using ImTools;
using PDF_Master.CustomControl;
using PDF_Master.Helper;
using PDF_Master.Model.Dialog.ToolsDialogs;
using PDF_Master.ViewModels.Dialog.ToolsDialogs;
using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace PDF_Master.Views.Dialog.ToolsDialogs
{
    /// <summary>
    /// MergeDialog.xaml 的交互逻辑
    /// </summary>
    public partial class MergeDialog : UserControl
    {
        /// <summary>
        /// 当前显示了线段的Item
        /// </summary>
        private ListViewItem listViewItem = null;
        private bool IsFile = false;
        public MergeDialog()
        {
            InitializeComponent();
        }

        private void Delete_Click(object sender, RoutedEventArgs e)
        {
            (DataContext as MergeDialogViewModel).DeleteItem((sender as Button).DataContext as MergeObject);
        }

        private void MergeView_PreviewMouseMove(object sender, MouseEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                var pos = e.GetPosition(MergeView);
                HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
                if (result == null)
                {
                    return;
                }
                //点击删除按钮
                Button Button = CommonHelper.FindVisualParent<Button>(result.VisualHit);
                if (Button != null)
                {
                    return;
                }
                //点击下拉框
                WritableComboBox writableComboBox = CommonHelper.FindVisualParent<WritableComboBox>(result.VisualHit);
                if (writableComboBox != null)
                {
                    return;
                }
                var treeViewItem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
                if (treeViewItem == null)
                {
                    return;
                }
                DataObject dataObj = new DataObject(treeViewItem);
                DragDrop.DoDragDrop(MergeView, dataObj, DragDropEffects.Move);
                return;
            }

        }

        private void MergeView_Drop(object sender, DragEventArgs e)
        {
            //避免和Grid_Drop事件重复触发，V1.2.0测试完成后可以删除
            //if (IsFile)
            //{
            //    DragDropHelper.Drop(this, e);
            //    string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
            //    (DataContext as MergeDialogViewModel).AddFiles(file);
            //}
            ListViewItem souredata = e.Data.GetData(typeof(ListViewItem)) as ListViewItem;
            if (souredata == null)
            {
                return;
            }
            MergeObject soureNode = souredata.DataContext as MergeObject;
            //防止在外部点击拖入异常
            if (soureNode == null)
            {
                return;
            }
            Point pos = e.GetPosition(MergeView);
            HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
            if (result == null)
            {
                HiddenaAllLine();
                return;
            }
            ListViewItem targetitem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
            if (targetitem == null)
            {
                HiddenaAllLine();
                return;
            }
            MergeObject targetNode = targetitem.DataContext as MergeObject;
            if (soureNode.Equals(targetNode))
            {
                HiddenaAllLine();
                return;
            }
           (DataContext as MergeDialogViewModel).MoveMerge(targetNode, soureNode);
            HiddenaAllLine();
        }

        private void MergeView_DragOver(object sender, DragEventArgs e)
        {
            if (IsFile)
            {
                DragDropHelper.DragOver(this, e);
            }
            ListViewItem sourceitem = e.Data.GetData(typeof(ListViewItem)) as ListViewItem;
            if (sourceitem == null)
            {
                return;
            }
            Point pos = e.GetPosition(MergeView);
            HitTestResult result = VisualTreeHelper.HitTest(MergeView, pos);
            if (result != null)
            {
                ListViewItem treeviewitem = CommonHelper.FindVisualParent<ListViewItem>(result.VisualHit);
                if (treeviewitem != null)
                {
                    if (listViewItem == null)
                    {
                        listViewItem = treeviewitem;
                    }
                    else if (!listViewItem.Equals(treeviewitem))
                    {
                        (listViewItem.DataContext as MergeObject).IsBackwards = false;
                        (listViewItem.DataContext as MergeObject).IsForward = false;
                        listViewItem = treeviewitem;
                    }
                    else
                    {
                        (listViewItem.DataContext as MergeObject).IsBackwards = false;
                        (listViewItem.DataContext as MergeObject).IsForward = false;
                    }
                    if (listViewItem.Equals(sourceitem))
                    {
                        return;
                    }

                    //鼠标位于上半部分显示实线，下半部分显示虚线
                    Point p = treeviewitem.TranslatePoint(new Point(0, 0), MergeView);
                    if (pos.Y < p.Y + 16)
                    {
                        (treeviewitem.DataContext as MergeObject).IsBackwards = true;
                    }
                    else
                    {
                        (treeviewitem.DataContext as MergeObject).IsForward = true;
                    }
                }
            }
        }

        private void MergeView_DragLeave(object sender, DragEventArgs e)
        {
            if (IsFile)
            {
                DragDropHelper.DragLeave();
            }

            HiddenaAllLine();
        }

        /// <summary>
        /// 清理线条显示，以及相关缓存对象
        /// </summary>
        private void HiddenaAllLine()
        {
            if (listViewItem != null)
            {
                (listViewItem.DataContext as MergeObject).IsBackwards = false;
                (listViewItem.DataContext as MergeObject).IsForward = false;
                listViewItem = null;
            }
        }

        private void TextBox_PreviewTextInput(object sender, TextCompositionEventArgs e)
        {
            Regex regex = new Regex("[^0-9.]+");
            e.Handled = regex.IsMatch(e.Text);
        }

        private void TextBoxEx_LostFocus(object sender, RoutedEventArgs e)
        {
            try
            {
                double Tag = Double.Parse((sender as TextBox).Text);
                if (Tag <= 0)
                {
                    (sender as TextBox).Text = "";
                }
            }
            catch (Exception)
            {
                (sender as TextBox).Text = "";
            }
        }

        private void TextBoxEx_PreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                BtnMerge.Focus();
                e.Handled = true;
            }
        }

        private void MergeView_DragEnter(object sender, DragEventArgs e)
        {
            IsFile = false;
            var file = (System.Array)e.Data.GetData(DataFormats.FileDrop);
            if (file == null)//为null 表示内部拖动 触发的
            {
                return;
            }
            foreach (string f in file)
            {
                bool isFolder = Directory.Exists(f);
                if (isFolder)
                {
                    DragDropHelper.DragEnter(this, e);
                    IsFile = true;
                    TraverseFiles(f, null, e);
                }
                else
                {
                    System.IO.FileInfo info = new System.IO.FileInfo(f);
                    //只要拖拽进来的文件里包含有pdf格式文件，就允许拖入
                    if (System.IO.Path.GetExtension(f).ToLower() == ".pdf" && info.Length > 0)
                    {
                        DragDropHelper.DragEnter(this, e);
                        IsFile = true;
                    }
                    //图片格式
                    else if (Properties.Resources.imageex.Contains(System.IO.Path.GetExtension(f).ToLower()) && info.Length > 0)
                    {

                        DragDropHelper.DragEnter(this, e);
                        IsFile = true;
                    }
                }
            }
        }

        private void Grid_Drop(object sender, DragEventArgs e)
        {
            if (IsFile)
            {
                DragDropHelper.Drop(this, e);
                string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
                bool isFolder = Directory.Exists(file[0]);
                if (isFolder)
                {
                    string file1 = file[0];
                    List<string> names = new List<string>();
                    TraverseFiles(file1, names);
                    (DataContext as MergeDialogViewModel).AddFiles(names.ToArray());
                }
                else
                {
                    (DataContext as MergeDialogViewModel).AddFiles(file);
                }

            }
        }

        private void Grid_DragEnter(object sender, DragEventArgs e)
        {
            IsFile = false;
            var file = (System.Array)e.Data.GetData(DataFormats.FileDrop);
            if (file == null)//为null 表示内部拖动 触发的
            {
                return;
            }
            foreach (string f in file)
            {
                bool isFolder = Directory.Exists(f);
                if (isFolder)
                {
                    DragDropHelper.DragEnter(this, e);
                    IsFile = true;
                    TraverseFiles(f, null, e);
                }
                else
                {
                    System.IO.FileInfo info = new System.IO.FileInfo(f);
                    //只要拖拽进来的文件里包含有pdf格式文件，就允许拖入
                    if (System.IO.Path.GetExtension(f).ToLower() == ".pdf" && info.Length > 0)
                    {
                        DragDropHelper.DragEnter(this, e);
                        IsFile = true;
                    }
                    //图片格式
                    else if (Properties.Resources.imageex.Contains(System.IO.Path.GetExtension(f).ToLower()) && info.Length > 0)
                    {

                        DragDropHelper.DragEnter(this, e);
                        IsFile = true;
                    }
                }

            }
        }

        private void Grid_DragOver(object sender, DragEventArgs e)
        {
            if (IsFile)
            {
                DragDropHelper.DragOver(this, e);
            }
        }

        private void Grid_DragLeave(object sender, DragEventArgs e)
        {
            if (IsFile)
            {
                DragDropHelper.DragLeave();
            }
        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            NoFileText.Text = App.MainPageLoader.GetString("Merge_Hint");

            TitleFileName.Text = App.MainPageLoader.GetString("Merge_TitleFileName");
            TitlePageRange.Text = App.MainPageLoader.GetString("Merge_TitlePageRange");
            TitleSize.Text = App.MainPageLoader.GetString("Merge_TitleSize");

            TxbAddFileText.Text = App.MainPageLoader.GetString("Merge_AddFiles");
            MenuAddComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddFiles");
            MenuAddFolderComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddFolder");
            MenuAddOpenFileComboBoxItem.Header = App.MainPageLoader.GetString("Merge_AddOpenFile");

            BtnMerge.Content = App.MainPageLoader.GetString("Merge_Yes");
            BtnCancel.Content = App.MainPageLoader.GetString("Merge_No");
        }

        private void PageRangeWritableComboBox_LostFocus(object sender, RoutedEventArgs e)
        {
            WritableComboBox writableComboBox = sender as WritableComboBox;
            var ls = writableComboBox.DataContext as MergeObject;
            if (ls != null)
            {
                foreach (var a in ls.SetPageRange)
                {
                    Trace.WriteLine(a);
                }
            }
        }

        private void BtnAddFile_Initialized(object sender, EventArgs e)
        {
            var btn = sender as Button;
            if (btn != null)
            {
                btn.ContextMenu = null;
            }
        }

        private void BtnAddFile_Click(object sender, RoutedEventArgs e)
        {
            CmAddFile.PlacementTarget = BtnAddFile;
            CmAddFile.Placement = System.Windows.Controls.Primitives.PlacementMode.Bottom;
            CmAddFile.IsOpen = true;
        }
        /// <summary>
        /// 文件夹遍历
        /// </summary>
        /// <param name="folderPath"></param>
        /// <param name="names"></param>
        public void TraverseFiles(string folderPath, List<string> names, DragEventArgs e = null)
        {
            // 获取当前文件夹下的所有文件
            string[] files = Directory.GetFiles(folderPath);

            foreach (string file in files)
            {
                if (names != null) { names.Add(file); }
                // 处理文件


                if (e != null)
                {
                    System.IO.FileInfo info = new System.IO.FileInfo(file);
                    //只要拖拽进来的文件里包含有pdf格式文件，就允许拖入
                    if (System.IO.Path.GetExtension(file).ToLower() == ".pdf" && info.Length > 0)
                    {
                        DragDropHelper.DragEnter(this, e);
                        IsFile = true;
                    }
                    //图片格式
                    else if (Properties.Resources.imageex.Contains(System.IO.Path.GetExtension(file).ToLower()) && info.Length > 0)
                    {

                        DragDropHelper.DragEnter(this, e);
                        IsFile = true;
                    }
                }
            }

            // 获取当前文件夹下的所有子文件夹
            string[] subFolders = Directory.GetDirectories(folderPath);

            foreach (string subFolder in subFolders)
            {
                // 递归遍历子文件夹中的文件
                TraverseFiles(subFolder, names);
            }
        }
    }
}