using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using Microsoft.CodeAnalysis.VisualBasic.Syntax;
using org.omg.PortableInterceptor;
using PRSDesktop.Forms;
using PRSDesktop.WidgetGroups;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using InABox.Configuration;
using Client = InABox.Clients.Client;
using System.Windows;
using InABox.Wpf;

namespace PRSDesktop.Dashboards;

public class EquipmentSchedulesDashboardProperties : IUserConfigurationSettings, IDashboardProperties
{
    public bool OnlyShowSchedules { get; set; } = true;

    public DynamicGridSelectedFilterSettings Filters { get; set; } = new();
}

public class ScheduleViewModel : INotifyPropertyChanged
{
    private Guid employeeID;
    private string? employeeName;
    private string? employeeMobile;
    private string? employeeEmail;
    private BitmapImage? employeeImage;

    public bool HasEmployee => EmployeeID != Guid.Empty;

    public Guid ID { get; set; }

    public string Title { get; set; }

    public DateTime DueDate { get; set; }

    public BitmapImage? EmployeeImage
    {
        get => employeeImage;
        set
        {
            employeeImage = value;
            NotifyPropertyChanged();
        }
    }

    public Guid EmployeeID
    {
        get => employeeID;
        set
        {
            employeeID = value;
            NotifyPropertyChanged(nameof(HasEmployee));
        }
    }

    public string? EmployeeName
    {
        get => employeeName;
        set
        {
            employeeName = value;
            NotifyPropertyChanged();
        }
    }

    public string? EmployeeMobile
    {
        get => employeeMobile;
        set
        {
            employeeMobile = value;
            NotifyPropertyChanged();
            NotifyPropertyChanged(nameof(EmployeeContact));
        }
    }

    public string? EmployeeEmail
    {
        get => employeeEmail;
        set
        {
            employeeEmail = value;
            NotifyPropertyChanged();
            NotifyPropertyChanged(nameof(EmployeeContact));
        }
    }

    public string? EmployeeContact
    {
        get
        {
            var str = "";
            if (EmployeeEmail is not null) str = EmployeeEmail;
            if(EmployeeMobile is not null)
            {
                if (string.IsNullOrWhiteSpace(str))
                {
                    str = EmployeeMobile;
                }
                else
                {
                    str += $", {EmployeeMobile}";
                }
            }

            return string.IsNullOrWhiteSpace(str) ? null : str;
        }
    }

    public event PropertyChangedEventHandler? PropertyChanged;

    private void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class EquipmentScheduleViewModel
{
    public bool HasLocation { get; set; }

    public Guid ID { get; set; }

    public string Code { get; set; }

    public string Description { get; set; }

    public List<ScheduleViewModel> Schedules { get; set; }
}

[ValueConversion(typeof(DateTime), typeof(SolidColorBrush))]
class ScheduleBackgroundConverter : IValueConverter
{
    public Color GetColor(DateTime date)
    {
        var diff = date - DateTime.Today;
        if (diff < TimeSpan.Zero)
            return Colors.Salmon;
        else if (diff.TotalDays <= 7)
            return Colors.Orange;
        else if (diff.Days <= 30)
            return Colors.LightYellow;
        else
            return Colors.LightGreen;
    }

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var date = (DateTime)value;
        var color = GetColor(date);
        return new SolidColorBrush(color);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

/// <summary>
/// Interaction logic for EquipmentSchedulesDashboard.xaml
/// </summary>
public partial class EquipmentSchedulesDashboard : UserControl, IDashboardWidget<EquipmentDashboardGroup, EquipmentSchedulesDashboardProperties>, IHeaderDashboard, IBasePanel
{
    public EquipmentSchedulesDashboardProperties Properties { get; set; } = null!;

    public DashboardHeader Header { get; set; } = new();

    public event LoadSettings<EquipmentSchedulesDashboardProperties>? LoadSettings;
    public event SaveSettings<EquipmentSchedulesDashboardProperties>? SaveSettings;
    public event DataModelUpdateEvent? OnUpdateDataModel;

    private Dictionary<Guid, Equipment> Equipment = new();

    private Dictionary<Guid, BitmapImage?> EmployeeImages = new();

    private Dictionary<Guid, Employee> Employees = new();

    private List<EquipmentScheduleViewModel> Models = new();

    public EquipmentSchedulesDashboard()
    {
        InitializeComponent();
    }

    public void Setup()
    {
        LoadEmployeeImages();

        SetupHeader();
    }

    #region IBasePanel

    public string SectionName => "EquipmentSchedules";
    
    public DataModel DataModel(Selection selection)
    {
        return new AutoDataModel<Equipment>(new Filter<Equipment>().All());
    }
    
    public bool IsReady { get; set; }
    
    public void CreateToolbarButtons(IPanelHost host)
    {
    }

    public Dictionary<string, object[]> Selected()
    {
        return new();
    }

    public void Heartbeat(TimeSpan time)
    {
        
    }

    #endregion

    #region Header

    private CheckBox ShowSchedulesBox = null!;
    private FilterButton<Equipment> FilterBtn = null!;

    public void SetupHeader()
    {
        ShowSchedulesBox = new CheckBox
        {
            Content = "Only show schedules?",
            IsChecked = Properties.OnlyShowSchedules,
            VerticalAlignment = VerticalAlignment.Center
        };
        ShowSchedulesBox.Checked += ShowSchedulesBox_Checked;
        ShowSchedulesBox.Unchecked += ShowSchedulesBox_Checked;

        FilterBtn = new FilterButton<Equipment>(
            new GlobalConfiguration<CoreFilterDefinitions>(nameof(EquipmentSchedulesDashboard)),
            new UserConfiguration<CoreFilterDefinitions>(nameof(EquipmentSchedulesDashboard)))
        {
            Width = 25,
            Height = 25,
            Padding = new()
        };
        FilterBtn.BuiltInFilters.Add(new("Exclude Disposed", () => new Filter<Equipment>(x => x.Disposed).IsEqualTo(null)));
        FilterBtn.SetSettings(Properties.Filters, false);
        FilterBtn.OnFiltersSelected += FilterBtn_OnFiltersSelected;
        FilterBtn.OnFilterRefresh += FilterBtn_OnFilterRefresh;

        Header.BeginUpdate()
            .Clear()
            .Add(ShowSchedulesBox)
            .AddRight(FilterBtn)
            .EndUpdate();
    }

    private void ShowSchedulesBox_Checked(object sender, RoutedEventArgs e)
    {
        Properties.OnlyShowSchedules = ShowSchedulesBox.IsChecked == true;
        Refresh();
    }

    private void FilterBtn_OnFilterRefresh()
    {
        Refresh();
    }

    private void FilterBtn_OnFiltersSelected(DynamicGridSelectedFilterSettings filters)
    {
        Properties.Filters = filters;
    }

    #endregion

    private void LoadEmployeeImages()
    {
        Task.Run(() =>
        {
            var employees = new Client<Employee>()
                .Query(
                    LookupFactory.DefineFilter<Employee>(),
                    Columns.None<Employee>().Add(
                        x => x.ID,
                        x => x.Thumbnail.ID,
                        x => x.Name,
                        x => x.Mobile,
                        x => x.Email))
                .ToObjects<Employee>().ToList();
            var documents = new Client<Document>()
                .Query(
                    new Filter<Document>(x => x.ID).InList(employees.Select(x => x.Thumbnail.ID).ToArray()),
                    Columns.None<Document>().Add(x => x.ID).Add(x => x.Data))
                .ToDictionary<Document, Guid, byte[]>(x => x.ID, x => x.Data);
            return new { Employees = employees, Documents = documents };
        }).ContinueWith((task) =>
        {
            EmployeeImages = task.Result.Employees.ToDictionary(
                x => x.ID,
                x =>
                {
                    var document = task.Result.Documents.GetValueOrDefault(x.Thumbnail.ID);
                    if (document is null)
                        return null;

                    return ImageUtils.BitmapImageFromBytes(document);
                });
            Employees = task.Result.Employees.ToDictionary(x => x.ID, x => x);
            lock (Models)
            {
                var anonymous = PRSDesktop.Resources.anonymous.AsBitmapImage();
                foreach (var model in Models)
                {
                    foreach (var schedule in model.Schedules)
                    {
                        var employee = Employees?.GetValueOrDefault(schedule.EmployeeID);
                        schedule.EmployeeImage = EmployeeImages?.GetValueOrDefault(schedule.EmployeeID) ?? anonymous;
                        schedule.EmployeeMobile = employee?.Mobile;
                        schedule.EmployeeName = employee?.Name;
                        schedule.EmployeeEmail = employee?.Email;
                    }
                }
            }
        }, TaskScheduler.FromCurrentSynchronizationContext());
    }

    public void Refresh()
    {
        var eqFilter = FilterBtn.GetFilter();

        var results = Client.QueryMultiple(
            new KeyedQueryDef<Equipment>(
                eqFilter,
                Columns.None<Equipment>().Add(x => x.ID)
                    .Add(x => x.Code)
                    .Add(x => x.Description)
                    .Add(x => x.TrackerLink.ID)
                    .Add(x => x.TrackerLink.Location.Latitude)
                    .Add(x => x.TrackerLink.Location.Longitude)
                    .Add(x => x.TrackerLink.Location.Timestamp)),
            new KeyedQueryDef<Schedule>(
                new Filter<Schedule>(x => x.DocumentClass).IsEqualTo(typeof(Equipment).EntityName())
                    .And(x => x.IncludeInAggregate).IsEqualTo(true),
                Columns.None<Schedule>().Add(x => x.ID)
                    .Add(x => x.Title)
                    .Add(x => x.DueDate)
                    .Add(x => x.DocumentID)
                    .Add(x => x.EmployeeLink.ID)));

        var equipmentItems = results.Get<Equipment>().Rows.Select(x => x.ToObject<Equipment>());
        Equipment = equipmentItems.ToDictionary(x => x.ID, x => x);
        var schedules = results.Get<Schedule>().Rows
            .Select(x => x.ToObject<Schedule>())
            .GroupBy(x => x.DocumentID)
            .ToDictionary(x => x.Key, x => x.OrderBy(x => x.DueDate).ToList());

        var anonymous = PRSDesktop.Resources.anonymous.AsBitmapImage();

        lock (Models)
        {
            Models = new List<EquipmentScheduleViewModel>();
            foreach (var equipmentItem in equipmentItems)
            {
                var equipmentSchedules = schedules.GetValueOrDefault(equipmentItem.ID);
                if(equipmentSchedules is null && Properties.OnlyShowSchedules)
                {
                    continue;
                }

                var model = new EquipmentScheduleViewModel
                {
                    Code = equipmentItem.Code,
                    Description = equipmentItem.Description,
                    ID = equipmentItem.ID,
                    HasLocation = equipmentItem.TrackerLink.ID != Guid.Empty
                };

                model.Schedules = (equipmentSchedules ?? Enumerable.Empty<Schedule>())
                    .Select(x =>
                    {
                        var employee = Employees.GetValueOrDefault(x.EmployeeLink.ID);
                        return new ScheduleViewModel
                        {
                            Title = x.Title,
                            DueDate = x.DueDate,
                            ID = x.ID,
                            EmployeeImage = EmployeeImages.GetValueOrDefault(x.EmployeeLink.ID) ?? anonymous,
                            EmployeeID = x.EmployeeLink.ID,
                            EmployeeEmail = employee?.Email,
                            EmployeeMobile = employee?.Mobile,
                            EmployeeName = employee?.Name
                        };
                    })
                    .ToList() ?? [];

                Models.Add(model);
            }
        }
        EquipmentList.ItemsSource = Models;
    }

    public void Shutdown(CancelEventArgs? cancel)
    {
    }

    private void Border_ContextMenuOpening(object sender, ContextMenuEventArgs e)
    {
        if (sender is not FrameworkElement element || element.Tag is not Guid equipmentID) return;

        var menu = new ContextMenu();
        menu.AddItem("View Equipment", null, equipmentID, ViewEquipment_Click);
        menu.AddItem("Add Schedule", null, equipmentID, CreateSchedule_Click);
        menu.IsOpen = true;

        e.Handled = true;
    }

    private void CreateSchedule_Click(Guid equipmentID)
    {
        var schedule = new Schedule();
        schedule.DocumentClass = typeof(Equipment).EntityName();
        schedule.DocumentID = equipmentID;

        if (DynamicGridUtils.EditEntity(schedule))
        {
            Refresh();
        }
    }

    private void Grid_ContextMenuOpening(object sender, ContextMenuEventArgs e)
    {
        if (sender is not FrameworkElement element || element.Tag is not Guid equipmentID) return;

        var menu = new ContextMenu();
        menu.AddItem("Add Schedule", null, equipmentID, CreateSchedule_Click);
        menu.IsOpen = true;

        e.Handled = true;
    }

    private void Schedule_ContextMenuOpening(object sender, ContextMenuEventArgs e)
    {
        if (sender is not FrameworkElement element || element.Tag is not Guid scheduleID) return;

        var menu = new ContextMenu();
        menu.AddItem("View Schedule", null, scheduleID, ViewSchedule_Click);
        menu.IsOpen = true;

        e.Handled = true;
    }

    private void Employee_ContextMenuOpening(object sender, ContextMenuEventArgs e)
    {
        if (sender is not FrameworkElement element || element.Tag is not Guid employeeID) return;

        if (employeeID == Guid.Empty) return;

        var menu = new ContextMenu();
        menu.AddItem("View Employee", null, employeeID, ViewEmployee_Click);
        menu.IsOpen = true;

        e.Handled = true;
    }

    private void ViewEquipment_Click(Guid equipmentID)
    {
        if (DynamicGridUtils.EditEntity<Equipment>(equipmentID))
        {
            Refresh();
        }
    }

    private void ViewSchedule_Click(Guid scheduleID)
    {
        if (DynamicGridUtils.EditEntity<Schedule>(scheduleID))
        {
            Refresh();
        }
    }

    private void ViewEmployee_Click(Guid employeeID)
    {
        if (DynamicGridUtils.EditEntity<Employee>(employeeID))
        {
            Refresh();
        }
    }

    private void EquipmentLocation_Click(object sender, System.Windows.RoutedEventArgs e)
    {
        var equipmentID = (Guid)(sender as Button)!.Tag;

        if (!Equipment.TryGetValue(equipmentID, out var equipment))
            return;

        var form = new MapForm(
            equipment.TrackerLink.Location.Latitude,
            equipment.TrackerLink.Location.Longitude,
            equipment.TrackerLink.Location.Timestamp);
        form.ShowDialog();
    }
}

public class EquipmentSchedulesDashboardElement : 
    DashboardElement<EquipmentSchedulesDashboard, EquipmentDashboardGroup, EquipmentSchedulesDashboardProperties> { }