package main

import (
	"context"
	"fmt"
	"log"
	"net/url"
	"time"

	"github.com/eclipse/paho.golang/autopaho"
	"github.com/eclipse/paho.golang/autopaho/extensions/rpc"
	"github.com/eclipse/paho.golang/paho"
	"google.golang.org/protobuf/proto"
	"joylink.club/iot/dto"
	"joylink.club/iot/mqtt"
)

// 作为子系统使用方式

func main() {
	clientId := "iotlogreq_test"
	logReqTopic := mqtt.GetLogReqTopic()
	cliCfg := getCmConfig(clientId, logReqTopic)

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	cm, err := autopaho.NewConnection(ctx, cliCfg)
	if err != nil {
		panic(err)
	}
	h, err := rpc.NewHandler(ctx, rpc.HandlerOpts{
		Conn:             cm,
		Router:           cliCfg.Router,
		ResponseTopicFmt: "%s/iotlogresp",
		ClientID:         clientId,
	})
	if err != nil {
		log.Fatal(err)
	}

	req := &dto.IotServiceLogReq{
		Count: 10,
	}
	b, err := proto.Marshal(req)
	if err != nil {
		log.Fatal(err)
	}
	resp, err := h.Request(ctx, &paho.Publish{
		Topic:   logReqTopic,
		Payload: b,
	})
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("请求结果: %v\n", resp)
}

func getCmConfig(clientId, logReqTopic string) autopaho.ClientConfig {
	addr, _ := url.Parse("tcp://192.168.3.233:1883")
	cc := autopaho.ClientConfig{
		BrokerUrls: []*url.URL{addr},
		KeepAlive:  60,
		OnConnectionUp: func(cm *autopaho.ConnectionManager, connAck *paho.Connack) {
			fmt.Println("mqtt connection up")
			ctx, cancel := context.WithTimeout(context.Background(), time.Duration(5*time.Second))
			defer cancel()
			if _, err := cm.Subscribe(ctx, &paho.Subscribe{
				Subscriptions: []paho.SubscribeOptions{
					{Topic: logReqTopic, QoS: 0},
				},
			}); err != nil {
				fmt.Printf("failed to subscribe (%s). This is likely to mean no messages will be received.", err)
				return
			}
			fmt.Println("mqtt subscription made")
		},
		OnConnectError: func(err error) { fmt.Printf("error whilst attempting connection: %s\n", err) },
		ClientConfig: paho.ClientConfig{
			ClientID:      clientId,
			Router:        paho.NewStandardRouter(),
			OnClientError: func(err error) { fmt.Printf("%s requested disconnect: %s\n", clientId, err) },
			OnServerDisconnect: func(d *paho.Disconnect) {
				if d.Properties != nil {
					fmt.Printf("%s requested disconnect: %s\n", clientId, d.Properties.ReasonString)
				} else {
					fmt.Printf("%s requested disconnect; reason code: %d\n", clientId, d.ReasonCode)
				}
			},
		},
	}
	cc.SetUsernamePassword("rtsts_service", []byte("joylink@0503"))
	return cc
}