{ stdenv, fetchurl, pkgconfig
, curl

# Optional Dependencies
, openssl ? null, zlib ? null, libgcrypt ? null, gnutls ? null
}:

with stdenv;
let
  optOpenssl = shouldUsePkg openssl;
  optZlib = shouldUsePkg zlib;
  hasSpdy = optOpenssl != null && optZlib != null;

  optLibgcrypt = shouldUsePkg libgcrypt;
  optGnutls = shouldUsePkg gnutls;
  hasHttps = optLibgcrypt != null && optGnutls != null;
in
with stdenv.lib;
stdenv.mkDerivation rec {
  name = "libmicrohttpd-0.9.41";

  src = fetchurl {
    url = "mirror://gnu/libmicrohttpd/${name}.tar.gz";
    sha256 = "0z3s3aplgxj8cj947i4rxk9wzvg68b8hbn71fyipc7aagmivx64p";
  };

  nativeBuildInputs = [ pkgconfig ];
  buildInputs = optional doCheck curl
    ++ optionals hasSpdy [ optOpenssl optZlib ]
    ++ optionals hasHttps [ optLibgcrypt optGnutls ];

  configureFlags = [
    (mkWith   true                 "threads"       "posix")
    (mkEnable true                 "doc"           null)
    (mkEnable false                "examples"      null)
    (mkEnable true                 "epoll"         "auto")
    (mkEnable doCheck              "curl"          null)
    (mkEnable hasSpdy              "spdy"          null)
    (mkEnable true                 "messages"      null)
    (mkEnable true                 "postprocessor" null)
    (mkWith   hasHttps             "gnutls"        null)
    (mkEnable hasHttps             "https"         null)
    (mkEnable true                 "bauth"         null)
    (mkEnable true                 "dauth"         null)
  ];

  # Disabled because the tests can time-out.
  doCheck = false;

  meta = {
    description = "Embeddable HTTP server library";
    homepage = http://www.gnu.org/software/libmicrohttpd/;
    license = licenses.lgpl2Plus;
    platforms = platforms.all;
    maintainers = with maintainers; [ wkennington ];
  };
}