/*
  Give a credential to every commander that predates them.

  A commander created before `credential.ts` existed has no `officer.env` and no key row, so it cannot
  reach the platform at all — which is the state that made the first one curl the whisper container
  directly. Deleting and recreating it would fix that and throw away the conversation, which is the one
  thing a commander is: a long-running agreement about a job.

  So this is additive and re-runnable:

  - a commander that already has `officer.env` is left alone, whole;
  - `CLAUDE.md` is APPENDED to, never rewritten — it is a living document its commander has been
    extending, and the whole point of not recreating it is that it survives;
  - the key is named `commander:<dirName>`, so it revokes with the commander like any other.

  Run it after a deploy that introduces credentials, on each host:

      bun run --env-file=.env scripts/backfill-commander-credentials.ts
*/
import { readFileSync, existsSync, appendFileSync, chmodSync } from 'node:fs';
import { join } from 'node:path';
import { getUsers, listCommandHqSessions } from 'officerdb';
import { writeCommanderCredential, commanderEnvPath } from '../src/servers/api/command-hq/credential';
import { credentialSection, notifySection } from '../src/servers/api/command-hq/directory';
import { getCommanderDir } from '../src/servers/data-path';
import { lookupOsUser } from '../src/servers/os-user';

/** Best effort, and only for a member: the owner already owns everything under DATA_PATH. */
async function giveToAccount(osUser: string | null, path: string): Promise<void> {
  if (!osUser) return;
  const ids = await lookupOsUser(osUser);
  if (!ids) return;
  Bun.spawnSync(['sudo', '-n', 'chown', `${ids.uid}:${ids.gid}`, path]);
}

// Per user, because `listCommandHqSessions` is scoped by one — which is the right shape everywhere else
// and only awkward here. There are few accounts and few commanders; this runs once per deploy.
const rows: Array<{
  dirName: string | null;
  name: string | null;
  userId: number;
  email: string;
  osUser: string | null;
}> = [];
for (const user of await getUsers()) {
  for (const row of await listCommandHqSessions(user.id)) {
    rows.push({ dirName: row.dirName, name: row.name, userId: user.id, email: user.email, osUser: user.osUser });
  }
}

if (rows.length === 0) console.log('no commanders on this host');

for (const row of rows) {
  const label = `${row.dirName} (${row.name})`;

  if (!row.dirName) {
    console.log(`skip  ${label} — no directory name`);
    continue;
  }

  const dir = getCommanderDir(row.email, row.dirName);
  if (!existsSync(dir)) {
    console.log(`skip  ${label} — no directory on disk`);
    continue;
  }

  /*
    AGENTS.md where it exists, CLAUDE.md where it does not.

    Since 2026-08-27 a commander's brief is written as AGENTS.md with a CLAUDE.md pointing at it, because
    opencode discovers only the first name. Commanders created BEFORE that have the content in CLAUDE.md
    and no AGENTS.md at all. Appending to the wrong one is the quiet failure this avoids: on a new
    commander it would bury a credential section inside a six-line pointer the agent never reads.
  */
  const brief = existsSync(join(dir, 'AGENTS.md')) ? join(dir, 'AGENTS.md') : join(dir, 'CLAUDE.md');

  /**
   * Append a section only when it is not already described.
   *
   * The marker is a string the section itself contains, so a commander whose CLAUDE.md was hand-edited to
   * describe the same thing does not end up with it twice.
   */
  const appendIfMissing = async (marker: string, lines: string[]): Promise<boolean> => {
    const existing = existsSync(brief) ? readFileSync(brief, 'utf8') : '';
    if (existing.includes(marker)) return false;
    appendFileSync(brief, `\n${lines.join('\n')}`);
    await giveToAccount(row.osUser, brief);
    return true;
  };

  const envPath = commanderEnvPath(row.email, row.dirName);

  if (!existsSync(envPath)) {
    const { path } = await writeCommanderCredential({ userId: row.userId, email: row.email, dirName: row.dirName });
    chmodSync(path, 0o600);
    await giveToAccount(row.osUser, path);
    await appendIfMissing('officer.env', credentialSection(path));
    console.log(`MINT  ${label} — ${path}`);
  } else {
    console.log(`ok    ${label} — already has a credential`);
  }

  /*
    Separately, because it arrived later and the commanders that need it most already have a credential.
    Without it a commander does not know Officer HAS a notification route, so it reaches for whatever its
    harness offers — a different channel, with its own rules about when it may interrupt.
  */
  if (await appendIfMissing('/api/notify/_officer/notify', notifySection())) {
    console.log(`NOTIFY ${label} — told how to reach the owner`);
  }
}

process.exit(0);