using System;
using System.Web;  //Need this for our HTTPCookie class
using System.Web.Security; // Very important namespace for this app. Don't forget it.

namespace ASPAuthors.aspnetbyexample.ch10
{
    public class Chapter10LoginCS : System.Web.UI.Page
    {
        // Our code behind page will inherit the System's Page object and the;px 
        // page which presents our data will inherit the event handlers in this file

        // We will capture the events that occur within our;px page and, well, handle them.
        protected System.Web.UI.WebControls.TextBox txtName; 
        protected System.Web.UI.WebControls.TextBox txtPass; 
        protected System.Web.UI.WebControls.Label lblMessage; 
        protected System.Web.UI.WebControls.TextBox txtCookie; 
        protected System.Web.UI.WebControls.RadioButton btnYes; 
        protected System.Web.UI.WebControls.RadioButton btnNo; 
        protected System.Web.UI.WebControls.Label lblCookie; 
        protected System.Web.UI.WebControls.Label lblSessionID; 
        protected System.Web.UI.WebControls.Label lblCookie2; 
        protected System.Web.UI.WebControls.TextBox txtCookie2; 
        protected System.Web.UI.WebControls.Button cmdLogin; 

        private void Page_Init(object sender, EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
        }

        #region Web Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);
        }
        #endregion


        private void Page_Load(Object sender, EventArgs e)
        {
            lblSessionID.Text = "Your Session ID is " + Session.SessionID;

            System.Web.HttpCookie objCookie;  // By importing the System.Web namespace you can create an instance of the HTTPCookie Class
            objCookie = Request.Cookies["Chapter10"];
            if(objCookie != null)
            {//If the value is not null then we can set them accordingly
                lblMessage.ForeColor = System.Drawing.Color.Black;
                lblMessage.Text = "Welcome back, I recognized you by your childish cookie! Please login to view Chapter10 online.";
            }
            else if(Session["YourName"] == "")
            {
                // We're checking the Session Object data to see if that variable it contains any string data.
                // If it it is empty it's pretty safe to;sume they haven't tried to login yet. I know, it's an ugly little hack.
                // I don't even need HTML right now! I just plopped a textbox object on the page.
                lblMessage.ForeColor = System.Drawing.Color.Black;
                lblMessage.Text = "Welcome, please login to view Chapter10 online.";
            }
            else
            {
                // Ok, something's strange here! They have a string data in their Session("YourName") variable. They must have been 
                // sent back to us by the login page
                lblMessage.ForeColor = System.Drawing.Color.Black;
                lblMessage.Text = "Unauthorized Access: I'm sorry " + 
                    Session["YourName"] + 
                    ", please check your username and password and try again.";
            }                    
        }

        private void cmdLogin_Click(Object sender, EventArgs e)
        {
            if(txtName.Text.Length <= 0)
            {
                lblMessage.ForeColor = System.Drawing.Color.Red;
                lblMessage.Text = "Please enter a username.";
                return;
            }
            if(txtPass.Text.Length <= 0)
            {
                lblMessage.ForeColor = System.Drawing.Color.Red;
                lblMessage.Text = "Please enter a password.";
                return;
            }

            if(btnYes.Checked)
            {
                Response.Cookies["Chapter10"]["Childish"] = txtCookie.Text;
                Response.Cookies["Chapter10"]["Mature"] = txtCookie2.Text;
                Response.Cookies["Chapter10"].Expires = System.DateTime.Parse("3/3/2039");
            }

            if(FormsAuthentication.Authenticate(txtName.Text, txtPass.Text))
            {
                // Excellent, they are authorized and authenticated
                Session["YourName"] = txtName.Text;
                // Send them to the a Chapter10text page
                Response.Redirect("Chapter10Text.aspx?Name=" + txtName.Text);
            }
            else
            {
                // Ok, at least we have their name and can create a more personalized message.
                lblMessage.ForeColor = System.Drawing.Color.Black;
                lblMessage.Text = "Unauthorized Access: I'm sorry " + Session["YourName"] + 
                    ", please check your username and password and try again.";
            }
        }

        // NOTE: By;signing both of these radio buttons a shared group name .NET treat them like a control array
        private void btnYes_CheckedChanged(Object sender, EventArgs e)
        {
            // As  soon as they select one of my annoying required radio buttons, I enable the login button
            // This is not exactly an ideal example of what we can do using postback features, but
            // it should at least spark some good ideas.
            cmdLogin.Enabled = false;
            lblCookie.Visible = true;
            txtCookie.Visible = true;
            lblCookie2.Visible = true;
            txtCookie2.Visible = true;
        }

        private void btnNo_CheckedChanged(Object sender, EventArgs e)
        {
            // I'll use this event to enable the login button. It's default "enabled" 
            // property is set to false
            cmdLogin.Enabled = true;
            lblCookie.Visible = false;
            txtCookie.Visible = false;
            lblCookie2.Visible = false;
            txtCookie2.Visible = false;
        }

        private void txtCookie_TextChanged(Object sender, EventArgs e)
        {
            cmdLogin.Enabled = true;
        }
    }
}