resteasy.microprofile.client;

import java.lang.reflect.Method;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import jakarta.ws.rs.client.ClientRequestContext;
import jakarta.ws.rs.client.ClientResponseContext;
import jakarta.ws.rs.client.ClientResponseFilter;
import jakarta.ws.rs.client.ResponseProcessingException;
import jakarta.ws.rs.core.Response;

import org.eclipse.microprofile.rest.client.ext.ResponseExceptionMapper;
import org.jboss.logging.Logger;
import org.jboss.resteasy.client.jaxrs.internal.ClientResponse;
import org.jboss.resteasy.client.jaxrs.internal.ClientResponseContextImpl;

/**
 * This implementation is a bit of a hack and dependent on Resteasy internals.
 * We throw a ResponseProcessingExceptoin that hides the Response object
 */
@SuppressWarnings({ "rawtypes", "unchecked" })
public class ExceptionMapping implements ClientResponseFilter {
    public static class HandlerException extends ResponseProcessingException {
        private static final Logger LOGGER = Logger.getLogger(HandlerException.class);
        protected ClientResponse handled;
        protected List candidates;

        public HandlerException(final ClientResponseContext context, final List candidates) {
            super(null, "Handled Internally");
            this.handled = ((ClientResponseContextImpl) context).getClientResponse();
            this.candidates = candidates;
        }

        public void mapException(final Method method) throws Exception {
            // we cannot close the Response as a pointer to the Response could be used in the application
            // So, instead, let's buffer it which will close the underlying stream.
            handled.bufferEntity();
            for (ResponseExceptionMapper mapper : candidates) {
                Throwable exception = mapper.toThrowable(handled);
                if (exception instanceof RuntimeException)
                    throw (RuntimeException) exception;
                if (exception instanceof Error)
                    throw (Error) exception;
                for (Class exc : method.getExceptionTypes()) {
                    if (exception != null && exc.isAssignableFrom(exception.getClass())) {
                        throw (Exception) exception;
                    }
                }
            }
            // falling through to here means no applicable exception mapper found
            // or applicable mapper returned null
            LOGGER.warnf("No default ResponseExceptionMapper found or user's ResponseExceptionMapper returned null."
                    + "  Response status: %s  messge: %s", handled.getStatus(), handled.getReasonPhrase());

        }
    }

    public ExceptionMapping(final Set