{
  config,
  lib,
  pkgs,
  homeage,
  ...
}: let
  hostName = "surtur";
in {
  home.username = "$USER";
  home.sessionVariables.HOSTNAME = "${hostName}";
  home.homeDirectory = "/home/$USER";
  home.stateVersion = "22.11";

  # build configuration and switch:
  # ➜ home-manager switch --no-out-link -b backup --flake~/utils/dotfiles#$HOST

  # alternatively, install HM with:
  #   nix profile install --priority 0 home-manager
  # hit the issue described here, waiting until resolved:
  #   https://github.com/nix-community/home-manager/issues/2848
  programs.home-manager.enable = true;
  programs.home-manager.path = "$HOME/utils/dotfiles";

  home.packages = with pkgs; [
    direnv
    # lorri and arion are apparently provided by cachix#devenv
    alejandra
    statix
    niv
    rnix-lsp
    duf
    dua
    du-dust
    zellij
    cloak
    headscale
    btop
    sops
    ccache
  ];

  homeage = {
    # Absolute path to identity (created not through home-manager)
    identityPaths = [
      "~/.ssh/theEd"
    ];

    # "activation" if system doesn't support systemd
    installationType = "systemd";

    file."sops-age-keys.txt" = {
      # Path to encrypted file tracked by the git repository
      source = ./secrets/sops-keys.age;
      # can be "copies" or "symlink"
      symlinks = [".config/sops/age/keys.txt"];
    };

    file."envs" = {
      source = ./secrets/envs.age;
    };

    # infra secrets.
    file."infra-backend" = {
      source = ./secrets/infra-backend.age;
    };
    file."infra-vars" = {
      source = ./secrets/infra-vars.age;
    };
  };


  imports = [
    ./nix/programs.nix
  ];

  home.file = {
    ".config/kitty/kitty.conf" = {
      source = .config/kitty/kitty.conf;
    };

    ".vimrc" = {
      source = ./.vim/vimrc;
    };
    ".vim/deoplete.vimrc.vim" = {
      source = ./.vim/deoplete.vimrc.vim;
    };
    ".vim/gotags.vimrc.vim" = {
      source = ./.vim/gotags.vimrc.vim;
    };
    ".vim/python.vimrc.vim" = {
      source = ./.vim/python.vimrc.vim;
    };

    ".config/sway/config" = {
      source = ./.config/sway/config;
    };
    ".config/sway/env" = {
      source = ./.config/sway/env;
    };
    ".config/sway/inputs" = {
      source = ./.config/sway/inputs;
    };
    ".config/sway/config.d/dracula.sway" = {
      source = ./.config/sway/config.d/dracula.sway;
    };
    ".config/waybar/config" = {
      source = ./.config/waybar/config;
    };
    ".config/waybar/style.css" = {
      source = ./.config/waybar/style.css;
    };
    ".config/waybar/modules/storage.sh" = {
      source = ./.config/waybar/modules/storage.sh;
    };
    ".config/kanshi/config" = {
      source = ./.config/kanshi/config;
    };
    ".config/mako/config" = {
      source = ./.config/mako/config;
    };
    ".local/bin/swws.py" = {
      source = ./bin/swws.py;
    };
    ".local/bin/sway-locker" = {
      source = ./bin/sway-locker;
    };

    ".config/fusuma/config-wl.yml" = {
      source = ./.config/fusuma/config-wl.yml;
    };
    ".config/fusuma/config.yml" = {
      source = ./.config/fusuma/config.yml;
    };

    ".config/git/config-common" = {
      source = ./.config/git/config;
    };
    # host-specific gitconfig.
    ".config/git/config.${hostName}" = {
      text = ''
        [user]
            name = ${hostName}
            email = wanderer@dotya.ml
            signingkey = ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBtG6NCgdLHX4ztpfvYNRaslKWZcl6KdTc1DehVH4kAL
      '';
    };
    ".config/git/config" = {
      text = ''
        [include]
          path = ~/.config/git/config-common
        [include]
          path = ~/.config/git/config.${hostName}
      '';
    };
    ".config/git/allowed_signers" = {
      source = ./.config/git/allowed_signers;
    };

    # begin zsh-related.
    ".zshrc" = {
      source = ./.zshrc;
    };
    ".zshenv" = {
      source = ./.zshenv;
    };
    ".zprofile" = {
      source = ./.zprofile;
    };
    ".zsh" = {
      source = ./.zsh;
      recursive = true;
    };
    ".zsh/bemenu-dracula" = {
      source = pkgs.fetchFromGitHub {
        owner = "dracula";
        repo = "bemenu";
        rev = "9b1165b3d97e3b2a74c6ce220781b78d8a11febf";
        sha256 = "sha256-TwfkEZ1aTkHur+jCqRsaqvzOw6qpH0L4pvYqkx7iCDk=";
      };
    };
    # end zsh-related.

    ".cargo/config.toml" = {
      source = .cargo/config.toml;
    };

    ".npmrc" = {
      text = ''
        prefix=''${HOME}/.npm-packages
        audit=false
        fund=false
      '';
    };

    ".config/swaylock/config" = {
      source = .config/swaylock/config;
    };
    ".config/tridactyl/tridactylrc" = {
      source = .config/tridactyl/tridactylrc;
    };

    ".config/bat/config" = {
      source = .config/bat/config;
    };

    ".ncpamixer.conf" = {
      source = .config/ncpamixer.conf;
    };

    ".gdbinit" = {
      text = ''
        set auto-load safe-path /nix/store
        set history save on
        set history size 10000
        set history remove-duplicates 100
        set history filename ~/.gdb_history
      '';
    };

    ".local/bin/fuzzypassage" = {
      executable = true;
      text = ''
        PREFIX="''${PASSAGE_DIR:-$HOME/.passage/store}"
        FZF_DEFAULT_OPTS=""
        name="$(find "$PREFIX" -type f -name '*.age' | \
          sed -e "s|$PREFIX/||" -e 's|\.age$||' | \
          fzf --height 40% --reverse --no-multi)"
        passage "''${@}" "$name"
      '';
    };

    ".local/bin/battery.sh" = {
      source = bin/battery.sh;
      executable = true;
    };
    ".local/bin/localbsync" = {
      source = bin/localbsync;
      executable = true;
    };
    ".local/bin/parec-wr" = {
      source = bin/parec-wr;
      executable = true;
    };
    ".local/bin/pscbg" = {
      source = bin/pscbg;
      executable = true;
    };
    ".local/bin/qst_up" = {
      source = bin/qst_up;
      executable = true;
    };
    ".local/bin/winprint.sh" = {
      source = bin/winprint.sh;
      executable = true;
    };

    ".local/bin/authenticator.sh" = {
      text = ''
        #!/bin/sh

        # adopted from https://wiki.archlinux.org/index.php/Google_Authenticator
        # This is the path to the Google Authenticator app file.  It's typically located
        # in /data under Android.  Copy it to your PC in a safe location and specify the
        # path to it here.
        #DB="/path/to/com.google.android.apps.authenticator/databases/databases"
        DB="$1"


        if [ $# -ne 1 ]; then
            printf "authenticator\n"
            printf "usage: authenticator <path/to/org.authenticator/databases/databases>\n"
            printf "\tThis is the path to the Authenticator app owned SQLite db file.\n"
            printf "\tCopy it to your PC to a safe location and specify the path to it here.\n"
            exit 1
        fi


        # On most Android systems with sufficient user access, the Google Authenticator
        # database can be copied off the device and accessed directly, as it is an
        # sqlite3 database. This shell script will read a Google Authenticator database
        # and generate live codes for each key found:


        sqlite3 "$DB" 'SELECT email,secret FROM accounts;' | while read A
        do
                NAME=`echo "$A" | cut -d '|' -f 1`
                KEY=`echo "$A" | cut -d '|' -f 2`
                CODE=`oathtool --totp -b "$KEY"`
                echo -e "\e[1;32m$CODE\e[0m - \e[1;33m$NAME\e[0m"
        done
      '';
      executable = true;
    };
    ".local/bin/createarchive.sh" = {
      text = ''
        #!/bin/bash

        if [ $# -ne 1 ]; then
            printf "createarchive\n"
            printf "usage: createarchive <folder to be archived>\n"
            printf "warning: the archive will be moved to "backups" directory (`echo $dest`)\n"
            exit 1
        fi


        # what this does in short: tar, compress, timestamp, shred the tar, mv .xz to pwd and display it
        logdate="$(date +%Y%m%dT%H%M%S)"
        basedir="$1"
        tmpdir=$(mktemp -d "${TMPDIR:-/tmp/}$(basename $0).XXXXXXXXXX")
        #/run/user/$(id -u) tmpfs 0700 perms
        f="`cd $basedir; pwd | tr '/' ' ' | sed 's/^.* / /' | cut -c2-`" > /dev/null
        g="$logdate-$f.tar"
        dest=~/MEGA/Private/backups

        doathing() {
            cd $basedir/..
            tar cfv "$tmpdir/$g" "$f" && \
            xz -vzk9e "$tmpdir/$g" -S .xz && \
            rsync -avP "$tmpdir/$g.xz" "$dest" && \
            shred -zuv "$tmpdir/$g" "$tmpdir/$g.xz" && \
            printf "\n"
            ls -latr "$dest/$g.xz"
        }

        if [ ! -d $1 ]; then
            echo "$1 is not a directory"
            exit 1
        else
            echo `pwd`
            echo "$f"
            echo "$1"

            doathing
            trap "rm -rfv $tmpdir" 0 1 3 15
            exit $?
        fi
      '';
      executable = true;
    };
    ".config/qutebrowser/userscripts/localhost" = {
      executable = true;
      text = ''
        #!/usr/bin/env bash

        export BEMENU_OPTS="--tb '#6272a4' --tf '#f8f8f2' --fb '#282a36' --ff '#f8f8f2'
        --nb '#282a36' --nf '#6272a4' --hb '#44475a' --hf '#50fa7b' --sb '#44475a' --sf
        '#50fa7b' --scb '#282a36' --scf '#ff79c6' -p 'localhost:<port> ▶' --fork -l 5
        --fn 'FiraCode Retina 17'"

        if [[ $1 -eq 'list' ]] && [[ -z $QUTE_COUNT ]];
        then
            PORTS="$(ss -nltp | tail -n +2 |  awk '{print $4}' | awk -F: '{print $2}')"
            QUTE_COUNT=$(echo "$PORTS" | bemenu -n )
        fi

        # echo open -t localhost:''${QUTE_COUNT:-8080} > $QUTE_FIFO
        [ -n "$QUTE_COUNT" ] && echo open -t localhost:"''${QUTE_COUNT}" > $QUTE_FIFO
      '';
    };
    ".config/qutebrowser/userscripts/speak" = {
      executable = true;
      text = ''
        #!/bin/bash
        export IFS=$'\n'
        pkill -f qute_speak || {
                ~/.local/bin/gtts-cli "$QUTE_SELECTED_TEXT" | mpv --no-video --speed=1.26 -
                # ~/.local/bin/gtts-cli "$QUTE_SELECTED_TEXT" > /tmp/qute_speak.mp3
                # mpv /tmp/qute_speak.mp3
        }
      '';
    };
    ".config/qutebrowser/userscripts/dark_mode.user" = {
      executable = true;
      text = ''
        #!/bin/zsh

        # on a new system cp DR.js DarkReader.user.js
        darkreader_file="$HOME/.config/qutebrowser/greasemonkey/DarkReader.user.js"
        enabled="^//DarkReader.disable();"
        darkreader_enabled="$(grep -q -e "$enabled" $darkreader_file; echo $?)"
        # echo $darkreader_enabled

        if [[ "$(echo $darkreader_enabled)" == "1" ]]; then
            # enable DarkReader by commenting out the line that disables it.
            sed -i --follow-symlink 's/DarkReader.disable()/\/\/DarkReader.disable()/' "$darkreader_file"
        else
            # disable DarkReader
            sed -i --follow-symlink 's/\/\/DarkReader.disable()/DarkReader.disable()/' "$darkreader_file"
        fi
      '';
    };
    ".config/qutebrowser/greasemonkey/DR.js" = {
      text = ''
        // ==UserScript==
        // @name          Dark Reader (Unofficial)
        // @icon          https://darkreader.org/images/darkreader-icon-256x256.png
        // @namespace     DarkReader
        // @description	 Inverts the brightness of pages to reduce eye strain
        // @version       4.9.52
        // @author        https://github.com/darkreader/darkreader#contributors
        // @homepageURL   https://darkreader.org/ | https://github.com/darkreader/darkreader
        // @run-at        document-end
        // @grant         none
        // @exclude       https://git.dotya.ml*
        // @exclude       https://dotya.ml*
        // @exclude       https://status.dotya.ml*
        // @exclude       https://searxng.dotya.ml*
        // @exclude       https://grafana.dotya.ml*
        // @exclude       https://github.com*
        // @exclude       https://dnswatch.com*
        // @exclude       https://docs.immudb.io*
        // @exclude       https://woodpecker-ci.org*
        // @exclude       https://duckduckgo.com*
        // @exclude       https://www.redit.com*
        // @exclude       https://codeberg.org*
        // @include       http*
        // @require       https://cdn.jsdelivr.net/npm/darkreader/darkreader.min.js
        // @noframes
        // ==/UserScript==

        DarkReader.enable({
            brightness: 105,
            contrast: 105,
            sepia: 0
        });
        DarkReader.disable();
      '';
    };
    ".config/qutebrowser/userscripts/code_select.py" = {
      executable = true;
      source = .local/share/qutebrowser/userscripts/code_select.py;
    };
    ".config/qutebrowser/userscripts/getbib" = {
      executable = true;
      source = .local/share/qutebrowser/userscripts/getbib;
    };
    ".config/qutebrowser/userscripts/qute-gemini" = {
      executable = true;
      source = .local/share/qutebrowser/userscripts/qute-gemini;
    };
    ".config/qutebrowser/userscripts/qute-gemini-tab" = {
      executable = true;
      source = .local/share/qutebrowser/userscripts/qute-gemini;
    };
    ".config/qutebrowser/config.py" = {
      source = .config/qutebrowser/config.py;
    };

    ".local/bin/workqb" = {
      text = ''
        #!/bin/zsh

        qutebrowser \
          --restore work \
          --config ~/.config/qutebrowser/config.py \
          --basedir ~/.config/qutebrowser-work \
          &
        disown
      '';
      executable = true;
    };

    # ref: https://go.dev/blog/pprof
    ".local/bin/xtime" = {
      text = ''
        #!/bin/sh
        /usr/bin/time -f '%Uu %Ss %er %MkB %C' "$@"
      '';
      executable = true;
    };

    ".local/bin/xdp-screen-cast" = {
      text = ''
        #!/usr/bin/python3

        # ref: https://gitlab.gnome.org/-/snippets/19

        import re
        import signal
        import dbus
        from gi.repository import GLib
        from dbus.mainloop.glib import DBusGMainLoop

        import gi
        gi.require_version('Gst', '1.0')
        from gi.repository import GObject, Gst

        DBusGMainLoop(set_as_default=True)
        Gst.init(None)

        loop = GLib.MainLoop()

        bus = dbus.SessionBus()
        request_iface = 'org.freedesktop.portal.Request'
        screen_cast_iface = 'org.freedesktop.portal.ScreenCast'

        pipeline = None

        def terminate():
            if pipeline is not None:
                self.player.set_state(Gst.State.NULL)
            loop.quit()

        request_token_counter = 0
        session_token_counter = 0
        sender_name = re.sub(r'\.', r'_', bus.get_unique_name()[1:])

        def new_request_path():
            global request_token_counter
            request_token_counter = request_token_counter + 1
            token = 'u%d'%request_token_counter
            path = '/org/freedesktop/portal/desktop/request/%s/%s'%(sender_name, token)
            return (path, token)

        def new_session_path():
            global session_token_counter
            session_token_counter = session_token_counter + 1
            token = 'u%d'%session_token_counter
            path = '/org/freedesktop/portal/desktop/session/%s/%s'%(sender_name, token)
            return (path, token)

        def screen_cast_call(method, callback, *args, options={}):
            (request_path, request_token) = new_request_path()
            bus.add_signal_receiver(callback,
                                    'Response',
                                    request_iface,
                                    'org.freedesktop.portal.Desktop',
                                    request_path)
            options['handle_token'] = request_token
            method(*(args + (options, )),
                   dbus_interface=screen_cast_iface)

        def on_gst_message(bus, message):
            type = message.type
            if type == Gst.MessageType.EOS or type == Gst.MessageType.ERROR:
                terminate()

        def play_pipewire_stream(node_id):
            empty_dict = dbus.Dictionary(signature="sv")
            fd_object = portal.OpenPipeWireRemote(session, empty_dict,
                                                  dbus_interface=screen_cast_iface)
            fd = fd_object.take()
            pipeline = Gst.parse_launch('pipewiresrc fd=%d path=%u ! videoconvert ! xvimagesink'%(fd, node_id))
            pipeline.set_state(Gst.State.PLAYING)
            pipeline.get_bus().connect('message', on_gst_message)

        def on_start_response(response, results):
            if response != 0:
                print("Failed to start: %s"%response)
                terminate()
                return

            print("streams:")
            for (node_id, stream_properties) in results['streams']:
                print("stream {}".format(node_id))
                play_pipewire_stream(node_id)

        def on_select_sources_response(response, results):
            if response != 0:
                print("Failed to select sources: %d"%response)
                terminate()
                return

            print("sources selected")
            global session
            screen_cast_call(portal.Start, on_start_response,
                             session, ''')

        def on_create_session_response(response, results):
            if response != 0:
                print("Failed to create session: %d"%response)
                terminate()
                return

            global session
            session = results['session_handle']
            print("session %s created"%session)

            screen_cast_call(portal.SelectSources, on_select_sources_response,
                             session,
                             options={ 'multiple': False,
                                       'types': dbus.UInt32(1|2) })

        portal = bus.get_object('org.freedesktop.portal.Desktop',
                                     '/org/freedesktop/portal/desktop')

        (session_path, session_token) = new_session_path()
        screen_cast_call(portal.CreateSession, on_create_session_response,
                         options={ 'session_handle_token': session_token })

        try:
            loop.run()
        except KeyboardInterrupt:
            terminate()
      '';
      executable = true;
    };
    ".local/bin/playerctl.sh" = {
      source = ./bin/playerctl.sh;
      executable = true;
    };
  };

  xdg = (import ./nix/modules/xdg.nix) {inherit pkgs config hostName;};
}