using Lskj.Business.Impl;
using Lskj.Control;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Web;
using System.Windows.Forms;
using Xilium.CefGlue;
using Lskj.Control.Model;
using System.Runtime.InteropServices;

namespace Lskj.Control.BrowserSetting
{
    public class BsDownloadHandler : CefDownloadHandler
    {
        [DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
        public static extern IntPtr GetParent(IntPtr hWnd);

        private BsClient BsClient;
        public BsDownloadHandler(BsClient bsClient)
        {
            BsClient = bsClient;
        }
        protected override void OnBeforeDownload(CefBrowser browser, CefDownloadItem downloadItem, string suggestedName, CefBeforeDownloadCallback callback)
        {
            //callback.Continue(string.Empty, true);
            try
            {
                string tipMsg = string.Empty; int vsNum = 0;
                if (string.IsNullOrWhiteSpace(downloadItem.SuggestedFileName))
                {
                    if (BsClient != null && BsClient.frmWebBrowser != null)
                    {
                        BsClient.frmWebBrowser.Invoke(new Action(() =>
                        {
                            MessageUtil.Show("当前文档类型不支持预览");
                        }));
                    }
                    if (BsClient != null && BsClient.frmWebBrowser != null && BsClient.frmWebBrowser.Parent != null && BsClient.frmWebBrowser.Parent.Name.Equals("previewFrm"))
                    {
                        BsClient.frmWebBrowser.CloseBrowser();
                    }
                    else if (BsClient != null && BsClient.frmWebBrowser != null)
                    {
                        BsClient.frmWebBrowser.LoadUrl("file:///C:/Users/asus/Desktop/errorFileNotFound.html");//加载错误异常,文件不存在
                    }
                    return;
                }
                string[] webpaths = Regex.Split(downloadItem.Url, "fileRoot/", RegexOptions.IgnoreCase);
                string webpath = webpaths[webpaths.Length - 1];


                string szFilename = downloadItem.Url.Substring(downloadItem.Url.LastIndexOf('/') + 1);//简单处理文件名，实际中还需要单独处理，这里有BUG
                string SzFileName = HttpUtility.UrlDecode(szFilename);
                string[] szName = SzFileName.Split('/');
                string fileTitle = szName[szName.Length - 1];
                //downfile(e.Url, e.Filename, tempPath);
                if (fileTitle.Contains("?")) fileTitle = fileTitle.Substring(0, fileTitle.LastIndexOf('?'));
                DataRow rowItem = AttachImpl.GetTempletFile(fileTitle, webpath);
                string topname = downloadItem.SuggestedFileName.Substring(0, downloadItem.SuggestedFileName.LastIndexOf(".") - 1);
                bool isMultipleLoad = downloadItem.Url.Contains("downLoadTemp") && Regex.IsMatch(topname, @"^[+-]?\d*[.]?\d*$");
                if (downloadItem.Url.StartsWith("blob"))
                {
                    callback.Continue(string.Empty, true);
                    //Download(downloadItem.Url, fileTitle);
                    //return;
                }
                else if (rowItem != null || isMultipleLoad)
                {
                    try
                    {
                        bool success = rowItem != null ? AttachImpl.CheckAttachOperation(2, "", Convert.ToInt32(rowItem["fileId"]), "", 0, out tipMsg) == 1 : isMultipleLoad;
                        if (success)
                        {
                            string ModuleCode = string.Empty;
                            GetParentForm(browser, out ModuleCode);
                            Download(downloadItem.Url, fileTitle, ModuleCode);
                            return;
                        }
                        else
                        {
                            MessageBox.Show(tipMsg);
                            //MessageUtil.Show(tipMsg);
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("下载失败！\r\n" + ex.Message);
                        //MessageUtil.Show("下载失败！\r\n" + ex.Message);
                    }
                }
                else
                {
                    MessageBox.Show("未找到下载项");
                }
                //browser.GetHost().CloseBrowser();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }
        protected override void OnDownloadUpdated(CefBrowser browser, CefDownloadItem downloadItem, CefDownloadItemCallback callback)
        {
            //if (downloadItem.IsComplete)
            //{
            //    MessageBox.Show("下载成功");
            //    if (browser.IsPopup && !browser.HasDocument)
            //    {
            //        //browser.GetHost().ParentWindowWillClose();
            //        browser.GetHost().CloseBrowser();
            //    }
            //}
            //downloadItem.IsComplete

            //if (downloadItem.IsComplete) { 
            //    string tipMsg = string.Empty; int vsNum = 0;
            //    DataRow rowItem = AttachImpl.GetTempletFile(downloadItem.SuggestedFileName);
            //    string topname = downloadItem.SuggestedFileName.Substring(0, downloadItem.SuggestedFileName.LastIndexOf(".") - 1);
            //    bool isMultipleLoad = downloadItem.Url.Contains("downLoadTemp") && Regex.IsMatch(topname, @"^[+-]?\d*[.]?\d*$");
            //    if (rowItem != null || isMultipleLoad)
            //    {
            //        try
            //        {
            //            bool success = rowItem != null ? AttachImpl.CheckAttachOperation(2, "", Convert.ToInt32(rowItem["fileId"]), "", 0, out tipMsg) == 1 : isMultipleLoad;
            //            if (success)
            //            {
            //                string szFilename = downloadItem.Url.Substring(downloadItem.Url.LastIndexOf('/') + 1);//简单处理文件名，实际中还需要单独处理，这里有BUG

            //                string SzFileName = HttpUtility.UrlDecode(szFilename);
            //                string[] szName = SzFileName.Split('/');
            //                //downfile(e.Url, e.Filename, tempPath);
            //                Download(downloadItem.Url, szName[szName.Length - 1]);
            //                return;
            //            }
            //            else
            //            {
            //                MessageUtil.Show(tipMsg);
            //            }
            //        }
            //        catch (Exception ex)
            //        {
            //            MessageUtil.Show("下载失败！\r\n" + ex.Message);
            //        }
            //    }
            //    else
            //    {
            //        MessageUtil.Show("未找到下载项");
            //    }
            //    //browser.GetHost().CloseBrowser();
            //}
        }
        /// <summary>
        /// <para>说明：定义服务器文件地址，含文件名。客户端接收地址及文件名由客户端自行定义</para>
        /// <para>创建人：王一帆</para>
        /// <para>创建日期： </para>
        /// <para>修改人：</para>
        /// <para>修改日期：</para>
        /// <para>修改备注：</para>
        /// <para>版本：1.0</para>
        /// </summary>
        /// <param name="URL">The URL.</param>
        /// <param name="FileName">Name of the file.</param>
        public static void Download(string URL, string FileName,string ModuleCode)
        {
            FrmSelectDownload frmSelectDownload = new FrmSelectDownload();
            frmSelectDownload.URL = URL;
            frmSelectDownload.FileName = FileName;
            frmSelectDownload.ModelId = ModuleCode;
            frmSelectDownload.Show();
            //SaveFileDialog saveFileDialog = new SaveFileDialog();
            //saveFileDialog.FileName = FileName;
            //saveFileDialog.Title = "下载模板文件到";
            //saveFileDialog.RestoreDirectory = true;
            ////点了保存按钮进入
            //if (saveFileDialog.ShowDialog() == DialogResult.OK)
            //{
            //    string localFilePath = System.IO.Path.GetFullPath(saveFileDialog.FileName);//获得文件路径，含文件名
            //    string fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);//获取文件名，不带路径
            //    string FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf("\\"));//获取文件路径，不带文件名
            //    FrmDownload frm = new FrmDownload(URL, FileName, localFilePath);
            //    frm.Show();
            //}
        }
        /// <summary>
        /// 通过 CefBrowser 获取所在的 WinForms 窗口
        /// </summary>
        public static Form GetParentForm(CefBrowser browser,out string ModuleCode)
        {
            ModuleCode = "";
            try
            {
                if (browser == null) return null;
                IntPtr browserHandle;
                using (var browserHost = browser.GetHost())
                {
                    browserHandle = browserHost.GetWindowHandle();
                }
                if (browserHandle == IntPtr.Zero) return null;
                IntPtr parentHandle = GetParent(browserHandle);
                System.Windows.Forms.Control control = null;
                while (parentHandle != IntPtr.Zero && control == null)
                {
                    // The CEF child now sits inside an application-owned native
                    // host. Walk through that host to preserve the original
                    // FrmWebBrowser-based module lookup.
                    control = System.Windows.Forms.Control.FromHandle(parentHandle);
                    parentHandle = GetParent(parentHandle);
                }

                if (control == null) return null;

                if (control != null && control.Parent != null && control.Parent.Parent != null)
                {
                    ModuleCode = (control.Parent.Parent).Tag + "";
                }

                return control as Form;
            }
            catch (Exception ex) 
            {
                
            }
            return null;
        }
    }
}