{
  config,
  lib,
  pkgs,
  hostName,
  fonts,
  scheme,
  accentColour ? "base07",
  ...
}: {
  systemd.user.targets.tray.Unit = {
    Description = "Home Manager System Tray";
    Requires = ["graphical-session-pre.target"];
  };
  programs.waybar = {
    enable = true;
    systemd = {
      enable = true;
      target = "sway-session.target";
    };
    settings = rec {
      main = {
        name = "main";
        layer = "top";
        position = "top";
        # Layout
        "modules-left" = ["mpris"];
        "modules-center" = ["sway/workspaces"];
        "modules-right" = [
          "custom/notification"
          "pulseaudio"
          "network"
          "bluetooth"
          "clock#calendar"
          "clock"
          "backlight"
          "battery"
          "custom/weather"
          "tray"
        ];
        # Module config
        "sway/workspaces" = {
          format = "{icon}";
          format-icons = {
            "1" = "󰫃 ";
            "2" = "󰫄 ";
            "3" = "󰫅 ";
            "4" = "󰫆 ";
            "5" = "󰫇 ";
            "6" = "󰫈 ";
            default = "󰋙 ";
            urgent = "󰁡 ";
          };
          # show-special = false;
          # sort-by-number = true;
          all-outputs = false;
          persistent-workspaces = {
            "1" = [];
            "2" = [];
            "3" = [];
            "4" = [];
            "5" = [];
            "6" = [];
          };
        };
        "sway/window" = {
          "format" = "{title}";
          "max-length" = 50;
          "rewrite" = {
            "(.*) - GNU Emacs at (.*)" = "  $1 [$2]";
            "(Alacritty.*)" = "  $1";
            "(.*) - mpv" = "󰦟  $1";
            "swayimg: (.*)" = "󰋩  $1";
            "(btm)" = "  Resource Usage [$1]";
            "(cava)" = "󰝚  Music Visualiser [$1]";
            "(.*) - Thunar" = "󰝰  $1";
            "Mozilla Firefox" = "󰈹  $1";
            "(.*) — Mozilla Firefox" = "󰈹  $1";
            "Nyxt - (.*)" = "󰀹  $1";
            "(.*) - Chromium" = "󰊯  $1";
            "((?:.*)WebCord.*)" = "󰙯  $1";
            "(Signal.*)" = "󰭹  $1";
            "([Ss]team)" = "󰓓  $1";
            "(Prism Launcher.*)" = "󰍳  Minecraft ($1)";
            "(X2Go Client)" = "󰢹  $1";
            "(NoMachine|Nxplayer.bin) (.*)" = "󰢹  $1 $2";
          };
        };
        mpris = {
          "format" = "{status_icon} {player_icon} {artist} - {title}";
          "tooltip-format" = "{player_icon} ({player}) {dynamic}";
          "title-len" = 64;
          "interval" = 1;
          "dynamic-order" = [
            "album"
            "artist"
            "title"
            "position"
            "length"
          ];
          "player-icons" = {
            "default" = "󰲸 ";
            "emms" = " ";
            "firefox" = "󰈹 ";
            "mpv" = "󰦟 ";
          };
          "status-icons" = {
            "playing" = "󰐊";
            "paused" = "󰏤";
            "stopped" = "󰓛";
          };
          "ignored-players" = [];
        };
        pulseaudio = {
          scroll-step = 5;
          format = "{format_source}{icon}{volume}%";
          format-muted = "{format_source} 󰝟 ";
          format-source = "󰍬 ";
          format-source-muted = "󰍭 ";
          format-icons = {
            car = "󰄍 ";
            default = ["󰕿 " "󰖀 " "󰕾 "];
            hands-free = "󰥰 ";
            headset = "󰋎 ";
            phone = "󰏲 ";
            portable = "󰏳 ";
            headphone = "󰋋 ";
          };
          on-click = "${pkgs.pavucontrol}/bin/pavucontrol";
          on-click-right = "${pkgs.pamixer}/bin/pamixer -t";
          on-scroll-up = "${pkgs.pamixer}/bin/pamixer -i 5";
          on-scroll-down = "${pkgs.pamixer}/bin/pamixer -d 5";
        };
        disk = {
          format = "󰋊 {percentage_used}%";
          path = config.home.homeDirectory;
        };
        cpu = {
          format = "󰻠 {usage}%";
          tooltip = false;
        };
        memory = {format = "󰍛 {}%";};
        temperature = {
          critical-threshold = 80;
          format = "{icon} {temperatureC}°C";
          format-icons = ["󱃃" "󰔏" "󱃂"];
        };
        network = {
          format-icons = ["󰤟 " "󰤢 " "󰤥 " "󰤨 "];
          format-wifi = "{icon}";
          format-ethernet = "󰈁 ";
          tooltip-format = "{essid} ({signalStrength}%)";
          format-linked = "󰈂 ";
          format-disconnected = "󰈂 ";
        };
        bluetooth = {
          format = "󰂯";
          format-disabled = "󰂲";
          format-off = "󰂲";
          format-on = "󰂯";
          format-connected = "󰂱";
          tooltip-format = "{status} | {device_alias}";
          on-click = "${pkgs.bluez}/bin/bluetoothctl power on";
          on-click-right = "${pkgs.bluez}/bin/bluetoothctl power off";
        };
        "clock#calendar" = {
          # format = "{:󰃭 %Y-%m-%d}";
          format = "{:%Y-%m-%d}"; # TEMP, see https://github.com/Alexays/Waybar/issues/3021
          tooltip-format = "<tt><small>{calendar}</small></tt>";
          calendar = {
            mode = "month";
            mode-mon-col = 3;
            weeks-pos = "left";
            on-scroll = 1;
            on-click-right = "mode";
            format = {
              months = "<span color='#ffead3'><b>{}</b></span>";
              days = "<span color='#ecc6d9'><b>{}</b></span>";
              weeks = "<span color='#99ffdd'><b>W{}</b></span>";
              weekdays = "<span color='#ffcc66'><b>{}</b></span>";
              today = "<span color='#ff6699'><b><u>{}</u></b></span>";
            };
          };
          actions = {
            on-click-right = "mode";
            on-scroll-up = "shift_up";
            on-scroll-down = "shift_down";
          };
        };
        clock = {
          # format = "{:󰥔 %R}";
          format = "{:%R}"; # TEMP, see https://github.com/Alexays/Waybar/issues/3021
        };
        backlight = {
          format = "{icon}";
          tooltip-format = "{percent}%";
          format-icons = [" " " " " " " " " " " " " " " " " "];
        };
        battery = {
          states = {
            warning = 30;
            critical = 20;
          };
          format = "{icon}";
          format-charging = "󰂄 ";
          format-plugged = "󰚥 ";
          tooltip-format = "{capacity}% {time}";
          format-icons = ["󱃍 " "󰁺 " "󰁻 " "󰁼 " "󰁽 " "󰁾 " "󰁿 " "󰂀 " "󰂁 " "󰂂 " "󰁹 "];
        };
        "custom/notification" = let
          swaync = pkgs.swaynotificationcenter;
        in {
          "tooltip" = false;
          "format" = "{icon}{}";
          "format-icons" = {
            "notification" = "󱅫 ";
            "none" = "󰂚 ";
            "dnd-notification" = "󰅸 ";
            "dnd-none" = "󰂜 ";
            "inhibited-notification" = "󰅸 ";
            "inhibited-none" = "󰂜 ";
            "dnd-inhibited-notification" = "󰅸 ";
            "dnd-inhibited-none" = "󰂜 ";
          };
          "return-type" = "json";
          "exec-if" = "which ${swaync}/bin/swaync-client";
          "exec" = "${swaync}/bin/swaync-client -swb";
          "on-click" = "${swaync}/bin/swaync-client -t -sw";
          "on-click-right" = "${swaync}/bin/swaync-client -d -sw";
          "escape" = true;
        };
        "custom/weather" = let
          date-format = "%Y-%m-%d";
          custom-indicator = "{ICON}{temp_C}({FeelsLikeC})";
        in {
          "format" = "{}°";
          "tooltip" = true;
          "interval" = 900; # Every 15 minutes
          "exec" = ''${pkgs.wttrbar}/bin/wttrbar --location Didcot --date-format "${date-format}" --custom-indicator "${custom-indicator}"'';
          "return-type" = "json";
        };
        tray = {
          icon-size = builtins.floor fonts.sizes.popups;
          show-passive-items = true;
          spacing = 5;
        };
      };
      # TEMP FIX
      alt = lib.mkIf (hostName == "Vanguard") {
        inherit (main) layer position "sway/workspaces";
        name = "alt";
        "modules-left" = [];
        "modules-center" = ["sway/workspaces"];
        "modules-right" = [];
      };
    };
    style = with scheme.withHashtag; let
      accent = scheme.withHashtag.${accentColour};
    in ''
      * {
          all: unset;
          font-size: ${toString fonts.sizes.popups};
          font-family: ${fonts.monospace.name};
      }

      window {
          background: transparent;
      }

      window > box {
          color: ${base05};
          background: alpha(${base00}, 0.8);
          margin: 10px 10px 0px;
          padding: 0px;
          border: 1px solid ${accent};
          border-radius: 10px;
      }

      tooltip {
          background: alpha(${base00}, 0.8);
          border: 1px solid ${accent};
          border-radius: 10px;
      }

      tooltip label {
          color: ${base05};
          border: none;
          padding: 5px;
          margin: 0px;
      }

      #workspaces,
      #window,
      #mpris,
      #pulseaudio,
      #network,
      #bluetooth,
      #backlight,
      #battery,
      #clock,
      #custom-notification,
      #custom-weather,
      #tray {
          margin: 0px;
          padding: 1px 5px;
      }

      #workspaces,
      #window,
      #mpris,
      #tray,
      #backlight,
      #battery,
      #custom-weather {
          color: ${base05};
      }

      #workspaces button {
          background: transparent;
          color: ${base05};
          margin: 0px;
          padding: 0px 5px;
      }
      #workspaces button.persistent {
          color: ${base03};
      }
      #workspaces button.focused {
          color: ${accent};
      }
      #workspaces button.urgent {
          color: ${base09};
      }

      #custom-notification {
          color: ${base08};
      }
      #pulseaudio {
          color: ${base09};
      }
      #network {
          color: ${base0A};
      }
      #bluetooth {
          color: ${base0B};
      }
      #clock.calendar {
          color: ${base0C};
      }
      #clock {
          color: ${base0D};
      }
    '';
  };
}