import {z} from 'zod'

export type UUIDSchema = string;

export type ClosableStreamRepr = {value: string, encoding?: ('ascii' | 'base64') | undefined, close?: boolean | undefined};

export type ExecSpec = {command: string, args?: Array<string> | undefined, shell?: boolean | undefined, env?: ({[key: string]: string} | null) | undefined, cwd?: string | undefined, uid?: number | undefined, gid?: number | undefined, stdin?: ClosableStreamRepr | undefined, truncate_output_at?: number | undefined};

export type CreateApiOperationsOperationIdSubprocessesArgs = {operationId: UUIDSchema, body: ExecSpec};

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

export const createApiOperationsOperationIdSubprocessesResponse = z.object({spid: z.number().int().gte(2)});

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
};

/**
 * Spawn an additional subprocess inside a running instance
 * 
 * POST /operations/{operationId}/subprocesses
 */
export const createApiOperationsOperationIdSubprocesses = async (args: CreateApiOperationsOperationIdSubprocessesArgs, options?: CreateApiOperationsOperationIdSubprocessesOptions) => {
const {baseUrl = "https://api.tokenfactory.nebius.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/operations/${encodeURIComponent(String(args.operationId))}/subprocesses${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(createApiOperationsOperationIdSubprocessesResponse, await res.json())
};