import json

import paho.mqtt.client as mqtt

from tool import push_stream, close_stream, update, exec_sh


class MQTT:
    def on_connect(self, client, userdata, flags, rc):
        if rc == 0:
            client.subscribe('lot_mqtt')

    # Message receiving callback
    def on_message(self, client, userdata, msg):
        data = json.loads(msg.payload.decode('utf-8'))["msg"]
        if data == "push_stream":
            # 启动推流视频
            push_stream()
            client.publish('success', payload='push_stream success', qos=0)
        elif data == "close_stream":
            # 关闭推流视频
            close_stream()
            client.publish('success', payload='close_stream success', qos=0)
        elif data == "exec":
            #  执行命令
            exec_sh(msg)
            client.publish('success', payload='exec_sh success', qos=0)
        elif data == "update":
            #  git更新项目和配置文件
            update()
            client.publish('success', payload='update success', qos=0)
        else:
            client.publish('error', payload='No Such Type', qos=0)

    def __init__(self):
        self.client = mqtt.Client()
        self.client.username_pw_set("demo", "123456")
        # Specify callback function
        self.client.on_connect = self.on_connect
        self.client.on_message = self.on_message
        # Establish a connection
        self.client.connect('ceshi-mqtt.lihaink.cn', 1883)
        # Publish a message
        self.client.loop_forever(retry_first_connection=True)


if __name__ == '__main__':
    mq = MQTT()