## TODO look into sops-nix placeholders
## reference: https://github.com/javigomezo/nixos/blob/b3ebe8d570ea9b37aea8bb3a343f6e16e054e322/services/network/authelia/user_database.nix
{
  pkgs,
  inputs,
  config,
  lib,
  ...
}: let
  l = lib // builtins;
  domain = "xunuwu.xyz";
  caddyPort = 8336;
  slskdUiPort = 23488;
  caddyLocal = 8562;
  ncPort = 46523;
  kanidmPort = 8300;
in {
  imports = [
    ./samba.nix
  ];

  ## TODO use kanidm
  ## TODO use impermanence
  ## TODO setup fail2ban mayb

  users.groups.media = {};
  users.users.media = {
    isSystemUser = true;
    group = "media";
  };

  security.acme = {
    acceptTerms = true;
    defaults.email = "xunuwu@gmail.com";
    certs = {
      ${domain} = {
        domain = "*.${domain}";
        dnsProvider = "cloudflare";
        reloadServices = ["caddy.service"];
        credentialFiles.CF_DNS_API_TOKEN_FILE = config.sops.secrets.cloudflare.path;
        extraDomainNames = [domain];
      };
      "kanidm.${domain}" = {
        domain = "kanidm.${domain}";
        group = "kanidm";
        dnsProvider = "cloudflare";
        reloadServices = ["caddy.service" "kanidm.service"];
        credentialFiles.CF_DNS_API_TOKEN_FILE = config.sops.secrets.cloudflare.path;
      };
    };
  };

  vpnNamespaces."wg" = {
    enable = true;
    wireguardConfigFile = config.sops.secrets.wireguard.path;
    accessibleFrom = [
      "192.168.0.0/24"
    ];

    # Forwarded to my vpn, for making things accessible from outside
    openVPNPorts = [
      {
        port = caddyPort;
        protocol = "tcp";
      }
      {
        port = config.services.slskd.settings.soulseek.listen_port;
        protocol = "both";
      }
      {
        port = config.services.transmission.settings.peer-port;
        protocol = "both";
      }
    ];

    # From inside of the vpn namespace to outside of it, for making things inside accessible to LAN
    portMappings = let
      passthrough = [
        caddyPort
        slskdUiPort
        1900 # jellyfin discovery
        7359 # jellyfin discovery
        config.services.transmission.settings.rpc-port
        80 # homepage
      ];
    in (l.map (x: {
        from = x;
        to = x;
      })
      passthrough);
  };

  networking.firewall = {
    allowedUDPPorts = [1900 7359]; # Jellyfin auto-discovery
    allowedTCPPorts = [
      # caddy lan ports
      80
      443
      2345
    ];
  };

  systemd.services.caddy.vpnConfinement = {
    enable = true;
    vpnNamespace = "wg";
  };

  services.caddy = {
    enable = true;
    virtualHosts = builtins.mapAttrs (n: v:
      {
        useACMEHost = domain;
        hostName = "${n}.${domain}:${toString caddyPort}";
      }
      // v) {
      jellyfin.extraConfig = "reverse_proxy localhost:8096"; # TODO setup proper auth
      kanidm = {
        useACMEHost = null;
        # hostName = "kanidm.xunuwu.xyz:${toString caddyPort}";
        extraConfig = ''
          reverse_proxy https://127.0.0.1:${toString kanidmPort} {
            header_up Host {upstream_hostport}
            header_down Access-Control-Allow-Origin "*"
            transport http {
              tls_server_name ${config.services.kanidm.serverSettings.domain}
            }
          }
        '';
      };
      slskd = {
        useACMEHost = null;
        hostName = ":${toString slskdUiPort}";
        extraConfig = ''
          reverse_proxy localhost:${toString config.services.slskd.settings.web.port}
        '';
      };
      dash = {
        useACMEHost = null;
        hostName = ":80";
        extraConfig = "reverse_proxy localhost:${toString config.services.homepage-dashboard.listenPort}";
      };
      # nextcloud.extraConfig = "reverse_proxy localhost:${toString ncPort}";
      other = {
        hostName = ":${toString caddyPort}";
        extraConfig = ''
          respond 404 {
            body "uhh that doesnt exist, i hope this isnt my fault.."
          }
        '';
      };
    };
  };

  systemd.services.homepage-dashboard.vpnConfinement = {
    enable = true;
    vpnNamespace = "wg";
  };

  services.homepage-dashboard = {
    enable = true;
    widgets = [
      {
        resources = {
          cpu = true;
          disk = "/";
          memory = true;
        };
      }
    ];
    services = [
      {
        "Obtaining" = [
          {
            "transmission" = {
              href = "http://${config.networking.hostName}:9091";
              icon = "transmission";
            };
          }
          {
            "slskd" = {
              href = "http://${config.networking.hostName}:23488";
              icon = "slskd";
            };
          }
        ];
      }
      {
        "Services" = [
          {
            "jellyfin" = {
              href = "https://jellyfin.xunuwu.xyz";
              icon = "jellyfin";
            };
          }
        ];
      }
    ];
  };

  systemd.services.jellyfin.vpnConfinement = {
    enable = true;
    vpnNamespace = "wg";
  };

  services.jellyfin = {
    enable = true;
  };

  services.prometheus = {
    enable = true;
    port = 9001;
    extraFlags = ["--storage.tsdb.retention.time=30d"];
    scrapeConfigs = [
      {
        job_name = "node";
        static_configs = lib.singleton {
          targets = ["127.0.0.1:${toString config.services.prometheus.exporters.node.port}"];
        };
      }
      {
        job_name = "tailscale_client";
        static_configs = lib.singleton {
          targets = ["100.100.100.100"];
        };
      }
      # TODO figure out why i cant connect to slskd locally
      # {
      #   job_name = "slskd";
      #   static_configs = lib.singleton {
      #     targets = ["127.0.0.1:${toString slskdUiPort}"];
      #   };
      # }
    ];
  };

  services.prometheus.exporters = {
    node = {
      enable = true;
      enabledCollectors = ["systemd"];
    };
    systemd.enable = true;
  };

  systemd.services.slskd.vpnConfinement = {
    enable = true;
    vpnNamespace = "wg";
  };

  services.slskd = {
    enable = true;
    environmentFile = config.sops.secrets.slskd.path;
    domain = null; # why isnt this the default?
    settings = {
      metrics = {
        enabled = true;
        authentication.disabled = true;
      };
      remote_file_management = true;
      shares.directories = ["/media/library/music"];
      soulseek = {
        listen_port = 14794;
        description = "";
      };
      global = {
        upload = {
          slots = 50;
          speed_limit = 10000;
        };
        download.speed_limit = 10000;
      };
    };
  };

  systemd.services.transmission.vpnConfinement = {
    enable = true;
    vpnNamespace = "wg";
  };

  services.transmission = {
    enable = true;
    package = pkgs.transmission_4;
    performanceNetParameters = true;
    settings = let
      mbit = 125;
    in {
      speed-limit-up-enabled = true;
      speed-limit-up = 100 * mbit;
      speed-limit-down-enabled = true;
      speed-limit-down = 150 * mbit;
      rpc-authentication-required = true;
      peer-port = 11936;
      rpc-bind-address = "0.0.0.0";
      rpc-whitelist = "127.0.0.1,192.168.\*.\*";
    };
    credentialsFile = config.sops.secrets.transmission.path;
  };

  # TODO use this for sso with some things maybe
  # services.tailscaleAuth = {
  #   enable = true;
  #   user = config.services.caddy.user;
  #   group = config.services.caddy.group;
  # };

  systemd.services.kanidm = {
    vpnConfinement = {
      enable = true;
      vpnNamespace = "wg";
    };
    serviceConfig = {
      InaccessiblePaths = lib.mkForce [];
    };
  };
  boot.kernel.sysctl."fs.inotify.max_user_watches" = 524288;
  services.kanidm = {
    package = pkgs.kanidm_1_4.override {enableSecretProvisioning = true;};
    enableServer = true;
    serverSettings = {
      domain = "kanidm.${domain}";
      origin = "https://kanidm.${domain}";
      bindaddress = "127.0.0.1:${toString kanidmPort}";
      ldapbindaddress = "[::1]:3636";
      trust_x_forward_for = true;
      tls_chain = "${config.security.acme.certs."kanidm.${domain}".directory}/fullchain.pem";
      tls_key = "${config.security.acme.certs."kanidm.${domain}".directory}/key.pem";
    };
    provision = {
      enable = true;
      adminPasswordFile = config.sops.secrets."kanidm/admin_pass".path;
      idmAdminPasswordFile = config.sops.secrets."kanidm/idm_admin_pass".path;
      persons = {
        "xun" = {
          displayName = "xun";
          legalName = "xun";
          mailAddresses = ["xunuwu@gmail.com"];
          groups = [];
        };
      };
    };
  };

  ## TODO: add forgejo
}