namespace lab6_5_CalebFontenot
{
    public partial class Form1 : Form
    {
        // Constant field for the contribution rate
        private const decimal CONTRIB_RATE = 0.05m;

        public Form1()
        {
            InitializeComponent();
        }

        private void exitButton_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        /* 
         * The InputIsValid method converts the user input and stores it in the arguements (passed by refference). If the conversion is successful, the method returns true. Otherwize it returns false.
        */
        private bool InputIsValid(ref decimal pay, ref decimal bonus)
        {
            // Flag variable to indicate whether the input is good
            bool inputGood = false;

            // Try to convert both inputs to decimal.
            if (decimal.TryParse(bonusTextBox.Text, out pay))
            {
                if (decimal.TryParse(bonusTextBox.Text, out bonus))
                {
                    // Both inputs are good.
                    inputGood = true;
                }
                else
                {
                    // Display an error message for the bonus.
                    MessageBox.Show("Bonus amount is invalid.");
                }
            }
            else
            {
                //Display an error message for gross pay.
                MessageBox.Show("Gross pay is invalid.");

            }
            //Return the result.
            return inputGood;
        }
        private void calculateButton_Click(object sender, EventArgs e)
        {
            // Cariables for gross pay, bonus, and contributions
            decimal grossPay = 0m, bonus = 0m, contributions = 0m;
            if (InputIsValid(ref grossPay, ref bonus))
            {
                // Calculate the amount of contribution.
                contributions = (grossPay + bonus) * CONTRIB_RATE;

                // Display the contribution.
                contributionTextBox.Text = contributions.ToString("c");
            }
        }
    }
}