const apiBase = import.meta.env.VITE_API_URL || "";

async function request(path, options = {}) {
  const resp = await fetch(`${apiBase}${path}`, {
    headers: { "Content-Type": "application/json" },
    ...options,
  });
  if (!resp.ok) throw new Error(`${resp.status} ${resp.statusText}`);
  if (resp.status === 204) return null;
  return resp.json();
}

export const api = {
  listCustomers: () => request("/api/customers"),
  createCustomer: (data) =>
    request("/api/customers", { method: "POST", body: JSON.stringify(data) }),
  deleteCustomer: (id) => request(`/api/customers/${id}`, { method: "DELETE" }),

  listInvoices: (params = {}) => {
    const qs = new URLSearchParams(params).toString();
    return request(`/api/invoices${qs ? "?" + qs : ""}`);
  },
  getInvoice: (id) => request(`/api/invoices/${id}`),
  createInvoice: (data) =>
    request("/api/invoices", { method: "POST", body: JSON.stringify(data) }),
  deleteInvoice: (id) => request(`/api/invoices/${id}`, { method: "DELETE" }),

  addLineItem: (invoiceId, data) =>
    request(`/api/line-items/invoices/${invoiceId}`, {
      method: "POST",
      body: JSON.stringify(data),
    }),
  deleteLineItem: (id) =>
    request(`/api/line-items/${id}`, { method: "DELETE" }),

  recordPayment: (invoiceId, data) =>
    request(`/api/payments/invoices/${invoiceId}`, {
      method: "POST",
      body: JSON.stringify(data),
    }),
  deletePayment: (id) => request(`/api/payments/${id}`, { method: "DELETE" }),
};