"""Cross-provider IAM username derivation contracts (#2390)."""
from __future__ import annotations

import pytest

from app.integrations.drivers.aliyun_cloud import AliyunCloudDriver
from app.integrations.drivers.aws_cloud import AwsCloudDriver
from app.integrations.drivers.tencent_cloud import TencentCloudDriver
from app.integrations.drivers.ucloud_cloud import UCloudDriver


@pytest.mark.parametrize(
    ("derive", "expected"),
    [
        (AwsCloudDriver._iam_user_name_for, "helix-85c2eab1975f"),
        (AliyunCloudDriver._ram_user_name_for, "helix-85c2eab1975f"),
        (TencentCloudDriver._cam_user_name_for, "helix-85c2eab1975f"),
        (UCloudDriver._user_name_for, "helix-85c2eab1975f"),
    ],
)
def test_cjk_local_part_uses_stable_ascii_fallback(derive, expected):
    # ``str.isalnum`` accepts CJK. Provider usernames do not, so the filter
    # must explicitly require ASCII before deciding whether fallback is needed.
    first = derive(None, "张三@example.com")
    second = derive(None, "张三@example.com")

    assert first == expected
    assert second == expected
    assert first.isascii()


@pytest.mark.parametrize(
    ("derive", "expected"),
    [
        (AwsCloudDriver._iam_user_name_for, "alice.smith+ops"),
        (AliyunCloudDriver._ram_user_name_for, "Alice.Smithops"),
        (TencentCloudDriver._cam_user_name_for, "Alice.Smithops"),
        (UCloudDriver._user_name_for, "alicesmithops"),
    ],
)
def test_ascii_username_contract_is_unchanged(derive, expected):
    assert derive(None, "Alice.Smith+ops@example.com") == expected


@pytest.mark.parametrize(
    ("derive", "expected"),
    [
        (AwsCloudDriver._iam_user_name_for, "a.+tag"),
        (AliyunCloudDriver._ram_user_name_for, "a.tag"),
        (TencentCloudDriver._cam_user_name_for, "a.tag"),
        (UCloudDriver._user_name_for, "atag"),
    ],
)
def test_mixed_unicode_keeps_only_provider_allowed_ascii(derive, expected):
    assert derive(None, "张a.三+tag@example.com") == expected