/**
 * flow-captcha.ts — shared captcha-retry resolution for the in-repo Google Flow
 * (useapi.net) submit paths: POST /videos (R2V + omni-flash V2V), POST /images,
 * POST /voices, and POST /videos/upscale.
 *
 * The useapi Flow API auto-solves the Google reCAPTCHA when a submit body carries
 * `captchaRetry` (1-10): it "cycles through configured providers in priority
 * order" and draws on the free CapSolver credits granted with the first account
 * (300 since 2026-06-29, was 100) plus any provider keys registered via
 * POST /accounts/captcha-providers.
 * Passing it is the SUPPORTED way to ride through the intermittent
 * `403 PUBLIC_ERROR_UNUSUAL_ACTIVITY` / reCAPTCHA blocks — without it the submit
 * just fails and the caller is left to cool down and resubmit.
 *
 * The count comes from VCLAW_FLOW_CAPTCHA_RETRY (default 5), clamped to [1,10];
 * an explicit `0`/negative opts out (no field emitted), and garbage falls back to
 * the default. `captchaToken`/`captchaOrder` are intentionally NOT set — the spec
 * marks the three mutually exclusive, and `captchaRetry` is the auto-solve knob.
 */

/**
 * Default retries. useapi raised the SERVER-side default (used when a body sends
 * no captcha field at all) from 3 to 5 on 2026-06-29. Ours was 3, which meant we
 * were explicitly asking for FEWER attempts than sending nothing would have got —
 * so this tracks the server default rather than sitting below it.
 */
export const FLOW_CAPTCHA_RETRY_DEFAULT = 5;
export const FLOW_CAPTCHA_RETRY_MAX = 10;

/**
 * Resolve the captcha-retry count for a Flow submit body from the environment.
 * Returns 0 (omit the field — explicit opt-out) when VCLAW_FLOW_CAPTCHA_RETRY is
 * `0` or negative; the default when unset or unparseable; otherwise the clamped
 * value.
 */
export function resolveFlowCaptchaRetry(env: NodeJS.ProcessEnv = process.env): number {
  const raw = (env.VCLAW_FLOW_CAPTCHA_RETRY ?? '').trim();
  if (raw === '') return FLOW_CAPTCHA_RETRY_DEFAULT;
  const n = Number.parseInt(raw, 10);
  if (!Number.isFinite(n)) return FLOW_CAPTCHA_RETRY_DEFAULT;
  if (n <= 0) return 0;
  return Math.min(n, FLOW_CAPTCHA_RETRY_MAX);
}

/**
 * Set `captchaRetry` on a Flow submit body when `retry > 0` (mutates and returns
 * the body for chaining). A retry of 0 leaves the body untouched (opt-out).
 */
export function applyFlowCaptcha<T extends Record<string, unknown>>(body: T, retry: number): T {
  if (retry > 0) (body as Record<string, unknown>).captchaRetry = retry;
  return body;
}