import asyncio
import json
import pathlib
import uuid
from uuid import UUID

from fastapi import APIRouter
from fastapi import Depends

from config.minIO import get_upload_token
from config.redis import redis_client
from db.postgres.iot import *
from models.BaseResponse import BaseResponse
from models.IotDeviceCommandRequest import IotDeviceCommandRequest

iot_router = APIRouter()
from config.security import get_user_id_from_token

# -------------------- 设备接口 --------------------


# 已废弃 Webhooks的离线通知不及时（突然断电断网）
# @iot_router.post("/common/webhook")
# async def emqx_webhook(data: EMQXWebhook):
#     device_id = data.clientid
#     event = data.event
#
#     if event == "client.connected":
#         redis_client.set_online(device_id)
#         # 这里刻意等1s 是因为设备连接后这里首先接到通知，但是状态信息设备来没来得及通过mqtt发送来，所以在此等待
#         # 没有直接在mqtt发送来的消息中获取在线状态是因为 这里是通过emqx的webhooks通知的，两种通知方式不同，一方面防止其中一种逻辑失效，另一方面在mqtt消息接收中设置在线状态会存在滞后性，同时也需要设置遗嘱消息，较为
#         await asyncio.sleep(1)
#         await ws_manager.noticeOnlineStatus(
#             {
#                 "deviceId": device_id,
#                 "online": True,
#                 "type": "status",
#             }
#         )
#
#         print(f"[新设备在线] {device_id}")
#
#     elif event == "client.disconnected":
#         redis_client.set_offline(device_id)
#         await ws_manager.noticeOnlineStatus(
#             {
#                 "deviceId": device_id,
#                 "online": False,
#                 "type": "status",
#             }
#         )
#
#         print(f"[设备离线] {device_id}")
#
#     else:
#         # 其他事件直接忽略
#         print(f"[其他事件] {event}")
#
#     return {"ok": True}


@iot_router.get("/common/device/list")
async def get_device_list(
    page: int = 1,
    pageSize: int = 10,
    id: str | None = None,
    name: str | None = None,
    status: int | None = None,
    is_superuser: int | None = None,
    dept_id: str | None = None,
    startTime: str | None = None,
    endTime: str | None = None,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}

    devices, total = get_device_list_db_page(
        page, pageSize, id, name, status, is_superuser, dept_id, startTime, endTime
    )

    # ===== 👇 核心：补在线状态 =====
    for d in devices:
        device_id = d["name"]  # 账号

        info_json = redis_client.get_device_info(device_id)
        d["online"] = info_json.get("online", "0") == "1"
        d["version"] = info_json.get("version", "")
        d["ip"] = info_json.get("ip", "")
        d["hostname"] = info_json.get("hostname", "")
        d["mac"] = info_json.get("mac", "")
        d["os"] = info_json.get("os", "")
        d["cpu"] = info_json.get("cpu", "")
        d["memory_total"] = info_json.get("memory_total", "")
        d["disk_total"] = info_json.get("disk_total", "")
        d["last_seen"] = info_json.get("last_seen", "")

    return BaseResponse(data={"list": devices, "total": total})


@iot_router.post("/common/device")
async def create_device(data: dict, user_id: UUID = Depends(get_user_id_from_token)):
    if not user_id:
        return {"error": "userId is required"}
    new_id = insert_device(data)
    return BaseResponse(data={"id": new_id})


@iot_router.put("/common/device/{id}")
async def update_device(
    id: str,
    data: dict,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}

    count = update_device_db(id, data)
    if count == 0:
        return BaseResponse(status=False, message="设备不存在", data=None)
    return BaseResponse(data=True)


@iot_router.patch("/common/device/{id}")
async def patch_device(
    id: str,
    data: dict,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}

    count = patch_device_db(id, data)
    if count == 0:
        return BaseResponse(status=False, message="设备不存在", data=None)
    return BaseResponse(data=True)


@iot_router.delete("/common/device/{id}")
async def delete_device(
    id: str,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}

    deleted = delete_device_db(id)
    if deleted == 0:
        return BaseResponse(status=False, message="设备不存在", data=None)
    return BaseResponse(data=True)


@iot_router.get("/common/update/list")
async def get_update_list(
    page: int = 1,
    pageSize: int = 10,
    id: str | None = None,
    code: str | None = None,
    dept_id: str | None = None,
    startTime: str | None = None,
    endTime: str | None = None,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}
    if code == "" or code is None:
        code = None
    else:
        code = int(code)

    updates, total = get_update_list_db_page(
        page, pageSize, id, code, dept_id, startTime, endTime
    )

    return BaseResponse(data={"list": updates, "total": total})


@iot_router.post("/common/update")
async def create_update(data: dict, user_id: UUID = Depends(get_user_id_from_token)):
    if not user_id:
        return {"error": "userId is required"}

    dept_id = data.get("dept_id")
    if not dept_id:
        return {"error": "dept_id is required"}

    # 前端传来的版本号
    try:
        new_code = int(data.get("code", 0))
    except (TypeError, ValueError):
        return BaseResponse(
            status=False,
            message="无效的版本号",
            data=None,
        )

    # 获取该组织当前最大版本号
    max_code = getMaxCodeByDeptId(dept_id)

    if new_code <= max_code:
        return BaseResponse(
            status=False,
            message=f"新版本号必须大于当前最大版本号 {max_code}",
            data=None,
        )

    # 插入数据库
    new_id = insert_update(data)
    return BaseResponse(data={"id": new_id})


@iot_router.delete("/common/update/{id}")
async def delete_update(
    id: str,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}

    deleted = delete_update_db(id)
    if deleted == 0:
        return BaseResponse(status=False, message="更新记录不存在", data=None)

    return BaseResponse(data=True)


@iot_router.get("/common/update/getUploadUrl")
def getUploadUrl(
    filename: str | None = None,
    user_id: UUID = Depends(get_user_id_from_token),
):
    if not user_id:
        return {"error": "userId is required"}
    # 生成唯一文件名，避免覆盖
    ext = pathlib.Path(filename).suffix if filename else ""  # 获取文件后缀
    object_name = f"{uuid.uuid4()}{ext}"  # 拼接到 UUID 后面
    return BaseResponse(
        data={
            "uploadUrl": get_upload_token("iot-update", object_name),
            "id": object_name,
        }
    )


@iot_router.get("/common/update/getMaxCodeByDeptId")
def updateGetMaxCodeByDeptId(
    user_id: UUID = Depends(get_user_id_from_token),
    dept_id: str | None = None,
):
    if not user_id:
        return {"error": "userId is required"}
    # 生成唯一文件名，避免覆盖
    return BaseResponse(data=getMaxCodeByDeptId(dept_id))


@iot_router.get("/common/update/check")
def getUploadUrl(
    deviceID: str | None = None,
):
    return BaseResponse(data=get_update_package(deviceID))


# request_id -> asyncio.Future
pending_commands: dict[str, asyncio.Future] = {}


@iot_router.post("/common/device/command")
async def command(
    data: IotDeviceCommandRequest, user_id: UUID = Depends(get_user_id_from_token)
):
    if not user_id:
        return {"error": "userId is required"}

    request_id = str(uuid.uuid4())
    payload = {"request_id": request_id}

    loop = asyncio.get_running_loop()
    future = loop.create_future()
    pending_commands[request_id] = future

    from config.emqx import mqtt_publish

    await mqtt_publish(
        data.dept_id,
        "cmd",
        data.device_type,
        data.id,
        data.command,
        json.dumps(payload),
    )

    try:
        result = await asyncio.wait_for(future, timeout=5)
        return BaseResponse(data=result.get("massage"))
    except asyncio.TimeoutError:
        return BaseResponse(data=None, message="Device did not respond in time")
    except asyncio.CancelledError:
        # 请求被中断，必须清理，但不要吞
        pending_commands.pop(request_id, None)
        raise
    finally:
        pending_commands.pop(request_id, None)