using System.Globalization;

namespace MauiCalculator;

public partial class MainPage : ContentPage
{
    public MainPage() => InitializeComponent();

    private void OnCalculateClicked(object sender, EventArgs e)
    {
        if (!double.TryParse(FirstEntry.Text, NumberStyles.Float,
                             CultureInfo.CurrentCulture, out double a) ||
            !double.TryParse(SecondEntry.Text, NumberStyles.Float,
                             CultureInfo.CurrentCulture, out double b))
        {
            ResultLabel.Text = "Enter two valid numbers.";
            return;
        }

        string op = (sender as Button)?.CommandParameter?.ToString() ?? "";
        if (op == "/" && b == 0)
        {
            ResultLabel.Text = "Cannot divide by zero.";
            return;
        }

        double answer = op switch
        {
            "+" => a + b,
            "-" => a - b,
            "*" => a * b,
            "/" => a / b,
            _ => double.NaN
        };
        ResultLabel.Text = $"Result: {answer:0.##}";
    }
}