#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
# shellcheck disable=SC2016
set -eux
set -o pipefail

# shellcheck source=test/units/util.sh
. "$(dirname "$0")"/util.sh

at_exit() {
    systemctl stop systemd-networkd

    if [[ -v NETWORK_NAME && -v NETDEV_NAME && -v LINK_NAME ]]; then
        rm -fvr {/usr/lib,/etc,/run}/systemd/network/"$NETWORK_NAME" "/run/lib/systemd/network/$NETDEV_NAME" \
            {/usr/lib,/etc}/systemd/network/"$LINK_NAME" "/etc/systemd/network/${NETWORK_NAME}.d" \
            "new" "+4"
    fi

    rm -f /run/systemd/networkd.conf.d/10-hoge.conf
}

trap at_exit EXIT

systemctl unmask systemd-networkd.service
systemctl start systemd-networkd.service

export NETWORK_NAME="10-networkctl-test-$RANDOM.network"
export NETDEV_NAME="10-networkctl-test-$RANDOM.netdev"
export LINK_NAME="10-networkctl-test-$RANDOM.link"
cat >"/usr/lib/systemd/network/$NETWORK_NAME" <<EOF
[Match]
Name=test
EOF

# Test files

networkctl mask --runtime "donotexist.network"
assert_eq "$(readlink /run/systemd/network/donotexist.network)" "/dev/null"
networkctl unmask "donotexist.network" # unmask should work even without --runtime
[[ ! -e /run/systemd/network/donotexist.network ]]

touch /usr/lib/systemd/network/donotexist.network
(! networkctl unmask "donotexist.network")
rm /usr/lib/systemd/network/donotexist.network

networkctl cat "$NETWORK_NAME" | tail -n +2 | cmp - "/usr/lib/systemd/network/$NETWORK_NAME"

cat >new <<EOF
[Match]
Name=test2
EOF

EDITOR='mv new' script -ec 'networkctl edit --runtime "$NETWORK_NAME"' /dev/null
(! networkctl mask --runtime "$NETWORK_NAME")
printf '%s\n' '[Match]' 'Name=test2' | cmp - "/run/systemd/network/$NETWORK_NAME"

networkctl mask "$NETWORK_NAME"
assert_eq "$(readlink "/etc/systemd/network/$NETWORK_NAME")" "/dev/null"
(! networkctl edit "$NETWORK_NAME")
(! networkctl edit --runtime "$NETWORK_NAME")
(! networkctl cat "$NETWORK_NAME")
networkctl unmask "$NETWORK_NAME"

EDITOR='true' script -ec 'networkctl edit "$NETWORK_NAME"' /dev/null
printf '%s\n' '[Match]' 'Name=test2' | cmp - "/etc/systemd/network/$NETWORK_NAME"

(! networkctl mask "$NETWORK_NAME")
(! EDITOR='true' script -ec 'networkctl edit --runtime "$NETWORK_NAME"' /dev/null)

cat >"+4" <<EOF
[Network]
IPv6AcceptRA=no
EOF

EDITOR='cp' script -ec 'networkctl edit "$NETWORK_NAME" --drop-in test' /dev/null
cmp "+4" "/etc/systemd/network/${NETWORK_NAME}.d/test.conf"

networkctl cat "$NETWORK_NAME" | grep '^# ' |
    cmp - <(printf '%s\n' "# /etc/systemd/network/$NETWORK_NAME" "# /etc/systemd/network/${NETWORK_NAME}.d/test.conf")

cat >"/usr/lib/systemd/network/$LINK_NAME" <<EOF
[Match]
OriginalName=test2

[Link]
Alias=test_alias
EOF

SYSTEMD_LOG_LEVEL=debug EDITOR='true' script -ec 'networkctl edit "$LINK_NAME"' /dev/null
cmp "/usr/lib/systemd/network/$LINK_NAME" "/etc/systemd/network/$LINK_NAME"

# The interface test2 does not exist, hence the below do not work.
(! networkctl cat @test2)
(! networkctl cat @test2:netdev)
(! networkctl cat @test2:link)
(! networkctl cat @test2:network)

# create .netdev file at last, otherwise, the .link file will not be applied to the interface.
networkctl edit --stdin --runtime "$NETDEV_NAME" <<EOF
[NetDev]
Name=test2
Kind=dummy
EOF

networkctl cat "$NETDEV_NAME" | grep -v '^# ' |
    cmp - <(printf '%s\n' "[NetDev]" "Name=test2" "Kind=dummy")

# wait for the interface being created and configured.
SYSTEMD_LOG_LEVEL=debug /usr/lib/systemd/systemd-networkd-wait-online -i test2:carrier --timeout 20

networkctl cat @test2:network | cmp - <(networkctl cat "$NETWORK_NAME")
networkctl cat @test2:netdev | cmp - <(networkctl cat "$NETDEV_NAME")
for c in "$NETWORK_NAME" "$NETDEV_NAME"; do
    assert_in "$(networkctl cat "$c" | head -n1)" "$(networkctl cat @test2:all)"
done

(! networkctl edit @test2:all)

EDITOR='cp' script -ec 'networkctl edit @test2 --drop-in test2.conf' /dev/null
cmp "+4" "/etc/systemd/network/${NETWORK_NAME}.d/test2.conf"

SYSTEMD_LOG_LEVEL=debug /usr/lib/systemd/systemd-networkd-wait-online -i test2:carrier --timeout 20
(! EDITOR='true' script -ec 'networkctl edit @test2 --runtime --drop-in test2.conf' /dev/null)

ip_link="$(ip link show test2)"
if systemctl --quiet is-active systemd-udevd; then
    networkctl cat @test2:link | cmp - <(networkctl cat "$LINK_NAME")
    assert_in "$(networkctl cat "$LINK_NAME" | head -n1)" "$(networkctl cat @test2:all)"

    assert_in 'alias test_alias' "$ip_link"
fi

mkdir -p /run/systemd/networkd.conf.d
cat >/run/systemd/networkd.conf.d/10-hoge.conf <<EOF
# TEST DROP-IN FILE
[Network]
SpeedMeter=yes
EOF

assert_in '# TEST DROP-IN FILE' "$(networkctl cat)"