using System;
using System.Collections.Generic;
using System.Data;
using System.Configuration;
using System.Web.Configuration;
using System.Web.UI.WebControls;

using PizzaModel;
using PizzaService;
using PizzaSystem;


namespace PizzaPresentation
{
    public partial class OrderForm : System.Web.UI.Page
    {
        private StudentService studentService;
        private int roomNumber;

        protected void Page_Load(object sender, EventArgs e)
        {
            // if room not there or service API not there, redirect to start page
            PizzaConfig pizzaSystem = (PizzaConfig)Application["PizzaSys"];
            String roomNumberStr = (String)Session["room"];

            if (pizzaSystem == null || roomNumberStr == null)
            {
                Response.Redirect("StudentStart.aspx", false);
                return;
            }

            studentService = pizzaSystem.StudentService;
            roomNumber = int.Parse(roomNumberStr);

            //  page load on GET: set up pizza sizes, toppings lists
            if (!IsPostBack)
            {
                List<PizzaSize> allSizes = studentService.AllPizzaSizes();
                RadioButtonList1.DataSource = allSizes;
                RadioButtonList1.DataTextField = "SizeName";
                RadioButtonList1.DataValueField = "ID";
                RadioButtonList1.DataBind();
                ToppingsCheckBoxList.DataSource = studentService.AllToppings();
                ToppingsCheckBoxList.DataTextField = "ToppingName";
                ToppingsCheckBoxList.DataValueField = "ID";
                ToppingsCheckBoxList.DataBind();
            }
        }
  
        // This event happens even if autopostback is not turned on
        // it just happens when the form is submitted in that case
        // but we don't need to use it, since all the info is avail 
        // to the submit event handler
        protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // can look at these here, or at submit, more conveniently
            //String buttonText = RadioButtonList1.SelectedItem.Text;
            //sizeID = RadioButtonList1.SelectedItem.Value;       
        }
        protected void ToppingsCheckBoxList_SelectedIndexChanged(object sender, EventArgs e)
        {
            //String boxText = ToppingsCheckBoxList.SelectedItem.Text;
            //String toppingID = ToppingsCheckBoxList.SelectedItem.Value;
        }

        public void SubmitButton_OnClick(object sender, EventArgs e)
        {
            String sizeID = null;
            // get all the user input from the various controls
            if (RadioButtonList1.SelectedItem != null)
                sizeID = RadioButtonList1.SelectedItem.Value;
            else
            {
                OrderResultLabel.Text = "Please choose a size";
                return;  // give user another chance to input a size
            }
            List<String> toppingIDs = new List<String>();
            // find selected checkbox items, add those topping ids to list
            foreach (ListItem i in ToppingsCheckBoxList.Items)
            {
                if (i.Selected)
                    toppingIDs.Add(i.Value);
            }
            try
            {
                int orderID = studentService.MakeOrder(roomNumber, sizeID, toppingIDs);
                Session["orderID"] = orderID;  // remember orderID for thank you page
                // redirect to that page. (Alternatively, absorb that page in this one.)
                Response.Redirect("OrderThankYou.aspx", false);
            }
            catch (ApplicationException e1)
            {
                OrderResultLabel.Text = "order failed: " + e1.Message;
            }

        }
    }
}