using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Windows.Controls;
using ActiproSoftware.Windows.Controls.Shell;
using JD.Asset.Types.Map;
using Orbit.Module.View;
using Plume.Core.Logging;
using Plume.WPF.Commands;
using Plume.WPF.Mvvm;

namespace Orbit.Module.ViewModel
{
    public class FolderExplorerViewModel : BindableBase, IPhotoshopContext
    {
        private int _selectedIndexTopFolders;

        public ILogger Logger { get; }
        public ObservableCollection<DirectoryInfo> TopFolders { get; set; } = new ObservableCollection<DirectoryInfo>();
        public ICollection<ShellObjectViewModel> SelectedItems { get; } = new List<ShellObjectViewModel>();

        public int SelectedIndexTopFolders
        {
            get => _selectedIndexTopFolders;
            set => SetProperty(ref _selectedIndexTopFolders, value);
        }

        public Map SelectedMap { get; set; }

        public IEnumerable<string> SelectedFiles
        {
            get { return SelectedItems.Select(x => x.FileSystemPath); }
        }

        public DelegateCommand ShowImageViewer { get; }

        public FolderExplorerViewModel(ILogger logger)
        {
            Logger = logger ?? throw new ArgumentNullException(nameof(logger));
            ShowImageViewer = new DelegateCommand(OnShowImageViewer);
        }

        public void OnSelectionChanged(SelectionChangedEventArgs selectionChangedEventArgs)
        {
            foreach (ShellObjectViewModel removedItem in selectionChangedEventArgs.RemovedItems)
                SelectedItems.Remove(removedItem);
            foreach (ShellObjectViewModel addedItem in selectionChangedEventArgs.AddedItems)
                SelectedItems.Add(addedItem);
        }

        public void OnSelectedMapChanged(Map map)
        {
            SelectedMap = map;
            
            TopFolders.Clear();

            if (SelectedMap != null)
            {
                TopFolders.Add(new DirectoryInfo(SelectedMap.MenuArtFolder));
                TopFolders.Add(new DirectoryInfo(SelectedMap.BackgroundFolder));
            }

            int currentSelected = _selectedIndexTopFolders;
            SelectedIndexTopFolders = currentSelected == -1 ? 0 : currentSelected;
        }

        public void Refresh()
        {
            OnPropertyChanged(nameof(SelectedIndexTopFolders));
        }

        private void OnShowImageViewer()
        {
            if (!SelectedFiles.Any()) return;

            var imageViewer = new ImageViewer
            {
                Owner = System.Windows.Application.Current.MainWindow
            };
            imageViewer.Show();
            var imageViewerVm = new ImageViewerViewModel();
            imageViewer.DataContext = imageViewerVm;
            var _ = imageViewerVm.Initialize(SelectedFiles.Last());
        }
    }
}