#!/bin/bash
# This script runs inside an aarch64 Arch Linux container and creates a
# rootfs tarball with X11, RetroArch, and all dependencies for ES-DE.
set -e

target="$(mktemp -d)"
trap 'rm -rf "$target"' 0

# Initialize pacman keyring
pacman-key --init
pacman-key --populate archlinuxarm || true

# Install base system + emulation stack
pacstrap -c "$target" \
    base \
    linux-firmware \
    networkmanager \
    openssh \
    sudo \
    mesa \
    xorg-server \
    xorg-xinit \
    xf86-video-fbdev \
    retroarch \
    retroarch-assets \
    libretro-core-info \
    exfatprogs \
    fuse2 \
    wget \
    unzip \
    htop \
    nano

# Configure hostname
echo "h700" > "$target/etc/hostname"

# Configure locale
echo "en_US.UTF-8 UTF-8" > "$target/etc/locale.gen"
chroot "$target" locale-gen
echo "LANG=en_US.UTF-8" > "$target/etc/locale.conf"

# Enable services
chroot "$target" systemctl enable NetworkManager
chroot "$target" systemctl enable sshd

# Create emulation user
chroot "$target" useradd -m -G wheel,video,audio,input -s /bin/bash emulation
echo "emulation:emulation" | chroot "$target" chpasswd

# Allow wheel group sudo
echo "%wheel ALL=(ALL:ALL) NOPASSWD: ALL" > "$target/etc/sudoers.d/wheel"

# Set DNS fallback
echo "nameserver 8.8.8.8" > "$target/etc/resolv.conf"

# MOTD
cat > "$target/etc/motd" << '__EOF__'
ALARM H700 Emulation Image
SSH is available. Default user: emulation / emulation
__EOF__

tar cf "${1:-/tmp/rootfs.tar}" -C "$target" .