#!/bin/bash

resticVersion="0.17.0"
resticprofileVersion="0.28.0"
systemrescueVersion="11.02"
backupEngine="resticprofile"

restoreDir="/etc/restore"
scriptPath="$(dirname "$(readlink -f "$0")")"
configPath="$(dirname "$(readlink -f "${scriptPath}/config")")"
systemrescueBaseDir="/var/backups/systemrescue-backup"
systemrescueTempDir="/tmp/systemrescue-backup"


if [[ -r "${configPath}/base.cfg" ]]; then
    source "${configPath}/base.cfg"
fi

# Check Dependencies to run.
command -v rsync &>/dev/null || exit 2
command -v curl &>/dev/null || exit 2
command -v tar &>/dev/null || exit 2
command -v bunzip2 &>/dev/null || exit 2

# Start the preparation for building the SystemRescueBackup disc image
mkdir -p "${systemrescueTempDir}" || exit 1
mkdir -p "${systemrescueBaseDir}" || exit 1

if [[ "${backupEngine,,}" == "resticprofile" ]]; then
    mkdir -p "${systemrescueTempDir}/restic-install" || exit 1
    mkdir -p "${configPath}/sysrescue/build_into_srm/usr/local/bin"
    #pushd "${systemrescueTempDir}/restic-install" &>/dev/null || exit 1

    if [[ ! -f "${systemrescueBaseDir}/restic_${resticVersion}_linux_amd64" ]]; then
        curl -C - -Lso "${systemrescueBaseDir}/restic_${resticVersion}_linux_amd64.bz2" "https://github.com/restic/restic/releases/download/v${resticVersion}/restic_${resticVersion}_linux_amd64.bz2"
        bunzip2 -k "${systemrescueBaseDir}/restic_${resticVersion}_linux_amd64.bz2"
        chmod 755 "${systemrescueBaseDir}/restic_${resticVersion}_linux_amd64"
        chown root:root "${systemrescueBaseDir}/restic_${resticVersion}_linux_amd64"
        mv "${systemrescueBaseDir}/restic_${resticVersion}_linux_amd64" "${configPath}/build_into_srm/usr/local/bin/restic"
    fi
    if [[ ! -f "${systemrescueBaseDir}/resticprofile_${resticprofileVersion}_linux_amd64.tar.gz" ]]; then
        curl -C - -Lso "${systemrescueBaseDir}/resticprofile_${resticprofileVersion}_linux_amd64.tar.gz" "https://github.com/creativeprojects/resticprofile/releases/download/v${resticprofileVersion}/resticprofile_${resticprofileVersion}_linux_amd64.tar.gz"
        mkdir -p "${systemrescueTempDir}/restic-install"
        tar -xzf "resticprofile_${resticprofileVersion}_linux_amd64.tar.gz" -C "${systemrescueTempDir}/restic-install"
        chmod 755 "${systemrescueTempDir}/restic-install/resticprofile"
        chown root:root "${systemrescueTempDir}/restic-install/resticprofile"
        mv "${systemrescueTempDir}/restic-install/resticprofile" "${configPath}/build_into_srm/usr/local/bin/resticprofile"
        rm -rf "${systemrescueTempDir}/restic-install"
    fi
    #mkdir -p "${configPath}/sysrescue/build_into_srm/usr/local/bin"
    #cp "restic_${resticVersion}_linux_amd64" "${configPath}/build_into_srm/usr/local/bin/restic"
    #cp resticprofile "${configPath}/build_into_srm/usr/local/bin/resticprofile"
    #popd &>/dev/null
    #rm -rf "${systemrescueTempDir}/restic-install"
elif [[ "${backupEngine,,}" == "borgmatic" ]]; then
    : #FIXME
fi

mkdir -p "${configPath}/sysrescue/build_into_srm/etc/restore"
mount --bind "${restoreDir}" "${configPath}/sysrescue/build_into_srm/etc/restore"
if [[ "${backupEngine,,}" == "resticprofile" ]]; then
    mkdir -p "${configPath}/sysrescue/build_into_srm/etc/resticprofile"
    mount --bind "/etc/resticprofile" "${configPath}/sysrescue/build_into_srm/etc/resticprofile"
elif [[ "${backupEngine,,}" == "borgmatic" ]]; then
    mkdir -p "${configPath}/sysrescue/build_into_srm/etc/borgmatic"
    mkdir -p "${configPath}/sysrescue/build_into_srm/etc/borgmatic.d"
    mount --bind "/etc/borgmatic" "${configPath}/sysrescue/build_into_srm/etc/borgmatic"
    mount --bind "/etc/borgmatic.d" "${configPath}/sysrescue/build_into_srm/etc/borgmatic.d"
fi

#rsync -avhHi "${restoreDir}" "${configPath}/sysrescue/build_into_srm/etc/restore"
#rsync -avhHi "/etc/resticprofile" "${configPath}/sysrescue/build_into_srm/etc/resticprofile"

curl -C - -Lso "${systemrescueBaseDir}/systemrescue-${systemrescueVersion}-amd64.iso" "https://sourceforge.net/projects/systemrescuecd/files/sysresccd-x86/${systemrescueVersion}/systemrescue-${systemrescueVersion}-amd64.iso/download"
curl -C - -Lso "${systemrescueBaseDir}/systemrescue-customize" "https://gitlab.com/systemrescue/systemrescue-sources/-/raw/main/airootfs/usr/share/sysrescue/bin/sysrescue-customize?inline=false"
chmod 755 "${systemrescueBaseDir}/systemrescue-customize"
chown root:root "${systemrescueBaseDir}/systemrescue-customize"

if [[ "${backupEngine,,}" == "resticprofile" ]]; then
    umount "${configPath}/sysrescue/build_into_srm/etc/resticprofile"
elif [[ "${backupEngine,,}" == "borgmatic" ]]; then
    umount "${configPath}/sysrescue/build_into_srm/etc/borgmatic"
    umount "${configPath}/sysrescue/build_into_srm/etc/borgmatic.d"
fi