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

with lib;

{
  options = {
    services.uucp = {
      enable = mkOption {
        type = types.bool;
        default = false;
        description = ''
          If enabled we set up an account accesible via uucp over ssh
        '';
      };

      sshUser = mkOption { 
        type = types.unspecified;
        default = {
          name = "uucp";
          isSystemUser = true;
          isNormalUser = false;
          createHome = true;
          home = "/var/spool/uucp";
          description = "User for uucp over ssh";
        };
        description = "The local uucp linux-user";
      };

      sshConfig = mkOption {
        type = types.str;
        description = "~uucp/.ssh/config";
      };

      remoteNodes = mkOption {
        type = types.listOf types.str;
        default = [];
        description = "List of ports to set up. You will probably need to configure these in sshConfig";
      };

      spoolDir = mkOption {
        type = types.path;
        default = "/var/spool/uucp";
        description = "Spool directory";
      };

      lockDir = mkOption {
        type = types.path;
        default = "/var/spool/uucp";
        description = "Lock directory";
      };

      pubDir = mkOption {
        type = types.path;
        default = "/var/spool/uucppublic";
        description = "Public directory";
      };

      logFile = mkOption {
        type = types.path;
        default = "/var/log/uucp";
        description = "Log file";
      };

      statFile = mkOption {
        type = types.path;
        default = "/var/log/uucp.stat";
        description = "Statistics file";
      };

      debugFile = mkOption {
        type = types.path;
        default = "/var/log/uucp.debug";
        description = "Debug file";
      };

      extraConfig = mkOption {
        type = types.string;
        default = "";
        description = "Extra configuration to append verbatim to `/etc/uucp/config'";
      };
    };
  };

  config = mkIf config.services.uucp.enable {
    environment.etc."uucp/config" = {
      text = ''
        spool ${config.services.uucp.spoolDir}
        lockdir ${config.services.uucp.lockDir}
        pubdir ${config.services.uucp.pubDir}
        logfile ${config.services.uucp.logFile}
        statfile ${config.services.uucp.statFile}
        debugfile ${config.services.uucp.debugFile}
        
        ${config.services.uucp.extraConfig}
      '';
    };

    users.users."uucp" = config.services.uucp.sshUser;

    system.activationScripts."uucp-sshconfig" = ''
      mkdir -p ${config.users.users."uucp".home}/.ssh
      cp ${builtins.toFile "ssh-config" config.services.uucp.sshConfig} ${config.users.users."uucp".home}/.ssh/config
    '';
  };
}