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/*
 * Copyright 2017-2024 original authors
 *
 * 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
 *
 * https://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 io.micronaut.http.body;

import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.core.io.buffer.ByteBuffer;
import io.micronaut.core.io.buffer.ByteBufferFactory;
import io.micronaut.core.type.Argument;
import io.micronaut.core.type.MutableHeaders;
import io.micronaut.http.ByteBodyHttpResponse;
import io.micronaut.http.ByteBodyHttpResponseWrapper;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.HttpResponse;
import io.micronaut.http.MediaType;
import io.micronaut.http.MutableHttpHeaders;
import io.micronaut.http.MutableHttpResponse;
import io.micronaut.http.codec.CodecException;

import java.io.OutputStream;

/**
 * {@link ResponseBodyWriter} implementation that delegates to a {@link MessageBodyWriter}.
 *
 * @param  The body type
 * @since 4.7.0
 * @author Jonas Konrad
 */
@Internal
final class ResponseBodyWriterWrapper implements ResponseBodyWriter {
    private final MessageBodyWriter wrapped;

    ResponseBodyWriterWrapper(MessageBodyWriter wrapped) {
        this.wrapped = wrapped;
    }

    @Override
    public boolean isWriteable(@NonNull Argument type, @Nullable MediaType mediaType) {
        return wrapped.isWriteable(type, mediaType);
    }

    @Override
    public MessageBodyWriter createSpecific(@NonNull Argument type) {
        return wrapped.createSpecific(type);
    }

    @Override
    public boolean isBlocking() {
        return wrapped.isBlocking();
    }

    @Override
    public void writeTo(@NonNull Argument type, @NonNull MediaType mediaType, T object, @NonNull MutableHeaders outgoingHeaders, @NonNull OutputStream outputStream) throws CodecException {
        wrapped.writeTo(type, mediaType, object, outgoingHeaders, outputStream);
    }

    @Override
    public @NonNull ByteBuffer writeTo(@NonNull Argument type, @NonNull MediaType mediaType, T object, @NonNull MutableHeaders outgoingHeaders, @NonNull ByteBufferFactory bufferFactory) throws CodecException {
        return wrapped.writeTo(type, mediaType, object, outgoingHeaders, bufferFactory);
    }

    @Override
    public @NonNull ByteBodyHttpResponse write(@NonNull ByteBodyFactory bodyFactory, @NonNull HttpRequest request, @NonNull MutableHttpResponse httpResponse, @NonNull Argument type, @NonNull MediaType mediaType, T object) throws CodecException {
        return ByteBodyHttpResponseWrapper.wrap(httpResponse, writePiece(bodyFactory, httpResponse.getHeaders(), type, mediaType, object));
    }

    @Override
    public CloseableByteBody writePiece(@NonNull ByteBodyFactory bodyFactory, @NonNull HttpRequest request, @NonNull HttpResponse response, @NonNull Argument type, @NonNull MediaType mediaType, T object) {
        return writePiece(bodyFactory, response.toMutableResponse().getHeaders(), type, mediaType, object);
    }

    private @NonNull CloseableByteBody writePiece(@NonNull ByteBodyFactory bodyFactory, MutableHttpHeaders headers, @NonNull Argument type, @NonNull MediaType mediaType, T object) {
        return bodyFactory.buffer(s -> writeTo(type, mediaType, object, headers, s));
    }
}