server-config/services/minecraft.nix

{
  pkgs,
  service_configs,
  lib,
  config,
  ...
}:
{
  imports = [
    (lib.serviceMountWithZpool "minecraft-server-${service_configs.minecraft.server_name}"
      service_configs.zpool_ssds
      [
        "${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}"
      ]
    )
  ];

  environment.systemPackages = [
    (pkgs.writeScriptBin "mc-console" ''
      #!/bin/sh
      ${pkgs.tmux}/bin/tmux -S /run/minecraft/${service_configs.minecraft.server_name}.sock attach
    '')
  ];

  nixpkgs.config.allowUnfreePredicate =
    pkg:
    builtins.elem (lib.getName pkg) [
      "minecraft-server"
    ];

  services.minecraft-servers = {
    enable = true;
    eula = true;
    dataDir = service_configs.minecraft.parent_dir;
    openFirewall = true;

    servers.${service_configs.minecraft.server_name} = {
      enable = true;
      package = pkgs.fabricServers.fabric-1_21_11;

      jvmOpts =
        let
          heap_size = "4000M";
        in
        "-Xmx${heap_size} -Xms${heap_size} -XX:+UseZGC -XX:+ZGenerational";

      serverProperties = {
        server-port = 25565;
        enforce-whitelist = true;
        gamemode = "survival";
        white-list = true;
        difficulty = "easy";
        motd = "A Minecraft Server";
        view-distance = 10;
        simulation-distance = 6;
        sync-chunk-writes = false;
        spawn-protection = 0;
      };

      whitelist = import ../secrets/minecraft-whitelist.nix;

      symlinks = {
        "mods" = pkgs.linkFarmFromDrvs "mods" (
          with pkgs;
          builtins.attrValues {
            FabricApi = fetchurl {
              url = "https://cdn.modrinth.com/data/P7dR8mSH/versions/KhCFoeip/fabric-api-0.139.5%2B1.21.11.jar";
              sha512 = "852c9e76175b2d51cea191bfcc0005b824de433f1a6de01d672b9e82ca1cab8478b180670bc6c4811744ef4abec8bd2ff3ab0f9c1aa5644713d06f3fbcc278f0";
            };

            FerriteCore = fetchurl {
              url = "https://cdn.modrinth.com/data/uXXizFIs/versions/eRLwt73x/ferritecore-8.0.3-fabric.jar";
              sha512 = "be600543e499b59286f9409f46497570adc51939ae63eaa12ac29e6778da27d8c7c6cd0b3340d8bcca1cc99ce61779b1a8f52b990f9e4e9a93aa9c6482905231";
            };

            Lithium = fetchurl {
              url = "https://cdn.modrinth.com/data/gvQqBUqZ/versions/4DdLmtyz/lithium-fabric-0.21.1%2Bmc1.21.11.jar";
              sha512 = "0857d30d063dc704a264b2fe774a7e641926193cfdcde72fe2cd603043d8548045b955e30c05b1b2b96ef7d1c0f85d55269da26f44a0644c984b45623e976794";
            };

            NoChatReports = fetchurl {
              url = "https://cdn.modrinth.com/data/qQyHxfxd/versions/78RjC1gi/NoChatReports-FABRIC-1.21.10-v2.16.0.jar";
              sha512 = "39b2f284f73f8290012b8b9cc70085d59668547fc7b4ec43ab34e4bca6b39a6691fbe32bc3326e40353ba9c16a06320e52818315be77799a5aad526370cbc773";
            };

            squaremap = fetchurl {
              url = "https://cdn.modrinth.com/data/PFb7ZqK6/versions/BW8lMXBi/squaremap-fabric-mc1.21.11-1.3.12.jar";
              sha512 = "f62eb791a3f5812eb174565d318f2e6925353f846ef8ac56b4e595f481494e0c281f26b9e9fcfdefa855093c96b735b12f67ee17c07c2477aa7a3439238670d9";
            };

            scalablelux = fetchurl {
              url = "https://cdn.modrinth.com/data/Ps1zyz6x/versions/PV9KcrYQ/ScalableLux-0.1.6%2Bfabric.c25518a-all.jar";
              sha512 = "729515c1e75cf8d9cd704f12b3487ddb9664cf9928e7b85b12289c8fbbc7ed82d0211e1851375cbd5b385820b4fedbc3f617038fff5e30b302047b0937042ae7";
            };

            c2me = fetchurl {
              url = "https://cdn.modrinth.com/data/VSNURh3q/versions/DLKF3HZk/c2me-fabric-mc1.21.11-0.3.6%2Bbeta.1.0.jar";
              sha512 = "d4f983aeb5083033b525522e623a9a9ba86b6fc9c83db008cc0575d0077e736ac9bee0b6b0e03b8d1c89ae27a4e5cdc269041f61eb0d1a10757de4c30b065467";
            };

            krypton = fetchurl {
              url = "https://cdn.modrinth.com/data/fQEb0iXm/versions/O9LmWYR7/krypton-0.2.10.jar";
              sha512 = "4dcd7228d1890ddfc78c99ff284b45f9cf40aae77ef6359308e26d06fa0d938365255696af4cc12d524c46c4886cdcd19268c165a2bf0a2835202fe857da5cab";
            };

            /*
              better-fabric-console = fetchurl {
                url = "https://cdn.modrinth.com/data/Y8o1j1Sf/versions/fZprQjU4/better-fabric-console-mc1.21.10-1.2.7.jar";
                sha512 = "0321e4a687ba5ed4dcb081aa48909d45c4e153f8b6217cd807f280f33250151b97ac80a122a83d48535c788d3c1e08a7ee882da3b20cf06021e03c1ddc943278";
              };
            */

            disconnect-packet-fix = fetchurl {
              url = "https://cdn.modrinth.com/data/rd9rKuJT/versions/Gv74xveQ/disconnect-packet-fix-fabric-2.0.0.jar";
              sha512 = "1fd6f09a41ce36284e1a8e9def53f3f6834d7201e69e54e24933be56445ba569fbc26278f28300d36926ba92db6f4f9c0ae245d23576aaa790530345587316db";
            };

            # Mixin apply for mod packetfixer failed
            /*
              packet-fixer = fetchurl {
                url = "https://cdn.modrinth.com/data/c7m1mi73/versions/LFMYVIc7/packetfixer-fabric-3.3.2-1.21.11.jar";
                sha512 = "a7cdc4b81653ca7c823c91ffd29092365feff78b8d8e019f35ab6c47a0f18661768656cc5fe73f802ab7097d828d8173cc23d32b454a7acd64ff6b7118789413";
              };
            */
          }
        );
      };
    };
  };

  services.caddy.virtualHosts = lib.mkIf (config.services.caddy.enable) {
    "map.${service_configs.https.domain}".extraConfig = ''
      root * ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}/squaremap/web
      file_server browse
    '';
  };

  users.users = lib.mkIf (config.services.caddy.enable) {
    ${config.services.caddy.user}.extraGroups = [
      # for `map.gardling.com`
      config.services.minecraft-servers.group
    ];
  };

  systemd.tmpfiles.rules = [
    "Z ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name} 700 ${config.services.minecraft-servers.user} ${config.services.minecraft-servers.group}"
    "Z ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}/squaremap/web 750 ${config.services.minecraft-servers.user} ${config.services.minecraft-servers.group}"
  ];
}