import type { IStoreSession } from '../../../__generated__/schema'
import type { OrderForm } from '../clients/commerce/types/OrderForm'

export const getAddressOrderForm = (
  orderForm: OrderForm,
  session: IStoreSession,
  addressChanged: boolean
) => {
  const postalCode = session.postalCode
  const geoCoordinates = session.geoCoordinates
  const availableAddresses = orderForm?.shippingData?.availableAddresses ?? []
  const selectedAddresses = orderForm?.shippingData?.selectedAddresses ?? []
  // Validate if no change for the address was made and the deliveryMode has changed we can return the address from the orderForm
  if (!addressChanged && selectedAddresses.length > 0) {
    return [selectedAddresses[0]]
  }

  // Validate if the address from the session already exists at the availableAddresses from the OrderForm to avoid duplication
  if (addressChanged && availableAddresses.length > 0) {
    for (const address of availableAddresses) {
      if (postalCode && geoCoordinates) {
        const addressMatcher =
          address.postalCode === postalCode ||
          (address.geoCoordinates[0] === geoCoordinates.longitude &&
            address.geoCoordinates[1] === geoCoordinates.latitude)
        if (addressMatcher) {
          return [address]
        }
      }
      if (postalCode && !geoCoordinates) {
        const addressMatcher = address.postalCode === postalCode
        if (addressMatcher) {
          return [address]
        }
      }
      if (geoCoordinates && !postalCode) {
        const addressMatcher =
          address.geoCoordinates[0] === geoCoordinates.longitude &&
          address.geoCoordinates[1] === geoCoordinates.latitude
        if (addressMatcher) {
          return [address]
        }
      }
    }
  }

  return null
}