namespace Phonebook.Utils;

public class ImageHelper
{
    public static ImageSource Base64ToStreamImageSource(string base64String)
    {
        if (string.IsNullOrWhiteSpace(base64String))
            return null;

        // Remove data URI prefix if present (e.g., "data:image/png;base64,")
        string cleanBase64 = base64String.Contains(',') 
            ? base64String.Substring(base64String.IndexOf(',') + 1) 
            : base64String;

        byte[] imageBytes;
        try
        {
            imageBytes = Convert.FromBase64String(cleanBase64);
        }
        catch (FormatException)
        {
            // Invalid Base64 string
            return null;
        }

        // MAUI calls this delegate each time the image is rendered.
        // Always return a NEW stream; MAUI will dispose it after loading.
        return ImageSource.FromStream(() => new MemoryStream(imageBytes));
    }
}