import json
import time

import paho.mqtt.client as mqtt

from device import device_name
from tool import *


def valid(msg, client):
    origin_data = json.loads(msg.payload.decode('utf-8'))
    if 'msg' not in origin_data:
        client.publish('error', payload='msg must be supplied', qos=0)
        return False
    if 'device_name' not in origin_data:
        client.publish('error', payload='device_name must be supplied', qos=0)
        return False
    if device_name != origin_data['device_name']:
        return False
    return True


class MQTTClient:
    def __init__(self, broker, port, topic):
        self.broker = broker
        self.port = port
        self.topic = topic
        self.client = mqtt.Client()
        self.client.on_connect = self.on_connect
        self.client.on_message = self.on_message

    def on_connect(self, client, userdata, flags, rc):
        self.client.subscribe(self.topic)
        client.publish('success', payload='成功订阅lot_mqtt' + str(time.time()), qos=0)

    def on_message(self, client, userdata, msg):
        if not valid(msg, client):
            client.publish('error', payload='验证失败', qos=0)
            return
        client.publish('success', payload='验证通过', qos=0)
        try:
            origin_data = json.loads(msg.payload.decode('utf-8'))
            data = origin_data["msg"]
            if data == "push_stream":
                # 启动推流视频
                push_stream(client)
            elif data == "close_stream":
                # 关闭推流视频
                close_stream(client)
            elif data == "exec":
                #  执行命令
                exec_sh(msg, client)
            elif data == "update":
                #  git更新项目和配置文件
                update(client)
            elif data == "record_list":
                # 查看录像列表
                get_list_record()
            elif data == "record":
                # 获取录像
                get_record(msg, client)
            elif data == "status":
                # 查看运行状态
                get_status(client)
            else:
                # 错误类型
                client.publish('error', payload='No Such Type', qos=0)
        except Exception as e:
            pass

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


if __name__ == '__main__':
    MQTT = MQTTClient('192.168.1.27', 1883, 'lot_mqtt')
    while True:
        try:
            MQTT.start()
            MQTT.client.loop_forever()
        except:
            time.sleep(15)