using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using System.Web;
using Avalonia.Controls;
using Avalonia.Media.Imaging;
using Avalonia.Platform.Storage;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using GazpromApp.Enums;
using GazpromApp.Messages;
using GazpromApp.Models;
using Image = GazpromApp.Models.Image;

namespace GazpromApp.ViewModels;

public partial class EditEquipmentDialogViewModel : ViewModelBase
{
    [ObservableProperty] 
    [NotifyCanExecuteChangedFor(nameof(CompleteEditCommand))]
    private string? _name;
    
    [ObservableProperty]
    [NotifyCanExecuteChangedFor(nameof(CompleteEditCommand))]
    private string? _description;
    
    [ObservableProperty]
    private bool _isNameEditing;
    
    [ObservableProperty]
    private bool _isDescriptionEditing;
    
    public ObservableCollection<ImageViewModel> Images { get; set; }
    
    public ObservableCollection<InspectionViewModel> Inspections { get; set; }
    
    [RelayCommand]
    private void EditName()
    {
        IsNameEditing = !IsNameEditing;
        IsDescriptionEditing = false;
    }
    
    [RelayCommand]
    private void EditDescription()
    {
        IsDescriptionEditing = !IsDescriptionEditing;
        IsNameEditing = false;
    }
    
    [RelayCommand]
    private async Task AddImage(Window w)
    {
        var files = await w.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
        {
            AllowMultiple = true,
            Title = "Выберите одну или несколько картинок",
            FileTypeFilter = [FilePickerFileTypes.ImageAll]
        });
        foreach (var file in files)
        {
            try
            {
                Images.Add(new ImageViewModel(new Image()) { FileName = new Bitmap(HttpUtility.UrlDecode(file.Path.AbsolutePath) ) });
            }
            catch (ArgumentException)
            {
                var error = new Error
                {
                    Title = "Ошибка обработки картинки",
                    Message = $"Картинка не была добавлена: \"{HttpUtility.UrlDecode(file.Name)}\"",
                    Severity = ErrorSeverity.Error
                };
                _ = await WeakReferenceMessenger.Default.Send(new ErrorMessage(new ErrorViewModel(error)));
            }
        }
        
        IsImagesEmpty = Images.Count == 0;
    }
    
    [RelayCommand]
    private static async Task ViewImage(ImageViewModel image) => _ = await WeakReferenceMessenger.Default.Send(new ViewImageMessage(image));
    
    [RelayCommand]
    private void DeleteImage(ImageViewModel image)
    {
        Images.Remove(image);
        IsImagesEmpty = Images.Count == 0;
    }

    [RelayCommand]
    private void AddInspection()
    {
        Inspections.Add(new InspectionViewModel { Name = "Название инспекции", InspectionDate = DateTimeOffset.Now, PeriodValue = 1, PeriodType = PeriodType.Day });
    }

    [RelayCommand]
    private void EditInspection(InspectionViewModel inspection)
    {
        foreach (var item in Inspections)
            if (item != inspection)
                item.IsEditing = false;
        inspection.IsEditing = !inspection.IsEditing;
    }

    [RelayCommand]
    private void DeleteInspection(InspectionViewModel inspection)
    {
        Inspections.Remove(inspection);
    }

    public ObservableCollection<PropertyViewModel> Properties { get; set; }

    [RelayCommand]
    private void AddPropertySimple() => Properties.Add(new PropertyViewModel());
    
    [RelayCommand]
    private static void AddProperty(PropertyViewModel property) => property.Properties.Add(new PropertyViewModel(property));

    [RelayCommand]
    private static void EditProperty(PropertyViewModel property) => property.IsEditing = !property.IsEditing;

    [RelayCommand]
    private void DeleteProperty(PropertyViewModel property)
    {
        if (property.Parent is null)
            Properties.Remove(property);
        else
            property.Parent?.Properties.Remove(property);
    }
    
    private bool CanCompleteEdit() => !string.IsNullOrWhiteSpace(Name);

    [RelayCommand(CanExecute = nameof(CanCompleteEdit))]
    private void CompleteEdit()
    {
        IsClosed = true;
        var equipment = new Equipment
        {
            Name = Name,
            Description = Description,
            Images = Images.Select(e => e.GetImage()).ToList(),
            Inspections = Inspections.Select(e => e.GetInspection()).ToList(),
            Properties = Properties.Select(e => e.GetProperty()).ToList()
        };
        WeakReferenceMessenger.Default.Send(new EditEquipmentDone(new EquipmentViewModel(equipment)));
    }

    [RelayCommand]
    private void CancelEdit(Window w)
    {
        IsClosed = true;
        WeakReferenceMessenger.Default.Send(new EditEquipmentDone(_equipment));
    }
    
    // Visual and other properties
    
    [ObservableProperty]
    private bool _isImagesEmpty;

    [ObservableProperty]
    private bool _isClosed;
    
    private readonly EquipmentViewModel _equipment;

    // ReSharper disable once MemberCanBeMadeStatic.Global
    public PeriodType[] AllPeriods => Enum.GetValues<PeriodType>()
        .Where(p => p != PeriodType.Unknown)
        .ToArray();
    
    public EditEquipmentDialogViewModel()
    {
        Name = "Testing";
        Description = "Testing";
        Images = [];
        Inspections = [];
        Properties = [];
        
        IsImagesEmpty = true;
        
        _equipment = new EquipmentViewModel();
    }

    public EditEquipmentDialogViewModel(EquipmentViewModel equipment)
    {
        Name = equipment.Name;
        Description = equipment.Description;
        Images = equipment.Images;
        Inspections = new ObservableCollection<InspectionViewModel>(equipment.Inspections.Select(e => e));
        Properties = new ObservableCollection<PropertyViewModel>(equipment.Properties.Select(e => e));
        
        IsImagesEmpty = Images.Count == 0;
        
        _equipment = equipment;
    }
}