#!/usr/bin/env python3
#
# SPDX-FileCopyrightText: 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
#
# SPDX-License-Identifier: GPL-2.0-only

import uuid
import os
import subprocess
import re
import shutil
import sys

test_path = os.path.dirname(os.path.abspath(__file__)) + "/"
test_utils_path = test_path
for i in range(4):
    test_utils_path = os.path.dirname(test_utils_path)
test_utils_path = test_utils_path + "/utils"
sys.path.append(test_utils_path)
from test_utils import *


NR_TESTS = 6
current_test = 1
print("1..{0}".format(NR_TESTS))

# Check if a sessiond is running... bail out if none found.
if session_daemon_alive() == 0:
    bail(
        'No sessiond running. Please make sure you are running this test with the "run" shell script and verify that the lttng tools are properly installed.'
    )

session_info = create_session()
enable_ust_tracepoint_event(session_info, "*")
start_session(session_info)


parent_pid = None
daemon_pid = None
daemon_process = subprocess.Popen(test_path + "daemon", stdout=subprocess.PIPE)
for line in daemon_process.stdout:
    name, pid = line.decode("utf-8").split()
    if name == "child_pid":
        daemon_pid = int(pid)
    if name == "parent_pid":
        parent_pid = int(pid)

daemon_process_return_code = daemon_process.wait()

if parent_pid is None or daemon_pid is None:
    bail(
        "Unexpected output received from daemon test executable."
        + str(daemon_process_output)
    )

print_test_result(
    daemon_process_return_code == 0,
    current_test,
    "Successful call to daemon() and normal exit",
)
current_test += 1

if daemon_process_return_code != 0:
    bail("Could not trigger tracepoints successfully. Abandoning test.")

stop_session(session_info)

try:
    babeltrace_process = subprocess.Popen(
        [BABELTRACE_BIN, session_info.trace_path], stdout=subprocess.PIPE
    )
except FileNotFoundError:
    bail("Could not open {}. Please make sure it is installed.".format(BABELTRACE_BIN))

before_daemon_event_found = False
before_daemon_event_pid = -1
after_daemon_event_found = False
after_daemon_event_pid = -1

for event_line in babeltrace_process.stdout:
    event_line = event_line.decode("utf-8").replace("\n", "")

    if re.search(r"before_daemon", event_line) is not None:
        if before_daemon_event_found:
            bail(
                "Multiple instances of the before_daemon event found. Please make sure only one instance of this test is runnning."
            )
        before_daemon_event_found = True
        match = re.search(r"(?<=pid = )\d+", event_line)

        if match is not None:
            before_daemon_event_pid = int(match.group(0))

    if re.search(r"after_daemon", event_line) is not None:
        if after_daemon_event_found:
            bail(
                "Multiple instances of the after_daemon event found. Please make sure only one instance of this test is runnning."
            )
        after_daemon_event_found = True
        match = re.search(r"(?<=pid = )\d+", event_line)

        if match is not None:
            after_daemon_event_pid = int(match.group(0))
babeltrace_process.wait()

print_test_result(
    babeltrace_process.returncode == 0, current_test, "Resulting trace is readable"
)
current_test += 1

if babeltrace_process.returncode != 0:
    bail("Unreadable trace; can't proceed with analysis.")

print_test_result(
    before_daemon_event_found,
    current_test,
    "before_daemon event found in resulting trace",
)
current_test += 1
print_test_result(
    before_daemon_event_pid == parent_pid,
    current_test,
    "Parent pid reported in trace is correct",
)
current_test += 1
print_test_result(
    before_daemon_event_found,
    current_test,
    "after_daemon event found in resulting trace",
)
current_test += 1
print_test_result(
    after_daemon_event_pid == daemon_pid,
    current_test,
    "Daemon pid reported in trace is correct",
)
current_test += 1

shutil.rmtree(session_info.tmp_directory)