{pkgs, ...}:

let
  # Import the inquisitor package
  inquisitorSource = fetchFromGitHub {
    owner = "Jaculabilis";
    repo = "Inquisitor";
    rev = "9001bd8f920cc120f38e998d63a8134969a00032";
    sha256 = "0nx1dszvmn6a86jhj3c9607jqy0bmijjjz3jb3v5lsnpwwkjs5w6";
  };
  inquisitor = callPackage inquisitorSource {};

  # Create the inquisitor config file in the nix store
  inquisitorConfig = pkgs.writeTextFile "inquisitor.conf" ''
    DataPath = /var/lib/inquisitor/data/
    SourcePath = /var/lib/inquisitor/sources/
    CachePath = /var/lib/inquisitor/cache/
    Verbose = false
    LogFile = /var/log/inquisitor.log
  '';
in
{
  # Create a user for the service
  users.users.inquisitor = {
    description = "Inquisitor service user";
    isSystemUser = true;
    packages = [ inquisitor ];
  };

  # TODO replace with wrapper that sets envvar
  environment.systemPackages = [ inquisitor ];

  # Set up the inquisitor service
  systemd.services.inquisitor =
  let
    # Inquisitor needs some state set up to work properly
    inquisitorSetup = pkgs.writeShellScriptBin "setup.sh" ''
      mkdir -p /var/lib/inquisitor/data/inquisitor/
      mkdir -p /var/lib/inquisitor/sources/
      mkdir -p /var/lib/inquisitor/cache/
      echo "{}" > /var/lib/inquisitor/data/inquisitor/state
    '';
    # Set up server invocation
    #inquisitorRun = pkgs.writeShellScriptBin "run.sh" ''
    #  ${pkgs.gunicorn}/bin/gunicorn
    #''; TODO
    inquisitorRun = pkgs.writeShellScriptBin "run.sh" ''
      ${inquisitor}/bin/inquisitor run
    '';
  in {
    description = "Inquisitor server";
    environment = { INQUISITOR_CONFIG = $"{inquisitorConfig}"; }; # TODO gunicorn -e
    preStart = "${inquisitorSetup}/bin/setup.sh";
    script = $"${inquisitorRun}/bin/run.sh";
    serviceConfig = {
      User = "inquisitor";
      Type = "simple";
      WorkingDirectory = "/var/lib/inquisitor/";
    };
    wantedBy = [ "multi-user.target" ];
    after = [ "network.target" ];
    enable = true;
  };
}