{ lib, stdenv, fetchFromGitHub, fetchpatch, shared-mime-info
, autoconf, automake, intltool, libtool, pkg-config, cmake
, ruby, librsvg
, ncurses, m17n_lib, m17n_db, expat
, withAnthy ? true, anthy ? null
, withGtk ? true
, withGtk2 ? withGtk, gtk2 ? null
, withGtk3 ? withGtk, gtk3 ? null
# Was never enabled in the history of this package and is not needed by any
# dependent package, hence disabled to save up closure size.
, withQt ? false
, withQt5 ? withQt, qt5 ? null
, withLibnotify ? true, libnotify ? null
, withSqlite ? true, sqlite ? null
, withNetworking ? true, curl ? null, openssl ? null
, withFFI ? true, libffi ? null

# Things that are clearly an overkill to be enabled by default
, withMisc ? false, libeb ? null
}:

assert withGtk2 -> gtk2 != null;
assert withGtk3 -> gtk3 != null;

assert withAnthy -> anthy != null;
assert withLibnotify -> libnotify != null;
assert withSqlite -> sqlite != null;
assert withNetworking -> curl != null && openssl != null;
assert withFFI -> libffi != null;
assert withMisc -> libeb != null;

stdenv.mkDerivation rec {
  version = "1.8.8";
  pname = "uim";

  src = fetchFromGitHub {
    owner = "uim";
    repo = "uim";
    rev = "2c0958c9c505a87e70e344c2192e2e5123c71ea5";
    fetchSubmodules = true;
    sha256 = "1hkjxi5r49gcna37m3jvykny5hz9ram4y8a3q7lw4qzr52mz9pdp";
  };

  nativeBuildInputs = [
    autoconf automake intltool libtool pkg-config cmake

    ruby # used by sigscheme build to generate function tables
    librsvg # used by uim build to generate png pixmaps from svg
  ] ++ lib.optionals withQt5 [
    qt5.wrapQtAppsHook
  ];

  buildInputs = [
    ncurses m17n_lib m17n_db expat
  ]
  ++ lib.optional withAnthy anthy
  ++ lib.optional withGtk2 gtk2
  ++ lib.optional withGtk3 gtk3
  ++ lib.optionals withQt5 [ qt5.qtbase qt5.qtx11extras ]
  ++ lib.optional withLibnotify libnotify
  ++ lib.optional withSqlite sqlite
  ++ lib.optionals withNetworking [
    curl openssl
  ]
  ++ lib.optional withFFI libffi
  ++ lib.optional withMisc libeb;

  prePatch = ''
    patchShebangs *.sh */*.sh */*/*.sh

    # configure sigscheme in maintainer mode or else some function tables won't get autogenerated
    substituteInPlace configure.ac \
      --replace "--with-master-pkg=uim --enable-conf=uim" \
                "--enable-maintainer-mode --with-master-pkg=uim --enable-conf=uim"

    # generate ./configure files
    (cd sigscheme/libgcroots; ./autogen.sh)
    (cd sigscheme; ./autogen.sh)
    ./autogen.sh
  '';

  patches = [
    ./data-hook.patch

    # Pull upstream fix for -fno-common toolchains
    #   https://github.com/uim/libgcroots/pull/4
    (fetchpatch {
      name = "libgcroots-fno-common.patch";
      url = "https://github.com/uim/libgcroots/commit/7e39241344ad0663409e836560ae6b5eb231e1fc.patch";
      sha256 = "0iifcl5lk8bvl0cflm47gkymg88aiwzj0gxh2aj3mqlyhvyx78nz";
      # Patch comes from git submodule. Relocate as:
      # a/include/private/gc_priv.h -> a/sigscheme/libgcroots/include/private/gc_priv.h
      stripLen = 1;
      extraPrefix = "sigscheme/libgcroots/";
    })
  ];

  configureFlags = [
    # configure in maintainer mode or else some pixmaps won't get autogenerated
    # this should imply the above `--enable-maintainer-mode`, but it does not
    "--enable-maintainer-mode"

    "--enable-pref"
    "--with-skk"
    "--with-x"
    "--with-xft"
    "--with-expat=${expat.dev}"
  ]
  ++ lib.optional withAnthy "--with-anthy-utf8"
  ++ lib.optional withGtk2 "--with-gtk2"
  ++ lib.optional withGtk3 "--with-gtk3"
  ++ lib.optionals withQt5 [
    "--with-qt5"
    "--with-qt5-immodule"
  ]
  ++ lib.optional withLibnotify "--enable-notify=libnotify"
  ++ lib.optional withSqlite "--with-sqlite3"
  ++ lib.optionals withNetworking [
    "--with-curl"
    "--with-openssl-dir=${openssl.dev}"
  ]
  ++ lib.optional withFFI "--with-ffi"
  ++ lib.optional withMisc "--with-eb";

  # TODO: things in `./configure --help`, but not in nixpkgs
  #--with-canna            Use Canna [default=no]
  #--with-wnn              Build with libwnn [default=no]
  #--with-mana             Build a plugin for Mana [default=yes]
  #--with-prime            Build a plugin for PRIME [default=yes]
  #--with-sj3              Use SJ3 [default=no]
  #--with-osx-dcs          Build with OS X Dictionary Services [default=no]

  # TODO: fix this in librsvg/glib later
  # https://github.com/NixOS/nixpkgs/pull/57027#issuecomment-475461733
  preBuild = ''
    export XDG_DATA_DIRS="${shared-mime-info}/share"
  '';

  dontUseCmakeConfigure = true;

  meta = with lib; {
    homepage    = src.meta.homepage;
    description = "A multilingual input method framework";
    license     = licenses.bsd3;
    platforms   = platforms.unix;
    maintainers = with maintainers; [ ericsagnes oxij ];
  };
}