#!/bin/bash
#
# Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
#
# SPDX-License-Identifier: LGPL-2.1-only

TEST_DESC="Triggers - Start and stop actions"

CURDIR=$(dirname "$0")/
TESTDIR=${CURDIR}/../../../..

# shellcheck source=../../../../utils/utils.sh
source "$TESTDIR/utils/utils.sh"

TESTAPP_PATH="$TESTDIR/utils/testapp"
GEN_UST_EVENTS_TESTAPP_NAME="gen-ust-events"
GEN_UST_EVENTS_TESTAPP_BIN="$TESTAPP_PATH/$GEN_UST_EVENTS_TESTAPP_NAME/$GEN_UST_EVENTS_TESTAPP_NAME"
FULL_LTTNG_BIN="$TESTDIR/../src/bin/lttng/$LTTNG_BIN"
NOTIFICATION_CLIENT_BIN="$CURDIR/../utils/notification-client"
NUM_TESTS=18

NR_ITER=5
NR_USEC_WAIT=5

function lttng_session_is_active()
{
	local SESSION_NAME="$1"
	"$FULL_LTTNG_BIN" list "$SESSION_NAME" | grep "Tracing session" | grep -q "\[active\]"

	ok $ret "Session \"$SESSION_NAME\" is active"
}

function lttng_session_is_inactive()
{
	local SESSION_NAME="$1"
	"$FULL_LTTNG_BIN" list "$SESSION_NAME" | grep "Tracing session" | grep -q "\[inactive\]"

	ok $ret "Session \"$SESSION_NAME\" is inactive"
}

function test_start_session_action()
{
	local SESSION_NAME="my_triggered_session"
	local TRIGGER_NAME="trigger1"
	local TRACE_PATH=$(mktemp -d test-start-action-trace.XXXXXX)
	local SYNC_AFTER_NOTIF_REGISTER_PATH=$(mktemp -u test-notif-register.XXXXXX)

	diag "Start session action"

	create_lttng_session_ok $SESSION_NAME "$TRACE_PATH"

	enable_ust_lttng_event_ok $SESSION_NAME "tp:tptest"

	lttng_session_is_inactive $SESSION_NAME

	# Add `start-session` action to an event-rule condition _followed_ by
	# a `notify` action.
	lttng_add_trigger_ok \
		$TRIGGER_NAME \
		--condition event-rule-matches -u --name=tp:tptest \
		--action start-session $SESSION_NAME \
		--action notify

	# Launch notification listener.
	$NOTIFICATION_CLIENT_BIN \
		--trigger $TRIGGER_NAME \
		--sync-after-notif-register "$SYNC_AFTER_NOTIF_REGISTER_PATH" &
	notif_client_pid=$!

	while [ ! -f "${SYNC_AFTER_NOTIF_REGISTER_PATH}" ]; do
		sleep 0.5
	done

	# Artificially produce the desired event-rule condition.
	$GEN_UST_EVENTS_TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT > /dev/null 2>&1

	# notification-client will exit once it receives a notification.
	wait $notif_client_pid
	test "$?" -eq "0"
	ok $? "notification client exited successfully"

	# Test that the session has started.
	lttng_session_is_active $SESSION_NAME

	# Tearing down.
	lttng_remove_trigger_ok $TRIGGER_NAME
	stop_lttng_tracing_ok $SESSION_NAME
	destroy_lttng_session_ok $SESSION_NAME

	rm -f "$SYNC_AFTER_NOTIF_REGISTER_PATH"
	rm -rf "$TRACE_PATH"
}

function test_stop_session_action()
{
	local SESSION_NAME="my_triggered_session"
	local TRIGGER_NAME="trigger1"
	local TRACE_PATH=$(mktemp -d test-stop-action-trace.XXXXXX)
	local SYNC_AFTER_NOTIF_REGISTER_PATH=$(mktemp -u test-notif-register.XXXXXX)

	diag "Stop session action"
	create_lttng_session_ok $SESSION_NAME "$TRACE_PATH"

	enable_ust_lttng_event_ok $SESSION_NAME "tp:tptest"

	start_lttng_tracing_ok $SESSION_NAME

	lttng_session_is_active $SESSION_NAME

	# Add `stop-session` action to an event-rule condition _followed_ by
	# a `notify` action.
	lttng_add_trigger_ok \
		$TRIGGER_NAME \
		--condition event-rule-matches -u --name=tp:tptest \
		--action stop-session $SESSION_NAME \
		--action notify

	# Launch notification listener.
	$NOTIFICATION_CLIENT_BIN \
		--trigger $TRIGGER_NAME \
		--sync-after-notif-register "$SYNC_AFTER_NOTIF_REGISTER_PATH" &
	notif_client_pid=$!

	while [ ! -f "${SYNC_AFTER_NOTIF_REGISTER_PATH}" ]; do
		sleep 0.5
	done

	# Artificially produce the desired event-rule condition.
	$GEN_UST_EVENTS_TESTAPP_BIN -i $NR_ITER -w $NR_USEC_WAIT > /dev/null 2>&1

	# notification-client will exit once it receives a notification.
	wait $notif_client_pid
	test "$?" -eq "0"
	ok $? "notification client exited successfully"

	# Test that the session has been stopped.
	lttng_session_is_inactive $SESSION_NAME

	# Tearing down.
	lttng_remove_trigger_ok $TRIGGER_NAME
	destroy_lttng_session_ok $SESSION_NAME

	rm -f "$SYNC_AFTER_NOTIF_REGISTER_PATH"
	rm -rf "$TRACE_PATH"
}

 # MUST set TESTDIR before calling those functions
plan_tests $NUM_TESTS

print_test_banner "$TEST_DESC"

start_lttng_sessiond_notap

test_start_session_action
test_stop_session_action

stop_lttng_sessiond_notap