using CMS_SC_Data;
using System;
using System.IO;
using System.Web;
using System.Web.UI.WebControls;

namespace CMS_SC.WebUserControls
{
  public partial class mod_fileUpload : SteamWare.UserControl
  {
    /// <summary>
    /// selezione valore in DettScheda
    /// </summary>
    public event EventHandler eh_fileMod;
    /// <summary>
    /// sollevo evento selezione
    /// </summary>
    protected void raiseEvent()
    {
      // sollevo evento nuovo valore...
      if (eh_fileMod != null)
      {
        eh_fileMod(this, new EventArgs());
      }
    }
    /// <summary>
    /// abilita modifica/cancellazione allegati
    /// </summary>
    public bool enableMod { get; set; }
    /// <summary>
    /// caricamento pagina
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Page_Load(object sender, EventArgs e)
    {
      this.Page.Form.Enctype = "multipart/form-data";
      fisVisFU(enableMod);
      if (!IsPostBack)
      {
        fisVisFU(false);
        grView.DataBind();
      }
      divNewEdit.Visible = isWriteEnabled && enableMod;
    }
    /// <summary>
    /// Chiave di filtraggio dati...
    /// </summary>
    public string filtKey
    {
      get
      {
        return hfFiltKey.Value;
      }
      set
      {
        hfFiltKey.Value = value;
      }
    }

    protected void Upload(object sender, EventArgs e)
    {
      if (FileUploadControl.HasFile)
      {
        string filename = Path.GetFileName(FileUploadControl.PostedFile.FileName);
        string contentType = FileUploadControl.PostedFile.ContentType;
        using (Stream fs = FileUploadControl.PostedFile.InputStream)
        {
          using (BinaryReader br = new BinaryReader(fs))
          {
            byte[] bytes = br.ReadBytes((Int32)fs.Length);
            // PROCEDO SOLO SE HO UN FILE!!!! ovvero bytes <> null
            if (bytes.Length > 0)
            {
              // controllo se sia caricamento o update...
              if (grView.SelectedIndex != -1)
              {
                try
                {
                  int orig_idxFile = Convert.ToInt32(grView.SelectedValue);
                  DtProxy.man.taFiles.updateQuery(filename, filtKey, contentType, bytes, orig_idxFile);
                }
                catch
                { }
              }
              else
              {
                DtProxy.man.taFiles.insertQuery(filename, filtKey, contentType, bytes);
              }
            }
          }
        }
        grView.DataBind();
        raiseEvent();
      }
    }

    protected void DownloadFile(object sender, EventArgs e)
    {
      int idxFile = int.Parse((sender as LinkButton).CommandArgument);
      byte[] bytes;
      string fileName, contentType;
      CMS_SC_Data.DS_Utility.tblFilesRow fileRow = DtProxy.man.taFiles.getByKey(idxFile)[0];
      bytes = fileRow.Data;
      contentType = fileRow.ContentType;
      fileName = fileRow.FileName;
      Response.Clear();
      Response.Buffer = true;
      Response.Charset = "";
      Response.Cache.SetCacheability(HttpCacheability.NoCache);
      Response.ContentType = contentType;
      Response.AppendHeader("Content-Disposition", "attachment; filename=" + fileName);
      Response.BinaryWrite(bytes);
      Response.Flush();
      Response.End();
    }

    protected void grView_SelectedIndexChanged(object sender, EventArgs e)
    {
      // mostro controllo x edit...  
      fisVisFU(true);
    }
    
    /// <summary>
    /// fix visibilità controllo file upload
    /// </summary>
    /// <param name="showAdd">mostra controlli add=true oppure nasconde = false</param>
    private void fisVisFU(bool showAdd)
    {
      bool fileSel = grView.SelectedIndex >= 0;
      FileUploadControl.Visible = showAdd;
      lbtAddNew.Visible = !showAdd;
      lbtUpload.Visible = showAdd && !fileSel;
      lbtReplace.Visible = showAdd && fileSel;
      lbtCancel.Visible = showAdd;
      if (grView.SelectedIndex != -1 && !showAdd)
      {
        grView.SelectedIndex = -1;
      }
    }
    

    protected void lbtAddNew_Click(object sender, EventArgs e)
    {
      fisVisFU(true);
    }

    protected void lbtCancel_Click(object sender, EventArgs e)
    {
      fisVisFU(false);
    }
    protected void btnReset_Click(object sender, EventArgs e)
    {
      resetSelezione();
    }
    /// <summary>
    /// resetto selezione
    /// </summary>
    private void resetSelezione()
    {
      grView.SelectedIndex = -1;
      grView.DataBind();
      fisVisFU(false);
    }
  }
}