import {z} from 'zod'

export type CreateApiGoogleSearchProductsArgs = {body: {query: string, country_code?: string | undefined, page?: number | undefined, per_page?: number | undefined, sort_by?: ('best_match' | 'top_rated' | 'lowest_price' | 'highest_price') | undefined, product_condition?: ('any' | 'new' | 'used' | 'refurbished') | undefined}};

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

export const googleProduct = z.object({product_id: z.string().optional(), title: z.string().optional(), description: z.string().nullable().optional(), photos: z.array(z.string()).optional(), attributes: z.record(z.string(), z.string()).nullable().optional(), rating: z.number().nullable().optional(), page_url: z.string().optional(), num_reviews: z.number().int().nullable().optional(), reviews_per_rating: z.record(z.string(), z.number().int()).optional(), product_details: z.record(z.string(), z.string()).optional(), product_specs: z.record(z.string(), z.string()).optional()});

export const createApiGoogleSearchProductsResponse = z.object({products: z.array(googleProduct).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
};

/**
 * Search products on Google
 * 
 * POST /google/search-products
 */
export const createApiGoogleSearchProducts = async (args: CreateApiGoogleSearchProductsArgs, options?: CreateApiGoogleSearchProductsOptions) => {
const {baseUrl = "https://api.exfunc.dev", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/google/search-products${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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