using FileManager_UWP.Model;
using FileManager_UWP.Service;
using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.Storage;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Input;

namespace FileManager_UWP.ViewModel {
    public class FileListViewModel : ViewModelBase {

        /// <summary>
        /// 当前路径
        /// </summary>
        private string _path = "C:\\";
        public string Path {
            get => _path;
            set => Set(nameof(Path), ref _path, value);
        }

        /// <summary>
        /// 文件和文件夹列表
        /// </summary>
        private IEnumerable<DisplayFileFolderItem> _displayFileFolderItems;
        public IEnumerable<DisplayFileFolderItem> DisplayFileFolderItems {
            get => _displayFileFolderItems;
            set => Set(nameof(DisplayFileFolderItems), ref _displayFileFolderItems, value);
        }

        private string _debugText;
        public string DebugText {
            get => _debugText;
            set => Set(nameof(DebugText), ref _debugText, value);
        }

        /// <summary>
        /// 刷新命令
        /// </summary>
        private RelayCommand _refreshCommand;
        public RelayCommand RefreshCommand =>
            _refreshCommand ?? (_refreshCommand = new RelayCommand(async () => {
                var fileService = new FileService();
                var fileList = await fileService.GetDisplayFileFolderList(Path);
                DisplayFileFolderItems = fileList;
            }));

        private object _listSelectedItem;
        public object ListSelectedItem {
            get => _listSelectedItem;
            set
            {
                Set(nameof(ListSelectedItem), ref _listSelectedItem, value);
            }
        }

        private List<object> _listSelectedItems;
        public List<object> ListSelectedItems {
            get => _listSelectedItems;
            set {
                Debug.WriteLine("Select " + ((DisplayFileFolderItem)ListSelectedItems[0]).Name);
                Set(nameof(ListSelectedItems), ref _listSelectedItems, value);
            }
        }

        public void HandleDoubleTapped(object sender, DoubleTappedRoutedEventArgs e) {
            DisplayFileFolderItem i = ListSelectedItem as DisplayFileFolderItem;
            Debug.WriteLine("Double tapped");
            if (i != null && i.IsFolder) {
                Debug.WriteLine("double tapped: " + i.Name);
                Path = i.Path;
                RefreshCommand.Execute(null);
            }
        }

    
        public void ListViewBase_OnItemClick(object sender, ItemClickEventArgs e) {
            DisplayFileFolderItem i = e.ClickedItem as DisplayFileFolderItem;
            Debug.WriteLine("Clicked");
            if (i != null && i.IsFolder) {
                Debug.WriteLine("Clicked: " + i.Name);
                Path = i.Path;
                RefreshCommand.Execute(null);
            }
        }
    }
}