import {z} from 'zod'

export type UUIDSchema = string;

export type GetApiOperationsOperationIdSubprocessesSpidArgs = {operationId: UUIDSchema, spid: number};

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

export const streamRepr = z.object({value: z.string(), encoding: z.enum(["ascii", "base64"]), truncated: z.boolean().optional()});

export const instanceResult = z.object({resources: z.object({block_input: z.number().int().optional(), block_output: z.number().int().optional(), cost: z.number().optional(), elapsed_time: z.number().optional(), involuntary_switches: z.number().int().optional(), max_rss: z.number().int().optional(), monotonic_time: z.number().optional(), page_faults: z.number().int().optional(), page_faults_io: z.number().int().optional(), shared_memory: z.number().int().optional(), signals: z.number().int().optional(), swaps: z.number().int().optional(), system_cpu_time: z.number().optional(), unshared_memory: z.number().int().optional(), user_cpu_time: z.number().optional(), voluntary_switches: z.number().int().optional()}).optional(), state: z.object({continued: z.boolean().optional(), core_dump: z.boolean().optional(), exit_code: z.number().int().optional(), pid: z.number().int().optional(), signal: z.number().int().optional(), stopped: z.boolean().optional(), timed_out: z.boolean().optional()}).optional(), stdout: streamRepr.optional(), stderr: streamRepr.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
};

/**
 * Result of one subprocess, reconstructed from its events
 * 
 * GET /operations/{operationId}/subprocesses/{spid}
 */
export const getApiOperationsOperationIdSubprocessesSpid = async (args: GetApiOperationsOperationIdSubprocessesSpidArgs, options?: GetApiOperationsOperationIdSubprocessesSpidOptions) => {
const {baseUrl = "https://api.tokenfactory.nebius.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/operations/${encodeURIComponent(String(args.operationId))}/subprocesses/${encodeURIComponent(String(args.spid))}${query.size > 0 ? `?${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(instanceResult, await res.json())
};