{ lib, pkgs, ... }:

let
  inherit (lib) singleton;

  osu-backgrounds = pkgs.callPackage ../packages/osu-backgrounds.nix { };
in
{
  home-manager.sharedModules = singleton {
    home = {
      packages = with pkgs; [
        feh
        xclip
      ];

      file.".xinitrc" = {
        executable = true;
        text = # bash
          ''
            #!/usr/bin/env sh

            export XDG_SESSION_TYPE=x11
            export GDK_BACKEND=x11
            export XDG_CURRENT_DESKTOP=dwm
            export GTK_IM_MODULE=fcitx
            export QT_IM_MODULE=fcitx
            export XMODIFIERS=@im=fcitx
            export SDL_IM_MODULE=fcitx
            export GLFW_IM_MODULE=ibus

            xrdb -merge ~/.Xresources
            xset r rate 300 50
            feh --bg-fill "$(fish -c 'random choice (fd . ${osu-backgrounds}/2024-07-15-Aerial-Antics-Art-Contest-All-Entries --follow -e jpg -e png)')" &

            while true; do
              xsetroot -name "$(date +"%F %R")"
              sleep 1m
            done &

            picom --daemon

            fcitx5 &

            while true; do
              dwm >/dev/null 2>&1
            done
          '';
      };
    };

    services = {
      picom = rec {
        enable = true;
        backend = "glx";

        vSync = true;
        fade = true;
        shadow = true;

        fadeDelta = 5;

        fadeExclude = [
          "window_type = 'menu'"
          "window_type = 'dropdown_menu'"
          "window_type = 'popup_menu'"
          "window_type = 'tooltip'"
        ];

        shadowExclude = fadeExclude;

        settings = {
          blur = {
            method = "dual_kawase";
            size = 10;
          };
        };
      };

      dunst = {
        enable = true;

        iconTheme = {
          package = pkgs.papirus-icon-theme;
          name = "Papirus";
        };

        settings = {
          global = {
            geometry = "1870x5-25+45";
            width = 350;
            separator_height = 5;
            padding = 24;
            horizontal_padding = 24;
            frame_width = 3;
            idle_threshold = 120;
            alignment = "center";
            word_wrap = "yes";
            transparency = 5;
            format = "<b>%s</b>: %b";
            markup = "full";
            min_icon_size = 32;
            max_icon_size = 128;
          };
        };
      };
    };
  };

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

      windowManager.dwm = {
        enable = true;

        package = pkgs.dwm.override {
          conf = # c
            ''
              #include <X11/XF86keysym.h>

              static const unsigned int borderpx = 0;
              static const unsigned int snap = 32;
              static const int showbar = 1;
              static const int topbar = 1;
              static const char *fonts[] = { "monospace:size=10" };
              static const char col_gray1[] = "#252525";
              static const char col_gray2[] = "#3b3b3b";
              static const char col_gray3[] = "#b9b9b9";
              static const char col_gray4[] = "#dedede";
              static const char col_cyan[] = "#005577";
              static const char *colors[][3] = {
                [SchemeNorm] = { col_gray3, col_gray1, col_gray2 },
                [SchemeSel] = { col_gray4, col_gray1, col_gray3 },
              };

              static const unsigned int baralpha = 0xd0;

              static const unsigned int alphas[][3] = {
                [SchemeNorm] = { OPAQUE, baralpha, baralpha },
                [SchemeSel] = { OPAQUE, baralpha, baralpha },
              };

              static const char *tags[] = { "一", "二", "三" };

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

              static const float mfact = 0.55;
              static const int nmaster = 1;
              static const int resizehints = 1;
              static const int lockfullscreen = 1;

              static const Layout layouts[] = {
                { "[]=", tile },
              };

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

              static char dmenumon[2] = "0";
              static const char *dmenucmd[] = { "rofi", "-show", "drun" };
              static const char *termcmd[] = { "kitty", NULL };
              static const char *brighter[] = { "brightnessctl", "set", "5%+", NULL };
              static const char *dimmer[] = { "brightnessctl", "set", "5%-", NULL };
              static const char *up_vol[] = { "wpctl", "set-volume", "@DEFAULT_AUDIO_SINK@", "5%+", NULL };
              static const char *down_vol[] = { "wpctl", "set-volume", "@DEFAULT_AUDIO_SINK@", "5%-", NULL };
              static const char *mute_vol[] = { "wpctl", "set-mute", "@DEFAULT_AUDIO_SINK@", "toggle", NULL };

              static const Key keys[] = {
                { 0, XF86XK_AudioMute, spawn, {.v = mute_vol } },
                { 0, XF86XK_AudioLowerVolume, spawn, {.v = down_vol } },
                { 0, XF86XK_AudioRaiseVolume, spawn, {.v = up_vol } },
                { 0, XF86XK_MonBrightnessDown, spawn, {.v = dimmer } },
                { 0, XF86XK_MonBrightnessUp, spawn, {.v = brighter } },
                { MODKEY, XK_p, spawn, {.v = dmenucmd } },
                { MODKEY, XK_b, togglebar, {0} },
                { MODKEY, XK_j, focusstack, {.i = +1 } },
                { MODKEY, XK_k, focusstack, {.i = -1 } },
                { MODKEY, XK_h, setmfact, {.f = -0.05} },
                { MODKEY, XK_l, setmfact, {.f = +0.05} },
                { MODKEY, XK_Return, zoom, {0} },
                { MODKEY, XK_comma, focusmon, {.i = -1 } },
                { MODKEY, XK_period, focusmon, {.i = +1 } },
                { MODKEY, XK_1, viewprev, {0} },
                { MODKEY, XK_2, viewnext, {0} },
                { MODKEY|ShiftMask, XK_1, tagtoprev, {0} },
                { MODKEY|ShiftMask, XK_2, tagtonext, {0} },
                { MODKEY|ShiftMask, XK_Return, spawn, {.v = termcmd } },
                { MODKEY|ShiftMask, XK_c, killclient, {0} },
                { MODKEY|ShiftMask, XK_comma, tagmon, {.i = -1 } },
                { MODKEY|ShiftMask, XK_period, tagmon, {.i = +1 } },
                { MODKEY|ShiftMask, XK_q, quit, {0} },
              };

              static const Button buttons[] = {
                { ClkClientWin, MODKEY, Button1, movemouse, {0} },
                { ClkClientWin, MODKEY, Button2, togglefloating, {0} },
                { ClkClientWin, MODKEY, Button3, resizemouse, {0} },
              };
            '';

          patches = [
            ../assets/dwm-actualfullscreen.patch
            ../assets/dwm-adjacenttag.patch

            (pkgs.fetchpatch {
              url = "https://dwm.suckless.org/patches/hide_vacant_tags/dwm-hide_vacant_tags-6.4.diff";
              hash = "sha256-GIbRW0Inwbp99rsKLfIDGvPwZ3pqihROMBp5vFlHx5Q=";
            })

            (pkgs.fetchpatch {
              url = "https://dwm.suckless.org/patches/alwayscenter/dwm-alwayscenter-20200625-f04cac6.diff";
              hash = "sha256-xQEwrNphaLOkhX3ER09sRPB3EEvxC73oNWMVkqo4iSY=";
            })

            (pkgs.fetchpatch {
              url = "https://dwm.suckless.org/patches/alpha/dwm-alpha-20230401-348f655.diff";
              hash = "sha256-ZhuqyDpY+nQQgrjniQ9DNheUgE9o/MUXKaJYRU3Uyl4=";
            })
          ];
        };
      };

    };

    libinput = {
      touchpad = {
        naturalScrolling = true;
        accelProfile = "flat";
      };

      mouse = {
        accelProfile = "flat";
      };
    };
  };
}