import { SHOPIFY_STOREFRONT_API_URL } from '@/services/shopify/client';
import { GET_SHOP_POLICIES_QUERY } from '@/graphql/policies';

export interface ShopPolicy {
  id: string;
  title: string;
  handle: string;
  body: string;
  url: string;
}

interface ShopPoliciesResponse {
  data?: {
    shop?: Record<string, ShopPolicy | null>;
  };
}

// Handles Shopify uses for each policy — also the routes under /policies/[handle].
export const POLICY_HANDLES = [
  'terms-of-service',
  'privacy-policy',
  'refund-policy',
  'shipping-policy',
  'subscription-policy',
] as const;

// Policies change rarely, so this uses its own fetch (revalidated hourly)
// rather than the no-store `shopifyFetch` used for carts and products.
export async function getShopPolicies(): Promise<ShopPolicy[]> {
  const token = process.env.NEXT_PUBLIC_SHOPIFY_STOREFRONT_ACCESS_TOKEN;

  const response = await fetch(SHOPIFY_STOREFRONT_API_URL, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      ...(token ? { 'X-Shopify-Storefront-Access-Token': token } : {}),
    },
    body: JSON.stringify({ query: GET_SHOP_POLICIES_QUERY }),
    next: { revalidate: 3600 },
  });

  if (!response.ok) {
    console.error('Failed to load shop policies:', response.status);
    return [];
  }

  const json: ShopPoliciesResponse = await response.json();
  const shop = json.data?.shop ?? {};

  return Object.values(shop).filter((policy): policy is ShopPolicy =>
    Boolean(policy?.handle)
  );
}

export async function getShopPolicy(
  handle: string
): Promise<ShopPolicy | null> {
  const policies = await getShopPolicies();
  return policies.find((policy) => policy.handle === handle) ?? null;
}