JourneyGPSTracker/app/src/main/java/com/flacksta/chef/journeygpstracker/TrackingService.kt

package com.flacksta.chef.journeygpstracker

import android.Manifest
import android.app.*
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.os.IBinder
import android.os.Looper
import android.util.Log
import androidx.core.app.ActivityCompat
import androidx.core.app.NotificationCompat
import androidx.core.content.ContextCompat
import com.google.android.gms.location.*

class TrackingService : Service() {

    private val mTag: String = "TrackingService"

    var counter = 0
    private lateinit var mFusedLocationClient: FusedLocationProviderClient
    private lateinit var mLocationRequest: LocationRequest
    private lateinit var mLocationCallback: LocationCallback


    override fun onCreate() {
        super.onCreate()
        Log.i(mTag,"onCreate()")
        generateForegroundNotification()
        startForeground(mNotificationId, notification)
        Log.i(mTag,"Requested foreground service...")
    }

    private fun requestLocationUpdates() {

        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this)
        mLocationRequest = LocationRequest.create().apply {
            interval = 2000
            fastestInterval = 2000
            //smallestDisplacement = 2.0f
            priority = LocationRequest.PRIORITY_HIGH_ACCURACY
        }

        mLocationCallback = object : LocationCallback() {
            override fun onLocationResult(locationResult: LocationResult?) {
                locationResult ?: return
                for (location in locationResult.locations){
                    counter += 1
                    val acc = location.accuracy
                    Log.i(mTag, "Got location: $counter  $acc")

                }
            }
        }

        val permission = ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
        if (permission == PackageManager.PERMISSION_GRANTED ) {
            mFusedLocationClient.requestLocationUpdates(mLocationRequest,
                    mLocationCallback,
                    Looper.getMainLooper())
        }
    }

    override fun onBind(intent: Intent): IBinder? {
        Log.i(mTag,"onBind()")
        return null
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        @Suppress("UNUSED_VARIABLE") val retVal: Int = super.onStartCommand(intent, flags, startId)
        Log.i(mTag,"onStartCommand()")
        requestLocationUpdates()
        return START_STICKY
    }

    private var iconNotification: Bitmap? = null
    private var notification: Notification? = null
    private var mNotificationManager: NotificationManager? = null
    private val mNotificationId = 123

    private fun generateForegroundNotification() {
        val intentMainLanding = Intent(this, MainScreenActivity::class.java)
        val pendingIntent =
                PendingIntent.getActivity(this, 0, intentMainLanding, PendingIntent.FLAG_IMMUTABLE)
        iconNotification = BitmapFactory.decodeResource(resources, R.mipmap.ic_launcher)
        if (mNotificationManager == null) {
            mNotificationManager = this.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        }

        assert(mNotificationManager != null)
        mNotificationManager?.createNotificationChannelGroup(
                NotificationChannelGroup("chats_group", "Chats")
        )
        val notificationChannel =
                NotificationChannel("service_channel", "Service Notifications",
                        NotificationManager.IMPORTANCE_MIN)
        notificationChannel.enableLights(false)
        notificationChannel.lockscreenVisibility = Notification.VISIBILITY_SECRET
        mNotificationManager?.createNotificationChannel(notificationChannel)

        val builder = NotificationCompat.Builder(this, "service_channel")

        builder.setContentTitle(StringBuilder(resources.getString(R.string.app_name)).append(" service is running").toString())
                .setTicker(StringBuilder(resources.getString(R.string.app_name)).append("service is running").toString())
                .setContentText("Touch to open") //                    , swipe down for more options.
                .setSmallIcon(R.drawable.ic_baseline_map_24)
                .setPriority(NotificationCompat.PRIORITY_LOW)
                .setWhen(0)
                .setOnlyAlertOnce(true)
                .setContentIntent(pendingIntent)
                .setOngoing(true)
        if (iconNotification != null) {
            builder.setLargeIcon(Bitmap.createScaledBitmap(iconNotification!!, 128, 128, false))
        }
        builder.color = ContextCompat.getColor(this, R.color.purple_200)
        builder.build().also { notification = it }
    }

    override fun onDestroy() {
        super.onDestroy()
        Log.i(mTag,"onDestroy()")
    }
}