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

/**
 * TestSpanCollector — SpanExporter that groups finished spans by traceId
 * and drains per-trace for embedding in test metadata.
 *
 * @example
 * ```typescript
 * import { TestSpanCollector } from 'autotel/test-span-collector';
 * import { SimpleSpanProcessor } from 'autotel/processors';
 * import { getAutotelTracerProvider } from 'autotel';
 *
 * const collector = new TestSpanCollector();
 * const provider = getAutotelTracerProvider();
 * provider.addSpanProcessor(new SimpleSpanProcessor(collector));
 *
 * // After a test span ends:
 * const spans = collector.drainTrace(traceId, rootSpanId);
 * // spans contains only descendants of rootSpanId
 * ```
 */

/** Attribute value types that survive serialization */
type SerializableValue = string | number | boolean | string[] | number[] | boolean[];
/**
 * Portable serialized span for embedding in test metadata.
 * `startTimeMs` is derived from OTel HrTime — epoch-based wall-clock ms in the current SDK.
 *
 * Defined as a `type` (not `interface`) so it is assignable to
 * `Record<string, unknown>` in TypeScript 6+ strict mode.
 */
type SerializedSpan = {
    spanId: string;
    parentSpanId?: string;
    name: string;
    startTimeMs: number;
    durationMs: number;
    status: 'ok' | 'error' | 'unset';
    statusMessage?: string;
    attributes?: Record<string, SerializableValue>;
};
declare class TestSpanCollector implements SpanExporter {
    private traces;
    export(spans: ReadableSpan[], callback: (result: {
        code: number;
    }) => void): void;
    /**
     * Drain and serialize spans that are descendants of `rootSpanId` within `traceId`.
     * Filters to the subtree rooted at the test span to prevent cross-test mixing.
     * Removes the entire traceId entry from the collector.
     */
    drainTrace(traceId: string, rootSpanId: string): SerializedSpan[];
    shutdown(): Promise<void>;
    forceFlush(): Promise<void>;
}
declare function serializeSpan(span: ReadableSpan): SerializedSpan;

export { type SerializedSpan, TestSpanCollector, serializeSpan };