// Store lists lag right after a create: App Store Connect's /inAppPurchasesV2 (and Play's oneTimeProducts list) can
// leave out a product created a minute ago. A command that walks the store's list then silently skips it. These
// helpers compare the config's product ids with what the store returned, so the gap is said out loud
// (docs/pitfalls.md, "Store lists lag right after create").
import { warn } from './log';

export const LAG_HINT = "the store's list can lag a minute after creating; re-run";

/** Config ids the store's list does not contain, in config order. Pure. */
export function missingFromStore(want: string[], got: Iterable<string>): string[] {
  const have = new Set(got);
  return [...new Set(want)].filter(id => !have.has(id));
}

/**
 * Warns with the missing ids and the lag hint. `fail` sets a non-zero exit code (the command could not do its job for
 * them, e.g. a dry-run plan that would skip them). Returns the missing ids.
 */
export function reportMissing(tag: string, what: string, want: string[], got: Iterable<string>, o: { fail: boolean }): string[] {
  const missing = missingFromStore(want, got);
  if (!missing.length) return missing;
  warn(tag, `${missing.length} of ${want.length} ${what} not in the store's list: ${missing.join(', ')} (${LAG_HINT})`);
  if (o.fail) process.exitCode = 1;
  return missing;
}