using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Text;

namespace WebShop
{
	/// <summary>
	/// UserManager 的摘要說明。
	/// </summary>
	public class UserManager : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label lblInfo;
		protected System.Web.UI.WebControls.DataGrid Dglist;
		protected System.Web.UI.WebControls.DataGrid dg_UserList;
		public int RowNo = 0;

		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!IsPostBack)
			{
				try
				{
					if((Session["UserName"].ToString()!="") && DataAccessLayer.User.IsSupervisor(Session["UserName"].ToString()))
					{
						Bind();															
					}
				}
				catch
				{
					Response.Redirect("Error.aspx");
				}		
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN：該調用是 ASP.NET Web 窗體設計器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 設計器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Dglist_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
		{
			++RowNo;
		}

		private void Bind()
		{
			DataSet ds = DataAccessLayer.User.GetUsers();
			Label1.Text = "Total user count:" + ds.Tables[0].Rows.Count.ToString();
			this.Dglist.DataSource = ds.Tables[0].DefaultView;
			this.Dglist.DataBind();
		}

		private void Dglist_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			Dglist.CurrentPageIndex = e.NewPageIndex;
			RowNo += Dglist.PageSize * Dglist.CurrentPageIndex;
			Bind();	
		}

		private void btnDelete_Click()
		{	
			CheckBox cb = new CheckBox();
			StringBuilder sb = new StringBuilder();

			int i,j = Dglist.Items.Count;
			for(i=0;i<j;i++)
			{
				cb = (CheckBox)Dglist.Items[i].Cells[0].FindControl("CheckBox1");
				if(cb.Checked)
				{
					sb.Append(Dglist.Items[i].Cells[3].Text.Trim());
					sb.Append("','");
				}
			}
			string strNames = sb.ToString();
			
			try
			{
				DataAccessLayer.User.DeleteGroup(strNames);
				lblInfo.Text = "Delete accomplished!";
				Response.Redirect("ManageUser.aspx");
			}
			catch
			{
				lblInfo.Text = "刪除失敗！";
			}
		}

		private void btnCheckAll_Click()
		{
			CheckBox cb = new CheckBox();

			int i,j = Dglist.Items.Count;
			for(i=0;i<j;i++)
			{
				cb = (CheckBox)Dglist.Items[i].Cells[0].FindControl("CheckBox1");
				cb.Checked = true;
			}		
		}

		private void Dglist_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			switch(e.CommandName)
			{
				case "CheckAll":
					btnCheckAll_Click();
					break;
				case "Delete":
					btnDelete_Click();
					break;
			}
		}
	}
}