import {z} from 'zod'

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

export const workerStatus = z.object({is_running: z.boolean().optional(), is_alive: z.boolean().optional(), pid_file_exists: z.boolean().optional(), heartbeat_file_exists: z.boolean().optional(), heartbeat_age_seconds: z.number().int().optional(), pid_data: z.object({pid: z.number().int().optional(), worker_id: z.string().optional(), started_at: z.string().optional(), poll_interval: z.number().int().optional()}).optional(), heartbeat_data: z.object({worker_id: z.string().optional(), pid: z.number().int().optional(), timestamp: z.number().int().optional(), datetime: z.string().optional()}).optional(), active_worker_count: z.number().int().optional(), active_worker_ids: z.array(z.string()).optional()});

export const workerStatusResponse = z.object({status: z.string().optional(), worker: workerStatus.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
};

/**
 * Get worker daemon status
 * 
 * GET /jobs/worker_status
 */
export const getApiJobsWorkerStatus = async (options?: GetApiJobsWorkerStatusOptions) => {
const {baseUrl = "https://localhost/index.php/api", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

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