package nodes

import (
	"encoding/json"
	"github.com/gogf/gf/encoding/gjson"
	"github.com/gogf/gf/os/grpool"
	"github.com/influxdata/influxdb-client-go/v2"
	"github.com/influxdata/influxdb-client-go/v2/api"
	"sparrow/pkg/protocol"
	"sparrow/pkg/ruleEngine"
	"sparrow/pkg/server"
	"time"
)

type InfluxDBConfig struct {
	URL           string            `json:"url"`         // 数据库地址
	Token         string            `json:"token"`       // 连接Token
	Org           string            `json:"org"`         // 组织名称
	Bucket        string            `json:"bucket"`      // Bucket
	Measurement   string            `json:"measurement"` // 度量名称
	Tags          map[string]string `json:"tags"`        // 索引Tag
	DataFieldName string            `json:"data_fields"` // 数据字段名称
}

// InfluxDBNode influxDB写入节点
// 消息中的MeteData字段会合并到Tags中
type InfluxDBNode struct {
	config   *InfluxDBConfig
	writeApi api.WriteAPI
	pool     *grpool.Pool
}

func (i *InfluxDBNode) Init(ctx ruleEngine.Context, config string) error {
	if config != "" {
		c := new(InfluxDBConfig)
		err := json.Unmarshal([]byte(config), c)
		if err != nil {
			return err
		}
		i.config = c
	}
	i.pool = grpool.New(10)
	client := influxdb2.NewClient(i.config.URL, i.config.Token)
	i.writeApi = client.WriteAPI(i.config.Org, i.config.Bucket)
	return nil
}

func (i *InfluxDBNode) OnMessage(ctx ruleEngine.Context, message *protocol.Message) error {
	for k, v := range message.MetaData {
		i.config.Tags[k] = v.(string)
	}
	jsonData, err := gjson.DecodeToJson(message.Data)
	if err != nil {
		server.Log.Error(err)
		return err
	}
	fields := jsonData.GetMap(i.config.DataFieldName)
	if fields != nil {
		point := influxdb2.NewPoint(i.config.Measurement, i.config.Tags, fields, time.Now())
		err = i.pool.Add(func() {
			i.writeApi.WritePoint(point)
		})
		if err != nil {
			server.Log.Error(err)
			return err
		}
	}
	ctx.TellSuccess(message)
	return nil
}