LAS/core/alarm_plan_manager.py

from typing import List, Tuple, Optional
import time
from datetime import datetime, date
import threading
from threading import Thread, Lock, Event
from enum import Enum
import queue
import json
import ast
import traceback

from common.sys_comm import LOGDBG, LOGINFO, LOGWARN, LOGERR

from core.alarm_event import AlarmEvent
from core.alarm_plan import AlarmPlan
from core.time_plan import TimePlan
from core.event_type import EventType
import core.g_LAS as g_las



class AlarmPlanManager:
    def __init__(self, alarm_plan_map: dict = None):
        self.lock_ = Lock()

        self.alarm_plan_map_ = alarm_plan_map or {}   # <uuid, AlarmPlan>

        self.running = False
        self.thread = None

    def push(self, plan_uuid: str, alarm_plan: AlarmPlan) -> None:
        """插入/更新一个 AlarmPlan"""
        with self.lock_:
            self.alarm_plan_map_[plan_uuid] = alarm_plan


    def pop(self, plan_uuid: str) -> Optional[AlarmPlan]:
        """弹出并返回 AlarmPlan，如果不存在返回 None"""
        with self.lock_:
            return self.alarm_plan_map_.pop(plan_uuid, None)


    def find(self, plan_uuid: str) -> Optional[AlarmPlan]:
        """查找 AlarmPlan，如果不存在返回 None"""
        with self.lock_:
            return self.alarm_plan_map_.get(plan_uuid, None)


    def delete(self, plan_uuid: str) -> bool:
        """删除 AlarmPlan，成功返回 True，不存在返回 False"""
        with self.lock_:
            if plan_uuid in self.alarm_plan_map_:
                del self.alarm_plan_map_[plan_uuid]
                return True
            return False


    def list_all(self) -> list:
        """返回所有 AlarmPlan（浅拷贝列表）"""
        with self.lock_:
            return list(self.alarm_plan_map_.values())


    def start_scheduler(self, interval=5):
        if self.running:
            return
        self.running = True
        self.thread = threading.Thread(target=self._scheduler, args=(interval,), daemon=True)
        self.thread.start()

    def stop_scheduler(self):
        self.running = False

    def _scheduler(self, interval):
        while self.running:
            plans = self.list_all()
            plan: AlarmPlan = None
            for plan in plans:
                try:
                    plan.update_status()       # 更新状态
                    if plan.status_ == 1:       # 激活状态才执行
                        plan.execute()
                except Exception as e:
                    LOGERR(f"[Scheduler] plan {plan.plan_uuid_} error: {e}")
            time.sleep(interval)


class EventDispatcher:
    def __init__(self):
        self.queues = {}  # event_type -> Queue
        self.threads = {}
        self.running = False

    def start(self, handlers: dict):
        """handlers: {event_type: handler_func}"""
        self.running = True
        for event_type, handler in handlers.items():
            q = queue.Queue()
            self.queues[event_type] = q

            t = threading.Thread(target=self.worker, args=(event_type, q, handler), daemon=True)
            self.threads[event_type] = t
            t.start()

    def stop(self):
        self.running = False

    def dispatch(self, event_type: int, plan):
        if event_type in self.queues:
            self.queues[event_type].put(plan)
        else:
            LOGINFO(f"[Dispatcher] No queue for event_type={event_type}")

    def worker(self, event_type, q: queue.Queue, handler):
        while self.running:
            try:
                plan = q.get(timeout=1)
                handler(plan)
            except queue.Empty:
                continue
            except Exception as e:
                LOGERR(f"[Dispatcher] Error in event_type={event_type}: {e}")


def init_alarm_plan_mgr():
    g_las.g_alarm_plan_mgr = AlarmPlanManager()
    g_las.g_event_dispatcher = EventDispatcher()


def start_event_dispatcher():
    # 注册事件处理函数
    handles = {
        EventType.STAY_DETECTION.value      : AlarmPlan.handle_stay_detection,
        EventType.RETENTION_DETECTION.value : AlarmPlan.handle_retention_detection,
        EventType.TOILETING_DETECTION.value : AlarmPlan.handle_toileting_detection,
        EventType.TOILETING_FREQUENCY.value : AlarmPlan.handle_toileting_frequency,
    }
    g_las.g_event_dispatcher.start(handles)


def start_alarm_plan_mgr():
    g_las.g_alarm_plan_mgr.start_scheduler(interval=1)



# 将region字典转换为xy平面的rect [left, top, width, height]
def region_to_rect(region: dict) -> list:
    x_start, x_stop = region["x_cm_start"], region["x_cm_stop"]
    y_start, y_stop = region["y_cm_start"], region["y_cm_stop"]

    left = min(x_start, x_stop)
    right = max(x_start, x_stop)
    top = min(y_start, y_stop)
    bottom = max(y_start, y_stop)

    width = right - left
    height = bottom - top

    return [left, top, width, height]

# 回调函数，处理查询结果：查询所有的告警计划信息
def cb_handle_query_all_alarm_plan_info(result):
    try:
        if result:
            for row in result:
                plan_uuid: str  = row["plan_uuid"]
                plan_name: str  = row["plan_name"]
                dev_id: str     = row["dev_id"]
                enable: int     = bool(row["enable"])
                # region          = row["region"]
                # rect            = json.loads(region_to_rect(region))
                rect: list      = json.loads(row["region"])
                threshold_time: int = row["threshold_time"]
                merge_time: int     = row["merge_time"]

                event_val: int   = row["event_val"]
                event_type      = event_val
                event_str: str   = row["event_str"]
                event_desc: str  = row["event_desc"]

                start_date  = row["start_date"]
                stop_date   = row["stop_date"]

                time_range  = json.loads(row["time_range"])
                month_days = None
                if row["month_days"]:
                    month_days = ast.literal_eval(row["mozhenth_days"])
                weekdays = None
                if row["weekdays"]:
                    weekdays = ast.literal_eval(row["weekdays"])

                time_plan = TimePlan(
                    time_range  = time_range,
                    start_date  = start_date,
                    stop_date   = stop_date,
                    weekdays    = weekdays,
                    month_days  = month_days
                )

                alarm_plan = AlarmPlan(
                    plan_uuid   = plan_uuid,
                    name        = plan_name,
                    dev_id      = dev_id,
                    enable      = enable,
                    time_plan   = time_plan,
                    rect        = rect,
                    event_type  = event_type,
                    threshold_time  = threshold_time,
                    merge_time  = merge_time
                )
                if alarm_plan.event_attr_ is None:
                    LOGERR(f"drop plan {plan_uuid}, invalid event_type: {event_type}")
                    continue


                # 更新设备信息
                g_las.g_alarm_plan_mgr.push(plan_uuid, alarm_plan)

            LOGDBG(f"cb_handle_query_all_alarm_plan_info succeed")
        else:
            LOGDBG("cb_handle_query_all_alarm_plan_info, invalid result")

    except json.JSONDecodeError as e:
        tb_info = traceback.extract_tb(e.__traceback__)
        for frame in tb_info:
            LOGERR(f"[{frame.filename}:{frame.lineno}] @{frame.name}(), error:{e}, {e.doc}")
    except Exception as e:
        tb_info = traceback.extract_tb(e.__traceback__)
        for frame in tb_info:
            LOGERR(f"[{frame.filename}:{frame.lineno}] @{frame.name}(), error: {e}")