const usage = await owo.billing.usage({ customer: "user_123" });

console.log("Currency:", usage.currency);
console.log("Total estimated:", usage.totalEstimated);

for (const feature of usage.features) {
  console.log(feature.featureSlug, feature.overageUnits, "units @", feature.overagePrice);
}

interface BillingUsageResult {
  customer: string;
  currency: string;
  totalEstimated: number;
  features: BillingFeatureUsage[];
}

interface BillingFeatureUsage {
  featureSlug: string;
  featureName: string;
  overageUnits: number;
  overagePrice: number;
  estimatedCost: number;
}

const result = await owo.billing.invoice({ customer: "user_123" });

console.log("Invoice:", result.invoice.number);
console.log("Total:", result.invoice.total);
console.log("Status:", result.invoice.status);

interface InvoiceResult {
  success: boolean;
  invoice: Invoice;
}

interface Invoice {
  id: string;
  number: string;
  customerId: string;
  status: "draft" | "open" | "paid" | "void";
  currency: string;
  subtotal: number;
  tax: number;
  total: number;
  lineItems: InvoiceLineItem[];
  createdAt: number;
  paidAt?: number;
}

interface InvoiceLineItem {
  featureSlug: string;
  featureName: string;
  quantity: number;
  unitPrice: number;
  amount: number;
}

const result = await owo.billing.invoices({ customer: "user_123" });

for (const inv of result.invoices) {
  console.log(inv.number, inv.status, inv.total);
}

interface InvoicesResult {
  invoices: Invoice[];
}