using System.Collections.ObjectModel;
using System.Windows;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Messaging;
using Livia.Models.Data;
using Livia.Utility;
using Livia.Views.Utility;

namespace Livia.ViewModels;

public class SelectSeriesWindowViewModel : ObservableObject, IRecipient<LogoutMessage>
{
    public event EventHandler? OnRequestClose;
    public bool Loaded { get => _loaded; set => SetProperty(ref _loaded, value); }
    public ObservableCollection<SeriesGroupExpanderViewModel> SeriesGroups { get; } = [];

    private bool _loaded;
    private readonly IServerHandler _serverHandler;
    private readonly IWarningSystem _warningSystem;
    private readonly string _key;

    public SelectSeriesWindowViewModel(string key, IServerHandler serverHandler, IWarningSystem warningSystem)
    {
        _serverHandler = serverHandler;
        _warningSystem = warningSystem;
        _key = key;
        WeakReferenceMessenger.Default.RegisterAll(this);
        Task.Run(LoadSeriesList);
    }

    private async Task LoadSeriesList()
    {
        List<SeriesGroup> result = await _serverHandler.GetSeriesGroupList(_key).ConfigureAwait(false);
        List<SeriesGroupExpanderViewModel> viewModels = result.Select(seriesGroup => new SeriesGroupExpanderViewModel(seriesGroup)).ToList();

        Application.Current.Dispatcher.Invoke(() =>
        {
            foreach (SeriesGroupExpanderViewModel viewModel in viewModels)
            {
                SeriesGroups.Add(viewModel);
            }
        });
        Loaded = true;
    }

    public async Task SelectSeries()
    {
        List<string> selectedSeries = (from seriesGroupExpanderViewModel in SeriesGroups
                                       from seriesCollectionItem in seriesGroupExpanderViewModel.SeriesCollection.Items
                                       where seriesCollectionItem.IsChecked 
                                       select seriesCollectionItem.SeriesData.Uid).ToList();
        (bool success, string messageIndex) = await _serverHandler.SelectSeries(_key, selectedSeries).ConfigureAwait(false);
        _warningSystem.ShowDialog(success ? WarningWindowKind.Info : WarningWindowKind.Warning, false, messageIndex);
    }

    public void Receive(LogoutMessage message)
    {
        OnRequestClose?.Invoke(this, EventArgs.Empty);
    }
}