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

let
  # This device description is a bit configurable through
  # mobile options...

  # Enabling the splash changes some settings.
  splash = config.mobile.boot.stage-1.splash.enable;

  kernel = pkgs.linuxPackages_4_19.kernel;
  device_info = {
   name = "QEMU (x86_64)";
   # format_version = "0";
   # manufacturer = "Qemu";
   # date = "";
   # keyboard = true;
   # nonfree = "????";
   # dtb = "";
   # modules_initfs = "qxl drm_bochs";
   # external_storage = true;
   # flash_method = "none";
   # generate_legacy_uboot_initfs = false;
   # arch = "x86_64";
  };

  modules = [
    # Disk images
    "ata_piix"
    "sd_mod"

    # Networking
    "e1000"

    # Keyboard
    "hid_generic"
    "pcips2" "atkbd" "i8042"

    # Mouse
    "mousedev"

    # Input within X11
    "uinput" "evdev"

    # USB
    "usbcore" "usbhid" "ehci_pci" "ehci_hcd"

    # x86 RTC needed by the stage 2 init script.
    "rtc_cmos"
  ];

  MODES = {
      "800x600x16" = { vga =   "788"; width =  800; height =  600; depth = 16; };
     "1024x786x16" = { vga =   "791"; width = 1024; height =  768; depth = 16; };
     "1024x786x32" = { vga = "0x344"; width = 1024; height =  768; depth = 32; };
    "1280x1024x16" = { vga =   "794"; width = 1280; height = 1024; depth = 16; };
     "1280x720x16" = { vga = "0x38d"; width = 1280; height =  720; depth = 16; };
     "1280x720x24" = { vga = "0x38e"; width = 1280; height =  720; depth = 24; };
     "1280x720x32" = { vga = "0x38f"; width = 1280; height =  720; depth = 32; };
    "1920x1080x16" = { vga = "0x390"; width = 1920; height = 1080; depth = 16; };
    "1920x1080x24" = { vga = "0x391"; width = 1920; height = 1080; depth = 24; };
    "1920x1080x32" = { vga = "0x392"; width = 1920; height = 1080; depth = 32; };
     "720x1280x32" = { vga = "0x393"; width =  720; height = 1280; depth = 32; };
    "1080x1920x32" = { vga = "0x394"; width = 1080; height = 1920; depth = 32; };
  };

  MODE = MODES."1080x1920x32";
in
{
  mobile.device.name = "qemu-x86_64";
  mobile.device.info = device_info // {
    # TODO : make kernel part of options.
    inherit kernel;
    kernel_cmdline = lib.concatStringsSep " " ([
      "console=tty1"
      "console=ttyS0"
      "vga=${MODE.vga}" 
      "vt.global_cursor_default=0"
      "quiet"
    ]);
  };
  mobile.hardware = {
    soc = "generic-x86_64";
    screen = {
      inherit (MODE) height width;
    };
    ram = 1024 * 2;
  };

  mobile.system.type = "kernel-initrd";
  mobile.boot.stage-1 = {
    kernel = {
      modular = true;
      inherit modules;
    };
  };
}