/**
 * Placeholder-image guard tests (offline — no network).
 *
 * Contract under test (src/lib/ingest/image-guard.ts):
 *  - the ONE shared Google-branded tile observed in production (exact URL
 *    from the 2026-08-18 finance/maple cleanup, lh3.googleusercontent.com
 *    /J6_coFbogxh...) is ALWAYS blocked, in every variant (resize suffixes,
 *    host rotation lh2/lh3/lh4, case, extra query strings)
 *  - real publisher article photos on googleusercontent-lookalike or normal
 *    publisher hosts are NEVER blocked (must-pass: false positives here
 *    would strip legitimate images)
 *
 * Runner: `tsx tests/image-guard.test.ts` -> exit 1 on failure.
 */
import assert from 'node:assert/strict';

import { isPlaceholderImage } from '@/lib/ingest/image-guard';

let passed = 0;
let failed = 0;

function check(name: string, fn: () => void): void {
  try {
    fn();
    passed += 1;
    console.log(`ok ${passed} - ${name}`);
  } catch (e) {
    failed += 1;
    console.error(`not ok ${passed + failed} - ${name}`);
    console.error(String((e as Error).stack ?? e));
  }
}

// The exact shared tile URL stored on 601 production rows (2026-08-18).
const TILE =
  'https://lh3.googleusercontent.com/J6_coFbogxhRI9iM864NL_liGXvsQp2Aups' +
  'Kei7z0cNNfDvGUmWUy20nuUhkREQyrpY4bEeIBuc=s0-w300';

check('MUST-BLOCK: exact prod shared tile url', () => {
  assert.equal(isPlaceholderImage(TILE).blocked, true);
});
check('MUST-BLOCK: -rw resize variant', () => {
  assert.equal(isPlaceholderImage(`${TILE}-rw`).blocked, true);
});
check('MUST-BLOCK: lh4 host rotation', () => {
  assert.equal(isPlaceholderImage('https://lh4.googleusercontent.com/xyz123=s900').blocked, true);
});
check('MUST-BLOCK: lh2 host rotation', () => {
  assert.equal(isPlaceholderImage('https://lh2.googleusercontent.com/xyz123').blocked, true);
});
check('MUST-BLOCK: uppercase host', () => {
  assert.equal(isPlaceholderImage('https://LH3.GOOGLEUSERCONTENT.COM/J6_coFbo=s0').blocked, true);
});
check('MUST-BLOCK: extra query string / fragment', () => {
  assert.equal(isPlaceholderImage(TILE + '&dummy=1#f').blocked, true);
});
check('MUST-BLOCK: unknown key (not the known tile) still blocked by host rule', () => {
  assert.equal(
    isPlaceholderImage('https://lh3.googleusercontent.com/someOtherKeyWq9aB=s64').blocked,
    true,
  );
});
check('MUST-BLOCK: whitespace-wrapped url', () => {
  assert.equal(isPlaceholderImage(`  ${TILE}  `).blocked, true);
});

check('MUST-PASS: wired photo (publisher CDN)', () => {
  assert.equal(
    isPlaceholderImage('https://media.wired.com/photos/6a84a2c1/191:100/w_1280/c_limit/x.jpg').blocked,
    false,
  );
});
check('MUST-PASS: cnbcfm photo (publisher CDN)', () => {
  assert.equal(isPlaceholderImage('https://media.cnbcfm.com/i/2026/08/robo.jpg').blocked, false);
});
check('MUST-PASS: google.com logo asset (NOT googleusercontent)', () => {
  assert.equal(isPlaceholderImage('https://www.google.com/logos/2026/xx512.png').blocked, false);
});
check('MUST-PASS: example.com path segment merely containing the host string', () => {
  assert.equal(
    isPlaceholderImage('https://cdn.example.com/googleusercontent.com/img.png').blocked,
    false,
  );
});
check('MUST-PASS: null', () => {
  assert.equal(isPlaceholderImage(null).blocked, false);
});
check('MUST-PASS: undefined', () => {
  assert.equal(isPlaceholderImage(undefined).blocked, false);
});
check('MUST-PASS: empty string', () => {
  assert.equal(isPlaceholderImage('').blocked, false);
});
check('MUST-PASS: not a URL', () => {
  assert.equal(isPlaceholderImage('not a url').blocked, false);
});

console.log(`\nimage-guard: ${passed} passed, ${failed} failed`);
if (failed > 0) process.exit(1);