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{
  config,
  lib,
  pkgs,
  ...
}:
with lib; let
  cfg = config.nixfiles.modules.dwm;
in {
  options.nixfiles.modules.dwm.enable = mkEnableOption "dwm";

  config = mkIf cfg.enable {
    nixfiles.modules.x11.enable = true;

    hm.xsession = {
      enable = true;

      windowManager.command = let
        pkg = pkgs.dwm.override {
          conf = let
            font = with config.fontScheme.monospaceFont; "${family}:size=${toString size}";
            colour = config.colourScheme;
          in ''
            static const unsigned int borderpx = 1;
            static const unsigned int snap = 32;
            static const int showbar = 1;
            static const int topbar = 1;

            static const char *fonts[] = {
              "${font}"
            };

            static const char *colors[][3] = {
              [SchemeNorm] = {
                "${colour.white}",
                "${colour.black}",
                "${colour.black}",
              },
              [SchemeSel] = {
                "${colour.black}",
                "${colour.white}",
                "${colour.white}",
              },
            };

            static const char *tags[] = {
              "1",
              "2",
              "3",
              "4",
              "5",
              "6",
              "7",
              "8",
              "9"
            };

            static const Rule rules[] = {
              { "Emacs", NULL, NULL, 1 << 0, 0, -1 },
            };

            static const float mfact = 0.666;
            static const int nmaster = 1;
            static const int resizehints = 0;
            static const int lockfullscreen = 1;

            static const Layout layouts[] = {
              { "[]=", tile },
              { "><>", NULL },
              { "[M]", monocle },
            };

            #define MODKEY Mod4Mask
            #define TAGKEYS(KEY,TAG) \
              { MODKEY,                       KEY, view,       { .ui = 1 << TAG } }, \
              { MODKEY|ControlMask,           KEY, toggleview, { .ui = 1 << TAG } }, \
              { MODKEY|ShiftMask,             KEY, tag,        { .ui = 1 << TAG } }, \
              { MODKEY|ControlMask|ShiftMask, KEY, toggletag,  { .ui = 1 << TAG } },

            static char dmenumon[2] = "0";
            static const char *dmenucmd[] = {
              "${pkgs.dmenu}/bin/dmenu_run",
              "-m", dmenumon,
              "-fn", "${font}",
              "-nb", "${colour.black}",
              "-nf", "${colour.white}",
              "-sb", "${colour.white}",
              "-sf", "${colour.black}",
              NULL,
            };
            static const char *termcmd[] = {
              "${pkgs.alacritty}/bin/alacritty",
              NULL,
            };

            static const Key keys[] = {
              { MODKEY,           XK_x,      spawn,          {.v = dmenucmd } },
              { MODKEY,           XK_Return, spawn,          {.v = termcmd } },
              { MODKEY,           XK_b,      togglebar,      {0} },
              { MODKEY,           XK_j,      focusstack,     {.i = +1 } },
              { MODKEY,           XK_k,      focusstack,     {.i = -1 } },
              { MODKEY|ShiftMask, XK_k,      incnmaster,     {.i = +1 } },
              { MODKEY|ShiftMask, XK_j,      incnmaster,     {.i = -1 } },
              { MODKEY,           XK_comma,  setmfact,       {.f = -0.05} },
              { MODKEY,           XK_period, setmfact,       {.f = +0.05} },
              { MODKEY,           XK_p,      zoom,           {0} },
              { MODKEY,           XK_Tab,    view,           {0} },
              { MODKEY,           XK_d,      killclient,     {0} },
              { MODKEY,           XK_t,      setlayout,      {.v = &layouts[0]} },
              { MODKEY,           XK_m,      setlayout,      {.v = &layouts[1]} },
              { MODKEY,           XK_f,      setlayout,      {.v = &layouts[2]} },
              { MODKEY,           XK_o,      togglefloating, {0} },
              { MODKEY,           XK_0,      view,           {.ui = ~0 } },
              { MODKEY|ShiftMask, XK_0,      tag,            {.ui = ~0 } },
              { MODKEY,           XK_h,      focusmon,       {.i = -1 } },
              { MODKEY,           XK_l,      focusmon,       {.i = +1 } },
              { MODKEY|ShiftMask, XK_h,      tagmon,         {.i = -1 } },
              { MODKEY|ShiftMask, XK_l,      tagmon,         {.i = +1 } },
              TAGKEYS(            XK_1,                      0)
              TAGKEYS(            XK_2,                      1)
              TAGKEYS(            XK_3,                      2)
              TAGKEYS(            XK_4,                      3)
              TAGKEYS(            XK_5,                      4)
              TAGKEYS(            XK_6,                      5)
              TAGKEYS(            XK_7,                      6)
              TAGKEYS(            XK_8,                      7)
              TAGKEYS(            XK_9,                      8)
              { MODKEY|ShiftMask, XK_q,      quit,           {0} },
            };

            static const Button buttons[] = {
              { ClkLtSymbol,   0,      Button1, setlayout,      {0} },
              { ClkLtSymbol,   0,      Button3, setlayout,      {.v = &layouts[2]} },
              { ClkWinTitle,   0,      Button2, zoom,           {0} },
              { ClkStatusText, 0,      Button2, spawn,          {.v = termcmd } },
              { ClkClientWin,  MODKEY, Button1, movemouse,      {0} },
              { ClkClientWin,  MODKEY, Button2, togglefloating, {0} },
              { ClkClientWin,  MODKEY, Button3, resizemouse,    {0} },
              { ClkTagBar,     0,      Button1, view,           {0} },
              { ClkTagBar,     0,      Button3, toggleview,     {0} },
              { ClkTagBar,     MODKEY, Button1, tag,            {0} },
              { ClkTagBar,     MODKEY, Button3, toggletag,      {0} },
            };
          '';
        };
      in "${pkg}/bin/dwm";
    };

    hm.services.dwm-status = {
      enable = true;
      # package = pkgs.dwm-status.override {
      #   enableAlsaUtils = false;
      # };
      order = ["audio" "backlight" "battery" "cpu_load" "network" "time"];
    };

    services.xserver.displayManager.startx.enable = true;
  };
}