import { createHash } from 'node:crypto';
import { readFile, readdir, stat, writeFile } from 'node:fs/promises';
import path from 'node:path';

const root = path.resolve(import.meta.dirname, '..');
const manifestPath = path.join(root, 'PHASE_13_PACKAGE_MANIFEST_v1.0.json');
const excludedDirectories = new Set([
  '.git',
  '.next',
  'node_modules',
  'coverage',
  'playwright-report',
  'test-results',
]);
const excludedFiles = new Set([
  'PHASE_13_PACKAGE_MANIFEST_v1.0.json',
  'package-lock.json',
  'tsconfig.tsbuildinfo',
]);

async function walk(directory) {
  const files = [];
  for (const entry of await readdir(directory, { withFileTypes: true })) {
    if (entry.isDirectory() && excludedDirectories.has(entry.name)) continue;
    const fullPath = path.join(directory, entry.name);
    if (entry.isDirectory()) files.push(...(await walk(fullPath)));
    else {
      const relative = path.relative(root, fullPath).split(path.sep).join('/');
      if (!excludedFiles.has(relative)) files.push({ fullPath, relative });
    }
  }
  return files;
}

const files = (await walk(root)).sort((a, b) => a.relative.localeCompare(b.relative));
const entries = [];
for (const file of files) {
  const contents = await readFile(file.fullPath);
  const details = await stat(file.fullPath);
  entries.push({
    path: file.relative,
    bytes: details.size,
    sha256: createHash('sha256').update(contents).digest('hex'),
  });
}
const manifest = {
  schema_version: '1.0',
  project: 'RentalDriveGo',
  phase: 13,
  generated_at: '2026-06-25',
  excludes: [...excludedDirectories, ...excludedFiles],
  file_count: entries.length,
  files: entries,
};
await writeFile(manifestPath, `${JSON.stringify(manifest, null, 2)}\n`);
console.log(`Generated Phase 13 manifest for ${entries.length} files.`);