from PySide6.QtCore import QTimer, Signal, QObject  # 导入Qt核心类
from PySide6.QtWidgets import QApplication  # 用于获取主线程
import threading 
from hardware import transmitter
from view.main_window import MainWindow
from .camera_controller import CameraController
from .bottom_control_controller import BottomControlController
from hardware.transmitter import TransmitterController
from hardware.relay import RelayController

# 定义信号类（用于后台线程向 UI主线程传递数据）
class Signals(QObject):
    weight_updated = Signal(int)  # 传递上料斗重量

class MainController:
    def __init__(self):
        # 主界面
        self.main_window = MainWindow()
        
        # 1. 用于更新下料斗夹爪角度的QTimer
        self.timer_angle = QTimer()
        self.timer_angle.setInterval(1000)  # 1秒触发一次
        self.timer_angle.timeout.connect(self._onTimer2)  # 连接到角度更新函数
        self.timer_angle.start()
        
        # 下料斗夹具角度相关参数
        self.angle = 10
        self.max_angle = 60
        self.min_angle = 10
        self.is_add = True
        
        # 2. 用于更新重量的 QTimer
        self.timer_weight = QTimer()
        self.timer_weight.setInterval(2000)  # 2秒触发一次
        self.timer_weight.timeout.connect(self._read_weight_in_background) 
        self.timer_weight.start()
        
        # 信号实例（用于后台线程传递数据到主线程）
        self.signals = Signals()
        self.signals.weight_updated.connect(self._update_upper_weight)  # 主线程更新UI
        
        # 初始化子界面和控制器
        self._initSubViews()
        self._initSubControllers()

    def _read_weight_in_background(self):
        """在后台线程中读取重量"""
        def weight_task():
            loc_tra = TransmitterController(RelayController())
            # 上料斗重量 (目前只有上料斗安装变送器， 可以读取到重量)
            upper_weight = loc_tra.read_data(1)  
            # 发送信号到主线程更新UI
            if upper_weight is not None:
                self.signals.weight_updated.emit(upper_weight)
        
        # 启动后台线程执行重量读取操作
        threading.Thread(target=weight_task, daemon=True).start()

    def _update_upper_weight(self, weight):
        """主线程中 更新界面上料斗重量数据"""
        self.main_window.hopper_widget.setUpperHopperWeight(weight)

    def _onTimer2(self):
        """QTimer触发的 料斗夹爪角度更新"""
        if self.is_add:
            self.angle += 1
        else:
            self.angle -= 1
        
        if self.angle > self.max_angle:
            self.is_add = False
            self.angle = self.max_angle
        if self.angle <= self.min_angle:
            self.is_add = True
            self.angle = 10
        
        # 直接更新UI
        self.main_window.hopper_widget.setLowerHopperOpeningAngle(self.angle)

    def showMainWindow(self):
        self.main_window.showFullScreen()
        self.main_window.dispatch_task_widget.set_task_time("task1","15:44 PM")
        self.main_window.dispatch_task_widget.set_task_time("task2","17:37 PM")
        self.main_window.segment_task_widget.set_task_time("task1","15:38 PM")
        self.main_window.segment_task_widget.set_task_time("task2","17:24 PM")

    def _initSubControllers(self):
        self.camera_controller = CameraController(
            video_view=self.main_window.vibration_video
        )
        self.bottom_control_controller = BottomControlController(
            bottom_control_widget=self.main_window.bottom_control_widget,
            main_window=self.main_window
        )

    def _initSubViews(self):
        pass