"""Install API routing on the existing Iran ReelBox HTTPS server."""
from datetime import datetime, timezone
from pathlib import Path
import shutil
import subprocess

config = Path('/etc/reelbox/nginx.conf')
original = config.read_text()
include = '        include /etc/reelbox/api-locations.conf;\n'
if include not in original:
    anchor = '        root /var/www/reelbox/current;\n'
    if original.count(anchor) != 1:
        raise RuntimeError('Unexpected site configuration; refusing to alter it')
    backup = config.with_name('nginx.conf.' + datetime.now(timezone.utc).strftime('%Y%m%dT%H%M%SZ') + '.backup')
    shutil.copy2(config, backup)
    config.write_text(original.replace(anchor, include + anchor))
    try:
        subprocess.run(['/usr/sbin/nginx', '-t', '-c', str(config)], check=True)
    except Exception:
        config.write_text(original)
        raise
subprocess.run(['systemctl', 'reload', 'reelbox-web'], check=True)
print('ReelBox metadata API routes enabled; website root and existing listeners unchanged')