/** 异步 Job 研究执行（Phase 4）：POST /api/jobs 提交 → 轮询 GET /api/jobs/{id}。
 *
 * 大样本研究（全市场）可能耗时数十秒到分钟级，经异步 Job 后台执行，
 * 避免 HTTP 长阻塞（AGENT §19）。页面提交后即时返回 job_id，再轮询到终态。
 */
import { apiGet, apiPost } from "./api";
import type { ResearchSpec } from "./types";

export interface JobSubmit {
  job_id: string;
  status: string;
}

export interface JobStatusResp {
  job_id: string;
  status: string;
  result?: unknown;
  error?: string | null;
  spec?: Record<string, unknown>;
}

export function submitJob(spec: ResearchSpec): Promise<JobSubmit> {
  return apiPost<JobSubmit>("/jobs", spec);
}

/** 轮询直到 success / failed / cancelled，或超时（默认 10 分钟）。 */
export async function waitJob<T>(
  jobId: string,
  timeoutMs = 600_000,
): Promise<{ status: string; result: T | null; error?: string }> {
  const deadline = Date.now() + timeoutMs;
  while (Date.now() < deadline) {
    const job = await apiGet<JobStatusResp>(`/jobs/${jobId}`);
    if (job.status === "success") {
      return { status: job.status, result: (job.result as T) ?? null };
    }
    if (job.status === "failed" || job.status === "cancelled") {
      return { status: job.status, result: null, error: job.error ?? undefined };
    }
    await new Promise((resolve) => setTimeout(resolve, 1500));
  }
  return { status: "timeout", result: null, error: "等待结果超时，请稍后在「实验」页查看归档" };
}