using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using WebLib;

namespace Education.Forms.課程企劃
{
  public partial class 數位課程管理 : FormBase
  {
    private DAC_數位課程 Dao數位課程;
    private string docPath;

    protected void Page_Load(object sender, EventArgs e)
    {
      FunctionName = "數位課程管理";
      Dao數位課程 = new DAC_數位課程(conn);
      //Dao數位課程.CurrentUserId = UserId;

      docPath = Server.MapPath("~/DocUpload");
      if (!Directory.Exists(docPath))
        Directory.CreateDirectory(docPath);

      Form_View = FormView1;
      Grid_View = GridView1;
      FormView_DataSource = dsForm;
      GridView_DataSource = dsGrid;

      AddTabButton(MultiView1, view處理, btn處理);
      AddTabButton(MultiView1, view查詢, btn查詢);

      if (!IsPostBack)
      {
        ActivateTab(MultiView1, view處理);
      }
      else
      {
        Grid_View.DataBind();
        Form_View.DataBind();

        if (pnl挑選課程.Visible)
        {
          gv課程挑選.DataBind();
        }
      }
    }

    protected void dsForm_ObjectCreating(object sender, ObjectDataSourceEventArgs e)
    {
      e.ObjectInstance = Dao數位課程;
    }

    protected void dsGrid_ObjectCreating(object sender, ObjectDataSourceEventArgs e)
    {
      e.ObjectInstance = Dao數位課程;
    }

    protected void btnSearch_Click(object sender, EventArgs e)
    {
      Grid_View.PageIndex = 0;
      Grid_View.DataBind();
    }

    protected override void FormView_ReadOnlyDataBound(object sender, EventArgs e)
    {
      base.FormView_ReadOnlyDataBound(sender, e);
      RegisterPostbackTrigger(Form_View.FindControl("btnUpload1"));
      RegisterPostbackTrigger(Form_View.FindControl("btnUpload2"));
    }

    protected override void FormView_InsertDataBound(object sender, EventArgs e)
    {
      base.FormView_InsertDataBound(sender, e);
      RegisterPostbackTrigger(Form_View.FindControl("btnSave"));
      RegisterPostbackTrigger(Form_View.FindControl("btnCancel"));
      Form_View.FindControl("txt課程名稱").Focus();
      FindControl<TextBox>(Form_View, "txt長度").Text = "0";
      FindControl<ValueCheckBox>(Form_View, "cb開放觀看").Checked = true;
    }

    protected override void FormView_EditDataBound(object sender, EventArgs e)
    {
      base.FormView_EditDataBound(sender, e);
      RegisterPostbackTrigger(Form_View.FindControl("btnSave"));
      RegisterPostbackTrigger(Form_View.FindControl("btnCancel"));
      Form_View.FindControl("txt課程名稱").Focus();
    }

    protected override void GridView_DataSource_Selected(object sender, ObjectDataSourceStatusEventArgs e)
    {
      base.GridView_DataSource_Selected(sender, e);

      if (MultiView1.ActiveViewIndex == 1)
      {
        if (e.ReturnValue is 數位課程List list && list.Count > 0)
          ActivateTab(MultiView1, 1);
        else
          lbMessage.Text = "找不到合乎條件的資料";
      }
    }

    private bool 儲存上傳檔案(FileUpload fu, int 課程編號, out string fileName)
    {
      if (fu == null || !fu.HasFile)
      {
        fileName = "";
        return false;
      }
      fileName = String.Format("{0:000000}_{1}", 課程編號, fu.FileName);

      File.WriteAllBytes(docPath + "\\" + fileName, fu.FileBytes);
      return true;
    }

    private void 刪除上傳檔案(int 課程編號, bool del課程文件 = true, bool del評量文件 = true)
    {
      數位課程List d = Dao數位課程.SelectOne(課程編號);
      if (d.Count > 0)
      {
        if (del課程文件 && d[0].課程文件.Length > 0 && File.Exists(docPath + "\\" + d[0].課程文件))
          File.Delete(docPath + "\\" + d[0].課程文件);
        if (del評量文件 && d[0].評量文件.Length > 0 && File.Exists(docPath + "\\" + d[0].評量文件))
          File.Delete(docPath + "\\" + d[0].評量文件);
      }
    }

    protected override void FormView_ItemInserting(object sender, FormViewInsertEventArgs e)
    {
      base.FormView_ItemInserting(sender, e);
      //fu課程文件 = Form_View.FindControl("fu課程文件") as FileUpload;
      //fu評量文件 = Form_View.FindControl("fu評量文件") as FileUpload;
    }

    protected override void FormView_ItemUpdating(object sender, FormViewUpdateEventArgs e)
    {
      base.FormView_ItemUpdating(sender, e);
      //fu課程文件 = Form_View.FindControl("fu課程文件") as FileUpload;
      //fu評量文件 = Form_View.FindControl("fu評量文件") as FileUpload;
    }

    protected override void FormView_DataSource_Inserted(object sender, ObjectDataSourceStatusEventArgs e)
    {
      base.FormView_DataSource_Inserted(sender, e);
      int id = DAC.GetInt32(e.ReturnValue);

      // 處理上傳檔案
      /*
      數位課程List d = Dao數位課程.SelectOne(id);
      if (d.Count > 0)
      {
        string fileName1;
        string fileName2;

        if (儲存上傳檔案(fu課程文件, id, out fileName1))
        {
          d[0].課程文件 = fileName1;
        }
        if (儲存上傳檔案(fu評量文件, id, out fileName2))
        {
          d[0].評量文件 = fileName2;
        }
        Dao數位課程.UpdateOne(d[0]);
      }
       */ 
    }

    protected override void FormView_DataSource_Updating(object sender, ObjectDataSourceMethodEventArgs e)
    {
      base.FormView_DataSource_Updating(sender, e);
      數位課程 value = e.InputParameters[0] as 數位課程;

      /*
      string fileName1;
      string fileName2;

      // 刪除舊上傳檔案
      刪除上傳檔案(value.課程編號, fu課程文件.HasFile, fu評量文件.HasFile);

      // 儲存新上傳檔案
      if (儲存上傳檔案(fu課程文件, value.課程編號, out fileName1))
      {
        value.課程文件 = fileName1;
      }

      if (儲存上傳檔案(fu評量文件, value.課程編號, out fileName2))
      {
        value.評量文件 = fileName2;
      }
       */ 
    }

    protected override void FormView_DataSource_Deleting(object sender, ObjectDataSourceMethodEventArgs e)
    {
      base.FormView_DataSource_Deleting(sender, e);

      // 刪除上傳檔案
      數位課程 value = e.InputParameters[0] as 數位課程;
      刪除上傳檔案(value.課程編號);
    }

    protected void btnClear_Click(object sender, EventArgs e)
    {
      txt講師_Search.Text = "";
      txt課程名稱_Search.Text = "";
      txt課程簡介_Search.Text = "";
    }

    protected void FormView1_ItemCommand(object sender, FormViewCommandEventArgs e)
    {
      if (e.CommandName == "刪除文件1" || e.CommandName == "刪除文件2")
      {
        數位課程List d = Dao數位課程.SelectOne(DAC.GetInt32(Form_View.SelectedValue));
        if (d.Count > 0)
        {
          string fileName;

          if (e.CommandName == "刪除文件1" && d[0].課程文件.Length > 0)
          {
            fileName = String.Format("{0}\\{1}", docPath, d[0].課程文件);
            if (File.Exists(fileName))
            {
              File.Delete(fileName);
              d[0].課程文件 = "";
            }
          }
          else if (e.CommandName == "刪除文件2" && d[0].評量文件.Length > 0)
          {
            fileName = String.Format("{0}\\{1}", docPath, d[0].評量文件);
            if (File.Exists(fileName))
            {
              File.Delete(fileName);
              d[0].評量文件 = "";
            }
          }
          else
            return;

          Dao數位課程.UpdateOne(d[0]);
          Form_View.DataBind();
        }
      }

      if (e.CommandName == "上傳文件1")
      {
        FileUpload fu = FindControl<FileUpload>(Form_View, "fu課程文件");
        int id = DAC.GetInt32(Form_View.SelectedValue);
        
        數位課程List d = Dao數位課程.SelectOne(id);
        if (d.Count > 0 && fu.HasFile)
        {
          刪除上傳檔案(id, true, false);

          string fileName;
          if (儲存上傳檔案(fu, id, out fileName))
          {
            d[0].課程文件 = fileName;
            Dao數位課程.UpdateOne(d[0]);
            Form_View.DataBind();
          }
        }
      }

      if (e.CommandName == "上傳文件2")
      {
        FileUpload fu = FindControl<FileUpload>(Form_View, "fu評量文件");
        int id = DAC.GetInt32(Form_View.SelectedValue);

        數位課程List d = Dao數位課程.SelectOne(id);
        if (d.Count > 0 && fu.HasFile)
        {
          刪除上傳檔案(id, false, true);

          string fileName;
          if (儲存上傳檔案(fu, id, out fileName))
          {
            d[0].評量文件 = fileName;
            Dao數位課程.UpdateOne(d[0]);
            Form_View.DataBind();
          }
        }
      }
    }

    protected void ds課程_ObjectCreating(object sender, ObjectDataSourceEventArgs e)
    {
      e.ObjectInstance = Dao課程;
    }

    protected void gv課程挑選_RowCommand(object sender, GridViewCommandEventArgs e)
    {
      if (e.CommandName == "Select")
      {
        // 挑選此課程，把課程相關資料抓出來填入底下
        課程List d = Dao課程.SelectOne(e.CommandArgument.ToString());
        if (d.Count > 0)
        {
          FindControl<DropDownList>(Form_View, "dd課程類別").SelectedValue = d[0].課程類別;
          FindControl<TextBox>(Form_View, "txt課程名稱").Text = d[0].課程名稱;
          FindControl<TextBox>(Form_View, "txt課程簡介").Text = d[0].課程內容;
        }
      }
    }

    protected void btnSelect課程_Click(object sender, EventArgs e)
    {
      //DropDownList ddl課程類別Search = Form_View.FindControl("ddl課程類別Search") as DropDownList;
      //Label lbMessage課程內容 = Form_View.FindControl("lbMessage課程內容") as Label;
      //GridView gv課程挑選 = Form_View.FindControl("gv課程挑選") as GridView;
      if (ddl課程類別Search.SelectedValue == null || ddl課程類別Search.SelectedValue.Length == 0)
      {
        lbMessage課程內容.Text = "請選擇一個課程類別再查詢";
        return;
      }

      gv課程挑選.DataBind();

      if (gv課程挑選.Rows.Count == 0)
        lbMessage課程內容.Text = "找不到合乎條件的課程";
    }

    protected override void FormView_ModeChanged(object sender, EventArgs e)
    {
      base.FormView_ModeChanged(sender, e);

      pnl挑選課程.Visible = Form_View.CurrentMode == FormViewMode.Insert;
      if (pnl挑選課程.Visible)
        gv課程挑選.DataBind();
    }
  }
}