# Live ISO host — boot the full Nomarchy desktop from a USB stick or QEMU
# without touching the disk. No installer yet (see roadmap); this target
# exists to test the distro end-to-end on real hardware.
{ lib, pkgs, username, nomarchySrc, ... }:

{
  networking.hostName = "nomarchy-live";

  isoImage.volumeID = lib.mkForce "NOMARCHY_LIVE";
  isoImage.edition = lib.mkForce "live";

  # Do NOT touch networking.wireless here: since NixOS 26.05 the
  # NetworkManager module drives its wifi backend through it
  # (wireless.enable = true + dbusControlled). Force-disabling it
  # kills NM's supplicant — wifi devices vanish from nmtui even
  # though the driver is loaded (seen on a Latitude 5410 / AX201).

  # ── Live user: no password, straight into the desktop ──────────────
  users.users.${username} = {
    isNormalUser = true;
    initialHashedPassword = "";
    extraGroups = [ "wheel" "networkmanager" "video" "render" "audio" "input" ];
  };
  security.sudo.wheelNeedsPassword = false;
  services.getty.autologinUser = lib.mkForce username;

  # Boot straight into Hyprland once; logging out lands on tuigreet.
  services.greetd.settings.initial_session = {
    command = "start-hyprland";
    user = username;
  };

  # ── Hardware breadth ────────────────────────────────────────────────
  # Force-loading every GPU driver in the initrd (amdgpu+radeon+nouveau+
  # i915) panics most machines — only one of them can claim the GPU and
  # the others explode. `availableKernelModules` lets udev load just the
  # one that matches; virtio_gpu covers QEMU (tools/test-live-iso.sh).
  boot.initrd.availableKernelModules = [ "amdgpu" "radeon" "nouveau" "i915" "virtio_gpu" ];
  services.qemuGuest.enable = lib.mkDefault true;

  # ── The Nomarchy flake on board ─────────────────────────────────────
  # Read-only copy in /etc (also pins the flake source into the ISO
  # closure); seeded writable into the live home so theme switching —
  # state write + `home-manager switch` — works exactly like on an
  # installed system. $NOMARCHY_PATH already defaults to ~/.nomarchy.
  environment.etc."nomarchy".source = nomarchySrc;

  systemd.services.nomarchy-seed-flake = {
    description = "Seed a writable Nomarchy flake into the live user's home";
    wantedBy = [ "multi-user.target" ];
    serviceConfig.Type = "oneshot";
    script = ''
      home=/home/${username}
      if [ ! -e "$home/.nomarchy" ]; then
        cp -r ${nomarchySrc} "$home/.nomarchy"
        chmod -R u+w "$home/.nomarchy"
        chown -R ${username}:users "$home/.nomarchy"
      fi
    '';
  };

  services.getty.helpLine = lib.mkForce ''

    Welcome to the Nomarchy live environment.

    The graphical session autologins as '${username}' (no password).
    Theme switching:  nomarchy-theme-sync apply <name>   (or SUPER+T)
    Wallpapers:       nomarchy-theme-sync bg next        (or SUPER+SHIFT+T)
    Install to disk:  nomarchy-install
    The flake lives at ~/.nomarchy.
  '';

  # ── Live-session desktop tweaks ─────────────────────────────────────
  home-manager.users.${username} = {
    wayland.windowManager.hyprland.settings = {
      # QEMU (and some panels) report a tiny "preferred" mode; ask for
      # the highest resolution instead.
      monitor = lib.mkForce [ ",highres,auto,1" ];
      # Welcome toast once the session is up (concatenated onto the
      # base exec-once list).
      exec-once = [
        "sh -c 'sleep 3; notify-send -a Nomarchy \"Welcome to Nomarchy\" \"SUPER+Return terminal · SUPER+T themes · install with nomarchy-install\"'"
      ];
    };
  };

  system.stateVersion = "26.05";
}