#!/usr/bin/env bun
/**
 * `bun run doctor` — check the invariants that provisioning cannot check for itself.
 *
 * ── Why ──
 *
 * Every step in `provisionOsAccount` is deliberately non-fatal, so "nothing reported an error" is much
 * weaker than it sounds. The 2026-08-19 case: a fresh server, an Admin granted files, chat and terminal,
 * every named ACL entry correct, provisioning clean — and the account reached nothing, because a later
 * `chmod 700` had recomputed the ACL mask to `---`. It was found by a person, three days and one
 * confusing UI message later.
 *
 * This is the same posture as `assertPermissionTotality`: state the invariant, verify it, name the fix.
 * The difference is that this reports rather than refusing to boot — a broken member must not stop the
 * platform serving everyone else.
 *
 * Read-only. It changes nothing, so it is safe on a production box.
 *
 * Exit 1 if anything is wrong, so it can gate the end of a setup run.
 */
import { getUsers, getAllRoleGrants, OWNER_USER_ID } from 'officerdb';
import { checkOsAccount } from '../src/servers/os-user-verify';
import { PERMISSIONS } from '../src/servers/permissions/registry';

const red = (s: string) => `\x1b[31m${s}\x1b[0m`;
const green = (s: string) => `\x1b[32m${s}\x1b[0m`;
const dim = (s: string) => `\x1b[2m${s}\x1b[0m`;

let problems = 0;
const fail = (what: string, fix: string) => {
  problems++;
  console.log(`${red('✗')} ${what}`);
  console.log(`  ${dim(fix)}`);
};
const pass = (what: string) => console.log(`${green('✓')} ${what}`);

console.log('\n── Runtime ──\n');

/**
 * bun is deliberately held at a series — `BUN_SERIES` in
 * scripts/setup/machine-setup/lib/dev.sh — while 1.4 is watched for a while.
 *
 * The setup script can pin the INSTALL and nothing more. `bun upgrade` takes no version
 * argument (it offers latest-stable or --canary and nothing else), so it always jumps to the
 * newest release and walks a pinned machine off the pin without saying so. This is the only
 * thing that notices, which is why a version check sits in a script otherwise about accounts.
 *
 * The wanted series is READ from `engines.bun` rather than repeated here, because a second
 * hardcoded copy is a second thing to drift. bun does not enforce that field — verified: an
 * install declaring `engines.bun: "1.9.x"` ran clean under 1.3.14, no warning — so the field is
 * the declaration and this is the enforcement.
 */
const pkg = (await Bun.file(new URL('../package.json', import.meta.url)).json()) as {
  engines?: { bun?: string };
};
const wantSeries = (pkg.engines?.bun ?? '').replace(/\.x$/, '');
const nowSeries = Bun.version.split('.').slice(0, 2).join('.');

if (!wantSeries) {
  fail(
    'package.json declares no engines.bun',
    'The setup scripts pin a bun series and nothing else records which one. Add it.',
  );
} else if (nowSeries === wantSeries) {
  pass(`bun ${Bun.version} ${dim(`(inside the pinned ${wantSeries} series)`)}`);
} else {
  fail(
    `bun ${Bun.version} is outside the pinned ${wantSeries} series`,
    `Usually a 'bun upgrade', which always takes the newest release. Pin it back with ` +
      `'curl -fsSL https://bun.sh/install | bash -s bun-v<newest ${wantSeries}.x>', or raise ` +
      `engines.bun and BUN_SERIES together if ${nowSeries} is now wanted.`,
  );
}

console.log('\n── Accounts ──\n');

const users = await getUsers();

for (const user of users) {
  if (user.id === OWNER_USER_ID) {
    // The owner runs AS the service user, in the service user's own home. There is no Linux account to
    // check and no ACL to get wrong — `osUser: null` is correct here, not a finding.
    pass(`${user.email} ${dim('(owner — runs as the service account)')}`);
    continue;
  }

  const check = await checkOsAccount(user.email, user.osUser ?? null);
  if (check.ok) {
    pass(`${user.email} ${dim(`(${user.role}, os_user=${check.osUser}, home readable)`)}`);
  } else {
    fail(`${user.email} (${user.role}) — ${check.problem}`, `home: ${check.home}`);
  }
}

console.log('\n── Grants that cannot take effect ──\n');

// A `confined` grant is silently dropped for an account with no Linux user. That is correct behaviour and
// completely invisible: the grant is in the table, the UI shows it ticked, and it resolves to nothing.
const confinedKeys = new Set(PERMISSIONS.filter((p) => p.kind === 'confined').map((p) => p.key));
const grants = await getAllRoleGrants();
const unconfined = users.filter((u) => u.id !== OWNER_USER_ID && !u.osUser);

if (!unconfined.length) {
  pass('every non-owner account has a Linux user');
} else {
  for (const user of unconfined) {
    const dropped = grants
      .filter((g) => g.role === user.role && confinedKeys.has(g.permission))
      .map((g) => g.permission);
    if (!dropped.length) continue;
    fail(
      `${user.email} (${user.role}) holds ${dropped.join(', ')} — all dropped, because the account has no Linux user`,
      'Fix: Settings → User management → provision, or POST /api/users/<id>/provision-linux',
    );
  }
}

console.log('');
if (problems === 0) {
  console.log(green('No problems found.\n'));
  process.exit(0);
}
console.log(red(`${problems} problem${problems === 1 ? '' : 's'} found.\n`));
process.exit(1);