import {z} from 'zod'

export type GetApiV3StoresStoreIdPublicCartOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const guestCartVariantItem = z.object({id: z.number().int(), type: z.literal("variant"), variant_id: z.number().int(), bundle_price_option_id: z.number().int().nullable(), quantity: z.number().int().gte(1)}).and(z.record(z.string(), z.unknown()));

export const guestCartBundlePriceOptionItem = z.object({id: z.number().int(), type: z.literal("bundle_price_option"), variant_id: z.number().int().nullable(), bundle_price_option_id: z.number().int(), bundle_price_option_slug: z.string().optional(), bundle_price_option_unique_id: z.string().optional(), quantity: z.number().int().gte(1)}).and(z.record(z.string(), z.unknown()));

export const guestCartItem = z.discriminatedUnion("type", [guestCartVariantItem, guestCartBundlePriceOptionItem]);

export const guestCart = z.object({id: z.number().int().optional(), item_count: z.number().int().optional(), total: z.union([z.string(), z.number()]).optional(), items: z.array(guestCartItem).optional()}).and(z.record(z.string(), z.unknown()));

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get the guest storefront cart
 * 
 * GET /v3/stores/{store_id}/public/cart
 */
export const getApiV3StoresStoreIdPublicCart = async (options?: GetApiV3StoresStoreIdPublicCartOptions) => {
const {baseUrl = "https://api.scalev.com", fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

const url = `${baseUrl.replace(/\/+$/, '')}/v3/stores/${encodeURIComponent(String(args.store_id))}/public/cart${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(guestCart, await res.json())
};