import {z} from 'zod'

export type GetApiV3AiImageGenerationsGenerationRequestIdArgs = {generationRequestId: string};

export type GetApiV3AiImageGenerationsGenerationRequestIdOptions = {baseUrl: string, ApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const previewUrl = z.object({preview_size: z.string().nullable().optional(), image_url: z.string().nullable().optional(), width: z.number().int().optional(), height: z.number().int().optional()});

export const imageDataResponse = z.object({index: z.number().int().optional(), is_blocked: z.boolean().optional(), preview_urls: z.array(previewUrl).nullable().optional(), url: z.string().nullable()});

export const assetDetail = z.object({id: z.string().nullable().optional()});

export const imageGenerationsResponse = z.object({generation_request_id: z.string().nullable().optional(), seed: z.number().int().nullable().optional(), results: z.array(imageDataResponse).nullable().optional(), original_asset: assetDetail.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 generated images from a previous generation request
 * 
 * GET /v3/ai/image-generations/{generationRequestId}
 * 
 * Also accepts auth: OAuth2
 */
export const getApiV3AiImageGenerationsGenerationRequestId = async (args: GetApiV3AiImageGenerationsGenerationRequestIdArgs, options: GetApiV3AiImageGenerationsGenerationRequestIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (ApiKey !== undefined) headers.set("Api-Key", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v3/ai/image-generations/${encodeURIComponent(String(args.generationRequestId))}${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(imageGenerationsResponse, await res.json())
};