{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.grub2;
  payloadName = if cfg.asSecondaryPayload then
    "img/grub2"
  else
    "fallback/payload";

in {
  options.grub2 = {
    enable = mkEnableOption "grub2 coreboot primary payload";

    asSecondaryPayload = mkOption {
      type = types.bool;
      default = false;
    };

    font = mkOption {
      type = types.path;
      #default = "${pkgs.dejavu_fonts}/share/fonts/truetype/DejaVuSansMono.ttf";
      default = "${pkgs.unifont}/share/fonts/truetype/unifont.ttf";
    };
  };

  config = lib.mkIf cfg.enable {
    corenix.extraFiles = {
      ${payloadName} = {
        type = "payload";
        src = "${pkgs.coreboot-payload-grub2}/default_payload.elf";
      };
      "font.pf2".src = (
        pkgs.runCommand "font.pf2" {
          buildInputs = with pkgs; [ grub2 ];
        } "grub-mkfont --range=0x20-0x7E,0x2501-0x251F,0x2191-0x2193 --size=14 -o $out ${cfg.font}"
      );
      "etc/grub.cfg".src = ./files/grub.cfg;
      "background.png".src = ./files/background.png;
    };
  };
}