package main

import (
	"encoding/json"
	"fmt"
	"os"
	"time"

	mqtt "github.com/eclipse/paho.mqtt.golang"
)

func main() {
	broker := "wss://broker.emqx.io:8084/mqtt"
	clientID := "Mqttx_07c4e9ed"
	username := "1"
	password := "1"
	topic := "$dp"

	opts := mqtt.NewClientOptions()
	opts.AddBroker(broker)
	opts.SetClientID(clientID)
	opts.SetUsername(username)
	opts.SetPassword(password)
	opts.SetProtocolVersion(4)
	opts.SetKeepAlive(60 * time.Second)
	opts.SetAutoReconnect(true)
	opts.SetCleanSession(true)

	c := mqtt.NewClient(opts)
	if t := c.Connect(); t.Wait() && t.Error() != nil {
		fmt.Printf("connect error: %v\n", t.Error())
		os.Exit(1)
	}
	defer c.Disconnect(250)

	// 构造所需数据格式（仅设备与时间变更）
	payload := map[string]any{
		"type":   "hws",
		"device": "Z866",
		"Dm":     0.0001,
		"Pa":     976.7,
		"Rc":     0,
		"Sm":     0.0001,
		"Ta":     39,
		"Ua":     26.6,
		"time":   time.Now().UnixMilli(),
	}
	b, _ := json.Marshal(payload)
	if t := c.Publish(topic, 1, false, b); t.Wait() && t.Error() != nil {
		fmt.Printf("publish error: %v\n", t.Error())
		os.Exit(2)
	}
	fmt.Println("published to", topic)
}