#!/bin/bash

command -v getarg > /dev/null || . /lib/dracut-lib.sh

OLD_UMASK=$(umask)
umask 0022
mkdir -p /run/initramfs/state/etc/sysconfig/network-scripts
umask "$OLD_UMASK"

function cms_write_config() {
    . /tmp/cms.conf
    SUBCHANNELS="$(echo "$SUBCHANNELS" | sed 'y/ABCDEF/abcdef/')"
    OLDIFS=$IFS
    IFS=,
    read -ra subch_array <<< "indexzero,$SUBCHANNELS"
    IFS=$OLDIFS
    devbusid=${subch_array[1]}
    if [ "$NETTYPE" = "ctc" ]; then
        driver="ctcm"
    else
        driver=$NETTYPE
    fi

    DEVICE=$(cd "/sys/devices/${driver}/$devbusid/net/" && set -- * && [ "$1" != "*" ] && echo "$1")

    read -r uuid < /proc/sys/kernel/random/uuid

    IFCFGFILE=/run/initramfs/state/etc/sysconfig/network-scripts/ifcfg-$DEVICE

    strglobin "$IPADDR" '*:*:*' && ipv6=1

    # to please NetworkManager on startup in loader before loader reconfigures net
    cat > /etc/sysconfig/network << EOF
HOSTNAME=$HOSTNAME
EOF
    echo "$HOSTNAME" > /etc/hostname
    if [ "$ipv6" ]; then
        echo "NETWORKING_IPV6=yes" >> /etc/sysconfig/network
    else
        echo "NETWORKING=yes" >> /etc/sysconfig/network
    fi

    cat > "$IFCFGFILE" << EOF
DEVICE=$DEVICE
UUID=$uuid
ONBOOT=yes
BOOTPROTO=static
MTU=$MTU
SUBCHANNELS=$SUBCHANNELS
EOF
    if [ "$ipv6" ]; then
        cat >> "$IFCFGFILE" << EOF
IPV6INIT=yes
IPV6_AUTOCONF=no
IPV6ADDR=$IPADDR/$NETMASK
IPV6_DEFAULTGW=$GATEWAY
EOF
    else
        cat >> "$IFCFGFILE" << EOF
IPADDR=$IPADDR
NETMASK=$NETMASK
BROADCAST=$BROADCAST
GATEWAY=$GATEWAY
EOF
    fi
    if [ "$ipv6" ]; then
        # shellcheck disable=SC2153
        IFS="," read -r DNS1 DNS2 _ <<< "$DNS"
    else
        IFS=":" read -r DNS1 DNS2 _ <<< "$DNS"
    fi
    # real DNS config for NetworkManager to generate /etc/resolv.conf
    [[ $DNS1 ]] && echo "DNS1=$DNS1" >> "$IFCFGFILE"
    [[ $DNS2 ]] && echo "DNS2=$DNS2" >> "$IFCFGFILE"
    # just to please loader's readNetInfo && writeEnabledNetInfo
    # which eats DNS1,DNS2,... and generates it themselves based on DNS
    if [[ $ipv6 ]]; then
        [[ $DNS ]] && echo "DNS=\"$DNS\"" >> "$IFCFGFILE"
    else
        [[ $DNS ]] && echo "DNS=\"${DNS/:/,}\"" >> "$IFCFGFILE"
    fi
    # colons in SEARCHDNS already replaced with spaces above for /etc/resolv.conf
    [[ $SEARCHDNS ]] && echo "DOMAIN=\"$SEARCHDNS\"" >> "$IFCFGFILE"
    [[ $PEERID ]] && echo "PEERID=$PEERID" >> "$IFCFGFILE"
    [[ $MACADDR ]] && echo "MACADDR=$MACADDR" >> "$IFCFGFILE"
    unset DNS1
    unset DNS2
    echo "files /etc/sysconfig/network-scripts" >> /run/initramfs/rwtab
    echo "files /var/lib/dhclient" >> /run/initramfs/rwtab
}

[ -f /tmp/cms.conf ] && cms_write_config
