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

with lib;
let
  cfg = config.services.shibboleth-sp;
in {
  options = {
    services.shibboleth-sp = {
      enable = mkOption {
        type = types.bool;
        default = false;
        description = "Whether to enable the shibboleth service";
      };

      configFile = mkOption {
        type = types.path;
        example = "${pkgs.shibboleth-sp}/etc/shibboleth/shibboleth2.xml";
        description = "Path to shibboleth config file";
      };

      fastcgi.enable = mkOption {
        type = types.bool;
        default = false;
        description = "Whether to include the shibauthorizer and shibresponder FastCGI processes";
      };

      fastcgi.shibAuthorizerPort = mkOption {
        type = types.int;
        default = 9100;
        description = "Port for shibauthorizer FastCGI proccess to bind to";
      };

      fastcgi.shibResponderPort = mkOption {
        type = types.int;
        default = 9101;
        description = "Port for shibauthorizer FastCGI proccess to bind to";
      };
    };
  };

  config = mkIf cfg.enable {
    systemd.services.shibboleth-sp = {
      description = "Provides SSO and federation for web applications";
      after       = lib.optionals cfg.fastcgi.enable [ "shibresponder.service" "shibauthorizer.service" ];
      wantedBy    = [ "multi-user.target" ];
      serviceConfig = {
        ExecStart = "${pkgs.shibboleth-sp}/bin/shibd -F -d ${pkgs.shibboleth-sp} -c ${cfg.configFile}";
      };
    };

    systemd.services.shibresponder = mkIf cfg.fastcgi.enable {
      description = "Provides SSO through Shibboleth via FastCGI";
      after       = [ "network.target" ];
      wantedBy    = [ "multi-user.target" ];
      path    	  = [ "${pkgs.spawn_fcgi}" ];
      environment.SHIBSP_CONFIG = "${cfg.configFile}";
      serviceConfig = {
        ExecStart = "${pkgs.spawn_fcgi}/bin/spawn-fcgi -n -p ${toString cfg.fastcgi.shibResponderPort} ${pkgs.shibboleth-sp}/lib/shibboleth/shibresponder";
      };
    };

    systemd.services.shibauthorizer = mkIf cfg.fastcgi.enable {
      description = "Provides SSO through Shibboleth via FastCGI";
      after       = [ "network.target" ];
      wantedBy    = [ "multi-user.target" ];
      path    	  = [ "${pkgs.spawn_fcgi}" ];
      environment.SHIBSP_CONFIG = "${cfg.configFile}";
      serviceConfig = {
        ExecStart = "${pkgs.spawn_fcgi}/bin/spawn-fcgi -n -p ${toString cfg.fastcgi.shibAuthorizerPort} ${pkgs.shibboleth-sp}/lib/shibboleth/shibauthorizer";
      };
    };
  };
}