{
  # https://github.com/Alexays/Waybar/wiki/Module:-Hyprland
  # https://www.nerdfonts.com/cheat-sheet

  programs.waybar = {
    enable = true;
    systemd.enable = true;
    settings = {
      mainBar = {
        layer = "bottom";
        position = "top";
        mod = "dock";
        exclusive = true;
        passthrough = false;
        gtk-layer-shell = true;
        height = 0;
        modules-left = [ "hyprland/workspaces" ];

        modules-center = [ "hyprland/window" ];

        modules-right = [
          "tray"
          # "custom/updates"
          "custom/lights"
          "temperature"
          "temperature#gpu"
          "keyboard-state#capslock"
          "keyboard-state#numlock"
          "pulseaudio"
          "pulseaudio#microphone"
          "clock"
          "custom/weather"
        ];

        "hyprland/window" = {
          separate-outputs = true;
          format = { };
        };

        "hyprland/workspaces" = {
          disable-scroll = true;
          all-outputs = true;
          on-click = "activate";
          persistent_workspaces = {
            "*" = 1;
          };
        };

        "custom/weather" = {
          tooltip = true;
          format = { };
          interval = 30;
          exec = "waybar-weather";
          return-type = "json";
        };

        # "custom/updates" = {
        #   tooltip = true;
        #   format = { };
        #   interval = 30;
        #   exec = "waybar-updates";
        #   return-type = "json";
        # };

        "custom/lights" = {
          tooltip = false;
          format = "󱉓";
          # interval = 30;
          on-click = "nix-shell /home/matt/.config/waybar/scripts/hass.nix --run \"python /home/matt/.config/waybar/scripts/hass.py --toggle_light light.bedroom_lights\"";
          # return-type = "json";
        };

        temperature = {
          hwmon-path = "/sys/class/hwmon/hwmon4/temp1_input";
          critical-threshold = 90;
          format-critical = "{temperatureC}°C {icon}";
          format = "{temperatureC}°C {icon}";
          format-icons = [ 
            "" # fa-temperature-empty
            "" # fa-temperature-quarter
            "" # fa-temperature-half
            "" # fa-temperature-three-quarters
            "" # fa-temperature-full
            "" # fa-temperature-high
          ];
          tooltip-format = "CPU: {temperatureC}°C";
        };

        "temperature#gpu" = {
          hwmon-path = "/sys/class/hwmon/hwmon0/temp1_input";
          critical-threshold = 100;
          format-critical = "{temperatureC}°C {icon}";
          format = "{temperatureC}°C {icon}";
          format-icons = [ 
            "" # fa-temperature-empty
            "" # fa-temperature-quarter
            "" # fa-temperature-half
            "" # fa-temperature-three-quarters
            "" # fa-temperature-full
            "" # fa-temperature-high
          ];
          on-click = "lact";
          tooltip-format = "GPU: {temperatureC}°C";
        };

        tray = {
          icon-size = 16;
          spacing = 10;
        };

        clock = {
          format = "{:%I:%M %p}";
          tooltip-format = "<big>{:%Y %B}</big>\n<tt><small>{calendar}</small></tt>";
        };

        pulseaudio = {
          format = "{icon} {volume}%";
          tooltip = false;
          format-muted = " Muted";
          on-click = "pamixer -t";
          on-click-right = "pavucontrol -t 1";
          on-scroll-up = "pamixer -i 5";
          on-scroll-down = "pamixer -d 5";
          scroll-step = 5;
          format-icons = {
            headphone = "󰋋";
            headphone-muted = "󰟎";
            hands-free = "󰋋";
            headset = "󰋋";
            phone = "";
            portable = "󰋋";
            car = "";
            default = [
              ""
              ""
              ""
              ""
            ];
          };
        };

        "pulseaudio#microphone" = {
          format = "{format_source}";
          format-source = "";
          format-source-muted = "";
          on-click = "pamixer --default-source -t";
          on-click-right = "pavucontrol -t 2";
          on-scroll-up = "pamixer --default-source -i 5";
          on-scroll-down = "pamixer --default-source -d 5";
          scroll-step = 5;
        };

        "keyboard-state#capslock" = {
          capslock = true;
          icon-size = 20;
          format = "{icon}";
          format-icons = {
            locked = "󰪛";
            unlocked = " ";
          };
        };

        "keyboard-state#numlock" = {
          numlock = true;
          icon-size = 60;
          format = "{icon}";
          format-icons = {
            locked = "󰎣";
            unlocked = " ";
          };
        };
      };
    };

    # https://catppuccin.com/palette
    style = ''
      @define-color nord0 #2e3440;
      @define-color nord1 #3b4252;
      @define-color nord2 #434c5e;
      @define-color nord3 #4c566a;
      @define-color nord4 #d8dee9;
      @define-color nord5 #e5e9f0;
      @define-color nord6 #eceff4;
      @define-color nord7 #8fbcbb;
      @define-color nord8 #88c0d0;
      @define-color nord9 #81a1c1;
      @define-color nord10 #5e81ac;
      @define-color nord11 #bf616a;
      @define-color nord12 #d08770;
      @define-color nord13 #ebcb8b;
      @define-color nord14 #a3be8c;
      @define-color nord15 #b48ead;
      /*@import "nord.css";*/

      * {
        font-family:
          Jetbrains Mono Nerd Font,
          monospace;
        font-size: 14px;
        min-height: 0;
      }

      #waybar {
        background: transparent;
        color: @nord6;
        margin: 5px 5px;
      }

      #workspaces {
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 1rem;
        background-color: @nord0;
        opacity: 0.6;
        margin-left: 1rem;
      }

      #workspaces button {
        color: @nord10;
        border-radius: 1rem;
        padding: 0.4rem;
      }

      #workspaces button.active {
        color: @nord8;
        border-radius: 1rem;
      }

      #workspaces button:hover {
        color: @nord7;
        border-radius: 1rem;
      }

      #workspaces button.focused {
        color: @nord6;
        background: @nord13;
        border-radius: 1rem;
      }

      #workspaces button.urgent {
        color: @nord0;
        background: @nord6;
        border-radius: 1rem;
      }

      #tooltip {
        background: @nord0;
        border-radius: 1rem;
        border-width: 1rem;
        border-style: solid;
        border-color: @nord0;
      }

      #window {
        color: @nord15;
        background-color: @nord0;
        opacity: 0.6;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 1rem;
        margin-left: 6rem;
        margin-right: 6rem;
      }

      #custom-weather { 
        color: @nord10;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 0rem 1rem 1rem 0rem;
        margin-right: 1rem;
      }

      #clock {
        color: @nord9;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 1rem 0rem 0rem 1rem;
        margin-left: 1rem;
      }

      /* ------------- */

      #pulseaudio.microphone {
        color: @nord8;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 0rem 1rem 1rem 0rem;
      }

      #pulseaudio {
        color: @nord7;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 0;
      }

      #keyboard-state.numlock {
        color: @nord8;
        background-color: @nord0;
        padding: 0.5rem;
        margin: 5px 0;
        border-radius: 0;
        font-size: 10rem;
      }

      #keyboard-state.capslock {
        color: @nord9;
        background-color: @nord0;
        padding: 0.5rem;
        margin: 5px 0;
        border-radius: 0;
        font-size: 18px;
      }

      #temperature.gpu {
        color: @nord10;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 0;
      }

      #temperature {
        color: @nord9;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 0;
      }

      #custom-updates {
        color: @nord8;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 1rem 0rem 0rem 1rem;
        margin-left: 1rem;
      }

      #custom-lights {
        color: @nord8;
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        border-radius: 1rem 0rem 0rem 1rem;
      }

      /* ------------- */

      #tray {
        background-color: @nord0;
        padding: 0.5rem 1rem;
        margin: 5px 0;
        margin-right: 1rem;
        border-radius: 1rem;
      }
    '';
  };
}