#!/bin/bash

# run-shellcheck
#
# CIS Debian Hardening
#

#
# Ensure nftables is not installed with iptables (Automated)
#

set -e # One error, it's over
set -u # One variable unset, it's over

# shellcheck disable=2034
HARDENING_LEVEL=2
DESCRIPTION="Ensure nftables is not installed with iptables"
PACKAGE='nftables'
CONFLICT_PACKAGE='iptables'

# This function will be called if the script status is on enabled / audit mode
audit() {
    PACKAGE_INSTALLED=1
    CONFLICT_PACKAGE_INSTALLED=1

    is_pkg_installed "$PACKAGE"
    if [ "$FNRET" -eq 0 ]; then
        PACKAGE_INSTALLED=0
    fi

    is_pkg_installed "$CONFLICT_PACKAGE"
    if [ "$FNRET" -eq 0 ]; then
        CONFLICT_PACKAGE_INSTALLED=0
    fi

    if [ "$PACKAGE_INSTALLED" -eq 0 ] && [ "$CONFLICT_PACKAGE_INSTALLED" -eq 0 ]; then
        crit "'$PACKAGE' is installed with '$CONFLICT_PACKAGE'"
    else
        ok "'$PACKAGE' is not installed with '$CONFLICT_PACKAGE'"
    fi
}

# This function will be called if the script status is on enabled mode
apply() {
    audit
    if [ "$PACKAGE_INSTALLED" -eq 0 ] && [ "$CONFLICT_PACKAGE_INSTALLED" -eq 0 ]; then
        info "Trying to remove $PACKAGE"
        DEBIAN_FRONTEND='noninteractive' apt remove "$PACKAGE" -y
    fi
}

# This function will check config parameters required
check_config() {
    :
}

# Source Root Dir Parameter
if [ -r /etc/default/cis-hardening ]; then
    # shellcheck source=../../debian/default
    . /etc/default/cis-hardening
fi
if [ -z "$CIS_LIB_DIR" ]; then
    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
    echo "Cannot source CIS_LIB_DIR variable, aborting."
    exit 128
fi

# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
    # shellcheck source=../../lib/main.sh
    . "${CIS_LIB_DIR}"/main.sh
else
    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
    exit 128
fi