{ nglib, nixpkgs }:
nglib.makeSystem {
  inherit nixpkgs;
  system = "x86_64-linux";
  name = "baikal";
  config = ({ pkgs, config, ... }:
    {
      config = {
        dumb-init = {
          enable = true;
          type.services = { };
        };

        init.services.baikal = {
          shutdownOnExit = true;
          enabled = true;
          script =
            let
              baikal =
                pkgs.fetchzip {
                  url = "https://github.com/sabre-io/Baikal/releases/download/0.9.2/baikal-0.9.2.zip";
                  sha256 = "sha256-Gw7anNA347aYPNrce+unr7QfrOmu249DUlooVzk2fsE=";
                  extraPostFetch = ''
                    patch -p1 -d "$out" < ${./baikal/baikal-project-uri.patch}
                  '';
                };
            in
              pkgs.writeShellScript "baikal-script"
                ''
                   set -ex
                   mkdir -p /var/www
                   if ! [ -z "$(ls -A /var/www)" ] ; then
                     rm -r /var/www/*
                   fi

                   ${pkgs.xorg.lndir}/bin/lndir -silent ${baikal} /var/www/

                   rm -r /var/www/config /var/www/Specific

                   mkdir -p /var/baikal/specific /var/baikal/config /var/webdav
                   ln -s /var/baikal/specific /var/www/Specific
                   ln -s /var/baikal/config /var/www/config
                   chown www-data:www-data -R /var/baikal /var/webdav

                   while :; do sleep 2073600; done
                '';
        };

        init.services.apache2 = {
          shutdownOnExit = true;
          ensureSomething.create."documentRoot" =
            { dst = "/var/www";
              type = "directory";
              persistent = true;
            };
        };

        # init.services.php-fpm.shutdownOnExit = true;

        services.php-fpm = {
          fpmSettings = {
            "error_log" = "/proc/self/fd/1";
          };
          pools = {
            main = {
              createUserGroup = false;
              phpSettings = {
                "user" = "www-data";
              };
              fpmSettings = {
                "pm" = "dynamic";
                "pm.max_children" = 75;
                "pm.start_servers" = 10;
                "pm.min_spare_servers" = 5;
                "pm.max_spare_servers" = 20;
                "pm.max_requests" = 500;
              };
            };
          };
        };

        services.apache2 = {
          enable = true;
          envsubst = true;
          # package =
          #   pkgs.apacheHttpd.override
          #     { aprutil =
          #         pkgs.aprutil.overrideAttrs
          #           (old:
          #             { configureFlags =
          #                 old.configureFlags ++
          #                 [ "--with-sqlite3" ];
          #               buildInputs =
          #                 old.buildInputs ++
          #                 [ pkgs.sqlite.dev
          #                 ];
          #             } );
          #     };
          configuration = [
            {
              LoadModule = [
                [ "mpm_event_module" "modules/mod_mpm_event.so" ]
                [ "log_config_module" "modules/mod_log_config.so" ]
                [ "unixd_module" "modules/mod_unixd.so" ]
                [ "authz_core_module" "modules/mod_authz_core.so" ]
                [ "dir_module" "modules/mod_dir.so" ]
                [ "mime_module" "modules/mod_mime.so" ]
                [ "proxy_module" "modules/mod_proxy.so" ]
                [ "proxy_fcgi_module" "modules/mod_proxy_fcgi.so" ]

                [ "rewrite_module" "modules/mod_rewrite.so" ]
                [ "alias_module" "modules/mod_alias.so" ]

                [ "authn_core_module" "modules/mod_authn_core.so" ]
                [ "dav_module" "modules/mod_dav.so" ]
                [ "dav_fs_module" "modules/mod_dav_fs.so" ]
                [ "auth_digest_module" "modules/mod_auth_digest.so" ]
                [ "auth_basic_module" "modules/mod_auth_basic.so" ]
                [ "dbd_module" "modules/mod_dbd.so" ]
                [ "authn_dbd_module" "modules/mod_authn_dbd.so" ]
                [ "authz_user_module" "modules/mod_authz_user.so" ]
                [ "authz_host_module" "modules/mod_authz_host.so" ]
                [ "headers_module" "modules/mod_headers.so" ]
              ];
            }
            {
              Listen = "0.0.0.0:80";

              ServerRoot = "/var/www";
              ServerName = "blowhole";
              PidFile = "/httpd.pid";

              DocumentRoot = "/var/www";

              User = "www-data";
              Group = "www-data";
            }

            {
              ErrorLog = "/dev/stderr";
              TransferLog = "/dev/stdout";

              LogLevel = "info";
            }

            {
              AddType = [
                [ "image/svg+xml" "svg" "svgz" ]
              ];
              AddEncoding = [ "gzip" "svgz" ];

              TypesConfig = "${pkgs.apacheHttpd}/conf/mime.types";
            }

            {
              Directory."/" = {
                Require = [ "all" "denied" ];
                Options = "SymlinksIfOwnerMatch";
              };

              VirtualHost."*:80" = {
                DocumentRoot = "/var/www/";
                RewriteEngine = "off";
                LogLevel = [ "alert" "rewrite:trace3" ];

                RewriteRule =
                  [ [ "/.well-known/carddav" "/dav.php" "[R=308,L]" ]
                    [ "/.well-known/caldav" "/dav.php" "[R=308,L]" ]
                    # [ "^/baikal/(.*)\.php$" "unix:${config.services.php-fpm.pools.main.socket}|fcgi:///var/www/html/$0" ]
                    # [ "^/dav(.*)$" "/webdav/%{LA-U:REMOTE_USER}" "" ]
                    # [ "^/baikal(.*)$" "/var/www/html/$1" "" ]
                  ];

                # DBDriver = "sqlite3";
                # DBDParams = "/var/baikal/specific/db.sqlite";

                # DBDMin = 4;
                # DBDKeep = 8;
                # DBDMax  = 20;
                # DBDExptime = 300;

                  # Location."/var/www/html/baikal" = {
                  #   Require = [ "all" "granted" ];
                  #   AllowOverride = [ "all" ];
                  #   Options = [ "-Indexes" "+FollowSymlinks" ];
                  #   DirectoryIndex = "index.php";
                  #   RewriteRule = [ "^/baikal/(.*)$" "/" ];
                  # };

                  Location."/var/www/html/" = {
                    Header =
                      [ [ "set" "X-Baikal-Uri" "http://localhost:8088/baikal" ]
                        [ "set" "Host" "http://localhost:8088/baikal" ]
                      ];
                    Options = [ "-Indexes" "+FollowSymlinks" ];
                    Require = [ "all" "granted" ];
                    AllowOverride = [ "all" ];
                    # ProxyPass = [ "unix:${config.services.php-fpm.pools.main.socket}|fcgi:///var/www/html/" ];
                  };

                  # "/var/webdav" = {
                  #   DAV = "on";
                  #   AuthType = "Digest";
                  #   AuthName = "BaikalDAV";

                  #   Require = "valid-user";

                  #   AuthDigestProvider = [ "dbd" ];
                  #   AuthDBDUserRealmQuery = "\"SELECT digesta1 FROM users WHERE username = %s\"";
                  #   AuthDBDUserPWQuery = "\"SELECT digesta1 FROM users WHERE username = %s\"";

                  #   Options = [ "+Indexes" "+FollowSymLinks" "+MultiViews" ];
                  #   AllowOverride = [ "all" ];
                  # };
                };
            }
          ];
        };
      };
    });
}