import os

import paho.mqtt.client as mqtt
import time

broker = '121.40.129.71'
port = 48835

print(os.getcwd())


with open("smp_coder/user.txt", "r") as f:
	user_id = f.read().strip()
	user_id = user_id.split("=")[-1]

# topic = "request/{}".format(user_id)

# 回调函数，当客户端收到连接响应时被调用
def on_connect(client, userdata, flags, rc, properties=None):
	print("连接结果: " + str(rc))
	# 订阅请求主题
	client.subscribe("request/{}".format(user_id), qos=2)

# 回调函数，当客户端收到消息时被调用
def on_message(client, userdata, msg):
	print("收到消息: " + msg.topic + " " + str(msg.payload))

	if msg.payload.decode() == "image produce": # 收到拍照请求
		# 打开相机，拍照，保存图片，发送图片
		if not os.path.exists("/tmp/image.jpg"):
			os.system("bash smp_coder/camera.sh")

		else:
			client.publish("response/{}".format(user_id), "image produce success!", qos=2)
			client.publish("image/{}".format(user_id), open("/tmp/image.jpg", "rb").read(), qos=2)
		# 全局变量，用于标记是否收到响应
			global response_received
			response_received = True

# 创建客户端实例
client = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2,)

# 设置回调函数
client.on_connect = on_connect
client.on_message = on_message

# 连接到MQTT代理
client.connect(broker, port,  60)

# 启动一个后台线程来处理网络流量和回调
client.loop_start()

# 发布消息


# 等待响应
response_received = False
while not response_received:
	print("等待响应...")
	time.sleep(2)


# 停止网络循环并断开连接
client.loop_stop()
client.disconnect()

print("收到响应，客户端退出。")

os.system("sudo myenv/bin/python3 smp_coder/extur_smp.py > logex.txt 2>&1 &")
print("启动树莓派拍照客户端成功。")