using System;
using Android;
using Android.App;
using Android.Content;
using Android.Content.PM;
using Android.Locations;
using Android.OS;
using Android.Runtime;
using Android.Widget;

namespace Shared
{
    /// <summary>
    /// GPS 后台定位
    /// </summary>
    [Service]
    public class GPSLocationService:Service
    {
        public override IBinder OnBind(Intent intent)
        {
            return null;
        }

        public override void OnCreate()
        {
            base.OnCreate();
            if (BaseActivity.IsEnnableGPS)
            {
                (Shared.Application.Activity as BaseActivity).SetGPSLocationPermission(result =>
                {
                    if (result)
                    {
                        initLocation();
                        notification();
                    }
                });
            }
        }

        [Obsolete]
        void notification()
        {
            if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.O)
            {
                var mNotificationUtils = new NotificationUtils(this);
                var notificationIntent = new Intent(this, typeof(BaseActivity));
                var pendingIntent = PendingIntent.GetActivity(this, 3,
                        notificationIntent, PendingIntentFlags.CancelCurrent);

                var builder = mNotificationUtils.getAndroidChannelNotification
                        (Language.CurrentLanguage == "Chinese"?"获取定位信息":"Get Location Information", "", pendingIntent);
                StartForeground(1, builder.Build());//id must not be 0,即禁止是0
            }
        }

        class NotificationUtils :Notification.Builder
        {

            private NotificationManager mManager;
            public static string channelId = "85521566";
            public static string channelName = "HDLChanneName";
            private Context context;

            [Obsolete]
            public NotificationUtils(Context context) : base(context)
            {
                this.context = context;
                createChannels();
            }

            public void createChannels()
            {
                // create android channel
                if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.O)
                {
                    var androidChannel = new NotificationChannel(channelId,
                              context.PackageName, NotificationImportance.High);
                    // Sets whether notifications posted to this channel should display notification lights
                    androidChannel.EnableLights(false);
                    // Sets whether notification posted to this channel should vibrate.
                    androidChannel.EnableVibration(false);
                    androidChannel.SetVibrationPattern(new long[] { 0 });
                    // Sets the notification light color for notifications posted to this channel
                    androidChannel.LightColor = 0x38FF1234;
                    // Sets whether notifications posted to this channel appear on the lockscreen or not
                    androidChannel.LockscreenVisibility = NotificationVisibility.Private;

                    getManager().CreateNotificationChannel(androidChannel);
                }

            }

            private NotificationManager getManager()
            {
                if (mManager == null)
                {
                    mManager = (NotificationManager)context.GetSystemService(NotificationService);
                }
                return mManager;
            }

            public Notification.Builder getAndroidChannelNotification(string title, string body, PendingIntent pendingIntent)
            {
                if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.O)
                {
                    return new Notification.Builder(context, channelId)
                            .SetContentTitle(title)
                            .SetContentText(body)
                            .SetContentIntent(pendingIntent)
                            .SetSmallIcon(Android.Graphics.Drawables.Icon.CreateWithBitmap( ((Android.Graphics.Drawables.BitmapDrawable)context.PackageManager.GetApplicationIcon(context.PackageManager.GetApplicationInfo(context.PackageName,0))).Bitmap))//android.R.drawable.stat_notify_more
                            //.SetWhen(System.DateTime.Now.Ticks)
                            .SetOngoing(true)
                            .SetChannelId(channelId)
                            .SetAutoCancel(true);

                }
                else
                {
                    return new Notification.Builder(context, channelId);
                }

            }
        }


        #region GPS定位

        LocationManager locationManager;
        /// <summary>
        /// 初始化定位服务
        /// </summary>  
        void initLocation()
        {
            //GPS初始化
            locationManager = GetSystemService(LocationService).JavaCast<LocationManager>();
            // 判断GPS是否正常启动  
            if (!locationManager.IsProviderEnabled(LocationManager.GpsProvider))
            {
                if (Language.CurrentLanguage == "Chinese")
                {
                    Toast.MakeText(this, "请打开GPS...", ToastLength.Long).Show();
                }
                else
                {
                    Toast.MakeText(this, "Please open GPS...", ToastLength.Long).Show();
                }
            }
            else
            {
                locationManager.RequestLocationUpdates(LocationManager.GpsProvider, 60 * 1000, 1000, new locationChange { });
            }
        }

        class locationChange : Java.Lang.Object, Android.Locations.ILocationListener
        {
            public void OnLocationChanged(Location location)
            {
                Shared.Application.LocationAction?.Invoke(location.Longitude, location.Latitude);
            }

            public void OnProviderDisabled(string provider)
            {
            }

            public void OnProviderEnabled(string provider)
            {
            }

            public void OnStatusChanged(string provider, [GeneratedEnum] Availability status, Bundle extras)
            {
            }
        }

        public void OnLocationChanged(Location location)
        {
        }

        public void OnProviderDisabled(string provider)
        {

        }

        public void OnProviderEnabled(string provider)
        {

        }

        public void OnStatusChanged(string provider, [GeneratedEnum] Availability status, Bundle extras)
        {

        }
        #endregion

        public override StartCommandResult OnStartCommand(Intent intent, [GeneratedEnum] StartCommandFlags flags, int startId)
        {
            return StartCommandResult.Sticky;
        }
    }
}