import {z} from 'zod'

export type GetApiTrackerArgs = {agent_id?: (string | null) | undefined, limit?: number | undefined, page_number?: number | undefined, order_by?: (string | null) | undefined, order_direction?: string | undefined, task_id: string};

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

export const agentTaskTracker = z.object({agent_id: z.string(), created_at: z.string(), id: z.string(), last_processed_event_id: z.string().nullable().optional(), status: z.string().nullable().optional(), status_reason: z.string().nullable().optional(), task_id: z.string(), updated_at: z.string().nullable().optional()});

export const getApiTrackerResponse = z.array(agentTaskTracker);

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
};

/**
 * List Agent Task Trackers
 * 
 * GET /tracker
 */
export const getApiTracker = async (args: GetApiTrackerArgs, options: GetApiTrackerOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.agent_id != null) query.append("agent_id", String(args.agent_id))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.page_number != null) query.append("page_number", String(args.page_number))
if (args.order_by != null) query.append("order_by", String(args.order_by))
if (args.order_direction != null) query.append("order_direction", String(args.order_direction))
if (args.task_id != null) query.append("task_id", String(args.task_id))

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