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

let
  ariaDir = "/mnt/downloads/Aria2";
  settingsDir = "${ariaDir}/conf";
  sessionFile = "${settingsDir}/aria2.session";
in
{
  # The nix-provided options force a aria2-user to a certain degree
  systemd.tmpfiles.rules = [
    "d ${ariaDir} 0755 media_user media_group"
    "d ${settingsDir} 0755 media_user media_group"
    "d ${ariaDir}/dl 0755 media_user media_group"
  ];

  systemd.services.aria2 = {
    description = "aria2 Service";
    bindsTo = [ "wg.service" ];
    after = [ "wg.service" ];
    wantedBy = [ "multi-user.target" ];

    preStart = ''
      if [[ ! -e "${sessionFile}" ]]
      then
        touch "${sessionFile}"
      fi
      cp -f "${config.age.secrets.aria2-config.path}" "${settingsDir}/aria2.conf"
    '';

    serviceConfig = {
      Restart = "on-abort";
      ExecStart = "${pkgs.aria2}/bin/aria2c --enable-rpc --conf-path=${settingsDir}/aria2.conf --save-session=${sessionFile}";
      ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
      User = "media_user";
      Group = "media_group";
      NetworkNamespacePath = "/var/run/netns/wg";
      BindReadOnlyPaths = [
        "/etc/netns/wg/resolv.conf:/etc/resolv.conf:norbind"
        "/etc/netns/wg/nsswitch.conf:/etc/nsswitch.conf:norbind"
      ];
    };
  };

  services.nginx.virtualHosts."aria.internal.kempkens.network" = {
    quic = true;
    http3 = true;
    kTLS = true;

    root = "${pkgs.ariang}/share/ariang";
    onlySSL = true;
    useACMEHost = "internal.kempkens.network";

    locations."/jsonrpc" = {
      recommendedProxySettings = true;
      proxyPass = "http://192.168.42.2:6800";
      proxyWebsockets = true;
    };

    locations."/rpc" = {
      recommendedProxySettings = true;
      proxyPass = "http://192.168.42.2:6800";
    };
  };
}