"""
AIoT 告警路由 - 芋道规范（新三表结构）

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

API 路径规范：
    - /admin-api/aiot/alarm/alert/page - 分页查询
    - /admin-api/aiot/alarm/alert/get - 获取详情
    - /admin-api/aiot/alarm/alert/handle - 处理告警
    - /admin-api/aiot/alarm/alert/delete - 删除告警
    - /admin-api/aiot/alarm/alert/statistics - 获取统计
    - /admin-api/aiot/alarm/device-summary/page - 设备告警汇总
"""

from fastapi import APIRouter, Query, Depends, HTTPException
from typing import Optional
from datetime import datetime
import asyncio
import os
import httpx

from app.yudao_compat import YudaoResponse, get_current_user
from app.services.alarm_event_service import get_alarm_event_service, AlarmEventService
from app.services.notification_service import get_notification_service
from app.services.oss_storage import get_oss_storage
from app.services.camera_name_service import get_camera_name_service
from app.schemas import EdgeAlarmReport, EdgeAlarmResolve
from app.utils.logger import logger

router = APIRouter(prefix="/admin-api/aiot/alarm", tags=["AIoT-告警"])


async def _alarm_to_camel(alarm_dict: dict, camera_info_map: dict = None, camera_service=None) -> dict:
    """将 alarm_event 字典转换为前端 camelCase 格式（兼容前端旧字段名）

    Args:
        alarm_dict: 告警字典
        camera_info_map: 摄像头信息映射 {device_id: camera_info}，可选
        camera_service: 摄像头服务实例，可选
    """
    # snapshot_url: 根据存储方式转为可访问 URL
    storage = get_oss_storage()
    snapshot_url = alarm_dict.get("snapshot_url")
    if snapshot_url:
        if snapshot_url.startswith("local:"):
            # 边缘端 COS 未配置时的本地路径标记，云端无法访问
            snapshot_url = ""
        else:
            snapshot_url = storage.get_url(snapshot_url)

    # alarm_level int → 文本映射
    alarm_level = alarm_dict.get("alarm_level")
    level_map = {1: "low", 2: "medium", 3: "high", 4: "critical"}
    level_str = level_map.get(alarm_level, "medium") if alarm_level else "medium"

    # alarm_status → 前端 status 映射
    alarm_status = alarm_dict.get("alarm_status", "NEW")
    status_map = {"NEW": "pending", "CONFIRMED": "handled", "FALSE": "ignored", "CLOSED": "handled"}
    status_str = status_map.get(alarm_status, "pending")

    # confidence_score 0-1 → 百分比
    confidence_score = alarm_dict.get("confidence_score")
    confidence_pct = round(confidence_score * 100) if confidence_score is not None else None

    # duration_ms → 分钟
    duration_ms = alarm_dict.get("duration_ms")
    duration_minutes = round(duration_ms / 60000, 1) if duration_ms else None

    alarm_id = alarm_dict.get("alarm_id")
    device_id = alarm_dict.get("device_id")

    # 获取摄像头信息
    camera_info = None
    if camera_info_map and device_id in camera_info_map:
        camera_info = camera_info_map[device_id]

    # 获取摄像头名称
    device_name = device_id  # 默认值
    if camera_service and camera_info:
        device_name = camera_service.format_display_name(device_id, camera_info)

    # 提取摄像头ID（统一使用stream作为编号）
    camera_id = device_id  # 默认值
    if camera_info:
        stream = camera_info.get("stream")
        if stream:
            camera_id = stream
    elif device_id and "/" in device_id:
        # app/stream 格式，直接解析
        parts = device_id.split("/", 1)
        if len(parts) == 2:
            camera_id = parts[1]

    return {
        # 新字段（三表结构）
        "alarmId": alarm_id,
        "alarmType": alarm_dict.get("alarm_type"),
        "alarmTypeName": _get_alarm_type_name(alarm_dict.get("alarm_type")),
        "algorithmCode": alarm_dict.get("algorithm_code"),
        "deviceId": alarm_dict.get("device_id"),
        "deviceName": device_name,
        "sceneId": alarm_dict.get("scene_id"),
        "eventTime": alarm_dict.get("event_time"),
        "firstFrameTime": alarm_dict.get("first_frame_time"),
        "lastFrameTime": alarm_dict.get("last_frame_time"),
        "durationMs": duration_ms,
        "alarmLevel": alarm_level,
        "confidenceScore": confidence_score,
        "alarmStatus": alarm_status,
        "handleStatus": alarm_dict.get("handle_status"),
        "snapshotUrl": snapshot_url,
        "videoUrl": alarm_dict.get("video_url"),
        "edgeNodeId": alarm_dict.get("edge_node_id"),
        "handler": alarm_dict.get("handler"),
        "handleRemark": alarm_dict.get("handle_remark"),
        "handledAt": alarm_dict.get("handled_at"),
        "createdAt": alarm_dict.get("created_at"),
        "updatedAt": alarm_dict.get("updated_at"),
        "ext": alarm_dict.get("ext"),
        "llmAnalyses": alarm_dict.get("llm_analyses"),
        # 兼容前端旧字段名
        "id": alarm_id,
        "alertNo": alarm_id,
        "deviceId": device_id,  # 原始ID（用于查询）
        "cameraId": camera_id,  # 摄像头ID（stream编号）
        "cameraName": device_name,  # 摄像头名称
        "alertType": alarm_dict.get("alarm_type"),
        "alertTypeName": _get_alarm_type_name(alarm_dict.get("alarm_type")),
        "confidence": confidence_pct,
        "durationMinutes": duration_minutes,
        "status": status_str,
        "level": level_str,
        "triggerTime": alarm_dict.get("event_time"),
        "ossUrl": snapshot_url,
        "message": None,
        "bbox": (alarm_dict.get("ext") or {}).get("ext_data", {}).get("bbox") if isinstance(alarm_dict.get("ext"), dict) else None,
    }


# ==================== 告警管理 ====================

@router.get("/alert/page")
async def get_alert_page(
    pageNo: int = Query(1, ge=1, description="页码"),
    pageSize: int = Query(20, ge=1, le=100, description="每页大小"),
    deviceId: Optional[str] = Query(None, description="摄像头/设备ID"),
    cameraId: Optional[str] = Query(None, description="摄像头ID（兼容旧接口）"),
    edgeNodeId: Optional[str] = Query(None, description="边缘节点ID"),
    alarmType: Optional[str] = Query(None, alias="alertType", description="告警类型"),
    alarmStatus: Optional[str] = Query(None, alias="status", description="告警状态"),
    alarmLevel: Optional[int] = Query(None, description="告警级别: 1提醒/2一般/3严重/4紧急"),
    startTime: Optional[datetime] = Query(None, description="开始时间"),
    endTime: Optional[datetime] = Query(None, description="结束时间"),
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """分页查询告警列表"""
    # 兼容旧接口的 status 文本转换
    if alarmStatus and alarmStatus in ("pending", "handled", "ignored"):
        status_convert = {"pending": "NEW", "handled": "CONFIRMED", "ignored": "FALSE"}
        alarmStatus = status_convert.get(alarmStatus, alarmStatus)

    alarms, total = service.get_alarms(
        device_id=deviceId or cameraId,
        alarm_type=alarmType,
        alarm_status=alarmStatus,
        alarm_level=alarmLevel,
        edge_node_id=edgeNodeId,
        start_time=startTime,
        end_time=endTime,
        page=pageNo,
        page_size=pageSize,
    )

    # 提取所有唯一的 device_id
    device_ids = list(set(a.device_id for a in alarms if a.device_id))

    # 批量查询摄像头信息（去重+并发优化），失败不影响列表返回
    camera_service = get_camera_name_service()
    camera_info_map = {}
    try:
        camera_info_map = await camera_service.get_camera_infos_batch(device_ids)
    except Exception as e:
        logger.warning(f"批量查询摄像头信息失败，将使用 device_id 作为名称: {e}")

    # 转换为 camelCase 格式（使用摄像头信息映射）
    alarm_list = [await _alarm_to_camel(a.to_dict(), camera_info_map, camera_service) for a in alarms]

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


@router.get("/alert/get")
async def get_alert(
    alarmId: Optional[str] = Query(None, description="告警ID"),
    id: Optional[str] = Query(None, description="告警ID（兼容旧接口）"),
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """获取告警详情"""
    alarm_id = alarmId or id
    if not alarm_id:
        raise HTTPException(status_code=400, detail="缺少 alarmId 或 id 参数")
    alarm_dict = service.get_alarm(alarm_id)
    if not alarm_dict:
        raise HTTPException(status_code=404, detail="告警不存在")

    # 查询单个摄像头信息（失败不影响详情返回）
    device_id = alarm_dict.get("device_id")
    camera_service = get_camera_name_service()
    camera_info_map = {}
    if device_id:
        try:
            camera_info = await camera_service.get_camera_info(device_id)
            camera_info_map[device_id] = camera_info
        except Exception as e:
            logger.warning(f"查询摄像头信息失败: device_id={device_id}, error={e}")

    return YudaoResponse.success(await _alarm_to_camel(alarm_dict, camera_info_map, camera_service))


@router.put("/alert/handle")
async def handle_alert(
    alarmId: Optional[str] = Query(None, description="告警ID"),
    id: Optional[str] = Query(None, description="告警ID（兼容）"),
    alarmStatus: Optional[str] = Query(None, description="告警状态: CONFIRMED/FALSE/CLOSED"),
    handleStatus: Optional[str] = Query(None, description="处理状态: HANDLING/DONE"),
    status: Optional[str] = Query(None, description="处理状态（兼容旧接口）"),
    remark: Optional[str] = Query(None, description="处理备注"),
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """处理告警"""
    alarm_id = alarmId or id
    if not alarm_id:
        raise HTTPException(status_code=400, detail="缺少 alarmId 或 id 参数")
    handler = current_user.get("username", "admin")

    # 兼容旧接口: status=handled → alarmStatus=CONFIRMED, status=ignored → alarmStatus=FALSE
    if not alarmStatus and status:
        status_convert = {"handled": "CONFIRMED", "ignored": "FALSE", "resolved": "CLOSED"}
        alarmStatus = status_convert.get(status, status.upper())

    alarm = service.handle_alarm(
        alarm_id=alarm_id,
        alarm_status=alarmStatus,
        handle_status=handleStatus,
        remark=remark,
        handler=handler,
    )
    if not alarm:
        raise HTTPException(status_code=404, detail="告警不存在")

    return YudaoResponse.success(True)


@router.delete("/alert/delete")
async def delete_alert(
    alarmId: Optional[str] = Query(None, description="告警ID"),
    id: Optional[str] = Query(None, description="告警ID（兼容）"),
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """删除告警"""
    alarm_id = alarmId or id
    if not alarm_id:
        raise HTTPException(status_code=400, detail="缺少 alarmId 或 id 参数")
    success = service.delete_alarm(alarm_id)
    if not success:
        raise HTTPException(status_code=404, detail="告警不存在")

    return YudaoResponse.success(True)


@router.get("/alert/statistics")
async def get_statistics(
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """获取告警统计"""
    stats = service.get_statistics()

    return YudaoResponse.success(stats)


# ==================== 设备告警汇总 ====================

@router.get("/device-summary/page")
async def get_device_summary_page(
    pageNo: int = Query(1, ge=1, description="页码"),
    pageSize: int = Query(20, ge=1, le=100, description="每页大小"),
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user)
):
    """获取设备告警汇总（分页）"""
    result = service.get_device_summary(page=pageNo, page_size=pageSize)

    # 添加前端兼容字段别名，并查询摄像头名称（使用配置化服务）
    camera_service = get_camera_name_service()
    compat_list = []
    for item in result.get("list", []):
        device_id = item.get("deviceId")

        # 查询摄像头信息（失败不影响列表返回）
        camera_info = None
        try:
            camera_info = await camera_service.get_camera_info(device_id)
        except Exception as e:
            logger.warning(f"查询摄像头信息失败: device_id={device_id}, error={e}")

        # 提取摄像头名称
        device_name = camera_service.format_display_name(device_id, camera_info)

        # 提取摄像头ID（统一使用stream作为编号）
        camera_id = device_id  # 默认值
        if camera_info:
            stream = camera_info.get("stream")
            if stream:
                camera_id = stream
        elif "/" in device_id:
            # app/stream 格式，直接解析
            parts = device_id.split("/", 1)
            if len(parts) == 2:
                camera_id = parts[1]

        item["deviceId"] = device_id  # 原始ID（用于查询）
        item["cameraId"] = camera_id  # 摄像头ID（stream编号）
        item["cameraName"] = device_name  # 摄像头名称
        item["deviceName"] = device_name  # 摄像头名称（兼容）
        item["pendingCount"] = item.get("unhandledCount")
        item["lastAlertTime"] = item.get("lastEventTime")
        item["lastAlertType"] = item.get("lastAlarmType")
        item["lastAlertTypeName"] = _get_alarm_type_name(item.get("lastAlarmType"))
        compat_list.append(item)

    return YudaoResponse.page(
        list_data=compat_list,
        total=result.get("total", 0),
        page_no=pageNo,
        page_size=pageSize
    )


# ==================== 边缘端告警上报 ====================

@router.post("/edge/report")
async def edge_alarm_report(
    report: EdgeAlarmReport,
    service: AlarmEventService = Depends(get_alarm_event_service),
    current_user: dict = Depends(get_current_user),
):
    """
    边缘端告警上报接口

    边缘设备通过 HTTP POST 上报告警元数据，截图已预先上传到 COS。
    支持幂等：通过 alarm_id 判断是否已存在。
    """
    alarm = service.create_from_edge_report(report.model_dump())

    if alarm is None:
        return YudaoResponse.error(500, "告警创建失败")

    # WebSocket 通知
    try:
        notification_svc = get_notification_service()
        notification_svc.notify_sync("new_alert", alarm.to_dict())
    except Exception:
        pass  # WebSocket 通知失败不影响主流程

    # 异步上报运维平台（提前提取字段，避免 ORM session 关闭后无法访问）
    ops_data = {
        "alarm_id": alarm.alarm_id,
        "alarm_type": alarm.alarm_type,
        "device_id": alarm.device_id,
        "event_time": alarm.event_time.strftime("%Y-%m-%dT%H:%M:%S") if isinstance(alarm.event_time, datetime) else str(alarm.event_time or ""),
        "alarm_level": alarm.alarm_level or 2,
    }
    asyncio.create_task(_notify_ops_platform(ops_data))

    return YudaoResponse.success({
        "alarmId": alarm.alarm_id,
        "created": True,
    })


@router.post("/edge/resolve")
async def edge_alarm_resolve(
    resolve: EdgeAlarmResolve,
    service: AlarmEventService = Depends(get_alarm_event_service),
):
    """
    边缘端告警结束通知

    Edge 在人员回岗确认或非工作时间到达时调用此接口，
    更新告警的 duration_ms 和 last_frame_time。
    """
    success = service.resolve_alarm(
        alarm_id=resolve.alarm_id,
        duration_ms=resolve.duration_ms,
        last_frame_time=resolve.last_frame_time,
        resolve_type=resolve.resolve_type,
    )
    if not success:
        return YudaoResponse.error(404, "告警不存在")
    return YudaoResponse.success(True)


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

OPS_ALARM_URL = os.getenv("OPS_ALARM_URL", "http://192.168.0.104:48080/admin-api/ops/alarm/receive")


async def _notify_ops_platform(data: dict):
    """异步上报告警到运维平台（失败不影响主流程）"""
    payload = {
        "alarmId": data["alarm_id"],
        "alarmType": data["alarm_type"],
        "deviceId": data["device_id"],
        "eventTime": data["event_time"],
        "alarmLevel": data["alarm_level"],
        "notifyUserIds": [1],
        "tenantId": 1,
    }
    try:
        async with httpx.AsyncClient(timeout=10) as client:
            resp = await client.post(OPS_ALARM_URL, json=payload)
            if resp.status_code == 200:
                logger.info(f"运维平台上报成功: {data['alarm_id']}, resp={resp.text[:200]}")
            else:
                logger.warning(f"运维平台上报失败: status={resp.status_code}, body={resp.text[:200]}")
    except Exception as e:
        logger.warning(f"运维平台上报异常: {e}")


def _get_alarm_type_name(alarm_type: Optional[str]) -> str:
    """获取告警类型名称"""
    type_names = {
        "leave_post": "离岗检测",
        "intrusion": "周界入侵",
        "crowd": "人群聚集",
        "fire": "火焰检测",
        "smoke": "烟雾检测",
        "fall": "跌倒检测",
        "helmet": "安全帽检测",
        "unknown": "未知类型",
    }
    return type_names.get(alarm_type, alarm_type or "未知类型")