export function joinurl(...segments) {
  let url = segments[0];
  for (const segment of segments.slice(1)) {
    if (url.endsWith("/") && segment.startsWith("/")) {
      url = url.slice(0, -1) + segment;
    } else if (!url.endsWith("/") && !segment.startsWith("/")) {
      url = url + "/" + segment;
    } else {
      url = url + segment;
    }
  }
  return url;
}

export function extname(filename) {
  if (!filename.includes(".")) {
    return "";
  }
  return "." + filename.split(".").pop();
}

export function getContentTypeForFilename(filename) {
  const extension = extname(filename).toLowerCase();
  return getContentTypeForExtension(extension);
}

export function getContentTypeForExtension(extension, fallback = "text/plain") {
  switch (extension) {
    case ".html":
      return "text/html";
    case ".css":
      return "text/css";
    case ".js":
      return "application/javascript";
    case ".json":
      return "application/json";
    case ".svg":
      return "image/svg+xml";
    case ".png":
      return "image/png";
    case ".jpg":
      return "image/jpeg";
    case ".gif":
      return "image/gif";
    case ".webp":
      return "image/webp";
    case ".ico":
      return "image/x-icon";
    case ".txt":
      return "text/plain";
    case ".md":
      return "text/markdown";
    case ".xml":
      return "application/xml";
    case ".pdf":
      return "application/pdf";
    case ".zip":
      return "application/zip";
    case ".7z":
      return "application/x-7z-compressed";
    case ".tar":
      return "application/x-tar";
    case ".gz":
      return "application/gzip";
    case ".bz2":
      return "application/x-bzip2";
    case ".mp3":
      return "audio/mpeg";
    case ".mp4":
      return "video/mp4";
    case ".webm":
      return "video/webm";
    case ".ogg":
      return "audio/ogg";
    case ".wav":
      return "audio/wav";
    case ".flac":
      return "audio/flac";
    case ".aac":
      return "audio/aac";
    case ".m4a":
      return "audio/mp4";
    case ".m4v":
      return "video/mp4";
  }
  return fallback;
}

export function trimLeadingSlash(path) {
  if (path.startsWith("/")) {
    return path.slice(1);
  }
  return path;
}