import {z} from 'zod'

export type GetApi10CommerceInventoryArgs = {cursor?: string | undefined, Authorization: string, 'User-Agent': string};

export type GetApi10CommerceInventoryOptions = {baseUrl?: string | undefined, Authorization?: string | undefined, fetch?: typeof fetch | undefined};

export const inventoryItem = z.object({descriptor: z.string().optional(), isUnlimited: z.boolean().optional(), quantity: z.number().int().optional(), sku: z.string().optional(), variantId: z.string().optional()});

export const paginatedInventoryItemListResponse = z.object({inventory: z.array(inventoryItem).optional(), pagination: z.object({hasNextPage: z.boolean().optional(), nextPageCursor: z.string().optional(), nextPageUrl: z.string().optional()}).optional()});

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
};

/**
 * List inventory
 * 
 * GET /1.0/commerce/inventory
 */
export const getApi10CommerceInventory = async (args: GetApi10CommerceInventoryArgs, options?: GetApi10CommerceInventoryOptions) => {
const {baseUrl = "https://api.squarespace.com", fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args['User-Agent'] != null) headers.set("User-Agent", String(args['User-Agent']))
if (Authorization !== undefined) headers.set('authorization', `Bearer ${Authorization}`)

const url = `${baseUrl.replace(/\/+$/, '')}/1.0/commerce/inventory${query.size > 0 ? `?${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(paginatedInventoryItemListResponse, await res.json())
};