import { DriptabClient } from '@dotlabshq/driptab-sdk';

const client = new DriptabClient({
  token:     process.env.DRIPTAB_TOKEN!,
  projectId: process.env.DRIPTAB_PROJECT_ID!,
});

// Onboard a user on the free plan
const { customer, subscription } = await client.customers.getOrCreate(
  { external_id: user.id, name: user.name, email: user.email },
  { plan: 'starter' },
);

// Check limits locally — no extra API call
const limits = client.limits({
  starter: { mail_out: 100,  storage_gb: 1,   domains: 1   },
  pro:     { mail_out: 5000, storage_gb: 10,  domains: 10  },
  agent:   { mail_out: null, storage_gb: null, domains: null },
});

const result = limits.check(subscription!.plan_code, 'mail_out', user.mailCount);
if (!result.allowed) throw new Error('Limit reached. Please upgrade.');

// After payment — upgrade plan
const proPlan = await client.plans.getByCode('pro');
await client.subscriptions.changePlan(subscription!.id, proPlan!.id);