#!/usr/bin/env node
// coord - SessionStart hook: inject this repo's pending coordination inbox
// (directed messages + unseen broadcasts) as additionalContext.
//
// Thin Node wrapper (marketplace convention: hooks are .mjs) around the bash
// engine scripts/coord-inbox.sh, which owns the mailbox semantics and is
// covered by scripts/coord-selftest.sh. Zero dependencies. Always exits 0 -
// a broken mailbox must never block a session.

import { execFileSync } from 'node:child_process';
import { basename, dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

function emit(context) {
  const out = { continue: true };
  if (context) {
    out.hookSpecificOutput = { hookEventName: 'SessionStart', additionalContext: context };
  }
  process.stdout.write(JSON.stringify(out) + '\n');
}

try {
  const pluginRoot = process.env.CLAUDE_PLUGIN_ROOT
    || join(dirname(fileURLToPath(import.meta.url)), '..', '..');

  let repoRoot = '';
  try {
    repoRoot = execFileSync('git', ['rev-parse', '--show-toplevel'],
      { stdio: ['ignore', 'pipe', 'ignore'], encoding: 'utf8' }).trim();
  } catch {
    // not a git repo: fall back to the working directory below
  }
  if (!repoRoot) repoRoot = process.cwd();

  const inbox = execFileSync('bash',
    [join(pluginRoot, 'scripts', 'coord-inbox.sh'), '--repo', basename(repoRoot)],
    { stdio: ['ignore', 'pipe', 'ignore'], encoding: 'utf8' });

  emit(inbox.trim() ? '== Repo coordination (unread messages) ==\n' + inbox : '');
} catch {
  emit('');
}