default.nix

with import <nixpkgs> {}; # FIXME: pin the revision
let

  # there is no stable or content adressable URL for this file :(
  url = https://riotgamespatcher-a.akamaihd.net/releases/live/installer/deploy/League%20of%20Legends%20installer%20NA.exe;

  registry = pkgs.writeText "registry.reg" ''
    REGEDIT4

    [HKEY_CURRENT_USER\Software\Wine\X11 Driver]
    GrabFullScreen = "Y"
    [HKEY_CURRENT_USER\Software\Wine\DirectInput]
    MouseWrapOverride = "enable"
    [HKEY_CURRENT_USER\Software\Wine\Direct3D]
    UseGLSL = "disabled"
  '';

  settings = pkgs.writeText "settings.yaml" ''
    install:
       globals:
         locale: "en_US"
         region: "EUW"
  '';

  download = pkgs.writeScriptBin "download" ''
    ${pkgs.curl}/bin/curl -o installer.exe ${url}
  '';

  install = pkgs.writeScriptBin "install" ''
    ${init}
    test -e installer.exe || download
    wine installer.exe
  '';
  launch = pkgs.writeScriptBin "launch" ''
    ${init}
    wine "''${GAMEPATH}/LeagueClient.exe"
  '';

  init = pkgs.writeScriptBin "init" ''
    winetricks winxp
    wineserver -k
    regedit /S ${registry}
    wineserver -k
    export SETTINGS_FILE="''${GAMEPATH}Config/LeagueClientSettings.yaml"
    test -e $SETTINGS_FILE || cp ${settings} "$SETTINGS_FILE"
  '';

in {
  shell = runCommand "run" {
    nativeBuildInputs = [ wine-staging winetricks curl download launch init ];
    preferLocalBuild = true;
    shellHook = ''
        set -ex
        export WINEPREFIX=$(pwd)/wine
        export GAMEPATH="$WINEPREFIX/drive_c/Riot Games/League of Legends/"
        export WINEDLLOVERRIDES="msvcp140=n"
        mkdir -p $WINEPREFIX

        echo "run >install< to install the game."
        echo "run >download< to download the installer."
        echo "run >launch< to launch the games launcher."
    '';
  } "";
}