"""长任务轮询端点 GET /jobs/:id（ARCH §7.4）。"""

from __future__ import annotations

import uuid
from typing import Annotated

from fastapi import APIRouter, Depends
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from ww_db import get_session
from ww_db.models import Job
from ww_shared import AppError, ErrorCode

router = APIRouter(prefix="/jobs", tags=["jobs"])


@router.get("/{job_id}")
async def get_job(
    job_id: uuid.UUID,
    session: Annotated[AsyncSession, Depends(get_session)],
) -> dict[str, object]:
    job = (await session.execute(select(Job).where(Job.id == job_id))).scalar_one_or_none()
    if job is None:
        raise AppError(ErrorCode.NOT_FOUND, f"job {job_id} not found")
    return {
        "id": str(job.id),
        "kind": job.kind,
        "status": job.status,
        "progress": job.progress,
        "result": job.result,
        "error": job.error,
    }