import logging
import re
import time
import app
import main
import threading
import log
from typing import List
import OpenOPC
import _thread
import pythoncom
import win32com.client
from win32com.client import gencache

import win32timezone
from win32com.client import Dispatch
from win32com.client import DispatchWithEvents
import pywintypes
pywintypes.datetime = pywintypes.TimeType

class opc_server(threading.Thread):
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        self.user_var = app.user_var
        self.opcServer = OpenOPC.client()
        self.opcaddrlist = app.opc_value.opcaddrlist
        self.opc_value = app.opc_value
        self.rdkv = self.opc_value.opcrdkv
        self.wrkv = self.opc_value.opcwrkv
        self.wrstatkv = app.opc_value.opcwrstatkv
        self.exit_stat = False
        self.log_file = log.log_file
        self.log_print = log.log_file
        self.readtag_stat = False
        self.group = self.opc_value.stationgroup

    def OnDataChange(self, TransactionID, NumItems, ClientHandles, ItemValues, Qualities, TimeStamps):
        i = 0
        print("callback")
        while (i < NumItems):
            handle = ClientHandles[i]
            value = ItemValues[i]
            quality = Qualities[i]
            time = TimeStamps[i]
            print(
                'item:{0} , value:{1} , quality:{2}, time:{3}'.format(self.opcaddrlist[handle - 1], value, quality,
                                                                      time))
            self.rdkv[self.opcaddrlist[handle-1]] = value
            i = i + 1

    def connect_opc(self, progID: str):
        self.opcServer.connect(progID, 'localhost')
        self.log_print.logger.info('已连接到opc - [{}]'.format(progID))
        return self.opcServer


    def disconnect_opc(self, opcServer):
        self.log_print.logger.info('opc断开连接')
        self.opcServer.Disconnect()

    def asyn_write_items(self):
        write_list = []
        for key, value in self.wrstatkv.items():
            if value == True:
                write_tuple = (key, self.wrkv[key])
                write_list.append(write_tuple)
        if len(write_list) > 0:
            self.opcServer.write(write_list)

    def opc_start(self):
        opc_conn = False
        wr_stat = True
        self.opcServer = OpenOPC.client()
        self.opcServer = self.connect_opc('Kepware.KEPServerEX.V6')
        opc_conn = True
        try:
            while self.exit_stat == False:
                if self.readtag_stat == False:
                    self.readtag_stat = True
                    count = 0
                    listvalue = self.opcServer.read(self.opcaddrlist, include_error=True)
                    with main.threadlock:
                        for tup in listvalue:
                            if tup[2] == 'Good':
                                self.rdkv[tup[0]] = tup[1]
                            elif tup[2] == 'Error' or tup[2] == 'Bad':
                                count = count + 1
                    if count >= len(listvalue):
                        self.user_var.opc_conn_stat = "PLC未连接"
                    else:
                        self.user_var.opc_conn_stat = "PLC已连接"
                    self.readtag_stat = False
                with main.threadlock:
                    try:
                        self.asyn_write_items()
                        wr_stat = True
                    except Exception as e:
                        if wr_stat == True:
                            wr_stat = False
                            self.log_file.logger.error('opc写异常: {0}'.format(e), exc_info=True,
                                                   stack_info=True)
                        break
                time.sleep(0.01)
        except Exception as e:
            self.log_file.logger.error('opc工作异常: {0}'.format(e), exc_info=True, stack_info=True)
        finally:
            self.opcServer.close()
        if(opc_conn==False):
            self.user_var.opc_conn_stat = "OPC服务器未连接"

    def exit(self):
        self.exit_stat = True

    def run(self):
        # pythoncom.CoInitialize()
        while self.exit_stat == False:
            time.sleep(1)
            self.opc_start()
        print("opc进程结束!")