/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.rest;

import org.elasticsearch.common.io.stream.BytesStream;
import org.elasticsearch.core.Nullable;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentType;

import java.io.IOException;
import java.io.OutputStream;

/**
 * A channel used to construct bytes / builder based outputs, and send responses.
 */
public interface RestChannel {

    XContentBuilder newBuilder() throws IOException;

    XContentBuilder newErrorBuilder() throws IOException;

    XContentBuilder newBuilder(@Nullable XContentType xContentType, boolean useFiltering) throws IOException;

    XContentBuilder newBuilder(@Nullable XContentType xContentType, @Nullable XContentType responseContentType, boolean useFiltering)
        throws IOException;

    XContentBuilder newBuilder(
        @Nullable XContentType xContentType,
        @Nullable XContentType responseContentType,
        boolean useFiltering,
        OutputStream out
    ) throws IOException;

    BytesStream bytesOutput();

    /**
     * Releases the current output buffer for this channel. Must be called after the buffer derived from {@link #bytesOutput} is no longer
     * needed.
     */
    void releaseOutputBuffer();

    RestRequest request();

    /**
     * @return true iff an error response should contain additional details like exception traces.
     */
    boolean detailedErrorsEnabled();

    void sendResponse(RestResponse response);
}