// Programmer: Janet Joy
// Add check boxes for pizza toppings dynamically.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace Pizza
{
    public partial class Form1 : Form
    {
        List<String> toppings = new List<String> { };
        List<Double> costs = new List<Double> { };
        List<CheckBox> chkToppings = new List<CheckBox> { };
        public Form1()
        {
            InitializeComponent();
          }

        private void Form1_Load(object sender, EventArgs e)
        {
            // Load the toppings from the file.
            String fileName = @"c:\mydata\pizzatoppings.txt";
            // Include using System.IO; to use File.Exists.
            if (File.Exists(fileName)) getToppings(fileName);
            else MessageBox.Show(fileName + " Not Found", "No toppings available", MessageBoxButtons.OK);
            // To do: Let the user select a file.
            // Add the click event for every control on the form.
            foreach (Control ctrl in this.Controls)
            {
                ctrl.Click += new EventHandler(Control_Click);
            }
            // Show cost at start for default size.
            CalculateCost();
        }

        private void getToppings(String filename)
        {
            // Read one line at a time Example: sausage,2.00
            String line;
            // Parts will have "sausage", "2.00" after spliting line.
            String[] parts;
            // "2.00" must be converted to double 2.00
            Double cost,total=0.0;
            // Starting position for first checkbox is beneath cost
            int y = lblCost.Location.Y + lblCost.Width + 10;
            System.IO.StreamReader file =new System.IO.StreamReader(filename);
            // Read the file  line by line. 
            while ((line = file.ReadLine()) != null)
            {
                // split the line on the comma: "sausage,2.00"  becomes parts[0]="sausage"; parts[1]=",2.00"; 
                parts = line.Split(',');
                // Add name to toppings.
                toppings.Add(parts[0]);
                // Get cost and add to list costs
                Double.TryParse(parts[1], out cost);
                costs.Add(cost);
                total += cost;
                // Create a new check box and add it to the form and list
                CheckBox chk = new CheckBox();
                chkToppings.Add(chk);
                chk.Text =parts[0] + " "+cost.ToString("$0.00");
                this.Controls.Add(chk);
                chk.Location = new System.Drawing.Point(20, y);
                chk.Click += new EventHandler(Control_Click);
                // Increment y so that the next check box is under this one.
                y += 30;
            }
            //this.Text = total.ToString("$0.00");
        }

        private void Control_Click(object sender, EventArgs e)
        {
            // This event handles the click event for every control on the form.
            CalculateCost();
        }
        private void CalculateCost()
        {
            Double cost = 0;
            // Get the base price for the size.
            if (radSmall.Checked) cost = 9.00;
            else if (radMedium.Checked) cost = 10.00;
            else cost = 12.00;
            // Extra cheese is $1.50.
            if (chkCheese.Checked) cost += 1.50;
           // Add the cost for each topping that is checked.
           for(int i=0;i<toppings.Count;i++)
            {
                if (chkToppings[i].Checked) cost += costs[i];
            }
           // Show the cost with a $ and 2 decimal places.
            lblCost.Text = cost.ToString("$0.00");
        }
     }
}