using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Imaging;
using Comal.Classes;
using ExCSS;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Wpf;
using InABox.WPF;
using Syncfusion.UI.Xaml.Diagram;
using Syncfusion.UI.Xaml.Maps;
using GeoFence = Comal.Classes.GeoFence;
using Point = System.Windows.Point;

namespace PRSDesktop;

public abstract class AbstractMapMarker
{
    public string Label { get; set; } = "";
    public string Longitude { get; set; }
    public string Latitude { get; set; }
}

public class SiteMapMarker : AbstractMapMarker
{

}

public class AssetMapMarker : AbstractMapMarker { }



public class GeoFenceImageConverter : AbstractConverter<GPSLocationType, BitmapImage?>
{

    private Dictionary<GPSLocationType, BitmapImage?> _images = new()
    {
        { GPSLocationType.Office, PRSDesktop.Resources.mapmarker.AsBitmapImage() },
        { GPSLocationType.Supplier, PRSDesktop.Resources.supplier.AsBitmapImage() },
        { GPSLocationType.Employee, PRSDesktop.Resources.employee.AsBitmapImage() },
        { GPSLocationType.Job, PRSDesktop.Resources.project.AsBitmapImage() },
    };

    public override BitmapImage? Convert(GPSLocationType value)
    {
        if (_images.TryGetValue(value, out var image))
            return image;
        return null;
    }
}

public class LiveMapsPanelViewModel : DependencyObject, INotifyPropertyChanged
{
    private EquipmentGroup[]? _equipmentGroups;
    private Equipment[]? _equipment;
    private EquipmentGroup? _selectedEquipmentGroup;
    private System.Tuple<GPSLocationType?, string> _selectedSiteType;
    private GeoFence? _selectedSite;
    private string? _equipmentSearch;
    private DateTime _date = DateTime.Today;
    private Equipment? _selectedEquipment;
    private ObservableCollection<Point>? _waypoints;
    private Point _center;
    private double _radius;
    private GeoFence[]? _sites;
    private ObservableCollection<MapElement> _elements;
    private ObservableCollection<AbstractMapMarker>? _markers;
    
    #region Equipment
    
    public EquipmentGroup[]? EquipmentGroups
    {
        get => _equipmentGroups;
        set => SetField(ref _equipmentGroups, value);
    }
    
    public EquipmentGroup? SelectedEquipmentGroup
    {
        get => _selectedEquipmentGroup;
        set
        {
            if (value == _selectedEquipmentGroup)
                return;
            SetField(ref _selectedEquipmentGroup, value);
            SelectedEquipment = null;
            SaveSettings();
            OnPropertyChanged(nameof(VisibleEquipment));
            ReloadLocations();
        }
    }

    public Equipment[]? Equipment
    {
        get => _equipment;
        set => SetField(ref _equipment, value);
    }
    
    public string? EquipmentSearch
    {
        get => _equipmentSearch;
        set
        {
            SetField(ref _equipmentSearch, value);
            OnPropertyChanged(nameof(VisibleEquipment));
        }
    }
    
    public Equipment[]? VisibleEquipment => Equipment?.Where(x =>
        (
            (Equals(SelectedEquipmentGroup?.ID,CoreUtils.FullGuid)
            || Equals(x.GroupLink.ID,SelectedEquipmentGroup?.ID)
        ) && (
            string.IsNullOrEmpty(EquipmentSearch) 
            || x.Code.Contains(EquipmentSearch,StringComparison.CurrentCultureIgnoreCase)
            || x.Description.Contains(EquipmentSearch,StringComparison.CurrentCultureIgnoreCase)
        )
    )).ToArray();
    
    public Equipment? SelectedEquipment
    {
        get => _selectedEquipment;
        set
        {
            SetField(ref _selectedEquipment, value);
            if (value != null)
            {
                SelectedSite = null;
                ReloadLocations();
            }
        }
    }

    #endregion
    
    #region Sites
    
    public System.Tuple<GPSLocationType?, string>[] SiteTypes =>
    [
        new System.Tuple<GPSLocationType?, string>(null, "All Sites"),
        new System.Tuple<GPSLocationType?, string>(GPSLocationType.Office, "Office Location"),
        new System.Tuple<GPSLocationType?, string>(GPSLocationType.Job, "Job Sites"),
        new System.Tuple<GPSLocationType?, string>(GPSLocationType.Supplier, "Suppliers")
    ];
    
    public System.Tuple<GPSLocationType?, string> SelectedSiteType
    {
        get => _selectedSiteType;
        set
        {
            SetField(ref _selectedSiteType, value);
            SaveSettings();
            OnPropertyChanged(nameof(VisibleSites));
            SelectedSite = null;
        }
    }
    
    public GeoFence[]? Sites
    {
        get => _sites;
        set
        {
            _sitesMap.Clear();
            if (value is not null)
            {
                foreach (var site in value ?? [])
                    _sitesMap[site] = Serialization.Deserialize<GeoFenceDefinition>(site.Geofence) ?? new GeoFenceDefinition();
            }
            SetField(ref _sites, value);
        }
    }

    public GeoFence[]? VisibleSites => Sites?
        .Where(x => (_selectedSiteType?.Item1 == null) || Equals(x.Type, _selectedSiteType?.Item1))
        .ToArray();

    
    private Dictionary<GeoFence,GeoFenceDefinition> _sitesMap = new();

    public GeoFence? SelectedSite
    {
        get => _selectedSite;
        set
        {
            SetField(ref _selectedSite, value);

            if (value != null)
            {
                SelectedEquipment = null;
                CenterMap(value, null);
            }
        }
    }
    
    #endregion
    
    public DateTime Date
    {
        get => _date;
        set
        {
            SetField(ref _date, value);
            ReloadLocations();
        }
    }
    
    private void CenterMap(GeoFence? site, IEnumerable<Point>? points)
    {
        var nwLon = double.MaxValue;
        var nwLat = double.MinValue;
        var seLon = double.MinValue;
        var seLat = double.MaxValue;

        
        var allpoints = new List<Point>();
        
        if (points != null)
            allpoints.AddRange(points);
        
        if (site != null)
        {
            foreach (var fence in _sitesMap.Where(x=>x.Key == site))
                allpoints.AddRange(fence.Value.Coordinates.Select(x => new Point(x.Latitude, x.Longitude)));
        }
        
        foreach (var point in allpoints)
        {
            var lat = point.X;
            var lon = point.Y;
            if (lat != 0.0F && lon != 0.00)
            {
                nwLat = lat > nwLat ? lat : nwLat;
                seLat = lat < seLat ? lat : seLat;
                nwLon = lon < nwLon ? lon : nwLon;
                seLon = lon > seLon ? lon : seLon;
            }
        }
        
        var cLat = (nwLat + seLat) / 2.0F;
        var cLon = (nwLon + seLon) / 2.0F;
        //Center = new Point(-33.0 + new Random(DateTime.Now.Millisecond).NextDouble(), 115.0 + new Random(DateTime.Now.Millisecond).NextDouble());
        Center = new Point(cLat, cLon);
        var c = new Location { Latitude = cLat, Longitude = cLon };
        var nw = new Location { Latitude = nwLat, Longitude = nwLon };
        Radius = Math.Max(0.25, c.DistanceTo(nw, UnitOfLength.Kilometers) / 2.0F);
        
    }

    private void ReloadLocations()
    {
        var trackerids = VisibleEquipment?.Select(x => x.TrackerLink.ID).ToArray() ?? [];
        var selected = SelectedEquipment?.TrackerLink.ID ?? CoreUtils.FullGuid;
        
        Client.Query(
            new Filter<GPSTrackerLocation>(x=>x.Tracker.ID).InList(trackerids)
                .And(x => x.Location.Timestamp).IsGreaterThanOrEqualTo(Date.Date)
                .And(x => x.Location.Timestamp).IsLessThan(Date.Date.AddDays(1)),
            Columns.None<GPSTrackerLocation>()
                .Add(x=>x.Tracker.ID)
                .Add(x=>x.Location.Latitude)
                .Add(x=>x.Location.Longitude)
                .Add(x=>x.Location.Address)
                .Add(x=>x.Location.Timestamp),
            new SortOrder<GPSTrackerLocation>(x=>x.Location.Timestamp,SortDirection.Ascending),
            (data, _) =>
            {
                Dispatcher.BeginInvoke(() =>
                {
                    GPSTrackerLocation[] pings = [];
                    if (data is null)
                    {
                        EquipmentColorConverter.Pings = pings;
                        Waypoints = null;
                        Markers = null;
                    }
                    else
                    {
                        List<AbstractMapMarker> markers = new();
                        
                        pings = data.ToArray<GPSTrackerLocation>();
                        EquipmentColorConverter.Pings = pings;

                        var otherassets = pings
                            .Where(x=>x.Tracker.ID != selected)
                            .GroupBy(x => x.Tracker.ID)
                            .Where(x=>x.Any())
                            .Select(x=>x.Last() 
                        );

                        var assetmarkers = new List<AssetMapMarker>();

                        foreach (var asset in otherassets)
                        {
                            var eq = _equipment?.FirstOrDefault(e=>e.TrackerLink.ID == asset.Tracker.ID);
                            if (eq != null)
                            {
                                var marker = new AssetMapMarker()
                                {
                                    Latitude = $"{asset.Location.Latitude}",
                                    Longitude = $"{asset.Location.Longitude}",
                                    Label = $"{eq.Code}\n{eq.Description}\nLast seen: {asset.Location.Timestamp}"
                                };
                                markers.Add(marker);
                            }
                        }
                        
                        var waypoints = pings
                            .Where(x => x.Tracker.ID == selected)
                            .ToArray();
                        
                        Waypoints = new ObservableCollection<Point>(waypoints.Select(x => new Point(x.Location.Latitude, x.Location.Longitude)));
                        
                        var sites = new Dictionary<GeoFence, SiteMapMarker>();
                        GeoFence? curFence = null;
                        
                        foreach (var waypoint in waypoints)
                        {
                            var time = $"{waypoint.Location.Timestamp:h:mm tt}";
                            var geopoint = new GeoPoint(waypoint.Location.Latitude, waypoint.Location.Longitude);
                            bool bFound = false;
                            
                            foreach (var geofence in _sitesMap)
                            {
                                
                                if (geofence.Value.Contains(geopoint))
                                {
                                    if (!sites.ContainsKey(geofence.Key))
                                        sites[geofence.Key] = new SiteMapMarker()
                                        {
                                            Latitude = $"{geopoint.Latitude}",
                                            Longitude = $"{geopoint.Longitude}"
                                        };
                                    
                                    var timelist = sites[geofence.Key].Label.Split('\n').Where(x=>!string.IsNullOrWhiteSpace(x)).ToList();
                                    
                                    var first = timelist.FirstOrDefault() ?? "";
                                    if (!string.Equals(first,geofence.Key.Name))
                                        timelist.Insert(0,geofence.Key.Name);
                                    
                                    if ((geofence.Key == curFence) && timelist.Any())
                                    {
                                            var lasttime = timelist.Last().Split(" - ").ToList();
                                            timelist.Remove(timelist.Last());
                                            timelist.Add($"{lasttime.First()} - {time}");
                                    }
                                    else
                                        timelist.Add($"{time} - {time}");
                        
                                    sites[geofence.Key].Label = string.Join("\n", timelist);
                                    curFence = geofence.Key;
                                    bFound = true;
                                    break;
                                }
                            }
                            if (!bFound)
                                curFence = null;
                        }
                        markers.AddRange(sites.Values);

                        Markers = new ObservableCollection<AbstractMapMarker>(markers);
                    }
                    OnPropertyChanged(nameof(VisibleEquipment));
                    RecalculateLayers();
                    CenterMap(_sites?.FirstOrDefault(x=>x.Type == GPSLocationType.Office), pings.Select(x=>new Point(x.Location.Latitude, x.Location.Longitude)));
                });
            }
        );
    }


    public ObservableCollection<MapElement> Elements
    {
        get => _elements;
        set => SetField(ref _elements, value);
    }

    private void RecalculateLayers()
    {
        var elements = new ObservableCollection<MapElement>();
        if (_sites?.Any() == true)
        {
            foreach (var geofence in _sites)
            {
                var definition = Serialization.Deserialize<GeoFenceDefinition>(geofence.Geofence) ?? new GeoFenceDefinition();
                var polygon = new MapPolygon()
                {

                    Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.LightSalmon)
                        { Opacity = 0.5 },
                    Stroke = System.Windows.Media.Brushes.Firebrick,
                    StrokeThickness = 0.75,
                    Points = new ObservableCollection<Point>(
                        definition.Coordinates.Select(x => new Point(x.Latitude, x.Longitude))),
                };
                elements.Add(polygon);

            }
        }
        
        if (_waypoints?.Any( ) == true)
        {
            var line = new MapPolyline()
            {
                Points = new ObservableCollection<Point>(new ObservableCollection<Point>(_waypoints)),
                Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Navy) { Opacity = 0.5 },
                Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Navy) { Opacity = 0.5 },
                StrokeThickness = 4
            };
            elements.Add(line);

            if (_waypoints.Count > 1)
            {
                var start = new MapCircle()
                {
                    Center = _waypoints.First(),
                    Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.LightGreen) { Opacity = 0.9 },
                    Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Black),
                    StrokeThickness = 0.5,
                    Radius = 10
                };
                elements.Add(start);
            }

            var end = new MapCircle()
            {
                Center = _waypoints.Last(),
                Fill = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Red) { Opacity = 0.9 },
                Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Black),
                StrokeThickness = 0.5,
                Radius = 10
            };
            elements.Add(end);
        }

        Elements = elements;
    }
    
    public ICommand RefreshCommand { get; set; }
    
    public ObservableCollection<AbstractMapMarker>? Markers
    {
        get => _markers;
        set => SetField(ref _markers, value);
    }

    public ObservableCollection<Point>? Waypoints
    {
        get => _waypoints;
        set => SetField(ref _waypoints, value);
    }

    public Point Center
    {
        get => _center;
        set => SetField(ref _center, value);
    }

    public double Radius
    {
        get => _radius;
        set => SetField(ref _radius, value);
    }

    public LiveMapsSettings Settings { get; private set; }

    public LiveMapsPanelViewModel()
    {
        Settings = new UserConfiguration<LiveMapsSettings>().Load();
    }

    public void SaveSettings()
    {
        if (bRefreshing)
            return;
        Settings.GeofenceType = _selectedSiteType.Item1;
        Settings.GroupID = _selectedEquipmentGroup?.ID ?? Guid.Empty;
        new UserConfiguration<LiveMapsSettings>().Save(Settings);
    }
        
    private bool bRefreshing = false;
    
    public void Refresh()
    {
        
        MultiQuery query = new MultiQuery();

        query.Add(new Filter<GeoFence>().All());
        
        query.Add(new Filter<EquipmentGroup>().All(),
            Columns.None<EquipmentGroup>()
                .Add(x => x.ID)
                .Add(x => x.Description)
                .Add(x=>x.Thumbnail.ID)
        );
            
        query.Add(
            new Filter<Document>(x=>x.ID).InQuery(new Filter<EquipmentGroup>().All(),x=>x.Thumbnail.ID));

        query.Add(
            new Filter<Equipment>(x => x.TrackerLink.ID).IsNotEqualTo(Guid.Empty),
            Columns.None<Equipment>()
                .Add(x => x.ID)
                .Add(x => x.Code)
                .Add(x => x.Description)
                .Add(x=>x.GroupLink.ID)
                .Add(x=>x.GroupLink.Thumbnail.ID)
                .Add(x=>x.TrackerLink.ID)
                .Add(x=>x.TrackerLink.Location.Timestamp)
                .Add(x=>x.TrackerLink.Location.Address)
                .Add(x=>x.TrackerLink.DeviceID)
                .Add(x=>x.TrackerLink.BatteryLevel)
        );
        query.Query( _ =>
        {
            Dispatcher.BeginInvoke(() =>
            {
                bRefreshing = true;
                foreach (var row in query.Get<Document>().Rows)
                {
                    var img = ImageUtils.LoadImage(row.Get<Document, byte[]>(x => x.Data));
                    EquipmentThumbnailConverter.Cache[row.Get<Document, Guid>(x => x.ID)] = img;
                }
                // EquipmentThumbnailConverter.Cache = query.Get<Document>()
                //     .ToDictionary<Document, Guid, BitmapImage?>(x => x.ID,
                //         x => ImageUtils.LoadImage(x.Data));
                Sites = query.Get<GeoFence>().ToArray<GeoFence>();
                SelectedSiteType = SiteTypes.FirstOrDefault(x => x.Item1 == Settings.GeofenceType) ?? SiteTypes.First();
                SelectedSite = null;
                
                var groups = query.Get<EquipmentGroup>().ToList<EquipmentGroup>();
                groups.Insert(0,new EquipmentGroup() { ID = CoreUtils.FullGuid, Description="(All Groups)"});
                EquipmentGroups = groups.ToArray();
                SelectedEquipmentGroup = EquipmentGroups?.FirstOrDefault(x=>x.ID == Settings.GroupID);
                
                Equipment = query.Get<Equipment>().ToArray<Equipment>();
                SelectedEquipment = null;
                
                bRefreshing = false;
                ReloadLocations();
            });
        });
    }
        
    public event PropertyChangedEventHandler? PropertyChanged;

    protected virtual void OnPropertyChanged([CallerMemberName] string? propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    protected bool SetField<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
    {
        if (EqualityComparer<T>.Default.Equals(field, value)) return false;
        field = value;
        OnPropertyChanged(propertyName);
        return true;
    }
}