#!/usr/bin/env bash

set -euo pipefail

# ==========================================
# EspOS OpenRC RootFS Builder
# Debian 13 Trixie + EspOS unstable
#
# Genera:
#   espos-openrc-rootfs.tar.xz
#
# No incluye:
#   - live user
#   - escritorio
#   - instalador
#   - configuración ISO
# ==========================================


ARCH="amd64"

DEBIAN_SUITE="trixie"
DEBIAN_MIRROR="http://deb.debian.org/debian"

ESPOS_REPO="https://repo.elordenador.org"
ESPOS_SUITE="espos-unstable"

ROOTFS="$(pwd)/rootfs"
OUTPUT="espos-openrc-rootfs.tar.xz"


# Paquete keyring generado previamente
KEYRING_PACKAGE="espos-archive-keyring"


# Nombre del keyring instalado por el paquete
KEYRING_PATH="/usr/share/keyrings/espos-archive-keyring.gpg"



BASE_PACKAGES="
bash
coreutils
sudo
ca-certificates
locales
tzdata
curl
wget
openssh-server
openrc
dbus
elogind
"


ESPOS_PACKAGES="
base-files
"


cleanup()
{
    echo "[+] Desmontando sistemas virtuales"

    umount -lf "$ROOTFS/dev/pts" 2>/dev/null || true
    umount -lf "$ROOTFS/dev" 2>/dev/null || true
    umount -lf "$ROOTFS/proc" 2>/dev/null || true
    umount -lf "$ROOTFS/sys" 2>/dev/null || true
}


trap cleanup EXIT



echo "[+] Eliminando rootfs anterior"

rm -rf "$ROOTFS"



echo "[+] Creando Debian ${DEBIAN_SUITE}"


debootstrap \
    --arch="$ARCH" \
    "$DEBIAN_SUITE" \
    "$ROOTFS" \
    "$DEBIAN_MIRROR"



echo "[+] Copiando resolv.conf"

cp /etc/resolv.conf "$ROOTFS/etc/resolv.conf"



echo "[+] Montando pseudo filesystems"

mount --bind /dev "$ROOTFS/dev"
mount --bind /dev/pts "$ROOTFS/dev/pts"

mount -t proc proc "$ROOTFS/proc"
mount -t sysfs sys "$ROOTFS/sys"



echo "[+] Preparando repo EspOS temporal"


cat > "$ROOTFS/etc/apt/sources.list.d/espos.list" <<EOF
deb [trusted=yes] ${ESPOS_REPO} ${ESPOS_SUITE} main
EOF


echo "[+] Cargando repo..."
chroot "$ROOTFS" apt update


echo "[+] Instalando keyring"
chroot "$ROOTFS" apt install -y espos-archive-keyring

echo "[+] Cambiando repo a signed-by"


cat > "$ROOTFS/etc/apt/sources.list.d/espos.list" <<EOF
deb [signed-by=${KEYRING_PATH}] ${ESPOS_REPO} ${ESPOS_SUITE} main
EOF



echo "[+] Actualizando repositorios firmados"


chroot "$ROOTFS" apt update



echo "[+] Instalando sistema base"


chroot "$ROOTFS" apt install -y \
    $BASE_PACKAGES



echo "[+] Instalando paquetes EspOS"


chroot "$ROOTFS" apt install -y \
    $ESPOS_PACKAGES



echo "[+] Configurando OpenRC como init"


ln -sf /sbin/openrc-init "$ROOTFS/sbin/init"



echo "[+] Eliminando systemd"


chroot "$ROOTFS" apt purge -y \
    systemd \
    systemd-sysv \
    2>/dev/null || true



echo "[+] Configurando hostname"


echo "espos" > "$ROOTFS/etc/hostname"



echo "[+] Configurando locales"


chroot "$ROOTFS" bash -c "
echo 'en_US.UTF-8 UTF-8' > /etc/locale.gen
locale-gen
"



echo "[+] Habilitando servicios base OpenRC"


chroot "$ROOTFS" rc-update add devfs sysinit || true
chroot "$ROOTFS" rc-update add procfs boot || true
chroot "$ROOTFS" rc-update add sysfs boot || true



echo "[+] Limpiando APT"


chroot "$ROOTFS" apt clean

rm -rf "$ROOTFS/var/lib/apt/lists/*"

rm -rf "$ROOTFS/tmp/*"



echo "[+] Creando rootfs comprimido"


tar \
    --numeric-owner \
    -C "$ROOTFS" \
    -cJf "$OUTPUT" .



echo
echo "======================================"
echo " EspOS OpenRC rootfs creado"
echo
echo " $OUTPUT"
echo "======================================"