#!/bedrock/libexec/busybox sh
#
# MX Linux bootstrap support
#
#      This program is free software; you can redistribute it and/or
#      modify it under the terms of the GNU General Public License
#      version 2 as published by the Free Software Foundation.
#
# Copyright (c) 2026 Daniel Thau <danthau@bedrocklinux.org>
#

# shellcheck source=src/slash-bedrock/libexec/brl-fetch
. /bedrock/share/common-code
trap 'fetch_abort "Unexpected error occurred."' EXIT

check_supported() {
	false
}

speed_test_url() {
	echo "dists/${target_release}/Release"
}

list_mirrors() {
	echo 'http://mxrepo.com/mx/repo'
}

brl_arch_to_distro() {
	case "${1}" in
	"aarch64") echo "arm64" ;;
	"armv7hl") echo "armhf" ;;
	"i686") echo "i386" ;;
	"x86_64") echo "amd64" ;;
	*) abort "brl does not know how to translate arch \"${1}\" to ${distro} format" ;;
	esac
}

list_architectures() {
	cat <<EOF
aarch64
armv7hl
i686
x86_64
EOF
}

list_releases() {
	for mirror in "${flag_mirror}" $(list_mirrors); do
		if download -q "${mirror}/dists" - |
			list_links |
			grep '/$' |
			grep -v -- '-' |
			grep -ve '[.]' -ve '^/' -ve '^temp/$' |
			sed 's,/$,,g'; then
			break
		fi
	done
}

default_release() {
	best_version=''
	best_release=''
	for release in $(list_releases); do
		for mirror in "${flag_mirror}" $(list_mirrors); do
			version="$(download -q "${mirror}/dists/${release}/Release" - | awk '$1 == "Version:" {print$2;exit}')"
			if [ -n "${version}" ]; then
				break
			fi
		done
		if [ -z "${version}" ]; then
			continue
		fi
		if [ -z "${best_version}" ] || [ "$(printf '%s\n%s\n' "${version}" "${best_version}" | sort -V | tail -n1)" = "${version}" ]; then
			best_version="${version}"
			best_release="${release}"
		fi
	done
	echo "${best_release}"
}

fetch() {
	# MX Linux uses Debian as a base and publishes MX-specific packages in a
	# separate repository. Bootstrap from Debian, then add MX repository lines.
	debian_mirror='http://ftp.debian.org/debian'
	bootstrap_deps="debootstrap apt dpkg coreutils dash bash grep sed awk perl bzip2 gzip tar gpgv debian-archive-keyring"

	step "Downloading package information database"
	download "${debian_mirror}/dists/${target_release}/main/binary-${distro_arch}/Packages.gz" "${bootstrap_dir}/Packages.gz"
	gunzip "${bootstrap_dir}/Packages.gz"

	step "Converting distro package information database to brl format"
	debdb_to_brldb "${bootstrap_dir}/Packages" "${bootstrap_dir}/brldb"

	step "Calculating required bootstrap packages"
	brldb_calculate_required_packages "${bootstrap_dir}/brldb" "${bootstrap_dir}/required_packages" "${bootstrap_deps}"

	step "Downloading bootstrap packages"
	checksum_downloads "${cache}/packages/" "$(awk -v"m=${debian_mirror}" '{print m"/"$0}' "${bootstrap_dir}/required_packages")"

	step "Extracting bootstrap packages"
	bootstrap_packages="$(awk -v"d=${cache}/packages/" '{sub(/^.*\//,d);print $1}' "${bootstrap_dir}/required_packages")"
	# shellcheck disable=SC2086
	extract_debs "${bootstrap_dir}" ${bootstrap_packages}

	step "Running bootstrap software"
	setup_chroot "${bootstrap_dir}"
	setup_ssl "${bootstrap_dir}"
	set +o pipefail
	if LANG=C chroot "${bootstrap_dir}" debootstrap --help | grep -q "cache-dir"; then
		share_cache "packages" "${bootstrap_dir}/packages"
		yes "" | LANG=C chroot "${bootstrap_dir}" debootstrap --variant=minbase --cache-dir="/packages" "${target_release}" "/target-root" "${debian_mirror}"
	else
		yes "" | LANG=C chroot "${bootstrap_dir}" debootstrap --variant=minbase "${target_release}" "/target-root" "${debian_mirror}"
	fi
	set -o pipefail

	step "Configuring"
	set +o pipefail
	setup_chroot "${target_dir}"
	autopkgs="$(LANG=C chroot "${target_dir}" /usr/bin/apt-mark showmanual)"
	# word splitting is desired here
	# shellcheck disable=SC2086
	yes "" | LANG=C chroot "${target_dir}" /usr/bin/apt-mark auto ${autopkgs}

	if echo "${target_release}" | grep -q "^\(buzz\|rex\|bo\|hamm\|slink\|potato\|woody\|sarge\|etch\|lenny\|squeeze\|wheezy\|jessie\|stretch\|buster\)$"; then
		# Pre-bullseye: one-line format, old security URL
		echo "deb ${debian_mirror} ${target_release} main contrib non-free" >"${target_dir}/etc/apt/sources.list"
		echo "deb ${debian_mirror} ${target_release}-updates main contrib non-free" >>"${target_dir}/etc/apt/sources.list"
		echo "deb http://security.debian.org/ ${target_release}/updates main contrib non-free" >>"${target_dir}/etc/apt/sources.list"
	else
		# Bullseye+: deb822 format
		if echo "${target_release}" | grep -q "^\(bullseye\)$"; then
			debian_components="main contrib non-free"
		else
			debian_components="main contrib non-free non-free-firmware"
		fi
		: >"${target_dir}/etc/apt/sources.list"
		cat >"${target_dir}/etc/apt/sources.list.d/debian.sources" <<EOF
Types: deb
Enabled: yes
URIs: ${debian_mirror}/
Suites: ${target_release}
Components: ${debian_components}
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

Types: deb
Enabled: yes
URIs: http://security.debian.org/debian-security/
Suites: ${target_release}-security
Components: ${debian_components}
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg

Types: deb
Enabled: yes
URIs: ${debian_mirror}/
Suites: ${target_release}-updates
Components: ${debian_components}
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
EOF
	fi
	yes "" | LANG=C chroot "${target_dir}" /usr/bin/apt-get update

	step "Installing MX archive keyring"
	download "${target_mirror}/dists/${target_release}/main/binary-${distro_arch}/Packages.gz" "${bootstrap_dir}/mx-Packages.gz"
	gunzip "${bootstrap_dir}/mx-Packages.gz"
	mx_keyring_paths="$(awk '/^Package: .*archive-keyring/{found=1} found && /^Filename:/{print $2; found=0}' "${bootstrap_dir}/mx-Packages")"
	for mx_keyring_path in ${mx_keyring_paths}; do
		download "${target_mirror}/${mx_keyring_path}" "${target_dir}/tmp/mx-keyring.deb"
		yes "" | LANG=C chroot "${target_dir}" /usr/bin/apt-get install "/tmp/mx-keyring.deb"
	done

	if echo "${target_release}" | grep -q "^\(buzz\|rex\|bo\|hamm\|slink\|potato\|woody\|sarge\|etch\|lenny\|squeeze\|wheezy\|jessie\|stretch\|buster\)$"; then
		cat >"${target_dir}/etc/apt/sources.list.d/mx.list" <<EOF
deb ${target_mirror} ${target_release} main non-free
EOF
	else
		mx_signed_by=""
		for f in "${target_dir}"/usr/share/keyrings/mx*archive-keyring*.gpg; do
			[ -e "${f}" ] && mx_signed_by="/usr/share/keyrings/${f##*/}"
		done
		cat >"${target_dir}/etc/apt/sources.list.d/mx.sources" <<EOF
Types: deb
Enabled: yes
URIs: ${target_mirror}/
Suites: ${target_release}
Components: main non-free
Signed-By: ${mx_signed_by}
EOF
	fi

	yes "" | LANG=C chroot "${target_dir}" /usr/bin/apt-get update
	yes "" | LANG=C chroot "${target_dir}" /usr/bin/apt-get install locales-all
	set -o pipefail
}