#!/usr/bin/env node
/**
 * ─────────────────────────────────────────────
 *  SPB Drive — Personal Cloud Drive
 * ─────────────────────────────────────────────
 *  Author  : Simon-Pierre Boucher
 *  Contact : contact@spboucher.ai
 *  File    : scripts/inject-headers.mjs
 *  Purpose : Prepend the canonical author header to any tracked file missing it
 *  License : MIT © Simon-Pierre Boucher
 * ─────────────────────────────────────────────
 */

import { execSync } from 'node:child_process';
import { readFileSync, writeFileSync } from 'node:fs';

const LINES = (file, purpose) => [
  '─────────────────────────────────────────────',
  ' SPB Drive — Personal Cloud Drive',
  '─────────────────────────────────────────────',
  ' Author  : Simon-Pierre Boucher',
  ' Contact : contact@spboucher.ai',
  ` File    : ${file}`,
  ` Purpose : ${purpose}`,
  ' License : MIT © Simon-Pierre Boucher',
  '─────────────────────────────────────────────',
];

/** Comment wrappers per extension family. */
const STYLES = {
  block: (lines) => `/**\n${lines.map((l) => ` * ${l}`.trimEnd()).join('\n')}\n */\n\n`,
  hash: (lines) => `${lines.map((l) => `# ${l}`.trimEnd()).join('\n')}\n\n`,
  html: (lines) => `<!--\n${lines.map((l) => `  ${l}`.trimEnd()).join('\n')}\n-->\n\n`,
  sql: (lines) => `${lines.map((l) => `-- ${l}`.trimEnd()).join('\n')}\n\n`,
};

const EXT_STYLE = {
  '.js': 'block', '.mjs': 'block', '.cjs': 'block', '.ts': 'block',
  '.css': 'block', '.scss': 'block',
  '.py': 'hash', '.sh': 'hash', '.bash': 'hash', '.yml': 'hash', '.yaml': 'hash', '.toml': 'hash',
  '.html': 'html', '.njk': 'html', '.md': 'html',
  '.sql': 'sql',
};

const files = execSync('git ls-files', { encoding: 'utf8' }).split('\n').filter(Boolean);
let injected = 0;

for (const file of files) {
  const base = file.split('/').pop();
  const dot = base.lastIndexOf('.');
  const style = dot >= 0 ? EXT_STYLE[base.slice(dot).toLowerCase()] : null;
  if (!style) continue;
  let text;
  try { text = readFileSync(file, 'utf8'); } catch { continue; }
  if (text.slice(0, 1200).includes('contact@spboucher.ai')) continue;

  let header = STYLES[style](LINES(file, 'Part of SPB Drive'));
  let body = text;
  if (body.startsWith('#!')) {
    const nl = body.indexOf('\n') + 1;
    header = body.slice(0, nl) + header;
    body = body.slice(nl);
  }
  writeFileSync(file, header + body);
  console.log(`+ header → ${file}`);
  injected += 1;
}

console.log(injected > 0 ? `✓ Injected ${injected} header(s).` : '✓ Nothing to inject.');