#!/bin/bash
# Copyright (c) 2026 ModalAI Inc.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# 4. The Software is used solely in conjunction with devices provided by
#    ModalAI Inc.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# POSSIBILITY OF SUCH DAMAGE.
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# For a license to use on non-ModalAI hardware, please contact license@modalai.com

# Runs voxl-camera-core-test with voxl-camera-server stopped, since the camera devices
# allow one user, and puts the service back as it was whatever the test does. Every
# argument goes to the test (--help lists them).

set -u

readonly SERVICE=voxl-camera-server
readonly TEST="$(dirname "$(readlink -f "$0")")/voxl-camera-core-test"

was_active=0
if systemctl is-active --quiet "$SERVICE"; then
    was_active=1
fi

restore() {
    if [ "$was_active" -eq 1 ]; then
        # Repeated restarts during testing can trip the unit's start limit.
        systemctl reset-failed "$SERVICE" 2>/dev/null
        systemctl start "$SERVICE" || echo "could not restart $SERVICE" >&2
    fi
}
trap restore EXIT

if [ "$was_active" -eq 1 ] && ! systemctl stop "$SERVICE"; then
    echo "could not stop $SERVICE" >&2
    exit 2
fi

# The service comes back only after the test exits: a signal here is passed on to it, and
# the test stops its child, restores the frame-sync pulse and reports before exiting. The
# trap exists before the test starts, so no signal can end this script alone.
test_pid=""
trap '[ -n "$test_pid" ] && kill -TERM "$test_pid" 2>/dev/null' INT TERM HUP
"$TEST" "$@" &
test_pid=$!
wait "$test_pid"
status=$?
# A trapped signal ends the wait early (status above 128) while the test is still cleaning up.
while [ "$status" -gt 128 ] && kill -0 "$test_pid" 2>/dev/null; do
    wait "$test_pid"
    status=$?
done
exit "$status"
