import {z} from 'zod'

export type InferenceRetryConfig = {max_attempts?: number | undefined, initial_delay_ms?: number | undefined, max_delay_ms?: number | undefined};

export type AsyncPredictRequest = {model_input: Record<string, never>, webhook_endpoint?: string | undefined, priority?: number | undefined, max_time_in_queue_seconds?: number | undefined, inference_retry_config?: InferenceRetryConfig | undefined};

export type CreateApiEnvironmentsEnvNameAsyncPredictArgs = {env_name: string, body: AsyncPredictRequest};

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

export const createApiEnvironmentsEnvNameAsyncPredictResponse = z.object({request_id: z.string()});

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
};

/**
 * Asynchronously call a named environment of a model.
 * 
 * POST /environments/{env_name}/async_predict
 */
export const createApiEnvironmentsEnvNameAsyncPredict = async (args: CreateApiEnvironmentsEnvNameAsyncPredictArgs, options: CreateApiEnvironmentsEnvNameAsyncPredictOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/environments/${encodeURIComponent(String(args.env_name))}/async_predict${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(createApiEnvironmentsEnvNameAsyncPredictResponse, await res.json())
};