import time

import paho.mqtt.client as mqtt

from tool import *

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


def valid(msg, client):
    origin_data = json.loads(msg.payload.decode('utf-8'))
    if 'msg' not in origin_data:
        client.publish(info_topic, payload=publish_payload(code=404, msg="msg must be supplied"), qos=0)
        return False
    return True


class MQTTClient:
    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(client_id=subscribe_topic)
        self.client.username_pw_set(self.username, self.password)
        self.client.on_connect = self.on_connect
        self.client.on_message = self.on_message

    def on_connect(self, client, userdata, flags, rc):
        if rc == 0:
            self.client.subscribe(self.topic)
            client.publish(info_topic, payload=publish_payload(code=200, msg='成功订阅' + self.topic),
                           qos=0)
            subprocess.Popen(['/bin/bash /home/pi/agri_xumu/bash/start_push_stream.sh'], shell=True)

    def on_message(self, client, userdata, msg):
        if not valid(msg, client):
            return
        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 == "reload":
                #  重启配置
                reload(client)
            elif data == "status":
                # 查看运行状态
                get_status(client)
            else:
                # 错误类型
                client.publish(info_topic, payload=publish_payload(code=404, msg='No Such Msg Type'), qos=0)
        except Exception as e:
            pass

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


if __name__ == '__main__':
    # MQTT客户端
    MQTT = MQTTClient(broker, port, subscribe_topic, username, password)
    # 循环连接
    while True:
        try:
            MQTT.start()
            # 阻塞监听
            MQTT.client.loop_forever()
        except Exception as e:
            # 异常等待时间在进行连接
            subprocess.Popen(['/bin/bash /home/pi/agri_xumu/bash/stop_push_stream.sh'], shell=True)
            time.sleep(30)