package MqttServer

import (
	"fmt"
	beego "github.com/beego/beego/v2/server/web"
	"github.com/yosssi/gmq/mqtt"
	"github.com/yosssi/gmq/mqtt/client"
	"log"
	"math/rand"
	"strings"
	"time"
)

var (
	mqtt_suffix,
	mqtt_port,
	mqtt_username,
	mqtt_password string
	err error
)

func init() {
	mqtt_suffix, err = beego.AppConfig.String("Mqtt_suffix")
	mqtt_port, err = beego.AppConfig.String("Mqtt_port")
	mqtt_username, err = beego.AppConfig.String("Mqtt_username")
	mqtt_password, err = beego.AppConfig.String("Mqtt_password")
}

// GetConnectionOptions 获取链接参数

func GetMqttClient(mqttAddrPrefix string) *client.Client {
	r := rand.New(rand.NewSource(time.Now().Unix()))
	options := client.ConnectOptions{
		Network:  "tcp",
		Address:  fmt.Sprintf("%s.coldbaozhida.com:1883", mqttAddrPrefix),
		UserName: []byte(mqtt_username),
		Password: []byte(mqtt_password),
		ClientID: []byte(fmt.Sprintf("ColdP_server_%d", r.Intn(9))),
	}
	cli := client.New(&client.Options{ErrorHandler: func(e error) {
		fmt.Println("PubMqtt Error 发布信息错误：", e.Error())
	}})
	err = cli.Connect(&options)
	if err != nil {
		fmt.Println("MQTT 连接失败", err.Error())
	}
	return cli
}

// PubMqttMessage 发送信息
func PubMqttMessage(cli *client.Client, topic string, msg []byte) {
	fmt.Printf("发布主题：%s -> 发布内容：%s\n", topic, string(msg))
	time.Sleep(time.Second)
	err = cli.Publish(&client.PublishOptions{
		QoS:       mqtt.QoS0,
		TopicName: []byte(topic),
		Message:   msg,
	})
	if err != nil {
		log.Panicln("Mqtt发布失败", err.Error())
		return
	}
	fmt.Println("MQTT发送成功！")
}

// Subscript 订阅信息
func Subscript(cli *client.Client, topic string, msg chan string, is_str string) {
	fmt.Println("连接成功", time.Now().Format("2006-01-02 15:04:05"))
	fmt.Printf("订阅主题：%s\n", topic)
	cli.Subscribe(&client.SubscribeOptions{
		SubReqs: []*client.SubReq{
			&client.SubReq{
				TopicFilter: []byte(topic),
				QoS:         mqtt.QoS0,
				Handler: func(topicName, message []byte) {
					//如果管道已经关闭，表示已经超时
					fmt.Println("MQTT接收到信息：", string(message))
					if strings.Contains(strings.Replace(string(message), " ", "", -1), is_str) {
						msg <- topic + "||" + string(message)
						if _, ok := <-msg; !ok {
							cli.Disconnect()
							cli.Terminate()
						}
					}

				},
			},
		},
	})
}