{ config, lib, pkgs, ... }:

with lib;
let
  mods = let
    modFromFile = { file, deps, ... }:
      let basename = baseNameOf file;
      in pkgs.stdenv.mkDerivation {
        name = basename;
        src = file;
        phases = [ "installPhase" ];
        installPhase = ''
          mkdir $out
          cp $src $out/${basename}
        '';
        inherit deps;
      };
    modzip = { filename, deps ? [ ], ... }:
      modFromFile {
        file = (../../../static/factorio + "/${filename}");
        inherit deps;
      };
  in rec {
    advanced-autonomous-industries =
      modzip { filename = "aai-industry_0.5.19.zip"; };
    alien-biomes = modzip { filename = "alien-biomes_0.6.7.zip"; };
    aircraft = modzip { filename = "Aircraft_1.8.4.zip"; };
    armored-biters = modzip { filename = "ArmouredBiters_1.1.6.zip"; };
    big-data-string = modzip { filename = "big-data-string_1.0.1.zip"; };
    bobs-enemies = modzip { filename = "bobenemies_1.1.5.zip"; };
    bottleneck = modzip { filename = "Bottleneck_0.11.7.zip"; };
    bullet-trails = modzip { filename = "bullet-trails_0.6.2.zip"; };
    even-distribution = modzip { filename = "even-distribution_1.0.10.zip"; };
    flib = modzip { filename = "flib_0.11.2.zip"; };
    flow-control = modzip { filename = "Flow Control_3.1.3.zip"; };
    fluid-must-flow = modzip { filename = "FluidMustFlow_1.3.1.zip"; };
    gdiw = modzip { filename = "GDIW_1.1.0.zip"; };
    hovercrafts = modzip { filename = "Hovercrafts_1.2.2.zip"; };
    industrial-revolution-2 =
      modzip { filename = "IndustrialRevolution_2.3.2.zip"; };
    krastorio2 = modzip {
      filename = "Krastorio2_1.3.6.zip";
      deps = [ krastorio2-assets flib ];
    };
    krastorio2-assets = modzip { filename = "Krastorio2Assets_1.2.0.zip"; };
    larger-lamps = modzip { filename = "DeadlockLargerLamp_1.5.0.zip"; };
    miniloader = modzip { filename = "miniloader_1.15.6.zip"; };
    planet-imaging-satellite =
      modzip { filename = "planetImagingSatellite_1.0.3.zip"; };
    rampant = modzip { filename = "Rampant_3.1.2.zip"; };
    recipe-book = modzip { filename = "RecipeBook_3.4.5.zip"; };
    space-exploration = modzip { filename = "space-exploration_0.6.89.zip"; };
    stackers = modzip { filename = "deadlock-beltboxes-loaders_2.4.2.zip"; };
    trees = modzip {
      filename = "Trees_4.5.1.zip";
      deps = [ big-data-string ];
    };
    vehicle-snap = modzip { filename = "VehicleSnap_1.18.4.zip"; };
  };

  worldGenSeed = 5298;

  mapGenSettings = {
    autoplace_controls = {
      coal = {
        size = 4;
        richness = "high";
      };
      copper-ore = {
        size = 10;
        richness = "high";
      };
      crude-oil = {
        size = 10;
        richness = "high";
      };
      iron-ore = {
        size = 10;
        richness = "high";
      };
      stone = {
        size = 4;
        richness = "high";
      };
      uranium-ore = {
        size = 4;
        richness = "high";
      };
    };
    seed = (toString worldGenSeed);
  };

  stateDirName = "citadel";

in {
  config = {
    services.factorio = {
      enable = true;

      # 'factorio' points to an old game
      inherit stateDirName;

      package = pkgs.factorio-headless-experimental.override {
        username = "fudoniten";
        token = lib.removeSuffix "\n" (readFile
          config.fudo.secrets.files.blobs."factorio-token-fudoniten.txt");
      };

      public = false;
      port = 34197;
      lan = true;
      game-name = "Fudo Factorio";
      description = "Fudo Factorio Server";
      admins = [ "fudoniten" "Arkayuu" ];
      openFirewall = true;
      autosave-interval = 30;
      loadLatestSave = true;
      mods = with mods; [
        alien-biomes
        # aircraft
        #armored-biters
        bottleneck
        bullet-trails
        fluid-must-flow
        #krastorio2
        # industrial-revolution-2
        larger-lamps
        stackers
        trees
      ];
    };

    fileSystems = {
      "/var/lib/private/${stateDirName}" = {
        device = "/state/services/factorio/${stateDirName}";
        options = [ "bind" ];
      };
    };

    systemd.services.factorio = let
      cfg = config.services.factorio;
      serverSettings = {
        name = cfg.game-name;
        description = cfg.description;
        visibility = {
          public = cfg.public;
          lan = cfg.lan;
        };
        username = cfg.username;
        password = cfg.password;
        token = cfg.token;
        game_password = cfg.game-password;
        require_user_verification = cfg.requireUserVerification;
        max_upload_in_kilobytes_per_second = 0;
        minimum_latency_in_ticks = 0;
        ignore_player_limit_for_returning_players = false;
        allow_commands = "admins-only";
        autosave_interval = cfg.autosave-interval;
        autosave_slots = 5;
        afk_autokick_interval = 0;
        auto_pause = true;
        only_admins_can_pause_the_game = false;
        autosave_only_on_server = true;
        non_blocking_saving = cfg.nonBlockingSaving;
      } // cfg.extraSettings;
    in {
      serviceConfig.ExecStart = mkForce (toString [
        "${cfg.package}/bin/factorio"
        "--config=${cfg.configFile}"
        "--port=${toString cfg.port}"
        "--bind=${toString cfg.bind}"
        (optionalString (!cfg.loadLatestSave)
          "--start-server=/var/lib/${cfg.stateDirName}/saves/${cfg.saveName}.zip")
        "--server-settings=${
          pkgs.writeText "factorio-server-settings.json" (builtins.toJSON
            (filterAttrsRecursive (n: v: v != null) serverSettings))
        }"
        (optionalString cfg.loadLatestSave "--start-server-load-latest")
        (optionalString (cfg.mods != [ ])
          "--mod-directory=${pkgs.factorio-utils.mkModDirDrv cfg.mods null}")
        (optionalString (cfg.admins != [ ]) "--server-adminlist=${
            pkgs.writeText "factorio-server-adminlist.json"
            (builtins.toJSON cfg.admins)
          }")
        "--map-gen-settings=${
          pkgs.writeText "factorio-map-gen-settings.json"
          (builtins.toJSON mapGenSettings)
        }"
      ]);
    };
  };
}