package main

import (
	"bytes"
	"encoding/json"
	"flag"
	"fmt"
	"iot-spray-equipment/mqttx"
	"net/http"
	"os"
	"time"

	mqtt "github.com/eclipse/paho.mqtt.golang"
	"github.com/gin-gonic/gin"
	log "github.com/sirupsen/logrus"
	"github.com/spf13/viper"
)

var (
	configFilePath string
)

func init() {
	flag.StringVar(&configFilePath, "config", "config.yml", "配置文件")

	buf, err := os.ReadFile(configFilePath)
	if err != nil {
		log.Fatal(err)
	}
	viper.SetConfigType("yaml")
	if err := viper.ReadConfig(bytes.NewBuffer(buf)); err != nil {
		log.Fatal(err)
	}

	c := mqttx.NewClient(&mqttx.ClientOptions{
		Host: viper.GetString("mqtt.host"),
		Port: viper.GetInt("mqtt.port"),
		ClientOptions: mqtt.ClientOptions{
			ClientID: viper.GetString("mqtt.client_id"),
			Username: viper.GetString("mqtt.username"),
			Password: viper.GetString("mqtt.password"),
			OnConnect: func(c mqtt.Client) {
				log.Info("mqtt: 服务器连接成功")
			},
			OnConnectionLost: func(c mqtt.Client, err error) {
				log.Warningf("mqtt: 服务器连接断开: %v", err.Error())
			},
			OnReconnecting: func(c mqtt.Client, co *mqtt.ClientOptions) {
				log.Info("mqtt: 重连服务器...")
			},
		},
	})
	mqttx.Push(c)
}

func main() {
	go func() {
		c, err := mqttx.Get(viper.GetString("mqtt.client_id"))
		if err != nil {
			log.WithFields(log.Fields{
				"error": err,
			}).Error("mqtt: 客户端获取失败")
			return
		}

	RetryConnect:
		if err := c.Connect(); err != nil {
			log.WithFields(log.Fields{
				"error": err,
			}).Error("mqtt: 服务器连接失败")
			time.Sleep(200 * time.Millisecond)
			goto RetryConnect
		}

	RetrySubscribe:
		subTopic := mqttx.SubscribeTopic{
			Name:           "testtopic/PLC325454756",
			Qos:            0,
			MessageHandler: func(c mqtt.Client, m mqtt.Message) {},
			WaitTimeout:    5 * time.Second,
		}
		if err := c.Subscribe(subTopic); err != nil {
			log.WithFields(log.Fields{
				"topic": subTopic.Name,
				"error": err,
			}).Error("mqtt: 话题订阅失败")
			time.Sleep(200 * time.Millisecond)
			goto RetrySubscribe
		}

		pubTopic := mqttx.PublishTopic{
			Name:        "testtopic/325454756",
			Qos:         0,
			Retained:    false,
			Payload:     `{"KEY1":0}`,
			WaitTimeout: 5 * time.Second,
		}
		for {
			if err := c.Publish(pubTopic); err != nil {
				log.WithFields(log.Fields{
					"topic": pubTopic.Name,
					"error": err,
				}).Error("mqtt: 话题发送失败")
			}
			<-time.After(5 * time.Second)
		}
	}()

	r := gin.Default()
	r.GET("/status", StatusHandler)
	r.POST("/mqtt", MqttHandler)
	r.Run()
}

func StatusHandler(c *gin.Context) {
	//
}

func MqttHandler(c *gin.Context) {
	var input struct {
		Speed1 *uint8 `json:"speed1" binding:"required,gte=0,lte=100"` // 喷雾量(百分比): 0-100
		Speed2 *uint8 `json:"speed2" binding:"required,gte=0,lte=100"` // 喷雾量(百分比): 0-100
		YV1    *uint8 `json:"yv1" binding:"required"`                  // 电磁阀1: 0 关闭, 1 启动
		YV2    *uint8 `json:"yv2" binding:"required"`                  // 电磁阀2: 0 关闭, 1 启动
	}
	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"errcode": 400, "errmsg": err.Error()})
		return
	}

	payload := make(map[string]interface{})
	payload["KEY1"] = 2
	payload["Speed1"] = input.Speed1
	payload["Speed2"] = input.Speed2
	payload["YV1"] = input.YV1
	payload["YV2"] = input.YV2

	buf, _ := json.Marshal(payload)

	topic := mqttx.PublishTopic{
		Name:        "testtopic/325454756",
		Qos:         0,
		Retained:    false,
		Payload:     buf,
		WaitTimeout: 5 * time.Second,
	}

	if mc, err := mqttx.Get(viper.GetString("mqtt.client_id")); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"errcode": 10001, "errmsg": fmt.Sprintf("mqtt: %v", err)})
		return
	} else if err := mc.Publish(topic); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"errcode": 10002, "errmsg": fmt.Sprintf("mqtt: %v", err)})
		return
	}

	c.JSON(http.StatusOK, gin.H{"msg": "ok"})
}