import {z} from 'zod'

export type GetApiV1ApiProductsProductExternalIdArgs = {productExternalId: string};

export type GetApiV1ApiProductsProductExternalIdOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const link = z.object({href: z.string().optional(), method: z.string().optional(), rel: z.enum(["self", "pay", "next", "friendly"]).optional()});

export const product = z.object({_links: z.array(link).optional(), amount_hint: z.string().optional(), date_created: z.string().optional(), description: z.string().optional(), external_id: z.string().optional(), gateway_account_id: z.number().int().optional(), language: z.enum(["en", "cy"]).optional(), metadata: z.record(z.string(), z.string()).optional(), name: z.string().optional(), pay_api_token: z.string().optional(), price: z.number().int().optional(), product_name_path: z.string().optional(), reference_enabled: z.boolean().optional(), reference_hint: z.string().optional(), reference_label: z.string().optional(), require_captcha: z.boolean().optional(), return_url: z.string().optional(), service_name_path: z.string().optional(), status: z.enum(["ACTIVE", "INACTIVE"]).optional(), type: z.enum(["DEMO", "PROTOTYPE", "ADHOC", "AGENT_INITIATED_MOTO"]).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
};

/**
 * Get product by product external ID
 * 
 * GET /v1/api/products/{productExternalId}
 */
export const getApiV1ApiProductsProductExternalId = async (args: GetApiV1ApiProductsProductExternalIdArgs, options?: GetApiV1ApiProductsProductExternalIdOptions) => {
const {baseUrl = "http://products_url", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/api/products/${encodeURIComponent(String(args.productExternalId))}${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(product, await res.json())
};