"""Tests for fail2ban_db_utils module."""

from app.utils.fail2ban_db_utils import escape_like


def test_escape_like_percent_sign() -> None:
    """Test escaping of percent signs (% wildcard)."""
    assert escape_like("10.0.0%") == "10.0.0\\%"


def test_escape_like_underscore() -> None:
    """Test escaping of underscores (_ wildcard)."""
    assert escape_like("10.0.0_1") == "10.0.0\\_1"


def test_escape_like_backslash() -> None:
    """Test escaping of backslashes."""
    assert escape_like("10.0.0\\") == "10.0.0\\\\"


def test_escape_like_combined_wildcards() -> None:
    """Test escaping when both % and _ are present."""
    assert escape_like("10.0_%") == "10.0\\_\\%"


def test_escape_like_combined_with_backslash() -> None:
    """Test escaping backslash first, then wildcards."""
    assert escape_like("10\\0_%") == "10\\\\0\\_\\%"


def test_escape_like_normal_ip() -> None:
    """Test that normal IPs pass through unchanged (dots are not wildcards)."""
    assert escape_like("10.0.0.1") == "10.0.0.1"


def test_escape_like_empty_string() -> None:
    """Test escaping empty string."""
    assert escape_like("") == ""


def test_escape_like_only_backslash() -> None:
    """Test string with only backslashes."""
    assert escape_like("\\\\") == "\\\\\\\\"


def test_escape_like_only_percent() -> None:
    """Test string with only percent signs."""
    assert escape_like("%%%") == "\\%\\%\\%"


def test_escape_like_only_underscore() -> None:
    """Test string with only underscores."""
    assert escape_like("___") == "\\_\\_\\_"


def test_escape_like_backslash_before_wildcard() -> None:
    """Test that backslash before wildcard is properly escaped."""
    result = escape_like("10\\_%")
    # Expected: backslash → \\ , underscore → \_ , percent → \%
    assert result == "10\\\\\\_\\%"