import { readFile, stat } from 'node:fs/promises';
import {
  cutover,
  nodeCutoverSystem,
  parseCutoverPlan,
  preflight,
  rollback,
} from './cutover-orchestrator.js';

const [action, planPath] = process.argv.slice(2);
if (!['preflight', 'cutover', 'rollback'].includes(action ?? '') || !planPath) {
  throw new Error('Usage: pnpm cutover <preflight|cutover|rollback> <plan.json>');
}
const planInfo = await stat(planPath);
if (!planInfo.isFile() || (planInfo.mode & 0o077) !== 0) {
  throw new Error('Cutover plan must be a regular file inaccessible to group and other users');
}
const plan = parseCutoverPlan(JSON.parse(await readFile(planPath, 'utf8')) as unknown);
const gatewayToken = process.env.MULTI_SIMADMIN_GATEWAY_TOKEN ?? '';
if (action === 'preflight') await preflight(plan, nodeCutoverSystem, gatewayToken);
else if (action === 'cutover') await cutover(plan, nodeCutoverSystem, gatewayToken);
else await rollback(plan, nodeCutoverSystem);
process.stdout.write(`${action} completed\n`);