using System;
using PizzaSystem;
using PizzaService;
using PizzaModel;


namespace PizzaPresentation
{
    public partial class AdminChangeOptions : System.Web.UI.Page
    {
        private StudentService studentService;
        private AdminService adminService;

        protected void Page_Load(object sender, EventArgs e)
        {
            // check if app has yet run, set up service API
            if (Application["PizzaSys"] == null)
            {
                PizzaConfig pizzaService = new PizzaConfig();
                Application["PizzaSys"] = pizzaService;
            }
            PizzaConfig pizzaSystem = (PizzaConfig)Application["PizzaSys"];
            studentService = pizzaSystem.StudentService;
            adminService = pizzaSystem.AdminService;
            if (!IsPostBack)
            {
                // page load on GET: show current toppings and sizes
                ToppingsGridView.DataSource = studentService.AllToppings();
                ToppingsGridView.DataBind();
                PizzaSizeGridView.DataSource = studentService.AllPizzaSizes();
                PizzaSizeGridView.DataBind();
            }

            DeleteToppingResultLabel.Text = "";
            AddToppingResultLabel.Text = "";
            DeleteSizeResultLabel.Text = "";
            AddSizeResultLabel.Text = "";
        }

        protected void ToppingsGridView_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        protected void DeleteToppingButton_OnClick(object sender, EventArgs e)
        {
            try
            {
                int index = ToppingsGridView.SelectedIndex;
                if (index < 0)
                {
                    DeleteToppingResultLabel.Text = "Nothing selected";
                    return;
                }

                String toppingID = (String)ToppingsGridView.SelectedRow.Cells[1].Text;
                adminService.DeleteTopping(toppingID);
                DeleteToppingResultLabel.Text = "Success";
                ToppingsGridView.SelectedIndex = -1;  // unselect row 
                // redo grid
                ToppingsGridView.DataSource = studentService.AllToppings();
                ToppingsGridView.DataBind();
            }
            catch (ApplicationException e1)
            {
                DeleteToppingResultLabel.Text = e1.Message;
            }
        }


        protected void PizzaSizeGridView_SelectedIndexChanged(object sender, EventArgs e)
        {

        }
        // This event is fired in postback handling of user button-click
        // or (spuriously) if the browser sends a postback when the
        // user does a CR in a textbox.  To prevent this, mark the
        // textboxes with "auto-postback" to get some Javascript 
        // written to cause the textbox itself to do the postback.
        protected void DeleteSizeButton_OnClick(object sender, EventArgs e)
        {
            try
            {
                int index = PizzaSizeGridView.SelectedIndex;
                if (index < 0)
                {
                    DeleteSizeResultLabel.Text = "Nothing selected";
                    return;
                }

                String sizeID = (String)PizzaSizeGridView.SelectedRow.Cells[1].Text;
                adminService.DeletePizzaSize(sizeID);
                DeleteSizeResultLabel.Text = "Success";
                PizzaSizeGridView.SelectedIndex = -1;  // unselect row 
                // redo grid
                PizzaSizeGridView.DataSource = studentService.AllPizzaSizes();
                PizzaSizeGridView.DataBind();
            }
            catch (ApplicationException e1)
            {
                DeleteSizeResultLabel.Text = e1.Message;
            }
        }
        // This event fires on the postback following any user entry in 
        // textbox, regardless of how the postback itself is caused,
        // i.e., by <CR> in text box or add-topping button click.
        // So this is a good spot to do the needed insert
        protected void AddSizeTextBox_TextChanged(object sender, EventArgs e)
        {
            try
            {
                String newName = AddSizeTextBox.Text;
                adminService.AddPizzaSize(newName);
                AddSizeTextBox.Text = "";
                AddSizeResultLabel.Text = "Success";
                PizzaSizeGridView.SelectedIndex = -1;  // unselect row 
                // redo grid
                PizzaSizeGridView.DataSource = studentService.AllPizzaSizes();
                PizzaSizeGridView.DataBind();
            }
            catch (ApplicationException e1)
            {
                AddSizeResultLabel.Text = e1.Message;
            }
        }

        protected void AddToppingTextBox_TextChanged(object sender, EventArgs e)
        {
            try
            {
                String newName = AddToppingTextBox.Text;
                adminService.AddTopping(newName);
                AddToppingTextBox.Text = "";
                AddToppingResultLabel.Text = "Success";
                ToppingsGridView.SelectedIndex = -1;  // unselect row 
                // redo grid
                ToppingsGridView.DataSource = studentService.AllToppings();
                ToppingsGridView.DataBind();
            }
            catch (ApplicationException e1)
            {
                AddToppingResultLabel.Text = e1.Message;
            }
        }

        protected void AddToppingButton_OnClick(object sender, EventArgs e)
        {
        }

        protected void AddSizeButton_OnClick(object sender, EventArgs e)
        {

        }
        protected void ChangesDoneButton_OnClick(object sender, EventArgs e)
        {
            Response.Redirect("AdminMenu.aspx", false);
        }
    }
}