package cmd

import (
	"context"
	"os"
	"time"

	"git.ocjtech.us/jeff/ble-sensors/lib/bluetooth"
	cleargrass "git.ocjtech.us/jeff/ble-sensors/lib/cleargrass"
	xiaomi_mijia "git.ocjtech.us/jeff/ble-sensors/lib/xiaomi/mijia"
	xiaomi_scale "git.ocjtech.us/jeff/ble-sensors/lib/xiaomi/scale"
	"github.com/go-ble/ble"
	"github.com/go-ble/ble/linux"
	influxdb2 "github.com/influxdata/influxdb-client-go"
	influxdb2_api "github.com/influxdata/influxdb-client-go/api"
	"github.com/pkg/errors"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"go.uber.org/zap"
)

// listenCmd represents the listen command
var listenCmd = &cobra.Command{
	Use:   "listen",
	Short: "A brief description of your command",
	Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:

Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
	Run: listen,
}

func init() {
	rootCmd.AddCommand(listenCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// listenCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:

}

var client influxdb2.Client
var writeAPI influxdb2_api.WriteAPI

func listen(cmd *cobra.Command, args []string) {
	logger.Debug("starting up")

	d, err := linux.NewDevice(ble.OptDeviceID(0))
	if err != nil {
		logger.Fatal("can't get new device",
			zap.String("error", err.Error()))
	}

	serverURL := viper.GetString("influxdb2.server_url")
	token := viper.GetString("influxdb2.token")
	organization := viper.GetString("influxdb2.organization")
	bucket := viper.GetString("influxdb2.bucket")

	client = influxdb2.NewClientWithOptions(serverURL, token, influxdb2.DefaultOptions().SetBatchSize(20))
	writeAPI = client.WriteAPI(organization, bucket)

	ctx := ble.WithSigHandler(context.WithCancel(context.Background()))
	chkErr(logger, d.Scan(ctx, true, advHandler))

	writeAPI.Flush()
	client.Close()
	logger.Sync()
}

var tileUUID ble.UUID = []byte{0xed, 0xfe}
var nestUUID ble.UUID = []byte{0xaf, 0xfe}

var detector, _ = os.Hostname()

func advHandler(advertisement ble.Advertisement) {
	timestamp := time.Now()
	description := bluetooth.GetDescription(advertisement.Addr())

	point := influxdb2.NewPointWithMeasurement("rssi")
	point.SetTime(timestamp)
	if detector != "" {
		point.AddTag("detector", detector)
	}
	point.AddTag("address", advertisement.Addr().String())
	if description != "" {
		point.AddTag("description", description)
	}
	point.AddTag("unit", "dBm")
	point.AddField("value", advertisement.RSSI())
	writeAPI.WritePoint(point)

	logger.Debug("sending sensor reading",
		zap.String("source", advertisement.Addr().String()),
		zap.String("description", description),
		zap.String("measurement", "rssi"),
		zap.String("measurement_unit", "dBm"),
		zap.Int("value", advertisement.RSSI()))

	if len(advertisement.ServiceData()) > 0 {
		for index, sd := range advertisement.ServiceData() {
			switch {
			case sd.UUID.Equal(xiaomi_scale.XiaomiScaleV1UUID):
				xiaomi_scale.ParseXiaomiScaleV1(&writeAPI, logger, timestamp, detector, description, advertisement, index, sd)

			case sd.UUID.Equal(xiaomi_scale.XiaomiScaleV2UUID):
				xiaomi_scale.ParseXiaomiScaleV2(&writeAPI, logger, timestamp, detector, description, advertisement, index, sd)

			case sd.UUID.Equal(xiaomi_mijia.XiaomiMijiaHTV1UUID):
				xiaomi_mijia.ParseXiaomiMijiaSensorData(&writeAPI, logger, timestamp, detector, description, advertisement, index, sd)

			case sd.UUID.Equal(cleargrass.CleargrassUUID):
				cleargrass.ParseCleargrassSensorData(&writeAPI, logger, timestamp, detector, description, advertisement, index, sd)

			case sd.UUID.Equal(tileUUID):
				logger.Debug("ignoring tile ble advertisement",
					zap.String("source", advertisement.Addr().String()),
					zap.String("description", description),
					zap.String("name", advertisement.LocalName()),
					zap.String("uuid", sd.UUID.String()))

			case sd.UUID.Equal(nestUUID):
				logger.Debug("ignoring nest ble advertisement",
					zap.String("source", advertisement.Addr().String()),
					zap.String("description", description),
					zap.String("name", advertisement.LocalName()),
					zap.String("uuid", sd.UUID.String()))

			default:
				logger.Info("unknown service data type",
					zap.String("source", advertisement.Addr().String()),
					zap.String("description", description),
					zap.String("name", advertisement.LocalName()),
					zap.String("uuid", sd.UUID.String()),
					zap.Binary("data", sd.Data))
			}
		}
	}
}

func chkErr(logger *zap.Logger, err error) {
	logger.Debug("chkErr")
	switch errors.Cause(err) {
	case nil:
	case context.DeadlineExceeded:
		logger.Debug("done")
	case context.Canceled:
		logger.Debug("canceled")
	default:
		logger.Fatal("error",
			zap.String("error", err.Error()))
	}
}