import {z} from 'zod'

export type GetApiServerWorkerStartArgs = {model_name: string, adaptor?: string | undefined, model_filename?: (string | null) | undefined, eight_bit?: boolean | undefined, cpu_offload?: boolean | undefined, inference_engine?: string | undefined, experiment_id?: string | undefined, inference_params?: string | undefined};

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

export const getApiServerWorkerStartResponse = z.unknown();

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
};

/**
 * Server Worker Start
 * 
 * GET /server/worker_start
 */
export const getApiServerWorkerStart = async (args: GetApiServerWorkerStartArgs, options: GetApiServerWorkerStartOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.model_name != null) query.append("model_name", String(args.model_name))
if (args.adaptor != null) query.append("adaptor", String(args.adaptor))
if (args.model_filename != null) query.append("model_filename", String(args.model_filename))
if (args.eight_bit != null) query.append("eight_bit", String(args.eight_bit))
if (args.cpu_offload != null) query.append("cpu_offload", String(args.cpu_offload))
if (args.inference_engine != null) query.append("inference_engine", String(args.inference_engine))
if (args.experiment_id != null) query.append("experiment_id", String(args.experiment_id))
if (args.inference_params != null) query.append("inference_params", String(args.inference_params))

const url = `${baseUrl.replace(/\/+$/, '')}/server/worker_start${query.size > 0 ? `?${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(getApiServerWorkerStartResponse, await res.json())
};