#!/bin/bash

restoreDir="/etc/restore"

kernel="$(uname -s)"
scriptPath="$(dirname "$(readlink -f "$0")")"


if [[ "$kernel" == "Darwin" ]]; then
    restoreDir="${HOME}/restore"
fi

createRestoreDir() {
    if [[ -d "${restoreDir}" ]]; then
        # Keeps the directory, due to newer borgmatic service restrictions.
        rm -rf "${restoreDir}/*" || exit 2
    else
        mkdir -p "${restoreDir}" || exit 2
    fi
}

checkOS() {
    if [[ "$kernel" == "Darin" ]]; then
        return 0
    elif [[ "$kernel" == "Linux" ]]; then
        if [[ -f /etc/os-release ]]; then
            source /etc/os-release
            return 0
        else
            echo "Unknown Linux Distribution"
            return 1
        fi
    fi
    return 1
}

runOsHook() {
    local hook="$1"

    if [[ "$kernel" == "Darwin" ]]; then
        "${scriptPath}/os_macos" "$hook"
    elif [[ "$kernel" == "Linux" ]]; then
        case "$ID" in
            debian)                 "${scriptPath}/os_debian" "$hook";;
            fedora)                 "${scriptPath}/os_fedora" "$hook";;
            garuda)                 "${scriptPath}/os_garuda" "$hook";;
            solus)                  "${scriptPath}/os_solus" "$hook";;
            opensuse-leap)          "${scriptPath}/os_suse" "$hook";;
            opensuse-tumbleweed)    "${scriptPath}/os_suse" "$hook";;
        esac
    fi
    return $?
}


hook_check() {
    checkOS || exit 200

    runOsHook before_check
}

hook_pre() {
    hook_check || exit 200

    createRestoreDir || exit $?
    runOsHook before_backup
}

hook_post() {
    if [[ ! -f "${restoreDir}/.do-not-delete" ]]; then
        rm -rf "$restoreDir"
    fi
    runOsHook after_backup
}


case "$1" in
    before_check)   hook_check || exit $?;;
    before_backup)  hook_pre   || exit $?;;
    after_backup)   hook_post  || exit $?;;
esac