// STATIC GUARD: prod source must pass eslint with zero errors/warnings.
// Scans App.js + storage adapters + shared modules. Catches unused imports,
// dead code, undefined vars before they hit the browser console.
// Run via: npx eslint <files> --format json -> parse -> fail on any problem.
const { execSync } = require('child_process');
const path = require('path');

const ROOT = path.resolve(__dirname, '..', '..');

const TARGETS = [
  'src/App.js',
  'src/storage/contract.js',
  'src/storage/firebase.js',
  'src/storage/index.js',
  'src/storage/server.js',
  'shared/index.js',
  'shared/logEvent.js',
  'shared/turn.js',
];

function runEslint(files) {
  const abs = files.map(f => `"${path.join(ROOT, f)}"`).join(' ');
  // execSync throws on non-zero exit (eslint returns 1 when problems found).
  // Capture stdout regardless.
  let stdout;
  try {
    stdout = execSync(`npx eslint ${abs} --format json`, {
      encoding: 'utf8',
      cwd: ROOT,
      stdio: ['pipe', 'pipe', 'pipe'],
    });
  } catch (err) {
    stdout = err.stdout || '';
  }
  return JSON.parse(stdout || '[]');
}

describe('static guard: eslint clean on prod source', () => {
  test('zero eslint errors or warnings', () => {
    const results = runEslint(TARGETS);
    const problems = [];
    let totalErrors = 0;
    let totalWarnings = 0;
    for (const file of results) {
      totalErrors += file.errorCount;
      totalWarnings += file.warningCount;
      for (const msg of file.messages) {
        problems.push(`  ${path.relative(ROOT, file.filePath)}:${msg.line}:${msg.column} ${msg.ruleId} — ${msg.message}`);
      }
    }
    if (totalErrors + totalWarnings > 0) {
      const summary = `eslint found ${totalErrors} error(s), ${totalWarnings} warning(s):\n${problems.join('\n')}`;
      throw new Error(summary);
    }
  }, 30000); // eslint spawn can be slow
});