// @ts-expect-error — plain .mjs script with no .d.ts; import as JS module.
import { checkParity } from '../../scripts/i18n-parity.mjs';

import { describe, it, expect } from 'vitest';

/**
 * Enforces the file-set contract for the i18n migration: every non-en locale
 * dir must contain the exact same domain files as en/.
 *
 * Key-set drift is intentionally NOT enforced here — translation work happens
 * gradually and gating CI on every newly-added EN key would block feature
 * merges. The CLI script still prints the key-drift report so translators can
 * see what they owe; only file-level drift is a structural bug.
 */
describe('i18n parity', () => {
  it('every locale has the same domain files as en', () => {
    const report = checkParity();
    expect(report.fileDrift).toEqual([]);
  });

  it('reports key drift as data (not enforced, used by the CLI tool)', () => {
    const report = checkParity();
    // We do not assert here — translation drift is expected and acceptable.
    // The shape check just confirms the report contract for tooling consumers.
    expect(Array.isArray(report.keyDrift)).toBe(true);
    for (const entry of report.keyDrift) {
      expect(typeof entry.locale).toBe('string');
      expect(typeof entry.file).toBe('string');
      expect(Array.isArray(entry.missing)).toBe(true);
      expect(Array.isArray(entry.extra)).toBe(true);
    }
  });
});