import {z} from 'zod'

export type GetApiV1GoogleShoppingProductArgs = {product_id: string, gl?: string | undefined, hl?: string | undefined};

export type GetApiV1GoogleShoppingProductOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const shoppingSeller = z.object({name: z.string(), link: z.string().nullable().optional(), logo: z.string().nullable().optional(), price: z.number().nullable().optional(), original_price: z.number().nullable().optional(), shipping: z.string().nullable().optional(), tax: z.string().nullable().optional(), total_cost: z.number().nullable().optional(), rating: z.number().nullable().optional(), reviews_count: z.number().int().nullable().optional()});

export const shoppingProductDetail = z.object({title: z.string(), description: z.string().nullable().optional(), brand: z.string().nullable().optional(), rating: z.number().nullable().optional(), reviews_count: z.number().int().nullable().optional(), price_range_low: z.number().nullable().optional(), price_range_high: z.number().nullable().optional(), currency: z.string().nullable().optional(), sellers: z.array(shoppingSeller).optional(), specs: z.record(z.string(), z.string()).optional(), images: z.array(z.string()).optional()});

export const shoppingProductResponse = z.object({product: shoppingProductDetail});

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
};

/**
 * Product details
 * 
 * GET /v1/google/shopping/product
 */
export const getApiV1GoogleShoppingProduct = async (args: GetApiV1GoogleShoppingProductArgs, options?: GetApiV1GoogleShoppingProductOptions) => {
const {baseUrl = "https://scrapebadger.com", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.product_id != null) query.append("product_id", String(args.product_id))
if (args.gl != null) query.append("gl", String(args.gl))
if (args.hl != null) query.append("hl", String(args.hl))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/google/shopping/product${query.size > 0 ? `?${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(shoppingProductResponse, await res.json())
};