#!/usr/bin/env python
#     Copyright 2022, Kay Hayen, mailto:kay.hayen@gmail.com
#
#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
#

""" Tool to compare reference counting behaviour of CPython and Nuitka.

"""

import os
import sys
from optparse import OptionParser

from nuitka.PythonVersions import isDebugPython
from nuitka.tools.testing.Common import checkReferenceCount, getTempDir
from nuitka.Tracing import my_print
from nuitka.utils.Execution import check_call
from nuitka.utils.Importing import importFileAsModule


def main():
    parser = OptionParser()

    parser.add_option(
        "--checked-module",
        action="store",
        dest="checked_module",
        help="""\
Module with main() function to be checked for reference count stability.""",
    )

    parser.add_option(
        "--explain",
        action="store_true",
        dest="explain",
        default=False,
        help="""\
Try to explain the differences by comparing object counts.""",
    )

    options, positional_args = parser.parse_args()

    if positional_args and options.checked_module is None:
        options.checked_module = positional_args.pop()

    if positional_args and options.checked_module:
        parser.print_help()

        sys.exit("\nError, no positional argument allowed.")

    # First with pure Python.
    checked_module = importFileAsModule(options.checked_module)
    my_print("Using %s" % checked_module.main, style="blue")
    checkReferenceCount(checked_module.main, explain=options.explain)

    temp_dir = getTempDir()
    command = [
        sys.executable,
        "-m",
        "nuitka",
        "--module",
        options.checked_module,
        "--output-dir=%s" % temp_dir,
    ]

    if isDebugPython():
        command.append("--python-debug")

    check_call(command)

    module_name = os.path.basename(options.checked_module).split(".")[0]

    sys.path.insert(0, temp_dir)
    checked_module = __import__(module_name)

    my_print("Using %s" % checked_module.main, style="blue")
    checkReferenceCount(checked_module.main)


if __name__ == "__main__":
    nuitka_package_dir = os.path.normpath(
        os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "..", ".."))
    )

    # Unchanged, running from checkout, use the parent directory, the nuitka
    # package ought be there.
    sys.path.insert(0, nuitka_package_dir)

    main()
