using ComPDFKitViewer.PdfViewer;
using Microsoft.Win32;
using PDF_Master.CustomControl;
using PDF_Master.Helper;
using PDF_Master.Properties;
using PDF_Master.ViewModels.HomePanel.RecentFiles;
using PDFSettings;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Navigation;
using winform = System.Windows.Forms;

namespace PDF_Master.Views.HomePanel.RecentFiles
{
    public partial class RecentFilesContent : UserControl
    {
        private RecentFilesContentViewModel ViewModel => DataContext as RecentFilesContentViewModel;
        public RecentFilesContent()
        {
            InitializeComponent();
        }

        #region 初始化
        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            InitVariables();
            InitEvents();
        }

        private void InitVariables()
        {
            if (RecentFilesList.SelectedItems != null)
                RecentFilesList.SelectedItems.Clear();

            if (GridRecentFilesList.SelectedItems != null)
                GridRecentFilesList.SelectedItems.Clear();
        }
        private void InitEvents()
        {
            ViewModel.RecentFilesSelectionHandler -= ViewModel_RecentFilesSelection;
            ViewModel.RecentFilesSelectionHandler += ViewModel_RecentFilesSelection;
        }
        #endregion

        #region UI操作
        private void ViewModel_RecentFilesSelection(object sender, bool e)
        {
            //if (e)
            //{
            //    RecentFilesList.SelectedItems.Clear();
            //    if (GridRecentFilesList.SelectedItems.Count > 0)
            //    {
            //        for (int i = 0; i < GridRecentFilesList.SelectedItems.Count; i++)
            //        {
            //            RecentFilesList.SelectedItems.Add(GridRecentFilesList.SelectedItems[i]);
            //        }

            //    }
            //}
            //else
            //{
            //    GridRecentFilesList.SelectedItems.Clear();
            //    if (RecentFilesList.SelectedItems.Count > 0)
            //    {
            //        for (int i = 0; i < RecentFilesList.SelectedItems.Count; i++)
            //        {
            //            GridRecentFilesList.SelectedItems.Add(RecentFilesList.SelectedItems[i]);
            //        }

            //    }
            //}
        }

        private void ContextMenu_Opened(object sender, RoutedEventArgs e)
        {
            try
            {
                ListView listView;
                if (BtnListMode.IsChecked == true)
                    listView = RecentFilesList;
                else
                    listView = GridRecentFilesList;

                var contexMenu = sender as ContextMenu;
                if (contexMenu != null)
                {
                    foreach (var item in contexMenu.Items)
                    {
                        var menuitem = item as MenuItem;
                        menuitem.Visibility = Visibility.Visible;
                    }
                }
                //临时绑定文案
                (contexMenu.Items[0] as MenuItem).Header = ViewModel.T_MenuShow;
                (contexMenu.Items[1] as MenuItem).Header = ViewModel.T_MenuOpenFile;
                (contexMenu.Items[2] as MenuItem).Header = ViewModel.T_MenuRemove;

                if (listView.SelectedItems.Count >= 2)
                {
                    foreach (var item in contexMenu.Items)
                    {
                        var menuitem = item as MenuItem;
                        if (menuitem.Name == "FilePathMenuItem")
                            menuitem.Visibility = Visibility.Collapsed;

                        if(menuitem.Name == "MenuOpenFile")
                        {
                            menuitem.Visibility = Visibility.Visible;
                        }
                    }
                }
                else
                {
                    foreach (var item in contexMenu.Items)
                    {
                        var menuitem = item as MenuItem;
                        if (menuitem.Name == "MenuOpenFile")
                        {
                            menuitem.Visibility = Visibility.Collapsed;
                        }
                    }
                }

     
            }
            catch { }
        }

        /// <summary>
        /// 禁用触发鼠标右键，列表项被选中
        /// </summary>
        private void ListViewItem_PreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
            Trace.WriteLine("Preview MouseRightButtonDown");
            e.Handled = true;
        }

        #endregion


        #region Events


        /// <summary>
        /// 右键菜单：删除文件记录
        /// </summary>
        private void DeleteMenuItem_Click(object sender, RoutedEventArgs e)
        {
            ListView listView;
            if (BtnListMode.IsChecked == true)
                listView = RecentFilesList;
            else
                listView = GridRecentFilesList;


            if (listView.SelectedItems == null || listView.SelectedItems.Count == 0)
            {
                var item = (sender as MenuItem).DataContext as OpenFileInfo;
                if (item != null)
                {
                    ViewModel?.RemoveFileItemCommand.Execute(item);
                }
            }
            else
            {
                ViewModel?.RemoveFilesFromContainerCommand.Execute(listView.SelectedItems);
            }

        }

        /// <summary>
        /// 右键菜单：打开文件路径
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FilePathMenuItem_Click(object sender, RoutedEventArgs e)
        {
            if ((sender as MenuItem) != null)
            {
                var menuItem = sender as MenuItem;
                var file = menuItem.DataContext as OpenFileInfo;
                ViewModel?.ExplorerFileCommand.Execute(file);
            }
        }

        /// <summary>
        /// 双击打开最近列表
        /// </summary>
        private void RecentFilesList_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            var item = sender as ListViewItem;
            if (item != null && (item.DataContext as OpenFileInfo) != null)
            {
                var fileInfo = item.DataContext as OpenFileInfo;
                if(fileInfo != null)
                {
                    ViewModel?.OpenRecentFilesCommand.Execute(fileInfo);
                }
            }

        }

        /// <summary>
        /// 文件列表项：打开文件
        /// </summary>
        private void DocItemListViewControl_OpenFileItemHandler(object sender, RoutedEventArgs e)
        {
            var item = (sender as MenuItem).DataContext as OpenFileInfo;
            if (item != null)
            {
                ViewModel?.OpenRecentFilesCommand.Execute(item);
            }
        }

        /// <summary>
        ///  文件列表项：删除文件记录
        /// </summary>
        private void DocItemListViewControl_DeleteItemHandler(object sender, RoutedEventArgs e)
        {
            var item = (sender as MenuItem).DataContext as OpenFileInfo;
            if (item != null)
            {
                ViewModel?.RemoveFileItemCommand.Execute(item);
            }
        }

        #endregion

        private void UserControl_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Escape)
            {
                //Windows:最近文件列表补充点击空白处取消选中；移除Esc取消选中逻辑
                //点击ESC取消选中
                //if (GridRecentFilesList.Visibility == Visibility.Visible)
                //{
                //    GridRecentFilesList.SelectedIndex = -1;
                //}
                //else
                //{
                //    RecentFilesList.SelectedIndex = -1;
                //}
            }
        }

        private void MenuOpenFile_Click(object sender, RoutedEventArgs e)
        {
            ListView listView;
            if (BtnListMode.IsChecked == true)
                listView = RecentFilesList;
            else
                listView = GridRecentFilesList;

            if (listView.SelectedItems.Count >=2)
            {
                List<string> files = new List<string>();
                foreach (OpenFileInfo item in listView.SelectedItems)
                {
                    var fileInfo = item;
                    if (!File.Exists(fileInfo.FilePath))
                    {
                        SettingHelper.RemoveRecentOpenFile(fileInfo.FilePath);
                    }
                    else
                    {
                        files.Add(fileInfo.FilePath);
                    }
                }
                ViewModel?.LoadPdfViewer(files.ToArray());
            }
        }

        private void UserControl_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
        {
            //已经加载后，切换页签时，确认是否要刷新数据源
            if(IsLoaded&&(bool)e.NewValue)
            {
                ViewModel.UpdateItemSoucre();
            }
        }
    }
}