import json
import time

import paho.mqtt.client as mqtt

from tool import *
from config import broker, port, subscribe_topic, username, password, info_topic

times = 6


class DataUploadClient:
    def __init__(self, broker, port, topic, username, password):
        self.broker = broker
        self.port = port
        self.topic = topic
        self.username = username
        self.password = password
        # 千万不要指定client_id 不然死翘翘
        self.client = mqtt.Client()
        self.client.username_pw_set(self.username, self.password)
        self.client.on_connect = self.on_connect
        self.client.on_disconnect = self.on_disconnect

    def on_connect(self, client, userdata, flags, rc):
        global times
        times = 6
        self.client.publish(info_topic, payload=json.dumps(subscribe_topic + ':连接成功，执行数据推送和本地存储'), qos=0)
        subprocess.Popen(['/usr/bin/bash /home/pi/lot_manager/bash/start_data_upload.sh'], shell=True)

    def on_disconnect(self, client, userdata, rc):
        # print("失败，执行本地存储")
        subprocess.Popen(['/usr/bin/bash /home/pi/lot_manager/bash/stop_data_upload.sh'], shell=True)

    def start(self):
        self.client.connect(self.broker, self.port)


if __name__ == '__main__':
    MQTT = DataUploadClient(broker, port, subscribe_topic, username, password)
    while True:
        try:
            MQTT.start()
            MQTT.client.loop_forever()
        except:
            time.sleep(10)
            if times == 0:
                MQTT.on_disconnect(None, None, None)
            times -= 1