import { PAYPAL_PARTNER_ATTRIBUTION_ID } from "../utils/partner"

/**
 * The seller nonce the hosted partner service (`partnerServiceUrl`) embeds in
 * every partner-referral it creates. The onboarding token exchange sends it as
 * the PKCE `code_verifier`, so it MUST equal the value the referral was minted
 * with — the link request does not send a nonce, so a locally generated one
 * makes every exchange fail with invalid_grant. It is not a secret: the
 * single-use authCode and sharedId are what protect the exchange.
 * Only override PAYPAL_SELLER_NONCE together with your own partner service.
 */
export const PARTNER_SELLER_NONCE =
  "a1233wtergfsdt4365tzrshgfbaewa36AGa1233wtergfsdt4365tzrshgfbaewa36AG"

/** Partner-level configuration, resolved from env vars with built-in defaults. */
export type PayPalModuleConfig = {
  partnerServiceUrl: string
  partnerJsUrl: string
  backendUrl: string
  sellerNonce: string
  bnCode?: string
  partnerMerchantIdSandbox: string
  partnerMerchantIdLive: string
  alertWebhookUrls?: string[]
}

const STATIC_CFG: PayPalModuleConfig = {
  partnerServiceUrl:
    "https://mbjtechnolabs.com/ppcp-seller-onboarding/seller-onboarding.php?from=medusa",
  partnerJsUrl:
    "https://www.paypal.com/webapps/merchantboarding/js/lib/lightbox/partner.js",
  backendUrl: "http://localhost:9000",
  sellerNonce: PARTNER_SELLER_NONCE,
  bnCode: PAYPAL_PARTNER_ATTRIBUTION_ID,
  partnerMerchantIdSandbox: "K6QLN2LPGQRHL",
  partnerMerchantIdLive: "GT5R877JNBPLL",
  alertWebhookUrls: [],
}

/** Resolve the module configuration from the environment. */
export function getPayPalConfig(): PayPalModuleConfig {
  const backendUrl = process.env.MEDUSA_BACKEND_URL || STATIC_CFG.backendUrl

  return {
    ...STATIC_CFG,
    partnerServiceUrl:
      process.env.PAYPAL_PARTNER_SERVICE_URL || STATIC_CFG.partnerServiceUrl,
    backendUrl,
    sellerNonce: process.env.PAYPAL_SELLER_NONCE || STATIC_CFG.sellerNonce,
    partnerMerchantIdSandbox:
      process.env.PAYPAL_PARTNER_MERCHANT_ID_SANDBOX ||
      STATIC_CFG.partnerMerchantIdSandbox,
    partnerMerchantIdLive:
      process.env.PAYPAL_PARTNER_MERCHANT_ID_LIVE ||
      STATIC_CFG.partnerMerchantIdLive,
    alertWebhookUrls:
      (process.env.PAYPAL_ALERT_WEBHOOK_URLS || "")
        .split(",")
        .map((url) => url.trim())
        .filter(Boolean) || STATIC_CFG.alertWebhookUrls,
  }
}