# Fuzzel — launcher, dmenu renderer for the menu system, themed from
# theme-state.json like every other surface. Also home of nomarchy-menu,
# the dispatcher script all menu modules grow out of.
#
# Per-theme identity: themes/<slug>/fuzzel.ini is a whole-swap (like
# waybar.css) — it replaces the generated config entirely, probed at
# eval time.
{ config, lib, pkgs, ... }:

let
  cfg = config.nomarchy;
  t = cfg.theme;
  c = t.colors;

  # Per-theme override probe (same convention as waybar.nix).
  iniOverride = cfg.themesDir + "/${t.slug}/fuzzel.ini";
  hasIniOverride = builtins.pathExists iniOverride;

  # fuzzel.ini colors are rrggbbaa, no leading #.
  hexa = color: alpha: "${lib.removePrefix "#" color}${alpha}";

  nomarchy-menu = pkgs.writeShellScriptBin "nomarchy-menu" ''
    # Nomarchy menu dispatcher — thin presentation layer over
    # `fuzzel --dmenu`; actions delegate to nomarchy-theme-sync,
    # systemctl, hyprctl and friends. Icons are nf-md glyphs (any
    # shipped Nerd Font carries them). `nomarchy-menu` with no
    # argument shows the module picker.

    urlencode() {
      local s="$1" out="" ch
      for ((i = 0; i < ''${#s}; i++)); do
        ch=''${s:i:1}
        case "$ch" in
          [a-zA-Z0-9.~_-]) out+="$ch" ;;
          ' ') out+="+" ;;
          *) printf -v ch '%%%02X' "'$ch"; out+="$ch" ;;
        esac
      done
      printf '%s' "$out"
    }

    case "''${1:-}" in
      power)
        choice=$(printf '%s\n' \
          "󰌾  Lock" \
          "󰍃  Logout" \
          "󰤄  Suspend" \
          "󰒲  Hibernate" \
          "󰜉  Reboot" \
          "󰐥  Shutdown" \
          | fuzzel --dmenu --prompt "power " --lines 6 --width 24) || exit 0
        case "$choice" in
          *Lock)      loginctl lock-session ;;
          *Logout)    hyprctl dispatch exit ;;
          *Suspend)   systemctl suspend ;;
          *Hibernate) systemctl hibernate ;;
          *Reboot)    systemctl reboot ;;
          *Shutdown)  systemctl poweroff ;;
        esac ;;

      theme)
        choice=$(nomarchy-theme-sync list \
          | fuzzel --dmenu --prompt "theme ") || exit 0
        [ -n "$choice" ] && exec nomarchy-theme-sync apply "$choice" ;;

      clipboard)
        sel=$(cliphist list | fuzzel --dmenu --prompt "clip " --width 60) || exit 0
        printf '%s' "$sel" | cliphist decode | wl-copy ;;

      calc)
        expr=$(fuzzel --prompt-only "= ") || exit 0
        [ -n "$expr" ] || exit 0
        result=$(qalc -t -- "$expr" 2>&1 | tail -n 1)
        choice=$(printf '%s\n' "󰆏  Copy result" "󰃬  New calculation" \
          | fuzzel --dmenu --lines 2 --width 40 \
              --prompt "= " --mesg "$expr = $result") || exit 0
        case "$choice" in
          *Copy*) printf '%s' "$result" | wl-copy ;;
          *New*)  exec "$0" calc ;;
        esac ;;

      files)
        sel=$(fd . "$HOME" --type f --hidden --exclude .git --exclude .cache 2>/dev/null \
          | head -n 50000 \
          | sed "s|^$HOME/||" \
          | fuzzel --dmenu --prompt "file " --width 60) || exit 0
        [ -n "$sel" ] && exec xdg-open "$HOME/$sel" ;;

      web)
        q=$(fuzzel --prompt-only "search ") || exit 0
        [ -n "$q" ] || exit 0
        exec xdg-open "https://duckduckgo.com/?q=$(urlencode "$q")" ;;

      "")
        choice=$(printf '%s\n' \
          "󰀻  Apps" \
          "󰏘  Theme" \
          "󰅌  Clipboard" \
          "󰃬  Calculator" \
          "󰈞  Files" \
          "󰖟  Web search" \
          "󰐥  Power" \
          | fuzzel --dmenu --prompt "menu " --lines 7 --width 24) || exit 0
        case "$choice" in
          *Apps*)      exec fuzzel ;;
          *Theme*)     exec "$0" theme ;;
          *Clipboard*) exec "$0" clipboard ;;
          *Calc*)      exec "$0" calc ;;
          *Files*)     exec "$0" files ;;
          *Web*)       exec "$0" web ;;
          *Power*)     exec "$0" power ;;
        esac ;;

      *)
        echo "usage: nomarchy-menu [power|theme|clipboard|calc|files|web]" >&2
        exit 64 ;;
    esac
  '';
in
{
  config = lib.mkIf cfg.fuzzel.enable {
    home.packages = [
      nomarchy-menu
      pkgs.libqalculate # qalc, the calc module's engine
      pkgs.fd           # files module
      pkgs.xdg-utils    # xdg-open for files/web
    ];

    programs.fuzzel = {
      enable = true;
      # Whole-swap themes bring their own fuzzel.ini; otherwise the
      # config is generated from the palette.
      settings = lib.mkIf (!hasIniOverride) {
        main = {
          # UI font first; the mono Nerd Font follows so menu icons
          # (nf-md glyphs) resolve — fcft falls back per glyph.
          font = "${t.fonts.ui}:size=${toString (t.fonts.size + 1)}, ${t.fonts.mono}:size=${toString (t.fonts.size + 1)}";
          terminal = cfg.terminal;
          layer = "overlay";
          lines = 12;
          width = 40;
          horizontal-pad = 24;
          vertical-pad = 16;
          inner-pad = 8;
        };

        colors = {
          background = hexa c.base "f2";
          text = hexa c.text "ff";
          prompt = hexa c.subtext "ff";
          placeholder = hexa c.muted "ff";
          input = hexa c.text "ff";
          match = hexa c.accent "ff";
          selection = hexa c.surface "ff";
          selection-text = hexa c.text "ff";
          selection-match = hexa c.accent "ff";
          border = hexa c.accent "ee";
        };

        border = {
          width = t.ui.borderSize;
          radius = t.ui.rounding;
        };
      };
    };

    xdg.configFile."fuzzel/fuzzel.ini" = lib.mkIf hasIniOverride {
      source = iniOverride;
    };
  };
}