/**
 * v0.42.20.0 (Fix 3, #1775) — query-embed deadline unit tests.
 *
 * The regression: `search`/`query` default to cheap-hybrid, which embeds the
 * query. A stalled embedding provider made the embed `await` never settle, so
 * the handler never reached the keyword fallback and the CLI force-exited at 10s
 * with no output. `embedQueryBounded` bounds the embed so it THROWS on timeout
 * → the caller's existing try/catch falls back to keyword.
 *
 * These tests prove the bound fires even when the transport IGNORES the
 * abortSignal (the Promise.race guarantee — codex #3: abortSignal alone is
 * insufficient against a wedged provider), and that a shared/elapsed deadline
 * makes a second embed fail FAST (worst case ~one timeout, not two).
 */
import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
import {
  configureGateway,
  resetGateway,
  __setEmbedTransportForTests,
} from '../../src/core/ai/gateway.ts';
import { embedQueryBounded, makeQueryEmbedDeadline } from '../../src/core/search/hybrid.ts';

describe('embedQueryBounded — query-embed deadline', () => {
  beforeEach(() => {
    resetGateway();
    configureGateway({
      embedding_model: 'voyage:voyage-4-large',
      embedding_dimensions: 1024,
      env: { VOYAGE_API_KEY: 'voyage-fake' },
    });
  });
  afterEach(() => {
    __setEmbedTransportForTests(null);
    resetGateway();
  });

  test('rejects within the budget when the transport hangs (ignores abort)', async () => {
    // Transport never resolves AND ignores the abort signal — only the
    // Promise.race deadline can save us.
    __setEmbedTransportForTests(() => new Promise(() => { /* hang forever */ }));
    const dl = makeQueryEmbedDeadline(200);
    const start = Date.now();
    let threw = false;
    try {
      await embedQueryBounded('locker code', undefined, dl);
    } catch (e) {
      threw = true;
      expect(String((e as Error).message)).toContain('deadline');
    }
    const elapsed = Date.now() - start;
    expect(threw).toBe(true);
    // The 200ms deadline is floored to MIN_QUERY_EMBED_BUDGET_MS (2s) — the bound
    // still fires (not infinite hang), comfortably under the 10s CLI force-exit.
    expect(elapsed).toBeLessThan(3000);
  });

  test('an already-elapsed shared deadline is floored, not fresh-6s (codex floor)', async () => {
    __setEmbedTransportForTests(() => new Promise(() => { /* hang forever */ }));
    // Simulate the inner embed reusing a deadline the cache-lookup already spent.
    const dl = { signal: AbortSignal.timeout(1), deadlineAt: Date.now() - 5 };
    const start = Date.now();
    let threw = false;
    try {
      await embedQueryBounded('q', undefined, dl);
    } catch {
      threw = true;
    }
    const elapsed = Date.now() - start;
    expect(threw).toBe(true);
    // Floored to MIN_QUERY_EMBED_BUDGET_MS (2s) — NOT a fresh 6s (would blow the
    // cached-path total past the 10s force-exit) and NOT ~0 (would starve a
    // healthy inner embed). So: rejects after ~2s, comfortably under 6s.
    expect(elapsed).toBeGreaterThanOrEqual(1800);
    expect(elapsed).toBeLessThan(3500);
  });

  test('an already-aborted shared signal does not starve a healthy embed', async () => {
    const vec = Array.from({ length: 1024 }, () => 0.2);
    const seen: boolean[] = [];
    __setEmbedTransportForTests(async (opts) => {
      seen.push(Boolean(opts.abortSignal?.aborted));
      await new Promise(resolve => setTimeout(resolve, 25));
      return { embeddings: [vec], usage: { tokens: 1 } } as any;
    });

    const dl = { signal: AbortSignal.abort(), deadlineAt: Date.now() - 5 };
    const out = await embedQueryBounded('q', undefined, dl);

    expect(out).toBeInstanceOf(Float32Array);
    expect(out.length).toBe(1024);
    expect(seen).toEqual([false]);
  });

  test('resolves with the embedding when the transport returns in time', async () => {
    const vec = Array.from({ length: 1024 }, () => 0.1);
    __setEmbedTransportForTests(async () => ({ embeddings: [vec], usage: { tokens: 1 } }) as any);
    const dl = makeQueryEmbedDeadline(2000);
    const out = await embedQueryBounded('q', undefined, dl);
    expect(out).toBeInstanceOf(Float32Array);
    expect(out.length).toBe(1024);
  });
});
