using Microsoft.AspNetCore.Components.Forms;

using NLog;

namespace MesaFabApproval.API.Utilities;

public class FileUtilities {
    private static readonly Logger _logger = NLog.LogManager.GetCurrentClassLogger();

    public static async Task SaveFileToFileSystem(IFormFile file, string path) {
        try {
            _logger.Info($"Attempting to save file to file system");

            if (file is null) throw new ArgumentNullException("File cannot be null");
            if (string.IsNullOrWhiteSpace(path)) throw new ArgumentException("Path cannot be null or empty");

            if (File.Exists(path)) throw new Exception($"A file already exists with name {file.FileName}");

            string? directoryPath = Path.GetDirectoryName(path);
            if (!string.IsNullOrWhiteSpace(directoryPath))
                Directory.CreateDirectory(directoryPath);

            using (Stream stream = File.Create(path)) {
                await file.CopyToAsync(stream);
            }
        } catch (Exception ex) {
            _logger.Error($"Unable to save file to file system, because {ex.Message}");
            throw;
        }
    }
}