/**
 * Payment API — talks to targo-hub /payments/* endpoints
 */
const HUB = location.hostname === 'localhost' ? 'http://localhost:3300' : 'https://msg.gigafibre.ca'

async function hubGet (path) {
  const r = await fetch(HUB + path)
  if (!r.ok) {
    const data = await r.json().catch(() => ({}))
    throw new Error(data.error || `Hub ${r.status}`)
  }
  return r.json()
}

async function hubPost (path, body) {
  const r = await fetch(HUB + path, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(body),
  })
  const data = await r.json().catch(() => ({}))
  if (!r.ok) throw new Error(data.error || `Hub ${r.status}`)
  return data
}

/** Get customer balance + unpaid invoices */
export const getBalance = (customer) => hubGet(`/payments/balance/${encodeURIComponent(customer)}`)

/** Get saved payment methods for customer */
export const getPaymentMethods = (customer) => hubGet(`/payments/methods/${encodeURIComponent(customer)}`)

/** Get invoice payment info */
export const getInvoicePaymentInfo = (invoice) => hubGet(`/payments/invoice/${encodeURIComponent(invoice)}`)

/** Create checkout session for full balance */
export const checkoutBalance = (customer) => hubPost('/payments/checkout', { customer })

/** Create checkout session for specific invoice */
export const checkoutInvoice = (customer, invoice, { save_card = true, payment_method = 'card' } = {}) =>
  hubPost('/payments/checkout-invoice', { customer, invoice, save_card, payment_method })

/** Save card (setup mode) */
export const setupCard = (customer) => hubPost('/payments/setup', { customer })

/** Open Stripe billing portal */
export const openBillingPortal = (customer) => hubPost('/payments/portal', { customer })

/** Toggle auto-pay (PPA) */
export const togglePPA = (customer, enabled) => hubPost('/payments/toggle-ppa', { customer, enabled })