dotfiles/modules/nixos/nas/syncthing/config/default.nix

{
  flake,
  ...
}:
let
  inherit (flake.config.people) user0;
  inherit (flake.config.services) instances;
  serviceCfg = instances.syncthing;
in
{
  syncthingVM =
    {
      user,
      ip,
      mac,
      userMac,
      ssh,
      syncID,
      deviceIP,
    }:
    {
      microvm.vms = {
        "${serviceCfg.name}-${user}" = {
          autostart = true;
          restartIfChanged = true;
          config = {
            system.stateVersion = "24.05";
            time.timeZone = "America/Winnipeg";
            users.users.root.openssh.authorizedKeys.keys = flake.config.people.users.${user0}.sshKeys;
            services = {
              syncthing = {
                enable = true;
                overrideDevices = false;
                overrideFolders = false;
                openDefaultPorts = true;
                systemService = true;
                guiAddress = "0.0.0.0:${toString serviceCfg.ports.port0}";
                settings = {
                  folders = {
                    docs = {
                      enable = true;
                      id = "docs";
                      path = "/var/lib/${serviceCfg.name}/docs";
                      devices = [
                        "${user}Phone"
                      ];
                    };
                    media = {
                      enable = true;
                      id = "media";
                      path = "/var/lib/${serviceCfg.name}/media";
                      devices = [
                        "${user}Phone"
                      ];
                    };
                    misc = {
                      enable = true;
                      id = "misc";
                      path = "/var/lib/${serviceCfg.name}/misc";
                      devices = [
                        "${user}Phone"
                      ];
                    };
                  };
                  devices = {
                    "${user}Phone" = {
                      autoAcceptFolders = true;
                      name = "${user}Phone";
                      addresses = [
                        "tcp://${deviceIP}:${toString serviceCfg.ports.port2}"
                      ];
                      id = syncID;
                    };
                  };
                };
              };

              openssh = {
                enable = true;
                settings = {
                  PasswordAuthentication = false;
                  PermitRootLogin = "prohibit-password";
                };
              };
            };

            networking.firewall.allowedTCPPorts = [
              22
              serviceCfg.ports.port0
              serviceCfg.ports.port1
              serviceCfg.ports.port2
            ];

            systemd = {
              services = {
                systemd-networkd.wantedBy = [
                  "multi-user.target"
                ];
              };
              network = {
                enable = true;
                networks."20-lan" = {
                  matchConfig.Name = "enp0s5";
                  addresses = [
                    { Address = "${ip}/24"; }
                  ];
                  routes = [
                    {
                      Destination = "0.0.0.0/0";
                      Gateway = "192.168.50.1";
                    }
                  ];
                  dns = [
                    "1.1.1.1"
                    "8.8.8.8"
                  ];
                };
              };

              tmpfiles.rules = [
                "d /var/lib/${serviceCfg.name} 0755 ${serviceCfg.name} ${serviceCfg.name} -"
                "d /var/lib/${serviceCfg.name}/docs 0755 ${serviceCfg.name} ${serviceCfg.name} -"
                "d /var/lib/${serviceCfg.name}/media 0755 ${serviceCfg.name} ${serviceCfg.name} -"
                "d /var/lib/${serviceCfg.name}/misc 0755 ${serviceCfg.name} ${serviceCfg.name} -"
              ];

            };

            microvm = {
              vcpu = 1;
              mem = 512;
              hypervisor = "qemu";
              interfaces = [
                {
                  type = "tap";
                  id = "vm-st-${user}";
                  mac = mac;
                }
                {
                  type = "user";
                  id = "vm-sync";
                  mac = userMac;
                }
              ];
              forwardPorts = [
                {
                  from = "host";
                  host.port = ssh;
                  guest.port = 22;
                }
              ];
              shares = [
                {
                  mountPoint = "/nix/.ro-store";
                  proto = "virtiofs";
                  source = "/nix/store";
                  tag = "read_only_nix_store";
                }
                {
                  mountPoint = "/var/lib/${serviceCfg.name}";
                  proto = "virtiofs";
                  source = "/mnt/storage/users/${user}/guests/${serviceCfg.name}";
                  tag = "${serviceCfg.name}_${user}_data";
                }
                {
                  mountPoint = "/var/lib/${serviceCfg.name}/docs";
                  proto = "virtiofs";
                  source = "/mnt/storage/users/${user}/home/docs";
                  tag = "${serviceCfg.name}_${user}_docs";
                }
                {
                  mountPoint = "/var/lib/${serviceCfg.name}/media";
                  proto = "virtiofs";
                  source = "/mnt/storage/users/${user}/home/media";
                  tag = "${serviceCfg.name}_${user}_media";
                }
                {
                  mountPoint = "/var/lib/${serviceCfg.name}/misc";
                  proto = "virtiofs";
                  source = "/mnt/storage/users/${user}/home/misc";
                  tag = "${serviceCfg.name}_${user}_misc";
                }
                {
                  mountPoint = "/run/secrets";
                  proto = "virtiofs";
                  source = "/run/secrets/${serviceCfg.name}";
                  tag = "host_secrets";
                }
              ];
            };
          };
        };
      };

      systemd.tmpfiles.rules = [
        "d /mnt/storage/users/${user}/guests/${serviceCfg.name} 0751 microvm wheel - -"
      ];

      sops.secrets = {
        "${serviceCfg.name}/${user}-pass" = {
          owner = "root";
          mode = "0600";
        };
      };
    };
}