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/*
 * Copyright (c) 2020 Richard Hauswald - https://quantummaid.de/.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 de.quantummaid.httpmaid.exceptions;

import de.quantummaid.httpmaid.chains.MetaData;
import lombok.AccessLevel;
import lombok.RequiredArgsConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static de.quantummaid.httpmaid.HttpMaidChainKeys.RESPONSE_STATUS;
import static de.quantummaid.httpmaid.http.Http.StatusCodes.INTERNAL_SERVER_ERROR;

/**
 * A {@link ExceptionMapper} that will map an exception to an with an empty body
 * and the status code 500 (Internal Server Error). It will log the stack trace of the exception.
 */
@RequiredArgsConstructor(access = AccessLevel.PRIVATE)
public final class DefaultExceptionMapper implements ExceptionMapper {
    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultExceptionMapper.class);

    public static ExceptionMapper theDefaultExceptionMapper() {
        return new DefaultExceptionMapper();
    }

    @Override
    public void map(final Throwable exception, final MetaData metaData) {
        metaData.set(RESPONSE_STATUS, INTERNAL_SERVER_ERROR);
        if (LOGGER.isErrorEnabled()) {
            LOGGER.error("Exception during request processing\n{}", metaData.prettyPrint(), exception);
        }
    }
}