import { afterEach, describe, expect, it, vi } from 'vitest';
import { extractFromText } from './extraction-client.js';

describe('extraction client request propagation', () => {
  afterEach(() => {
    vi.unstubAllGlobals();
  });

  it('sends x-request-id to extraction-service when provided', async () => {
    const fetchMock = vi.fn(async () => new Response(JSON.stringify({ summary: 'ok' }), { status: 200 }));
    vi.stubGlobal('fetch', fetchMock);

    await extractFromText('hello', 'summarization', { requestId: 'req-propagated' });

    expect(fetchMock).toHaveBeenCalledOnce();
    const init = fetchMock.mock.calls[0]?.[1] as RequestInit;
    expect(init.headers).toMatchObject({
      'Content-Type': 'application/json',
      'x-request-id': 'req-propagated',
    });
  });

  it('maps extraction-service failures to a structured dependency error', async () => {
    vi.stubGlobal(
      'fetch',
      vi.fn(async () => new Response(JSON.stringify({ error: 'down' }), { status: 503, statusText: 'Service Unavailable' })),
    );

    await expect(extractFromText('hello', 'summarization')).rejects.toMatchObject({
      statusCode: 502,
      message: 'Extraction service failed',
      details: {
        code: 'EXTRACTION_SERVICE_FAILURE',
        dependency: 'extraction-service',
      },
    });
  });
});