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

let
  cfg = config.home-manager.users.mainUser.xsession.windowManager.i3;

  backgroundCommand = pkgs.writers.writeDash "background" ''
    ${pkgs.xorg.xrandr}/bin/xrandr | grep " connected" | grep "primary" | \
      ${pkgs.gnused}/bin/sed -E "s/primary //" | \
      ${pkgs.coreutils-full}/bin/cut -d' ' -f 3 | \
      ${pkgs.gnused}/bin/sed -E 's/\+.*$//g' | \
      ${pkgs.coreutils-full}/bin/sort -r | \
      ${pkgs.coreutils-full}/bin/head -n 1 | \
      ${pkgs.gawk}/bin/awk -F 'x' '{print "--width="$1" --height="$2}' | \
      ${pkgs.findutils}/bin/xargs \
        ${pkgs.polygon-art.polygon-art}/bin/rings \
          /dev/shm/background.png && \
        ${pkgs.imagemagick}/bin/convert /dev/shm/background.png \
          -font ${pkgs.ubuntu_font_family}/share/fonts/ubuntu/UbuntuMono-B.ttf \
          -gravity Center -pointsize 30 -annotate 0 '${config.networking.hostName}' \
          /dev/shm/background_with_text.png && \
        ${pkgs.feh}/bin/feh --bg-scale /dev/shm/background_with_text.png
  '';

in
{
  config = lib.mkIf config.components.gui.enable {
    home-manager.users.mainUser = {
      programs.i3status-rust = {
        enable = true;
        bars = {
          my = {
            icons = "awesome5";
            theme = "gruvbox-light";
            # https://github.com/greshake/i3status-rust/blob/v0.22.0/doc/blocks.md
            blocks = [
              {
                block = "cpu";
                interval = 1;
              }
              {
                block = "memory";
                format = "$icon $mem_used_percents ";
              }
              {
                block = "load";
                interval = 1;
                format = "$icon $1m";
              }
              { block = "net"; }
              { block = "sound"; }
              { block = "uptime"; }
              {
                block = "battery";
                interval = 10;
                format = "$icon $percentage $time";
              }
              {
                block = "taskwarrior";
                interval = 60;
                format = " $icon $count.eng(w:3) tasks ";
                format_singular = " $icon 1 task ";
                format_everything_done = "";
                warning_threshold = 10;
                critical_threshold = 20;
                filters = [
                  {
                    name = "active";
                    filter = "+PENDING and ( +ACTIVE or +DUETODAY or +TODAY or +OVERDUE )";
                  }
                ];
              }
              {
                block = "time";
                interval = 60;
                format = " $icon $timestamp.datetime(f:'%Y-%m-%d %R', l:de_DE) ";
              }
              {
                block = "tea_timer";
                format = " $icon {$minutes:$seconds |}";
                done_cmd = "${pkgs.noti}/bin/noti -t 'Timer Finished'";
              }
            ];
          };
        };
      };

      programs.alacritty = {
        enable = true;
        settings = {
          font.size = lib.mkForce 7.0;
        };
      };


      xsession.windowManager.i3 = {
        enable = true;
        extraConfig = ''
          default_border pixel
        '';
        config = {
          modifier = "Mod4";
          terminal = "alacritty";
          focus = {
            followMouse = true;
          };
          startup =
            let
              height = config.configuration.desktop.height;
              width = config.configuration.desktop.width;
            in
            [
              { command = "${pkgs.albert}/bin/albert"; always = true; }
              { command = toString backgroundCommand; always = true; }
              {
                command = toString (pkgs.writers.writeDash "xsettings" ''
                  # to allow sudo commands to access X
                  ${pkgs.xorg.xhost}/bin/xhost +
                  # no shitty pcspkr crap
                  ${pkgs.xorg.xset}/bin/xset -b
                  # no sleeping monitor
                  ${pkgs.xorg.xset}/bin/xset -dpms
                  ${pkgs.xorg.xset}/bin/xset s off
                '');
                always = true;
              }
            ];
          bars = [
            (config.home-manager.users.mainUser.lib.stylix.i3.bar //
              {
                #mode = "hide";
                hiddenState = "hide";
                position = "top";
                workspaceButtons = true;
                workspaceNumbers = true;
                statusCommand = "${pkgs.i3status-rust}/bin/i3status-rs ${config.users.users.mainUser.home}/.config/i3status-rust/config-my.toml";
                fonts.size = 10.0;
                trayOutput = "primary";
              }
            )
          ];

          keybindings = {
            "Print" = "exec ${pkgs.flameshot}/bin/flameshot gui -c -p /share/";
            "${cfg.config.modifier}+Return" = "exec ${cfg.config.terminal}";
            "${cfg.config.modifier}+Shift+q" = "exit";
            "${cfg.config.modifier}+q" = "kill";

            "${cfg.config.modifier}+Left" = "focus left";
            "${cfg.config.modifier}+Down" = "focus down";
            "${cfg.config.modifier}+Up" = "focus up";
            "${cfg.config.modifier}+Right" = "focus right";
            "${cfg.config.modifier}+j" = "focus next";
            "${cfg.config.modifier}+k" = "focus prev";

            "${cfg.config.modifier}+Shift+Left" = "move left";
            "${cfg.config.modifier}+Shift+Down" = "move down";
            "${cfg.config.modifier}+Shift+Up" = "move up";
            "${cfg.config.modifier}+Shift+Right" = "move right";

            "${cfg.config.modifier}+h" = "split h";
            "${cfg.config.modifier}+v" = "split v";
            "${cfg.config.modifier}+f" = "fullscreen toggle";

            "${cfg.config.modifier}+s" = "layout stacking";
            "${cfg.config.modifier}+w" = "layout tabbed";
            "${cfg.config.modifier}+e" = "layout toggle split";

            "${cfg.config.modifier}+t" = "floating toggle";
            #"${cfg.config.modifier}+space" = "focus mode_toggle";

            "${cfg.config.modifier}+b" = "exec ${backgroundCommand}";

            "${cfg.config.modifier}+p" = "focus parent";

            "${cfg.config.modifier}+Shift+minus" = "move scratchpad";
            "${cfg.config.modifier}+minus" = "scratchpad show";

            "${cfg.config.modifier}+1" = "workspace 1";
            "${cfg.config.modifier}+2" = "workspace 2";
            "${cfg.config.modifier}+3" = "workspace 3";
            "${cfg.config.modifier}+4" = "workspace 4";
            "${cfg.config.modifier}+5" = "workspace 5";
            "${cfg.config.modifier}+6" = "workspace 6";
            "${cfg.config.modifier}+7" = "workspace 7";
            "${cfg.config.modifier}+8" = "workspace 8";
            "${cfg.config.modifier}+9" = "workspace 9";
            "${cfg.config.modifier}+0" = "workspace 10";

            "${cfg.config.modifier}+Shift+1" = "move container to workspace number 1";
            "${cfg.config.modifier}+Shift+2" = "move container to workspace number 2";
            "${cfg.config.modifier}+Shift+3" = "move container to workspace number 3";
            "${cfg.config.modifier}+Shift+4" = "move container to workspace number 4";
            "${cfg.config.modifier}+Shift+5" = "move container to workspace number 5";
            "${cfg.config.modifier}+Shift+6" = "move container to workspace number 6";
            "${cfg.config.modifier}+Shift+7" = "move container to workspace number 7";
            "${cfg.config.modifier}+Shift+8" = "move container to workspace number 8";
            "${cfg.config.modifier}+Shift+9" = "move container to workspace number 9";
            "${cfg.config.modifier}+Shift+0" = "move container to workspace number 10";

            "${cfg.config.modifier}+Escape" = "workspace back_and_forth";

            # rename workspace
            "${cfg.config.modifier}+n" = ''
              exec i3-input -F 'rename workspace to "%s"' -P 'New name for this workspace: '
            '';

            # change to named workspace
            "${cfg.config.modifier}+grave" =
              let
                script = pkgs.writers.writeBash "select-workspace" ''
                  set -e
                  set -o pipefail
                  ${pkgs.i3}/bin/i3-msg -t get_workspaces | \
                  ${pkgs.jq}/bin/jq --raw-output '.[] | .name' | \
                  ${pkgs.rofi}/bin/rofi -dmenu -p 'Select Workspace' | \
                  while read line
                  do
                    ${pkgs.i3}/bin/i3-msg workspace "$line"
                  done
                '';
              in
              "exec ${script}";

            "${cfg.config.modifier}+Shift+c" = "reload";
            "${cfg.config.modifier}+Shift+r" = "restart";
            "${cfg.config.modifier}+Shift+e" = "exec i3-nagbar -t warning -m 'Do you want to exit i3?' -b 'Yes' 'i3-msg exit'";

            "${cfg.config.modifier}+r" = "mode resize";

            # multiple monitors
            # autorandr --save docked   # to save setup
            # autorandr --save undocked # to save setup
            # autorandr --change        # automatically detects the setup
            "${cfg.config.modifier}+BackSpace" =
              let
                script = pkgs.writers.writeBash "autorandr" ''
                  ${pkgs.autorandr}/bin/autorandr --change
                  ${backgroundCommand}
                '';
              in
              "exec ${toString script}";

            # like vimperator

            "${cfg.config.modifier}+a" = "exec ${pkgs.i3-easyfocus}/bin/i3-easyfocus";
          };
        };
      };
    };
  };
}