using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Microsoft.Office.Interop.Excel;
using System.Diagnostics;
using System.IO;
using Microsoft.Office.Interop.Word;

namespace Suya.Web.Apps.Areas.PMP.Controllers
{
    /// <summary>
    /// 線上預覽Office檔案
    /// </summary>
    public class OfficeViewController : Controller
    {
        #region Index頁面
        /// <summary>
        /// Index頁面
        /// </summary>
        /// <paramname="url">例：/uploads/......XXX.xls</param>
        public ActionResult Index(stringurl)
        {
            stringphysicalPath = Server.MapPath(Server.UrlDecode(url));
            stringextension = Path.GetExtension(physicalPath);

            stringhtmlUrl = "";
            switch(extension.ToLower())
            {
               case ".xls":
               case ".xlsx":
                   htmlUrl = PreviewExcel(physicalPath, url);
                   break;
               case ".doc":
               case ".docx":
                   htmlUrl = PreviewWord(physicalPath, url);
                   break;
               case ".txt":
                   htmlUrl = PreviewTxt(physicalPath, url);
                   break;
               case ".pdf":
                   htmlUrl = PreviewPdf(physicalPath, url);
                   break;
               case ".jpg":
               case ".jpeg":
               case ".bmp":
               case ".gif":
               case ".png":
                   htmlUrl = PreviewImg(physicalPath, url);
                   break;
               default:
                   htmlUrl = PreviewOther(physicalPath, url);
                   break;
            }

            returnRedirect(Url.Content(htmlUrl));
        }
        #endregion

        #region 預覽Excel
        /// <summary>
        /// 預覽Excel
        /// </summary>
        public string PreviewExcel(stringphysicalPath, string url)
        {
           Microsoft.Office.Interop.Excel.Application application = null;
           Microsoft.Office.Interop.Excel.Workbook workbook = null;
            application= new Microsoft.Office.Interop.Excel.Application();
            objectmissing = Type.Missing;
            objecttrueObject = true;
           application.Visible = false;
           application.DisplayAlerts = false;
            workbook =application.Workbooks.Open(physicalPath, missing, trueObject, missing, missing,missing,
               missing, missing, missing, missing, missing, missing, missing, missing,missing);
            //Save Excelto Html
            objectformat = Microsoft.Office.Interop.Excel.XlFileFormat.xlHtml;
            stringhtmlName = Path.GetFileNameWithoutExtension(physicalPath) + ".html";
            StringoutputFile = Path.GetDirectoryName(physicalPath) + "\\" + htmlName;
           workbook.SaveAs(outputFile, format, missing, missing, missing,
                             missing, XlSaveAsAccessMode.xlNoChange, missing,
                             missing, missing, missing, missing);
           workbook.Close();
           application.Quit();
            returnPath.GetDirectoryName(Server.UrlDecode(url)) + "\\" + htmlName;
        }
        #endregion

        #region 預覽Word
        /// <summary>
        /// 預覽Word
        /// </summary>
        public string PreviewWord(stringphysicalPath, string url)
        {
           Microsoft.Office.Interop.Word._Application application = null;
           Microsoft.Office.Interop.Word._Document doc = null;
            application= new Microsoft.Office.Interop.Word.Application();
            objectmissing = Type.Missing;
            objecttrueObject = true;
            application.Visible= false;
           application.DisplayAlerts = WdAlertLevel.wdAlertsNone;
            doc =application.Documents.Open(physicalPath, missing, trueObject, missing, missing,missing,
               missing, missing, missing, missing, missing, missing, missing, missing,missing, missing);
            //Save Excelto Html
            objectformat = Microsoft.Office.Interop.Word.WdSaveFormat.wdFormatHTML;
            stringhtmlName = Path.GetFileNameWithoutExtension(physicalPath) + ".html";
            StringoutputFile = Path.GetDirectoryName(physicalPath) + "\\" + htmlName;
           doc.SaveAs(outputFile, format, missing, missing, missing,
                             missing, XlSaveAsAccessMode.xlNoChange, missing,
                             missing, missing, missing, missing);
            doc.Close();
           application.Quit();
            returnPath.GetDirectoryName(Server.UrlDecode(url)) + "\\" + htmlName;
        }
        #endregion

        #region 預覽Txt
        /// <summary>
        /// 預覽Txt
        /// </summary>
        public string PreviewTxt(stringphysicalPath, string url)
        {
            returnServer.UrlDecode(url);
        }
        #endregion

        #region 預覽Pdf
        /// <summary>
        /// 預覽Pdf
        /// </summary>
        public string PreviewPdf(stringphysicalPath, string url)
        {
            returnServer.UrlDecode(url);
        }
        #endregion

        #region 預覽圖片
        /// <summary>
        /// 預覽圖片
        /// </summary>
        public string PreviewImg(stringphysicalPath, string url)
        {
            returnServer.UrlDecode(url);
        }
        #endregion

        #region 預覽其他檔案
        /// <summary>
        /// 預覽其他檔案
        /// </summary>
        public string PreviewOther(stringphysicalPath, string url)
        {
            returnServer.UrlDecode(url);
        }
        #endregion
    }
}