import { createBillingCatalog } from './billing-catalog.ts'
import { PLAN_PRICE_KRW } from './core-contract.generated.ts'

function assert(condition: unknown, message: string): asserts condition {
  if (!condition) throw new Error(message)
}

Deno.test('catalog exposes only configured Payple prices and never invents a fallback', () => {
  const catalog = createBillingCatalog({
    payple: { pro: PLAN_PRICE_KRW.pro, pro_plus: PLAN_PRICE_KRW.pro_plus },
  })
  assert(
    catalog.plans.every((plan) => plan.prices.length === 1 && plan.prices[0].provider === 'payple'),
    'each paid plan must expose exactly one Payple price',
  )
  assert(
    catalog.plans[0].prices[0].unit_amount === PLAN_PRICE_KRW.pro
      && catalog.plans[1].prices[0].unit_amount === PLAN_PRICE_KRW.pro_plus,
    'Payple prices must come from the core plan catalog',
  )
  assert(
    catalog.plans.every((plan) => plan.prices[0].currency === 'KRW' && plan.prices[0].interval === 'month'),
    'Payple prices are monthly KRW',
  )

  const unavailable = createBillingCatalog({})
  assert(unavailable.plans.every((plan) => plan.prices.length === 0), 'missing configuration must stay unavailable')
})

Deno.test('catalog rejects non-positive or non-integer Payple amounts', () => {
  const catalog = createBillingCatalog({ payple: { pro: 0, pro_plus: 1.5 } })
  assert(catalog.plans.every((plan) => plan.prices.length === 0), 'invalid amounts must fail closed')
})