"""
AIoT 边缘设备路由 - 芋道规范

统一到 /admin-api/aiot/edge 命名空间，与 aiot 平台架构对齐。

API 路径规范：
    - /admin-api/aiot/edge/device/page - 分页查询设备
    - /admin-api/aiot/edge/device/get - 获取设备详情
    - /admin-api/aiot/edge/device/statistics - 设备统计

注意：边缘端未实现心跳机制，因此运行时长/处理帧数等实时指标不可用。
告警数统计从 alarm_event 表中提取 edge_node_id 字段。
"""

from fastapi import APIRouter, Query, Depends, HTTPException
from typing import Optional

from app.yudao_compat import YudaoResponse, get_current_user
from app.services.device_service import get_device_service, DeviceService
from app.services.alarm_event_service import get_alarm_event_service, AlarmEventService

router = APIRouter(prefix="/admin-api/aiot/edge", tags=["AIoT-边缘设备"])


@router.get("/device/page")
async def get_device_page(
    pageNo: int = Query(1, ge=1, description="页码"),
    pageSize: int = Query(20, ge=1, le=100, description="每页大小"),
    status: Optional[str] = Query(None, description="设备状态: online/offline/error"),
    service: DeviceService = Depends(get_device_service),
    alarm_service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """分页查询边缘设备列表（告警数从 alarm_event 表统计）"""
    devices, total = service.get_devices(
        status=status,
        page=pageNo,
        page_size=pageSize,
    )

    device_list = []
    for device in devices:
        device_dict = device.to_dict()
        device_id = device_dict.get("device_id")

        # 从 alarm_event 表统计告警数
        alerts_count = alarm_service.count_alarms_by_edge_node(device_id)

        device_list.append({
            "id": device_dict.get("id"),
            "deviceId": device_id,
            "deviceName": device_dict.get("device_name"),
            "status": device_dict.get("status"),
            "statusName": _get_status_name(device_dict.get("status")),
            "lastHeartbeat": device_dict.get("last_heartbeat"),
            "uptimeSeconds": None,  # 无心跳机制，不可用
            "framesProcessed": None,  # 无心跳机制，不可用
            "alertsGenerated": alerts_count,  # 从 alarm_event 表统计
            "ipAddress": device_dict.get("ip_address"),
            "streamCount": device_dict.get("stream_count"),
            "configVersion": device_dict.get("config_version"),
            "extraInfo": device_dict.get("extra_info"),
            "updatedAt": device_dict.get("updated_at"),
        })

    return YudaoResponse.page(
        list_data=device_list,
        total=total,
        page_no=pageNo,
        page_size=pageSize
    )


@router.get("/device/get")
async def get_device(
    id: str = Query(..., description="设备ID"),
    service: DeviceService = Depends(get_device_service),
    alarm_service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """获取设备详情（告警数从 alarm_event 表统计）"""
    device = service.get_device(id)
    if not device:
        raise HTTPException(status_code=404, detail="设备不存在")

    device_dict = device.to_dict()
    device_id = device_dict.get("device_id")

    # 从 alarm_event 表统计告警数
    alerts_count = alarm_service.count_alarms_by_edge_node(device_id)

    return YudaoResponse.success({
        "id": device_dict.get("id"),
        "deviceId": device_id,
        "deviceName": device_dict.get("device_name"),
        "status": device_dict.get("status"),
        "statusName": _get_status_name(device_dict.get("status")),
        "lastHeartbeat": device_dict.get("last_heartbeat"),
        "uptimeSeconds": None,  # 无心跳机制，不可用
        "framesProcessed": None,  # 无心跳机制，不可用
        "alertsGenerated": alerts_count,  # 从 alarm_event 表统计
        "ipAddress": device_dict.get("ip_address"),
        "streamCount": device_dict.get("stream_count"),
        "configVersion": device_dict.get("config_version"),
        "extraInfo": device_dict.get("extra_info"),
        "updatedAt": device_dict.get("updated_at"),
    })


@router.get("/device/statistics")
async def get_device_statistics(
    service: DeviceService = Depends(get_device_service),
    current_user: dict = Depends(get_current_user)
):
    """获取设备统计"""
    stats = service.get_statistics()

    return YudaoResponse.success({
        "total": stats.get("total", 0),
        "online": stats.get("online", 0),
        "offline": stats.get("offline", 0),
        "error": stats.get("error", 0),
    })


# ==================== 辅助函数 ====================

def _get_status_name(status: Optional[str]) -> str:
    """获取设备状态名称"""
    status_names = {
        "online": "在线",
        "offline": "离线",
        "error": "异常",
    }
    return status_names.get(status, status or "未知")