import {z} from 'zod'

export type GetApiV1GoogleImagesSearchArgs = {q: string, gl?: string | undefined, hl?: string | undefined, tbs?: (string | null) | undefined, imgsz?: (string | null) | undefined, imgcolor?: (string | null) | undefined, imgtype?: (string | null) | undefined, safe?: string | undefined, page?: number | undefined};

export type GetApiV1GoogleImagesSearchOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const imageResult = z.object({position: z.number().int().nullable().optional(), title: z.string().nullable().optional(), link: z.string().nullable().optional(), source: z.string().nullable().optional(), thumbnail: z.string().nullable().optional(), original: z.string().nullable().optional(), original_width: z.number().int().nullable().optional(), original_height: z.number().int().nullable().optional()});

export const imagesSearchResponse = z.object({results: z.array(imageResult).optional(), query: z.string(), language: z.string().optional(), country: z.string().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 Google Images
 * 
 * GET /v1/google/images/search
 */
export const getApiV1GoogleImagesSearch = async (args: GetApiV1GoogleImagesSearchArgs, options?: GetApiV1GoogleImagesSearchOptions) => {
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.q != null) query.append("q", String(args.q))
if (args.gl != null) query.append("gl", String(args.gl))
if (args.hl != null) query.append("hl", String(args.hl))
if (args.tbs != null) query.append("tbs", String(args.tbs))
if (args.imgsz != null) query.append("imgsz", String(args.imgsz))
if (args.imgcolor != null) query.append("imgcolor", String(args.imgcolor))
if (args.imgtype != null) query.append("imgtype", String(args.imgtype))
if (args.safe != null) query.append("safe", String(args.safe))
if (args.page != null) query.append("page", String(args.page))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

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