# Copyright 2023 Memgraph Ltd.
#
# Use of this software is governed by the Business Source License
# included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
# License, and you may not use this file except in compliance with the Business Source License.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0, included in the file
# licenses/APL.txt.

import sys

import pytest
from common import connect, execute_and_fetch_all


def check_storage_info(cursor, expected_values):
    cursor.execute("SHOW STORAGE INFO")
    config = cursor.fetchall()

    for conf in config:
        conf_name = conf[0]
        if conf_name in expected_values:
            assert expected_values[conf_name] == conf[1]


def test_analytical_mode_objects_are_actually_deleted_when_asked(connect):
    """Tests objects are actually freed when deleted in analytical mode."""

    expected_values = {
        "vertex_count": 0,
    }

    cursor = connect.cursor()
    check_storage_info(cursor, expected_values)

    cursor.execute("STORAGE MODE IN_MEMORY_ANALYTICAL;")
    cursor.execute("MERGE (n) DELETE n;")
    cursor.execute("FREE MEMORY;")

    check_storage_info(cursor, expected_values)


def test_analytical_mode_objects_are_actually_deleted_when_storage_mode_changes(connect):
    """Tests objects are actually freed when deleted in analytical mode."""

    expected_values = {
        "vertex_count": 0,
    }

    cursor = connect.cursor()
    check_storage_info(cursor, expected_values)

    cursor.execute("STORAGE MODE IN_MEMORY_ANALYTICAL;")
    cursor.execute("MERGE (n) DELETE n;")
    cursor.execute("STORAGE MODE IN_MEMORY_TRANSACTIONAL;")

    check_storage_info(cursor, expected_values)


if __name__ == "__main__":
    sys.exit(pytest.main([__file__, "-rA"]))