using Microsoft.Extensions.DependencyInjection;

namespace NfProcessorApp.Handlers
{
    public class FileHandlerFactory(IServiceProvider provider) : IFileHandlerFactory
    {
        private readonly IServiceProvider _provider = provider;

        public IFileHandler CreateHandler(string filePath)
        {
            var ext = Path.GetExtension(filePath).ToLowerInvariant();
            return ext switch
            {
                ".xml" => _provider.GetRequiredService<XmlFileHandler>(),
                ".pdf" => _provider.GetRequiredService<PdfFileHandler>(),
                _ => throw new NotSupportedException($"Extension not supported: {ext}")
            };
        }
    }
}