import { spawnSync } from 'node:child_process';
import { readFile, stat } from 'node:fs/promises';
import path from 'node:path';
import { fail, pass, repositoryRoot, sha256 } from './lib.mjs';

const contractRoot = path.join(repositoryRoot, 'contracts', 'phase9');
const manifestPath = path.join(contractRoot, 'PACKAGE_MANIFEST_v1.0.json');
const manifest = JSON.parse(await readFile(manifestPath, 'utf8'));
const errors = [];

if (manifest.file_count !== manifest.files.length) {
  errors.push(
    `Manifest count ${manifest.file_count} differs from ${manifest.files.length} entries.`,
  );
}

for (const entry of manifest.files) {
  const filePath = path.join(contractRoot, entry.path);
  try {
    const details = await stat(filePath);
    if (details.size !== entry.bytes) errors.push(`${entry.path}: byte count changed.`);
    if ((await sha256(filePath)) !== entry.sha256) errors.push(`${entry.path}: checksum changed.`);
  } catch {
    errors.push(`${entry.path}: missing.`);
  }
}

const validator = spawnSync(
  process.execPath,
  [path.join(contractRoot, 'qa', 'validate-phase9-package_v1.0.mjs'), contractRoot],
  { encoding: 'utf8' },
);
if (validator.status !== 0) {
  errors.push(`Phase 9 validator failed: ${validator.stderr || validator.stdout}`);
}

if (errors.length > 0) fail(errors);
else
  pass(
    `Phase 9 contract package is immutable and ${manifest.files.length} payload checksums match.`,
  );