package main

import (
	"fmt"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/google/uuid"
	"github.com/mmadfox/go-gpsgen"
)

const (
	numTracksPerRoute = 3
	numTrackers       = 1000
	flushInterval     = 3 * time.Second
)

func main() {
	lon := 37.625616307117696
	lat := 55.75350460378772

	genOpts := gpsgen.NewOptions()
	genOpts.Interval = flushInterval
	gen := gpsgen.New(genOpts)

	// For network transmission
	gen.OnPacket(func(b []byte) {
		// udp.send(b)
	})

	gen.OnError(func(err error) {
		fmt.Println("[ERROR]", err)
	})

	gen.OnNext(func() {
		fmt.Println("tracker state changed successfully")
	})

    // Generate random routes
	for i := 0; i < numTrackers; i++ {
		tracker := gpsgen.NewTracker()
		tracker.SetUserID(uuid.NewString())
		route := gpsgen.RandomRoute(lon, lat, numTracksPerRoute, gpsgen.RouteLevelM)
		tracker.AddRoute(route)
		gen.Attach(tracker)
	}

	terminate(func() {
		gen.Close()
	})

	gen.Run()
}

func terminate(fn func()) {
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan,
		syscall.SIGHUP,
		syscall.SIGINT,
		syscall.SIGTERM,
		syscall.SIGQUIT)
	go func() {
		<-sigChan
		fn()
	}()
}

tracker := gpsgen.NewDroneTracker()

route, err := gpsgen.DecodeGeoJSONRoutes(geoJSONBytes)
if err != nil {
	panic(err)
}

tracker.AddRoute(route...)
// ...

tracker := gpsgen.NewDroneTracker()

route, err := gpsgen.DecodeGPXRoutes(GPXBytes)
if err != nil {
	panic(err)
}

tracker.AddRoute(route...)
// ...

tracker := gpsgen.NewDroneTracker()

// lon, lat, numTracks, zoomLevel
lon := 28.31261399982
lat := 53.247483804819666
numTracks := 2

route := gpsgen.RandomRoute(lon, lat, numTracks, gpsgen.RouteLevelXL)

tracker.AddRoute(route...)
// ...

// types.WithSensorStartMode: Generation starts from the minimum value of 1 to 10
// types.WithSensorEndMode:   Generation ends at the minimum value from 10 to 1
// types.WithSensorRandomMode: Data generation follows a Bezier curve from 1 to 10

minValue := 1
maxValue := 10
amplitude := 16 // 4 - 512

s1, err := gpsgen.NewSensor("s1", minValue, maxValue, amplitude, types.WithSensorStartMode|types.WithSensorRandomMode|types.WithSensorEndMode)
if err != nil {
	panic(err)
}

droneTracker.AddSensor(s1)
s2, err := gpsgen.NewSensor("s2", 10, 20, 16, types.WithSensorRandomMode|types.WithSensorEndMode)
if err != nil {
	panic(err)
}
droneTracker.AddSensor(s2)
s3, err := gpsgen.NewSensor("s3", 20, 30, 16, 0)
if err != nil {
	panic(err)
}
droneTracker.AddSensor(s3)
// ...