import {z} from 'zod'

export type GetApiV1NameReadOutputFramesArgs = {name: string};

export type GetApiV1NameReadOutputFramesOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const v1OutputStream = z.enum(["OUTPUT_STREAM_UNSPECIFIED", "OUTPUT_STREAM_STDOUT", "OUTPUT_STREAM_STDERR", "OUTPUT_STREAM_COMBINED"]);

export const v1OutputFrame = z.object({stream: v1OutputStream.optional(), data: z.string().optional()});

export const v1ReadOutputFramesResponse = z.object({frames: z.array(v1OutputFrame).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
};

/**
 * (-- api-linter: core::0131::synonyms=disabled
 *     aip.dev/not-precedent: ReadOutputFrames reads structured output
 *     frames, not a resource. --)
 * Reads the structured output of a process as ordered, per-stream-tagged
 * frames. Returns the same byte content as ReadOutput(COMBINED) but
 * preserves the chunk boundaries and per-stream identity that
 * StreamOutput emits live — without requiring a live subscription.
 * 
 * GET /v1/{name}:readOutputFrames
 */
export const getApiV1NameReadOutputFrames = async (args: GetApiV1NameReadOutputFramesArgs, options: GetApiV1NameReadOutputFramesOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/${encodeURIComponent(String(args.name))}:readOutputFrames${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(v1ReadOutputFramesResponse, await res.json())
};