using System.Collections.ObjectModel;
using System.ComponentModel;
using ModpackUpdater.Apps.Manager.Api.Model;
using PropertyChanged;

namespace ModpackUpdater.Apps.Manager.Ui.Models.MainWindow;

public class MainWindowViewModel : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler? PropertyChanged;

    private ObservableCollection<MainWindowTreeNode>? currentTreeNodes;
    private ObservableCollection<MainWindowGridRow>? currentGridRows;
    private MainWindowTreeNode? selectedTreeNode;
    private IWorkspace? currentWorkspace;

    public bool IsUpdate => selectedTreeNode is ActionSetTreeNode node && node.Infos is UpdateInfo;

    public MainWindowGridRow? SelectedGridRow { get; set; }

    [AlsoNotifyFor(nameof(CurrentTreeNodes))]
    public IWorkspace? CurrentWorkspace
    {
        get => currentWorkspace;
        set
        {
            currentTreeNodes = null;
            currentWorkspace = value;
        }
    }

    public ObservableCollection<MainWindowTreeNode>? CurrentTreeNodes
    {
        get
        {
            if (currentTreeNodes == null && currentWorkspace?.InstallInfos != null && currentWorkspace?.UpdateInfos != null)
                currentTreeNodes =
                [
                    new ActionSetTreeNode(currentWorkspace.InstallInfos),
                    new SimpleMainWindowTreeNode("Updates")
                    {
                        Image = AppGlobals.Symbols.GetImageSource(AppSymbols.update_done),
                        Nodes = [.. currentWorkspace.UpdateInfos.Updates.Select(n => new ActionSetTreeNode(n))],
                    },
                ];
            return currentTreeNodes;
        }
    }

    [AlsoNotifyFor(nameof(CurrentGridRows))]
    public MainWindowTreeNode? SelectedTreeNode
    {
        get => selectedTreeNode;
        set
        {
            currentGridRows = null;
            selectedTreeNode = value;
        }
    }

    public ObservableCollection<MainWindowGridRow>? CurrentGridRows
    {
        get
        {
            if (currentGridRows == null && CurrentWorkspace?.InstallInfos != null && selectedTreeNode is ActionSetTreeNode node)
                currentGridRows = [.. node.Infos.Actions.Select(n => new MainWindowGridRow(n, CurrentWorkspace.InstallInfos))];
            return currentGridRows;
        }
    }
}