package et_push

import (
	"encoding/json"
	"fmt"
	"gitea.anxinyun.cn/container/common_models"
	"gitea.anxinyun.cn/container/common_utils"
	"gitea.anxinyun.cn/container/common_utils/configLoad"
	"gitea.anxinyun.cn/container/common_utils/kafkaHelper"
	"log"
	"node/stages"
	"time"
)

type dataOut struct {
	topic       string
	Id          int            `json:"id"`
	Name        string         `json:"name"`
	Data        map[string]any `json:"data"`
	CollectTime time.Time      `json:"collect_time"`
}

type IPushClient interface {
	Publish(topic string, messageBytes []byte)
}

type PushHandler struct {
	stage       *stages.Stage
	pushClients []IPushClient
	dataQueue   []dataOut
	signBatch   chan bool
	batchCount  int
}

func (the *PushHandler) GetStage() stages.Stage {
	return *the.stage
}

func NewPushHandler() *PushHandler {
	the := &PushHandler{
		stage:      stages.NewStage("测点数据推送"),
		signBatch:  make(chan bool, 1),
		batchCount: 500,
	}
	the.addClients()
	go the.publishBatchMonitor()
	the.stage.AddProcess(the.push)
	return the
}

func (the *PushHandler) addClients() {
	mqttEnable := configLoad.LoadConfig().GetBool("push.mqtt.enable")
	if mqttEnable {
		mqttHost := configLoad.LoadConfig().GetString("push.mqtt.host")
		mqttPort := configLoad.LoadConfig().GetInt("push.mqtt.port") //clientIdPrefix
		clientIdPrefix := configLoad.LoadConfig().GetString("push.mqtt.clientIdPrefix")
		mq := common_utils.NewMqttHelper(
			mqttHost,
			mqttPort,
			fmt.Sprintf("%s-%s", clientIdPrefix, time.Now().Format("20060102-150405")),
			"",
			"",
			false,
		)
		the.pushClients = append(the.pushClients, mq)
	}
	kafkaEnable := configLoad.LoadConfig().GetBool("push.kafka.enable")
	if kafkaEnable {
		kafkaBrokers := configLoad.LoadConfig().GetStringSlice("push.kafka.brokers")
		ka := kafkaHelper.NewKafkaAsyncProducer(kafkaBrokers)
		the.pushClients = append(the.pushClients, ka)
	}
}
func (the *PushHandler) push(p *common_models.ProcessData) *common_models.ProcessData {
	if len(the.pushClients) == 0 {
		return p
	}

	for _, station := range p.Stations {
		dataPush := dataOut{
			topic:       fmt.Sprintf("etpush/%d/%d", station.Info.StructureId, station.Info.Id),
			Id:          station.Info.Id,
			Name:        station.Info.Name,
			Data:        station.Data.ThemeData,
			CollectTime: station.Data.CollectTime,
		}
		the.dataQueue = append(the.dataQueue, dataPush)
	}
	if len(the.dataQueue) >= the.batchCount {
		log.Printf("推送队列 len=%d > %d,触发 批信号", len(the.dataQueue), the.batchCount)
		the.signBatch <- true
	}
	return p
}

func (the *PushHandler) publish(dataArrayOut []dataOut) {
	for i, client := range the.pushClients {
		log.Printf("[client-%d]publish %d 条数据", i, len(dataArrayOut))
		for _, out := range dataArrayOut {
			outBytes, _ := json.Marshal(out)
			client.Publish(out.topic, outBytes)
		}
	}

}

func (the *PushHandler) publishBatchMonitor() {
	for {
		select {
		case <-the.signBatch:
			log.Printf("批推送信号,监控器收到")
		case <-time.After(200 * time.Millisecond):
		}
		if len(the.dataQueue) > 0 {
			log.Printf("推送队列长度=%d/%d", len(the.dataQueue), cap(the.dataQueue))
			count := len(the.dataQueue)
			needPush := the.dataQueue[:count]
			the.dataQueue = the.dataQueue[count:]
			go the.publish(needPush)
		}
	}
}