## 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;
  adguardWebPort = 23489;
in {
  imports = [
    ./samba.nix
    inputs.authentik-nix.nixosModules.default
  ];

  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];
      };
    };
  };

  vpnNamespaces."wg" = {
    enable = true;
    wireguardConfigFile = config.sops.secrets.wireguard.path;
    accessibleFrom = [
      "192.168.0.0/24"
      # "127.0.0.1"
    ];

    # 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.slskd.settings.soulseek.listen_port + 1;
        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
        80 # caddy
        443 # caddy
        1900 # jellyfin discovery
        7359 # jellyfin discovery
      ];
    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 = {
      jellyfin = {
        useACMEHost = domain;
        hostName = "jellyfin.${domain}:${toString caddyPort}";
        extraConfig = ''
          reverse_proxy {
            header_up X-Forwarded-For {http.request.header.CF-Connecting-IP}
            to localhost:8096
          }
        '';
      };
      navidrome = {
        useACMEHost = domain;
        hostName = "navidrome.${domain}:${toString caddyPort}";
        extraConfig = ''
          reverse_proxy unix//var/lib/navidrome/navidrome.sock
        '';
      };
      slskd = {
        hostName = "slskd.hopper.xun.host:80";
        extraConfig = ''
          reverse_proxy localhost:${toString config.services.slskd.settings.web.port}
        '';
      };
      transmission = {
        hostName = "transmission.hopper.xun.host:80";
        extraConfig = ''
          reverse_proxy localhost:${toString config.services.transmission.settings.rpc-port}
        '';
      };
      dash = {
        hostName = "dash.hopper.xun.host:80";
        extraConfig = ''
          reverse_proxy localhost:${toString config.services.homepage-dashboard.listenPort}
        '';
      };
      other = {
        useACMEHost = domain;
        hostName = ":${toString caddyPort}";
        extraConfig = ''
          respond 404 {
            body "uhh that doesnt exist, i hope this isnt my fault.."
          }
        '';
      };
      otherPriv = {
        hostName = ":80";
        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 = "/";
          uptime = "";
          units = "metric";
          cputemp = true;
          memory = true;
          network = true;
        };
      }
    ];
    services = [
      {
        "Downloading" = [
          {
            "transmission" = {
              href = "http://transmission.hopper.xun.host";
              icon = "transmission";
            };
          }
          {
            "slskd" = {
              href = "http://slskd.hopper.xun.host";
              icon = "slskd";
            };
          }
        ];
      }
      {
        "Services" = [
          {
            "jellyfin" = {
              href = "https://jellyfin.${domain}";
              icon = "jellyfin";
            };
          }
          {
            "navidrome" = {
              href = "https://navidrome.${domain}";
              icon = "navidrome";
            };
          }
          {
            "adguard home" = {
              href = "http://${config.networking.hostName}:${toString config.services.adguardhome.port}";
              icon = "adguard-home";
            };
          }
          {
            "prometheus" = {
              href = "http://${config.networking.hostName}:${toString config.services.prometheus.port}";
              icon = "prometheus";
            };
          }
        ];
      }
    ];
  };

  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"];
        };
      }
    ];
  };

  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 = 26449;
        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;
  };

  boot.kernel.sysctl."fs.inotify.max_user_watches" = 99999999;

  services.adguardhome = {
    enable = true;
    mutableSettings = false;
    port = adguardWebPort;
    settings = {
      dhcp.enabled = false;
      dns = {
        upstream_dns = [
          "quic://dns.nextdns.io"
          "https://cloudflare-dns.com/dns-query"
          "tls://unfiltered.adguard-dns.com"
          "https://dns10.quad9.net/dns-query"
        ];
        bind_hosts = ["100.115.105.144"];
        bootstrap_dns = ["1.1.1.1" "8.8.8.8"];
      };
      filtering = {
        rewrites = [
          {
            domain = "*.hopper.xun.host";
            answer = "100.115.105.144";
          }
          {
            domain = "hopper.xun.host";
            answer = "100.115.105.144";
          }
        ];
      };
      filters = [
        {
          name = "OISD (Big)";
          url = "https://big.oisd.nl";
          enabled = true;
        }
      ];
    };
  };

  users.groups.${config.services.navidrome.group}.members = ["caddy"]; # for caddy to access socket file
  services.navidrome = {
    enable = true;
    settings = {
      MusicFolder = "/media/library/music";
      Address = "unix:/var/lib/navidrome/navidrome.sock";
      EnableSharing = true;
    };
  };
  systemd.services.navidrome.serviceConfig.EnvironmentFile = config.sops.secrets.navidrome.path;
}