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{ config, lib, pkgs, ... }:
let
  inherit (config.lib) depot;

  mod = "Mod4";
  solarized = import ../common/solarized.nix;
  # TODO pull this out into lib
  emacsclient = eval: pkgs.writeShellScript "emacsclient-eval" ''
    msg=$(emacsclient --eval '${eval}' 2>&1)
    echo "''${msg:1:-1}"
  '';

  i3status-conf = pkgs.writeText "i3status.conf" ''
    general {
        output_format = i3bar
        colors = true
        color_good = "#859900"

        interval = 1
    }

    order += "external_script current_task"
    order += "external_script inbox"
    order += "spotify"
    order += "weather_owm"
    order += "volume_status"
    order += "wireless ${config.system.machine.wirelessInterface}"
    # order += "ethernet enp3s0f0"
    order += "cpu_usage"
    ${lib.optionalString (!isNull config.system.machine.battery) ''
      order += "battery ${toString config.system.machine.battery}"
    ''}
    # order += "volume master"
    order += "time"
    order += "tztime utc"

    mpd {
        format = "%artist - %album - %title"
    }

    wireless ${config.system.machine.wirelessInterface} {
        format_up = "W: (%quality - %essid - %bitrate) %ip"
        format_down = "W: -"
    }

    ethernet enp3s0f0 {
        format_up = "E: %ip"
        format_down = "E: -"
    }

    battery ${toString config.system.machine.battery} {
        format = "%status %percentage (%remaining)"
        path = "/sys/class/power_supply/BAT%d/uevent"
        low_threshold = 10
    }

    cpu_usage {
        format = "CPU: %usage"
    }

    load {
        format = "%5min"
    }

    time {
        format = "    %a %h %d ⌚   %I:%M     "
    }

    spotify {
        color_playing = "#fdf6e3"
        color_paused = "#93a1a1"
        format_stopped = ""
        format_down = ""
        format = "{title} - {artist} ({album})"
    }

    external_script inbox {
        script_path = '${emacsclient "(aspen/num-inbox-items-message)"}'
        format = 'Inbox: {output}'
        cache_timeout = 120
        color = "#93a1a1"
    }

    external_script current_task {
        script_path = '${
          emacsclient "(aspen/org-current-clocked-in-task-message)"
        }'
        # format = '{output}'
        cache_timeout = 60
        color = "#93a1a1"
    }

    tztime utc {
        timezone = "UTC"
        format = "    %H·%M    "
    }

    volume_status {
        format = "☊ {percentage}"
        format_muted = "☊ X"
        # device = "default"
        # mixer_idx = 0
    }

    weather_owm {
        api_key = '@owmApiKey@'
        unit_temperature = 'c'
        format = '{icon} {temperature}[ {rain}]'
    }
  '';

  i3status-command = pkgs.writeShellScript "i3status.sh" ''
    sed -s "s/@owmApiKey@/$(pass owm-api-key)/" \
      < ${i3status-conf} \
      > /tmp/i3status.conf
    py3status -c /tmp/i3status.conf
  '';

  inherit (builtins) map;
  inherit (lib) mkMerge range;
in
{
  options = with lib; {
    system.machine = {
      wirelessInterface = mkOption {
        description = ''
          Name of the primary wireless interface. Used by i3status, etc.
        '';
        default = "wlp3s0";
        type = types.str;
      };

      i3FontSize = mkOption {
        description = "Font size to use in i3 window decorations etc.";
        default = 6;
        type = types.int;
      };

      battery = mkOption {
        description = "Battery index for this system's battery";
        default = 0;
        type = types.nullOr types.int;
      };
    };
  };

  config =
    let
      fontName = "MesloLGSDZ";
      fontSize = config.system.machine.i3FontSize;
      fonts = {
        names = [ fontName ];
        size = fontSize * 1.0;
      };
      decorationFont = "${fontName} ${toString fontSize}";
    in
    {
      home.packages = with pkgs; [
        rofi
        rofi-pass
        depot.users.aspen.pkgs.py3status
        i3lock
        i3status
        dconf # for gtk

        # Screenshots
        maim

        # GIFs
        picom
        peek

        (pkgs.writeShellScriptBin "lock" ''
          playerctl pause
          ${pkgs.i3lock}/bin/i3lock -c 222222
        '')
      ];

      xsession.scriptPath = ".xsession";

      xsession.windowManager.i3 = {
        enable = true;
        config = {
          modifier = mod;
          keybindings =
            mkMerge (
              (map
                (n: {
                  "${mod}+${toString n}" =
                    "workspace ${toString n}";
                  "${mod}+Shift+${toString n}" =
                    "move container to workspace ${toString n}";
                })
                (range 0 9))
              ++ [
                (rec {
                  "${mod}+h" = "focus left";
                  "${mod}+j" = "focus down";
                  "${mod}+k" = "focus up";
                  "${mod}+l" = "focus right";
                  "${mod}+semicolon" = "focus parent";

                  "${mod}+Shift+h" = "move left";
                  "${mod}+Shift+j" = "move down";
                  "${mod}+Shift+k" = "move up";
                  "${mod}+Shift+l" = "move right";

                  "${mod}+Shift+x" = "kill";

                  "${mod}+Return" = "exec alacritty";

                  "${mod}+Shift+s" = "split h";
                  "${mod}+Shift+v" = "split v";
                  "${mod}+e" = "layout toggle split";
                  "${mod}+w" = "layout tabbed";
                  "${mod}+s" = "layout stacking";

                  "${mod}+f" = "fullscreen";

                  "${mod}+Shift+r" = "restart";

                  "${mod}+r" = "mode resize";

                  # Marks
                  "${mod}+Shift+m" = ''exec i3-input -F "mark %s" -l 1 -P 'Mark: ' '';
                  "${mod}+m" = ''exec i3-input -F '[con_mark="%s"] focus' -l 1 -P 'Go to: ' '';

                  # Screenshots
                  "${mod}+q" = "exec \"maim | xclip -selection clipboard -t image/png\"";
                  "${mod}+Shift+q" = "exec \"maim -s | xclip -selection clipboard -t image/png\"";
                  "${mod}+Ctrl+q" = "exec ${pkgs.writeShellScript "peek.sh" ''
              ${pkgs.picom}/bin/picom &
              picom_pid=$!
              ${pkgs.peek}/bin/peek || true
              kill -SIGINT $picom_pid
            ''}";

                  # Launching applications
                  "${mod}+u" = "exec ${pkgs.writeShellScript "rofi" ''
              rofi \
                -modi 'combi' \
                -combi-modi "window,drun,ssh,run" \
                -font '${decorationFont}' \
                -show combi
            ''}";

                  # Passwords
                  "${mod}+p" = "exec rofi-pass -font '${decorationFont}'";

                  # Edit current buffer
                  "${mod}+v" = "exec edit-input";

                  # Media
                  "XF86AudioPlay" = "exec playerctl -p spotify play-pause";
                  "XF86AudioNext" = "exec playerctl -p spotify next";
                  "XF86AudioPrev" = "exec playerctl -p spotify previous";
                  "XF86AudioRaiseVolume" = "exec pulseaudio-ctl up";
                  "XF86AudioLowerVolume" = "exec pulseaudio-ctl down";
                  "XF86AudioMute" = "exec pulseaudio-ctl mute";

                  # Lock
                  Pause = "exec lock";

                  # Brightness
                  "XF86MonBrightnessDown" = "exec ${pkgs.brightnessctl}/bin/brightnessctl -q s 5%-";
                  "XF86MonBrightnessUp" = "exec ${pkgs.brightnessctl}/bin/brightnessctl -q s 5%+";

                  # Sleep/hibernate
                  # "${mod}+Escape" = "exec systemctl suspend";
                  # "${mod}+Shift+Escape" = "exec systemctl hibernate";

                  # Scratch buffer
                  "${mod}+minus" = "scratchpad show";
                  "${mod}+Shift+minus" = "move scratchpad";
                  "${mod}+space" = "focus mode_toggle";
                  "${mod}+Shift+space" = "floating toggle";

                  # Screen Layout
                  "${mod}+Shift+t" = "exec xrandr --auto";

                  # Notifications
                  "${mod}+Shift+n" = "exec killall -SIGUSR1 .dunst-wrapped";
                  "${mod}+n" = "exec killall -SIGUSR2 .dunst-wrapped";
                  "Control+space" = "exec ${pkgs.dunst}/bin/dunstctl close";
                  "Control+Shift+space" = "exec ${pkgs.dunst}/bin/dunstctl close-all";
                  "Control+grave" = "exec ${pkgs.dunst}/bin/dunstctl history-pop";
                  "Control+Shift+period" = "exec ${pkgs.dunst}/bin/dunstctl action";
                })
              ]
            );

          inherit fonts;

          colors = with solarized; rec {
            focused = {
              border = base01;
              background = base01;
              text = base3;
              indicator = red;
              childBorder = base02;
            };
            focusedInactive = focused // {
              border = base03;
              background = base03;
              # text = base1;
            };
            unfocused = focusedInactive;
            background = base03;
          };

          modes.resize = {
            l = "resize shrink width 5 px or 5 ppt";
            k = "resize grow height 5 px or 5 ppt";
            j = "resize shrink height 5 px or 5 ppt";
            h = "resize grow width 5 px or 5 ppt";

            Return = "mode \"default\"";
          };

          bars = [{
            statusCommand = "${i3status-command}";
            inherit fonts;
            position = "top";
            colors = with solarized; rec {
              background = base03;
              statusline = base3;
              separator = base1;
              activeWorkspace = {
                border = base03;
                background = base1;
                text = base3;
              };
              focusedWorkspace = activeWorkspace;
              inactiveWorkspace = activeWorkspace // {
                background = base01;
              };
              urgentWorkspace = activeWorkspace // {
                background = red;
              };
            };
          }];

          window.titlebar = true;
        };
      };

      services.dunst = {
        enable = true;
        settings = with solarized; {
          global = {
            font = "MesloLGSDZ ${toString (config.system.machine.i3FontSize * 1.5)}";
            allow_markup = true;
            format = "<b>%s</b>\n%b";
            sort = true;
            alignment = "left";
            geometry = "600x15-40+40";
            idle_threshold = 120;
            separator_color = "frame";
            separator_height = 1;
            word_wrap = true;
            padding = 8;
            horizontal_padding = 8;
            max_icon_size = 45;
          };

          frame = {
            width = 0;
            color = "#aaaaaa";
          };

          urgency_low = {
            background = base03;
            foreground = base3;
            timeout = 5;
          };

          urgency_normal = {
            background = base02;
            foreground = base3;
            timeout = 7;
          };

          urgency_critical = {
            background = red;
            foreground = base3;
            timeout = 0;
          };
        };
      };

      gtk = {
        enable = true;
        iconTheme.name = "Adwaita";
        theme.name = "Adwaita";
      };
    };
}