using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Xamarin.Forms;
using InABox.Core;
using InABox.Configuration;
using InABox.Clients;
using InABox.Mobile;
using Comal.Classes;
using XF.Material.Forms.UI.Dialogs;
using comal.timesheets.CustomControls;
using comal.timesheets.StoreRequis;
using PRSSecurity = InABox.Core.Security;
using Plugin.LocalNotification;
using comal.timesheets.Tasks;
using System.IO;
using static comal.timesheets.CustomControls.JobShell;
using static Android.Graphics.Paint;
using static InABox.Mobile.LocationServices;

namespace comal.timesheets
{
    public delegate void MainPageNotificationsChanged();
    public delegate void RefreshScreen();
    public static class MainPageUtils
    {
        public static event MainPageNotificationsChanged OnMainPageNotificationsChanged;
        public static event RefreshScreen OnRefreshScreen;

        public static Assignment CurrentAssignment = null;
        public static JobShell Job = new JobShell();
        public static int NumberOfNotifications = 0;
        public static string matchedDeviceName = "";
        public static string deviceName = "";
        public static bool bRecentlyUpdatedTiles = false;
        public static TimeSheet _timesheet = null;
        public static Employee _employee = null;
        public static CoreTable _jobs = null;
        public static bool firstLoad = true;
        public static bool recentlyAskedToUpdate = true;
        public static int updateCounter;

        public static void Init()
        {
            InitEvents();
            InitData();
            InitTimers();
        }
        private static void InitEvents()
        {
            App.GPS.OnLocationFound += LocationFound;
            App.GPS.OnLocationError += LocationError;
            App.Bluetooth.OnScanFinished += ScanFinished;
            App.Data.DataChanged += (s, t, e) => { OnRefreshScreen?.Invoke(); };
            App.Data.DataRefreshed += () => { OnRefreshScreen?.Invoke(); };
        }

        private static void InitData()
        {
            GlobalVariables.EmpID = GlobalVariables.GetEmployeeID();
            GlobalVariables.EmpName = GlobalVariables.GetEmployeeName();

            App.Data.Employee.ID = GlobalVariables.EmpID;
            App.Data.Employee.Name = GlobalVariables.EmpName;

            _timesheet = App.Data.TimeSheets?.Rows.FirstOrDefault()?.ToObject<TimeSheet>();
            _employee = App.Data.Employee;
            _jobs = App.Data.Jobs;

            deviceName = MobileUtils.GetDeviceID();

            firstLoad = false;
        }

        private static void InitTimers()
        {
            Timer t = new Timer(RecentlyAskedToUpdateTimer, null, 600000, 600000); //user is reminded to update when opening screen after timer of 10 minutes
            updateCounter = 1; //user is forced to update after 3rd reminder

            Timer t1 = new Timer(RecentlyUpdatedTilesTimer, null, 30000, 30000);
            //bluetooth data is allowed to upload once every minute, notifications refreshing is piggybacked to this too
        }

        private static void RecentlyAskedToUpdateTimer(object o)
        {
            recentlyAskedToUpdate = false;
        }

        private static void RecentlyUpdatedTilesTimer(object o)
        {
            bRecentlyUpdatedTiles = false;
            App.Data.Refresh(true);
            SearchForNewNotifications();
        }

        public static Assignment CheckCurrentAssignment()
        {
            Thread.Sleep(5000);
            StartAssignmentTimer();

            CoreTable table = new Client<Assignment>().Query(
                     new Filter<Assignment>(x => x.EmployeeLink.ID).IsEqualTo(GlobalVariables.EmpID)
                     .And(x => x.Date).IsEqualTo(DateTime.Today.Date)
                     .And(x => x.Actual.Finish).IsEqualTo(null),
                     null,
                     new SortOrder<Assignment>(x => x.Actual.Start, SortDirection.Ascending));
            if (!table.Rows.Any())
            {
                Job.OnJobIDChanged += OnJobIDChanged;
                return null;
            }
            else
                return table.Rows.LastOrDefault().ToObject<Assignment>();

        }

        private static void StartAssignmentTimer()
        {
            Timer t = new Timer(AssignmentTimerCallback, null, 300000, 300000);
        }

        private static void AssignmentTimerCallback(object state)
        {
            if (CurrentAssignment != null)
                SaveCurrentAssignment("PRS Mobile main screen - Saving assignment on 5 minute timer");
        }

        public static void SaveCurrentAssignment(string auditnote, bool complete = false)
        {
            if (!complete)
                CurrentAssignment.Booked.Finish = RoundToNearestInterval(DateTime.Now, new TimeSpan(0, 5, 0)).TimeOfDay;
            else
                CurrentAssignment.Actual.Finish = RoundToNearestInterval(DateTime.Now, new TimeSpan(0, 5, 0)).TimeOfDay;

            new Client<Assignment>().Save(CurrentAssignment, auditnote);
        }

        static DateTime RoundToNearestInterval(DateTime dt, TimeSpan d)
        {
            int f = 0;
            double m = (double)(dt.Ticks % d.Ticks) / d.Ticks;
            if (m >= 0.5)
                f = 1;
            return new DateTime(((dt.Ticks / d.Ticks) + f) * d.Ticks);
        }

        public static void UseCurrentAssignment(Assignment assgn)
        {
            CurrentAssignment = assgn;
            SaveCurrentAssignment("PRS Mobile main screen - saving assignment on re-login to App");
            if (CurrentAssignment.JobLink.ID != Guid.Empty)
            {
                Job.ID = CurrentAssignment.JobLink.ID;
                var job = new Client<Job>().Query(new Filter<Job>(x => x.ID).IsEqualTo(Job.ID)).Rows.FirstOrDefault().ToObject<Job>();
                Job.JobNumber = job.JobNumber;
                Job.Name = job.Name;
                Job.OnJobIDChanged += OnJobIDChanged;
            }
        }

        public static void OnJobIDChanged(Guid jobid)
        {
            if (CurrentAssignment == null)
                CreateNewAssignment(jobid);

            else
            {
                SaveCurrentAssignment("PRS Mobile main screen - saving assignment on job change", true);
                CreateNewAssignment(jobid);
            }
        }

        private static void CreateNewAssignment(Guid jobid)
        {
            CurrentAssignment = new Assignment { Date = DateTime.Now.Date };
            CurrentAssignment.EmployeeLink.ID = GlobalVariables.EmpID;
            CurrentAssignment.JobLink.ID = jobid;
            CurrentAssignment.Actual.Start = RoundToNearestInterval(DateTime.Now, new TimeSpan(0, 5, 0)).TimeOfDay;
            CurrentAssignment.Booked.Start = CurrentAssignment.Actual.Start;
            CurrentAssignment.Booked.Finish = RoundToNearestInterval(DateTime.Now, new TimeSpan(0, 5, 0)).TimeOfDay.Add(new TimeSpan(0, 5, 0));
            var job = new Client<Job>().Query(new Filter<Job>(x => x.ID).IsEqualTo(jobid)).Rows.FirstOrDefault().ToObject<Job>();
            CurrentAssignment.Title = "Clocking on to job " + job.Name + " (" + job.JobNumber + ") on PRS Mobile";
            new Client<Assignment>().Save(CurrentAssignment, "Changed job on mobile - creating new assignment");
        }

        #region Notifications

        public static Page DetermineCorrectPage(Plugin.LocalNotification.EventArgs.NotificationActionEventArgs e)
        {
            string data = e.Request.ReturningData;
            int index = data.IndexOf("$");
            Guid ID = Guid.Parse(data.Remove(index));
            string type = data.Substring(index + 1);
            if (type == "Comal.Classes.Kanban")
                return new AddEditTask(ID);
            else if (type == "Comal.Classes.Delivery")
                return new DeliveryDetails(ID);
            else
                return null;
        }

        public static async void SearchForNewNotifications()
        {
            //notifications poll reliably in the background for Anroid, unreliable for iOS due to difficulty with cross-platform plugins for notifications
            try
            {
                await Task.Run(() =>
                {
                    if (ClientFactory.UserGuid != Guid.Empty)
                    {
                        CoreTable table = new Client<Notification>().Query
                        (new Filter<Notification>(x => x.Employee.UserLink.ID).IsEqualTo(ClientFactory.UserGuid).And(X => X.Closed).IsEqualTo(DateTime.MinValue),
                            new Columns<Notification>(
                                   x => x.ID, //0
                                   x => x.Sender.Name, //1   
                                   x => x.Title, //2
                                   x => x.Created, //3
                                   x => x.Description, //4
                                   x => x.EntityType, //5
                                   x => x.EntityID //6
                                   )
                        );
                        if (NumberOfNotifications == table.Rows.Count()) //no new notifications or none present at all
                            return;
                        else //new notifications or previous notifications have now been dismissed
                        {
                            NumberOfNotifications = table.Rows.Count();
                            OnMainPageNotificationsChanged?.Invoke();
                            CheckNotificationsPushed(table);
                        }
                    }
                });
            }
            catch { }
        }

        private static void CheckNotificationsPushed(CoreTable table)
        {
            try
            {
                if (!Application.Current.Properties.ContainsKey("LastPushedNotifications"))
                {
                    Application.Current.Properties.Add("LastPushedNotifications", DateTime.Now);
                }
                DateTime lastPushed = DateTime.Parse(Application.Current.Properties["LastPushedNotifications"].ToString());
                List<NotificationShell> toNotify = new List<NotificationShell>();
                foreach (CoreRow row in table.Rows)
                {
                    List<object> list = row.Values;
                    DateTime created = DateTime.Parse(list[3].ToString());
                    if (created > new DateTime(2022, 8, 22)) // prevent spam from buildup of old notifications before this is released
                    {
                        if (created > lastPushed)
                        {
                            if (list[1] == null) list[1] = "";
                            if (list[2] == null) list[2] = "";
                            if (list[3] == null) list[3] = DateTime.MinValue;
                            if (list[4] == null) list[4] = "";
                            if (list[5] == null) list[5] = "";
                            if (list[6] == null) list[6] = Guid.Empty;

                            NotificationShell shell = new NotificationShell
                            {
                                ID = Guid.Parse(list[0].ToString()),
                                Sender = list[1].ToString(),
                                Title = list[2].ToString(),
                                Created = DateTime.Parse(list[3].ToString()),
                                EntityType = list[5].ToString(),
                                EntityID = Guid.Parse(list[6].ToString())
                            };
                            toNotify.Add(shell); //add notification to be pushed
                        }
                    }
                }
                if (toNotify.Count > 0)
                    PushNotificationsAsync(toNotify);
            }
            catch { }
        }

        private static async Task PushNotificationsAsync(List<NotificationShell> shells)
        {
            try
            {
                int count = 1;

                foreach (NotificationShell shell in shells)
                {
                    var notification = new NotificationRequest
                    {
                        BadgeNumber = 1,
                        Description = shell.Title,
                        Title = "New PRS Notification: ",
                        ReturningData = shell.EntityID.ToString() + "$" + shell.EntityType,
                        NotificationId = count,
                    };
                    count++;
                    NotificationImage img = new NotificationImage();
                    img.ResourceName = "icon16.png";
                    notification.Image = img;

                    await LocalNotificationCenter.Current.Show(notification);
                }
                Application.Current.Properties["LastPushedNotifications"] = DateTime.Now;
            }
            catch { }
        }

        #endregion

        private static void LocationFound(LocationServices sender)
        {
            //if (bSharedDevice)
            //    return;
            if (App.Bluetooth.RecentlyScanned)
                UploadTiles();

            try
            {
                TimeSheet timesheet = App.Data.TimeSheets?.Rows.FirstOrDefault()?.ToObject<TimeSheet>();
                if (timesheet != null)
                {
                    if (timesheet.StartLocation.Latitude.Equals(0.0F) && timesheet.StartLocation.Longitude.Equals(0.0F))
                    {
                        timesheet.StartLocation.Latitude = sender.Latitude;
                        timesheet.StartLocation.Longitude = sender.Longitude;
                        timesheet.StartLocation.Timestamp = sender.TimeStamp;
                        timesheet.Address = sender.Address;
                        new Client<TimeSheet>().Save(timesheet, "Updating Timesheet with GPS Coordinates", (o, e) => { });
                    }
                }

                if (!string.IsNullOrWhiteSpace(matchedDeviceName))
                {
                    InABox.Core.Location curlocation = new InABox.Core.Location() { Latitude = App.GPS.Latitude, Longitude = App.GPS.Longitude };
                    curlocation.Timestamp = DateTime.Now;

                    GPSTrackerLocation gpsTrackerLocation = new GPSTrackerLocation();
                    gpsTrackerLocation.DeviceID = matchedDeviceName;
                    gpsTrackerLocation.Location.Timestamp = curlocation.Timestamp;
                    gpsTrackerLocation.Location = curlocation;

                    new Client<GPSTrackerLocation>().Save(gpsTrackerLocation, "Updated company device location from Timebench");
                }

                OnRefreshScreen?.Invoke();
            }
            catch { }

        }

        private static async void UploadTiles()
        {
            try
            {
                if (App.GPS.Latitude.Equals(0.0F) && App.GPS.Longitude.Equals(0.0F))
                    return;
                if (App.Bluetooth.DetectedBlueToothMACAddresses.Count == 0)
                    return;
                if (bRecentlyUpdatedTiles)
                    return;
                bRecentlyUpdatedTiles = true;
                await Task.Run(() =>
                {
                    InABox.Core.Location curlocation = new InABox.Core.Location() { Latitude = App.GPS.Latitude, Longitude = App.GPS.Longitude };
                    curlocation.Timestamp = DateTime.Now;
                    List<GPSTrackerLocation> trackersToUpdate = new List<GPSTrackerLocation>();

                    foreach (String id in App.Bluetooth.DetectedBlueToothMACAddresses)
                    {
                        GPSTracker tracker = GlobalVariables.GPSTrackerCache.Find(x => x.DeviceID.Equals(id));
                        bool stale = tracker.Location.Timestamp < DateTime.Now.Subtract(new TimeSpan(0, 5, 0));
                        bool moved = tracker.Location.DistanceTo(curlocation, UnitOfLength.Kilometers) > 0.1;
                        if (stale || moved)
                        {
                            GlobalVariables.GPSTrackerCache.Remove(tracker);
                            tracker.Location = curlocation;
                            GlobalVariables.GPSTrackerCache.Add(tracker);
                            //cache is updated

                            GPSTrackerLocation gpsTrackerLocation = new GPSTrackerLocation();
                            gpsTrackerLocation.DeviceID = tracker.DeviceID;
                            gpsTrackerLocation.Location.Timestamp = tracker.Location.Timestamp;
                            gpsTrackerLocation.Location = curlocation;
                            trackersToUpdate.Add(gpsTrackerLocation);
                        }
                    }
                    if (trackersToUpdate.Any())
                    {
                        if (ClientFactory.UserGuid != Guid.Empty)
                            new Client<GPSTrackerLocation>().Save(trackersToUpdate, "Updating Bluetooth Device Locations");
                    }
                    App.Bluetooth.DetectedBlueToothMACAddresses.Clear();
                }
                );
            }
            catch (Exception e)
            {

            }


            //if ((master != null) && (master.Location.Timestamp < DateTime.Now.Subtract(new TimeSpan(0, 15, 0))))
            //{
            //    GPSTrackerLocation device = new GPSTrackerLocation();
            //    device.DeviceID = MobileUtils.GetDeviceID();
            //    device.Location.Latitude = App.GPS.Latitude;
            //    device.Location.Longitude = App.GPS.Longitude;
            //    device.Location.Timestamp = DateTime.Now;
            //    locations.Add(device);
            //    //device.BatteryLevel = ((double)CrossBattery.Current.RemainingChargePercent);
            //    //new Client<GPSTrackerLocation>().Save(device, "Updating Device Location"); //, SaveTrackerCallback);
            //}

            #region OLD
            //for (int i = 0; i < App.Bluetooth.Devices.Length; i++)
            //{
            //    String id = App.Bluetooth.Devices[i];
            //    int level = App.Bluetooth.BatteryLevels[i];
            //    var btmaster = trackers.FirstOrDefault(x => x.DeviceID.Equals(id));

            //    if ((btmaster != null) && (!locations.Any(x => x.DeviceID.Equals(btmaster.DeviceID))))
            //    {
            //        bool stale = btmaster.Location.Timestamp < DateTime.Now.Subtract(new TimeSpan(0, 15, 0));
            //        bool moved = btmaster.Location.DistanceTo(curlocation, UnitOfLength.Kilometers) > 0.1;
            //        if (stale || moved)
            //        {
            //            GPSTrackerLocation location = new GPSTrackerLocation();
            //            location.DeviceID = id;
            //            location.Location.Latitude = App.GPS.Latitude;
            //            location.Location.Longitude = App.GPS.Longitude;
            //            location.Location.Timestamp = DateTime.Now;
            //            location.BatteryLevel = level;
            //            locations.Add(location);
            //        }
            //    }
            //    //new Client<GPSTrackerLocation>().Save(location, "Found Kontakt Device"); //, SaveTrackerCallback);
            //}

            //if (locations.Any())
            //    new Client<GPSTrackerLocation>().Save(locations, "Updating Bluetooth Device Locations", (o, e) => { });
            #endregion

        }

        private static void LocationError(LocationServices sebder, Exception error)
        {

        }

        private static void ScanFinished(Bluetooth sender)
        {
            try
            {
                OnRefreshScreen?.Invoke();

                if (App.GPS.RecentlyLocated)
                    UploadTiles();
            }
            catch { }
        }
    }
}