using System.ComponentModel;
using System.Collections.ObjectModel;
using System.Runtime.CompilerServices;
using EmbyToolbox.Models;

namespace EmbyToolbox.ViewModels;

public sealed class AddFilesOptionsViewModel : INotifyPropertyChanged
{
    private readonly Action<AddFilesOptions> _onAdd;
    private readonly Action _onCancel;

    private bool _removeForeignAudioAndSubtitles;
    private ConversionProfilePresetRow? _selectedProfile;

    public AddFilesOptionsViewModel(
        IReadOnlyList<ConversionProfilePresetRow> profiles,
        string selectedProfileName,
        Action<AddFilesOptions> onAdd,
        Action onCancel)
    {
        _onAdd = onAdd;
        _onCancel = onCancel;
        Profiles = new ObservableCollection<ConversionProfilePresetRow>(profiles);
        _selectedProfile = Profiles.FirstOrDefault(p => p.Profile.Equals(selectedProfileName, StringComparison.OrdinalIgnoreCase))
            ?? Profiles.FirstOrDefault(p => p.Profile.Equals("Emby", StringComparison.OrdinalIgnoreCase))
            ?? Profiles.FirstOrDefault();
        AddCommand = new RelayCommand(ExecuteAdd);
        CancelCommand = new RelayCommand(() => _onCancel());
    }

    /// <summary>Взаимоисключающие опции: два свойства, чтобы не использовать TwoWay на одно поле с конвертером (переполнение стека в WPF).</summary>
    public bool OptionKeepAllTracks
    {
        get => !_removeForeignAudioAndSubtitles;
        set
        {
            if (!value)
            {
                return;
            }

            if (!_removeForeignAudioAndSubtitles)
            {
                return;
            }

            _removeForeignAudioAndSubtitles = false;
            OnPropertyChanged();
            OnPropertyChanged(nameof(OptionRemoveForeignTracks));
        }
    }

    public bool OptionRemoveForeignTracks
    {
        get => _removeForeignAudioAndSubtitles;
        set
        {
            if (!value)
            {
                return;
            }

            if (_removeForeignAudioAndSubtitles)
            {
                return;
            }

            _removeForeignAudioAndSubtitles = true;
            OnPropertyChanged();
            OnPropertyChanged(nameof(OptionKeepAllTracks));
        }
    }

    public ObservableCollection<ConversionProfilePresetRow> Profiles { get; }

    public ConversionProfilePresetRow? SelectedProfile
    {
        get => _selectedProfile;
        set
        {
            if (ReferenceEquals(_selectedProfile, value))
            {
                return;
            }

            _selectedProfile = value;
            OnPropertyChanged();
        }
    }

    public RelayCommand AddCommand { get; }
    public RelayCommand CancelCommand { get; }

    private void ExecuteAdd()
    {
        _onAdd(
            new AddFilesOptions
            {
                Profile = string.IsNullOrWhiteSpace(_selectedProfile?.Profile) ? "Emby" : _selectedProfile.Profile,
                RemoveForeignAudioAndSubtitles = _removeForeignAudioAndSubtitles
            });
    }

    public event PropertyChangedEventHandler? PropertyChanged;

    private void OnPropertyChanged([CallerMemberName] string? name = null) =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
}