import {z} from 'zod'

export type GetApiImagesSearchArgs = {term: string, limit?: number | undefined, filters?: string | undefined};

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

export const getApiImagesSearchResponse = z.array(z.object({description: z.string().optional(), is_official: z.boolean().optional(), is_automated: z.boolean().optional(), name: z.string().optional(), star_count: z.number().int().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 images
 * 
 * GET /images/search
 */
export const getApiImagesSearch = async (args: GetApiImagesSearchArgs, options: GetApiImagesSearchOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.term != null) query.append("term", String(args.term))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.filters != null) query.append("filters", String(args.filters))

const url = `${baseUrl.replace(/\/+$/, '')}/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(getApiImagesSearchResponse, await res.json())
};