using Microsoft.Win32;
using PDF_Master.CustomControl.SystemControl;
using PDF_Master.Model;
using PDF_Master.EventAggregators;
using PDF_Master.Views;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using ComPDFKitViewer.PdfViewer;
using Dragablz;
using System.Windows;
using Prism.Ioc;
using PDF_Master.CustomControl;
using Prism.Services.Dialogs;
using PDF_Master.Properties;
using PDF_Master.Helper;
using PDFSettings;
using PDF_Master.ViewModels.Dialog.ServiceDialog;
using System.Diagnostics;

namespace PDF_Master.ViewModels
{
    public class MainWindowViewModel : BindableBase
    {
        private MainContent selectedItem;
        private LoginDialogViewModel LoginDialogViewModel;

        #region 文案

        private string T_rename;

        public string T_Rename
        {
            get { return T_rename; }
            set
            {
                SetProperty(ref T_rename, value);
            }
        }
        private string _Msgtologin = "";

        public string Msgtologin
        {
            get { return _Msgtologin; }
            set
            {
                SetProperty(ref _Msgtologin, value);
            }
        }


        private void InitString()
        {

            Msgtologin = App.ServiceLoader.GetString("Msgtologin");

        }


        #endregion
        public MainContent SelectedItem
        {
            get { return selectedItem; }
            set
            {
                SetProperty(ref selectedItem, value);
                if (SelectedItem != null)
                {
                    var pdfviewer = (SelectedItem.DataContext as MainContentViewModel).PDFViewer;
                    if (pdfviewer != null)
                    {
                        CurrentPDFViewer = pdfviewer;
                    }
                    else
                    {
                        CurrentPDFViewer = null;
                    }
                }
            }
        }

        private string progresstitle;

        /// <summary>
        /// 进度控件标题
        /// </summary>
        public string ProgressTitle
        {
            get { return progresstitle; }
            set
            {
                SetProperty(ref progresstitle, value);
            }
        }

        private double processvalue = 0;

        /// <summary>
        /// 进度条当前值
        /// </summary>
        public double Value
        {
            get { return processvalue; }
            set
            {
                SetProperty(ref processvalue, value);
            }
        }

        private double maxValue = 100;

        /// <summary>
        /// 进度条最大值
        /// </summary>
        public double MaxValue
        {
            get { return maxValue; }
            set
            {
                SetProperty(ref maxValue, value);
            }
        }

        private string _Useremailchar = "#";

        public string Useremailchar
        {
            get { return _Useremailchar; }
            set
            {
                SetProperty(ref _Useremailchar, value);

            }
        }

        /// <summary>
        /// UpgradeVis按钮只在订阅期中显示
        /// </summary>
        private Visibility _UpgradeVis = Visibility.Visible;

        public Visibility UpgradeVis
        {
            get { return _UpgradeVis; }
            set
            {
                SetProperty(ref _UpgradeVis, value);
            }
        }
        /// <summary>
        ///提示登录高级功能
        /// </summary>
        private Visibility _OphVis = Visibility.Collapsed;

        public Visibility OphVis
        {
            get { return _OphVis; }
            set
            {
                SetProperty(ref _OphVis, value);
            }
        }


        private Visibility _RegisterVis = Visibility.Collapsed;

        public Visibility RegisterVis
        {
            get { return _RegisterVis; }
            set
            {
                SetProperty(ref _RegisterVis, value);
            }
        }



        private Visibility _LoginVis = Visibility.Collapsed;

        public Visibility LoginVis
        {
            get { return _LoginVis; }
            set
            {
                SetProperty(ref _LoginVis, value);
            }
        }

        private Visibility _UserVis = Visibility.Collapsed;

        public Visibility UserVis
        {
            get { return _UserVis; }
            set
            {
                SetProperty(ref _UserVis, value);
            }
        }

        private Visibility isProcessVisible = Visibility.Collapsed;

        /// <summary>
        /// OCR进度条是否显示
        /// </summary>
        public Visibility IsProcessVisible
        {
            get { return isProcessVisible; }
            set
            {
                SetProperty(ref isProcessVisible, value);
                if (value == Visibility.Visible)
                {
                    //还原关闭按钮的显示状态，修复:自动保存后，转档功能的关闭按钮不显示
                    ProcessCloseBtnVisible = Visibility.Visible;
                }
            }
        }

        private Visibility processCloseBtnVisible = Visibility.Visible;
        /// <summary>
        /// 进度条控件的关闭按钮是否可见
        /// </summary>
        public Visibility ProcessCloseBtnVisible
        {
            get { return processCloseBtnVisible; }
            set
            {
                SetProperty(ref processCloseBtnVisible, value);
            }
        }


        /// <summary>
        /// 进度条关闭的事件
        /// </summary>
        public Action ProcessCloseAction;

        private bool isCloseAllEnable = false;

        public bool IsCloseAllEnable
        {
            get { return isCloseAllEnable; }
            set
            {
                SetProperty(ref isCloseAllEnable, value);
            }
        }

        public DelegateCommand CloseAllTabCommand { get; set; }

        private CPDFViewer pdfViewer;

        /// <summary>
        /// 当前页签的PdfViewer对象
        /// </summary>
        public CPDFViewer CurrentPDFViewer
        {
            get { return pdfViewer; }
            set { pdfViewer = value; }
        }

        public DelegateCommand AddTab { get; set; }

        /// <summary>
        /// 关闭OCR进度条
        /// </summary>
        public DelegateCommand CloseOCRCommand { get; set; }

        public DelegateCommand OpenRegisterCommand { get; set; }
        public DelegateCommand OpenLoginCommand { get; set; }
        public DelegateCommand OpenUserCommand { get; set; }
        public DelegateCommand LoadCommand { get; set; }
        public DelegateCommand UpgradelinkCommand { get; set; }
       

        public IRegionManager region;

        public IEventAggregator eventer;

        public IDialogService dialogs;

        private IContainerProvider containerProvider;

        public IInterTabClient InterTabClient { get; }

        public MainWindowViewModel(IRegionManager regionManager, IEventAggregator eventAggregator, IContainerProvider container, IDialogService dialogService)
        {
            if (App.mainWindowViewModel == null)
            {
                //加载第一个窗体时 先赋值静态对象
                App.mainWindowViewModel = this;
            }
            dialogs = dialogService;

            region = regionManager;

            eventer = eventAggregator;

            containerProvider = container;

            InterTabClient = new InterTabClient(container);

            AddTab = new DelegateCommand(AddTabItem);
            CloseOCRCommand = new DelegateCommand(closeocr);
            OpenRegisterCommand = new DelegateCommand(OpenRegister);
            OpenLoginCommand = new DelegateCommand(OpenLogin);
            OpenUserCommand = new DelegateCommand(OpenUser);
            UpgradelinkCommand= new DelegateCommand(Upgradelink);
            CloseAllTabCommand = new DelegateCommand(() =>
            {
                if (closeAllTabItem())
                {
                    App.Current.MainWindow.Close();
                }
            });

            //第一次打开时需要自动加载Home页
            if (App.IsFirstOpen)
            {
                System.Windows.Application.Current.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Send, new Action(() =>
                {

                    //重新打开窗口关闭前 未关闭的页签
                    if (Settings.Default.AppProperties.NeedToOpenFileList != null && Settings.Default.AppProperties.NeedToOpenFileList.Count > 0)
                    {
                        List<string> files = Settings.Default.AppProperties.NeedToOpenFileList;


                        foreach (var file in files)
                        {
                            this.AddTabItem(file);
                        }

                        Settings.Default.AppProperties.NeedToOpenFileList.Clear();
                        Settings.Default.Save();
                        return;
                    }
                    else
                    {
                        //如果有拖拽文件到图标或者设为默认阅读器的情况，双击文件打开软件时，不加载首页
                        if ((App.Current.MainWindow as MainWindow) != null && (App.Current.MainWindow as MainWindow).TabablzControl.Items.Count <= 0)
                        {
                            region.RequestNavigate(RegionNames.MainRegion, "MainContent");
                        }
                    }

                    try
                    {
                        //避免注册弹窗和新手引导弹窗一起弹出
                        //if (App.IsShowRegist && !Settings.Default.IsNewUser)
                        //{
                        //    OpenRegister();
                        //}

                        //新用户弹出引导弹窗
                        if (Settings.Default.IsNewUser)
                        {
                            if (ShowGuidDialog())
                            {
                                //未点击下次再看时，下次启动窗体不再显示
                                Settings.Default.IsNewUser = false;
                                Settings.Default.Save();
                            }
                        }
                    }
                    catch { }
                }
                ));

                App.IsFirstOpen = false;
                //因为远程广告模块没有时间测试正式环境，暂时取消
                //ADServiceHelper.GetAD("PDFMasterWindows");


            }
            //判断本地有没有token，没有显示登录，有再判断登录状态
            if (Settings.Default.AppProperties.LoginToken != "")
            {

                if (ServiceHelper.GetUser() == "401")
                {

                    LoginVis = Visibility.Visible;
                    OphVis = Visibility.Visible;
                }
                else
                {
                    App.IsLogin = true;
                    Useremailchar = Settings.Default.UserDate.Email.Substring(0, 1);
                    UserVis = Visibility.Visible;
                }
            }
            else
            {
                LoginVis = Visibility.Visible;
                OphVis = Visibility.Visible;
            }

            InitString();
        }

       

            private void Upgradelink()
        {
            Process.Start(new ProcessStartInfo("http://test-pdf-pro.kdan.cn:3021/master/checkout?email="+Settings.Default.UserDate.Email));
        }
        //显示新手引导弹窗
        private bool ShowGuidDialog()
        {
            bool result = true;
            dialogs.ShowDialog(DialogNames.GuidDialog, null, r =>
            {
                if (r.Result == ButtonResult.Ignore)
                {
                    result = false;
                }
            });
            return result;
        }

        //打开注册弹窗
        public void OpenRegister()
        {
            dialogs.ShowDialog(DialogNames.RegisterDialog);
            //优化部分设备上 进入阅读页后关闭注册窗体时 主窗体置底的问题
            App.Current.MainWindow.Activate();
        }

        //打开登录弹窗
        public void OpenLogin()
        {
            dialogs.ShowDialog(DialogNames.LoginDialog);
        }

        public void OpenRegisterOK()
        {
            dialogs.ShowDialog(DialogNames.RegisterOKRegion);
        }

        public void OpenLoginoff()
        {
            dialogs.ShowDialog(DialogNames.LoginoffDialog);
        }

        //打开用户弹窗
        public void OpenUser()
        {          //判断本地有没有token，没有显示登录，有再判断登录状态
            if (Settings.Default.AppProperties.LoginToken != "")
            {

                if (ServiceHelper.GetUser() == "401")
                {

                    UserVis = Visibility.Collapsed;
                    LoginVis = Visibility.Visible;
                    OphVis = Visibility.Visible;
                    if (Settings.Default.UserDate.IsLoginoff == false)
                    {
                        App.mainWindowViewModel.OpenLoginoff();
                        Settings.Default.UserDate.IsLoginoff = true;
                        Settings.Default.Save();
                    }


                }
                else
                {

                    Useremailchar = Settings.Default.UserDate.Email.Substring(0, 1);
                    App.mainWindowViewModel.UserVis = Visibility.Visible;
                    dialogs.ShowDialog(DialogNames.UserDialog);
                }
            }
            else
            {

                LoginVis = Visibility.Visible;
                OphVis = Visibility.Visible;
                OpenLogin();
            }

        }

        /// <summary>
        /// 关闭OCR
        /// </summary>
        private void closeocr()
        {

            if (ProcessCloseAction != null)
            {
                ProcessCloseAction.Invoke();
            }
        }

        /// <summary>
        /// 单击+号时添加页签
        /// </summary>
        private void AddTabItem()
        {
            region.RequestNavigate(RegionNames.MainRegion, "MainContent");
            CheckViewsCount();
        }

        /// <summary>
        /// 选择多文档打开时
        /// </summary>
        /// <param name="filePath"></param>
        public void AddTabItem(string filePath)
        {
            NavigationParameters parameters = new NavigationParameters
            {
                { ParameterNames.FilePath, filePath }
            };
            region.RequestNavigate(RegionNames.MainRegion, "MainContent", parameters);
            CheckViewsCount();
        }

        /// <summary>
        /// 关闭所有页签
        /// </summary>
        public bool closeAllTabItem()
        {
            //下一次重新打开未关闭的文档
            if (Settings.Default.AppProperties.Description.OpenUnClosedFileWhenOpen)
            {
                Settings.Default.AppProperties.NeedToOpenFileList = App.OpenedFileList;
                Settings.Default.Save();
            }

            while (region.Regions[RegionNames.MainRegion].Views.Count() > 0)
            {
                if (CurrentPDFViewer != null && CurrentPDFViewer.UndoManager.CanSave)
                {
                    ContentResult result = ShowSaveDialog((SelectedItem.DataContext as MainContentViewModel).viewContentViewModel);
                    if (result == ContentResult.Cancel)
                    {
                        //如果是设置了，保存前不显示弹窗提示的功能，则点击取消时也可以关闭
                        //否则，会变成：用户必须要点击保存按钮才能关闭窗体，不合理
                        if (Settings.Default.AppProperties.Description.NotShowSaveWhenClose)
                        {
                            return true;
                        }
                        else
                        {
                            //普通模式下，点击了取消按钮，则不进行后续的关闭等操作
                            return false;
                        }
                    }
                }
                if (selectedItem != null)
                {
                    region.Regions[RegionNames.MainRegion].Remove(selectedItem);
                }

                //多窗体情况下，单个窗体的所有页签均已关闭时，返回true，允许关闭窗体
                if (selectedItem == null)
                {
                    return true;
                }
            }
            return true;
        }

        /// <summary>
        /// 设置value值小于MaxValue值时 自动显示
        /// Value值 大于等于MaxValue值时，自动隐藏
        /// </summary>
        public async void SetProcessValue(string title, double value, double maxvalue, bool showClose = true)
        {
            ProgressTitle = title;
            if (value < 0)
            {
                //异常处理
                this.Value = 0;
            }

            if (maxvalue < 0)
            {
                //异常处理
                this.MaxValue = 0;
            }

            if (value < maxvalue)
            {
                this.Value = value;
                this.MaxValue = maxvalue;
                if (IsProcessVisible != Visibility.Visible)
                {
                    IsProcessVisible = Visibility.Visible;
                }
            }
            else
            {
                //进度完成后自动隐藏
                this.Value = value;
                this.MaxValue = maxvalue;
                //为了能看到进度条实际到100的效果
                await Task.Delay(150);
                IsProcessVisible = Visibility.Collapsed;
            }

            ProcessCloseBtnVisible = showClose ? Visibility.Visible : Visibility.Collapsed;
        }

        public void CloseTabItem(object item)
        {
            //获取x号所在的maincontentviewmodel对象
            var maincontentViewModel = (item as MainContent).DataContext as MainContentViewModel;
            //如果已经有打开文档，先切换到目标页签
            if (maincontentViewModel.PDFViewer != null && maincontentViewModel.PDFViewer.Document != null)
            {
                SelectItem(maincontentViewModel.PDFViewer.Document.FilePath);
            }

            //可以保存时，弹窗询问提示弹窗
            if (maincontentViewModel.PDFViewer != null && maincontentViewModel.PDFViewer.UndoManager.CanSave)
            {
                ContentResult result = ShowSaveDialog(maincontentViewModel.viewContentViewModel);
                //此处要加上第二个判断，如果去除第二个判断，则新建文件后，点击关闭按钮，不选择保存路径时，无法关闭页签
                if (result == ContentResult.Cancel && !Settings.Default.AppProperties.Description.NotShowSaveWhenClose)
                {
                    //非自动保存且取消了另存为时
                    return;
                }
            }
            //这里不能加Else 需要分开写If 否则会出现无法关闭页签的情况
            //不要保存 可以直接关闭页签时(有多个页签时)
            if (region.Regions[RegionNames.MainRegion].Views.Count() > 1)
            {
                region.Regions[RegionNames.MainRegion].Remove(item);
                CheckViewsCount();

                //关闭子窗体的最后一个页签时，子窗体关闭(不显示首页)，参考福昕逻辑
                if ((App.Current.MainWindow as MainWindow).TabablzControl.Items.Count == 0)
                {
                    App.Current.MainWindow.Close();
                }
            }
            else
            {
                //只剩一个页签的情况
                if (maincontentViewModel.PDFViewer != null)
                {
                    // 如果是关闭文档的页签 则回到首页
                    region.Regions[RegionNames.MainRegion].Remove(item);
                    region.RequestNavigate(RegionNames.MainRegion, "MainContent");
                }
                else
                {
                    // 如果是关闭首页则关闭软件
                    region.Regions[RegionNames.MainRegion].Remove(item);
                    App.Current.MainWindow.Close();
                }
            }
        }

        /// <summary>
        /// 检查页签个数 更新close allcommand 命令状态
        /// </summary>
        private void CheckViewsCount()
        {
            if (region.Regions[RegionNames.MainRegion].Views.Count() > 1)
            {
                IsCloseAllEnable = true;
            }
            else
            {
                IsCloseAllEnable = false;
            }
        }

        public void SelectItem(string filepath)
        {
            var item = region.Regions[RegionNames.MainRegion].Views.Where(t => ((t as MainContent).DataContext as MainContentViewModel).FilePath == filepath).FirstOrDefault() as MainContent;
            if (item == null)
                return;

            region.Regions[RegionNames.MainRegion].Activate(item);
            var behavior = region.Regions[RegionNames.MainRegion].Behaviors[DragablzWindowBehavior.BehaviorKey] as DragablzWindowBehavior;
            if (behavior != null)
            {
                behavior.ActivateView(item);
            }
        }

        /// <summary>
        /// 显示关闭询问弹窗
        /// </summary>
        /// <param name="pdfViewer"></param>
        /// <returns></returns>
        private ContentResult ShowSaveDialog(ViewContentViewModel viewContentViewModel)
        {
            ContentResult result = ContentResult.Ok;
            if (!Settings.Default.AppProperties.Description.NotShowSaveWhenClose)
            {
                //偏好设置里未设置直接保存时，需要弹窗提示
                AlertsMessage alertsMessage = new AlertsMessage();
                alertsMessage.ShowDialog("", string.Format(App.MainPageLoader.GetString("Main_ModifiedFileWarning"), System.IO.Path.GetFileName(CurrentPDFViewer.Document.FilePath)), App.ServiceLoader.GetString("Text_cancel"), App.ServiceLoader.GetString("Text_no"), App.ServiceLoader.GetString("Text_ok"));
                result = alertsMessage.result;
            }

            if (result == ContentResult.Ok)
            {
                var isSave = viewContentViewModel.saveFile();
                if (isSave == false)
                    result = ContentResult.Cancel;
            }
            return result;
        }
    }
}