"""
查询离线/异常设备 — GET /aibox/get_offline_devices
"""
import json
import logging
from datetime import datetime

from chongming_worker import rpc_method

logger = logging.getLogger(__name__)


@rpc_method(
    subject="aibox_sophon_adapter.get_offline_devices",
    method="GET",
    summary="查询离线/异常设备列表",
)
async def get_offline_devices(worker_id: str = "") -> dict:
    """返回所有超过心跳超时时间未上报的设备列表"""
    from ..global_var import db, heartbeat_timeout

    offline_devices = []
    try:
        if db is None:
            raise RuntimeError("Database not initialized")
        async with db.get_session() as session:
            from ..models.orm import BoardHeartbeat
            from sqlalchemy import desc, select

            stmt = select(BoardHeartbeat).order_by(desc(BoardHeartbeat.last_ping_time)) # type: ignore
            result = await session.execute(stmt)
            records = result.scalars().all()

            now = datetime.now()
            for record in records:
                elapsed = (now - record.last_ping_time).total_seconds()
                is_online = elapsed <= heartbeat_timeout

                if not is_online:
                    offline_devices.append({
                        "board_id": record.board_id,
                        "board_ip": record.board_ip,
                        "board_platform": record.board_platform,
                        "board_type": record.board_type,
                        "status": record.status,
                        "version": record.version,
                        "last_ping_time": record.last_ping_time.isoformat() if record.last_ping_time else None,
                        "elapsed_seconds": round(elapsed, 1),
                        "is_online": False,
                    })

    except Exception as e:
        logger.error(f"[get_offline_devices] 查询失败: {e}")
        return {"offline_devices": [], "total": 0, "error": str(e)}

    return {"offline_devices": offline_devices, "total": len(offline_devices)}