import { Context } from '@opentelemetry/api';
import { SpanProcessor, SpanExporter, Span, ReadableSpan } from '@opentelemetry/sdk-trace-base';

/**
 * Copyright 2024 Google LLC
 *
 * 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.
 */

/**
 * RealtimeSpanProcessor exports spans both when they start and when they end.
 * This enables real-time trace visualization in development.
 */
declare class RealtimeSpanProcessor implements SpanProcessor {
    private readonly exporter;
    constructor(exporter: SpanExporter);
    /**
     * Called when a span is started. Exports immediately for real-time updates.
     */
    onStart(span: Span, _parentContext: Context): void;
    /**
     * Called when a span ends. Exports again with complete data.
     */
    onEnd(span: ReadableSpan): void;
    /**
     * Forces the exporter to flush any buffered spans.
     */
    forceFlush(): Promise<void>;
    /**
     * Shuts down the processor and exporter.
     */
    shutdown(): Promise<void>;
}

export { RealtimeSpanProcessor };