import {z} from 'zod'

export type TaskPollInput = {poll_timeout_seconds: number, task_uuid_list: Array<unknown>};

export type CreateApiTasksPollArgs = {body: TaskPollInput};

export type CreateApiTasksPollOptions = {baseUrl: string, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const taskReference = z.object({kind: z.string(), name: z.string().optional(), uuid: z.string()});

export const reference = z.object({kind: z.string(), uuid: z.string(), name: z.string().optional()});

export const clusterReference = z.object({kind: z.string(), name: z.string().optional(), uuid: z.string()});

export const task = z.object({status: z.string().optional(), last_update_time: z.string().optional(), logical_timestamp: z.number().int().optional(), start_time: z.string().optional(), creation_time: z.string().optional(), completion_time: z.string().optional(), percentage_complete: z.number().int().optional(), parent_task_reference: taskReference.optional(), error_detail: z.string().optional(), uuid: z.string().optional(), entity_reference_list: z.array(reference).optional(), subtask_reference_list: z.array(taskReference).optional(), progress_message: z.string().optional(), operation_type: z.string().optional(), error_code: z.string().optional(), cluster_reference: clusterReference.optional(), api_version: z.string().optional()});

export const taskPollResponse = z.object({entities: z.array(task).optional(), has_poll_timed_out: z.boolean().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
};

/**
 * Poll for completion of tasks
 * 
 * POST /tasks/poll
 */
export const createApiTasksPoll = async (args: CreateApiTasksPollArgs, options: CreateApiTasksPollOptions) => {
const {baseUrl, fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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