#!/bin/bash

# Build: Bootstrap a base Hyperbola GNU plus Linux-libre system

set -e -u -o pipefail

# Set script version
SCRIPT_VERSION="v1.0.0"

# Display usage message
usage() {
    cat <<EOF
Usage: bash $0 [options]

Options:
  -a, --arch ARCH             Specify architecture (default: x86_64)
  -d, --delete-chroot         Delete the chroot environment after processing (default: yes)
  -r, --release VERSION       Specify version (default: v0.4.3)
  -u, --url URL               Specify repository URL (default: https://mirror.fsf.org/hyperbola/gnu-plus-linux-libre/stable)
  -owu, --owner-user-id ID    Owner user ID for the tar file (default: 1000)
  -owg, --owner-group-id ID   Owner group ID for the tar file (default: 1000)
  -h, --help                  Display this help message
EOF
}

SCRIPT=$(readlink -f "$0")
SCRIPT_PWD=$(dirname "$SCRIPT")
CHROOT_DELETE='y'

RESULTPATH="${SCRIPT_PWD}"
ARCH="x86_64"
RELEASE="v0.4.3"
REPO_URL="https://mirror.fsf.org/hyperbola/gnu-plus-linux-libre/stable"
TAR_OWNER_USER_ID="1000"
TAR_OWNER_GROUP_ID="1000"

# Parse command-line arguments
while [[ $# -gt 0 ]]; do
    key="${1}"
    case $key in
        -a|--arch)
            ARCH="${2}"
            shift 2
            ;;
        -d|--delete-chroot)
            CHROOT_DELETE="${2}"
            shift 2
            ;;
        -r|--release)
            RELEASE="${2}"
            shift 2
            ;;
        -u|--url)
            REPO_URL="${2}"
            shift 2
            ;;
        -owu|--owner-user-id)
            TAR_OWNER_USER_ID="${2}"
            shift 2
            ;;
        -owg|--owner-group-id)
            TAR_OWNER_GROUP_ID="${2}"
            shift 2
            ;;
        -v|--version)
            echo "version: $SCRIPT_VERSION"
            exit 0
            ;;
        -h|--help)
            usage && exit 0
            ;;
        *)
            echo "Unrecognized option: $key"
            usage && exit 1
            ;;
    esac
done

# Check if the user is root (superuser)
if [[ $(id -u) -ne 0 ]]; then
    echo "This script must be run as root (superuser) because it uses 'mknod' to make device nodes, which requires superuser privileges."
    exit 1
fi

# Set ROOTFS
ROOTFS="$ARCH"

# Remove old archives
rm -fv "${RESULTPATH}/hyperbola-bootstrap-${ARCH}.tar.gz" "${RESULTPATH}/hyperbola-bootstrap-${ARCH}.tar.gz.sha512sum"

# Make bootstrap for Hyperbola
bash "${SCRIPT_PWD}/hyper-bootstrap_${RELEASE}.sh" -a "${ARCH}" -r "${REPO_URL}" "${ROOTFS}"

# Clean up package cache
(cd "${ROOTFS}" && rm -rf var/cache/*)

# Make new tarball
printf '%b%s%b%s%b\n' '\e[1;32m' '==> ' '\e[0m\033[1m' "Make hyperbola-bootstrap-${ARCH}.tar.gz..." '\e[m'
(cd "${RESULTPATH}/${ROOTFS}" && tar --create --gzip --numeric-owner --xattrs --acls --file="${SCRIPT_PWD}/hyperbola-bootstrap-${ARCH}.tar.gz" *)

# Make sha512sum
(cd ${RESULTPATH} && sha512sum "hyperbola-bootstrap-${ARCH}.tar.gz" >| "hyperbola-bootstrap-${ARCH}.tar.gz.sha512sum")

# Fix permission Tarballs
(cd ${RESULTPATH} && chown ${TAR_OWNER_USER_ID}:${TAR_OWNER_GROUP_ID} hyperbola-bootstrap-${ARCH}.tar.gz*)

# Clean chroot temp
case $CHROOT_DELETE in
    y|yes) rm -rf "${RESULTPATH}/${ROOTFS}" || true && echo -e "\e[1;32m==>\e[0m\033[1m Temporal chroot deleted! \e[m" ;;
    n|not) echo 'Temporal chroot available' ;;
    *) echo 'Invalid option "$@"' ;;
esac

# Report result
echo "REPO: ${REPO_URL}"
echo "ROOTFS: ${ROOTFS}"
echo "RESULTPATH: ${RESULTPATH}"