"""Tests for password strength validation."""

from local_deep_research.security.password_validator import PasswordValidator


class TestPasswordValidator:
    """Unit tests for PasswordValidator.validate_strength."""

    def test_valid_password(self):
        errors = PasswordValidator.validate_strength("strongp4ss")
        assert errors == []

    def test_too_short(self):
        errors = PasswordValidator.validate_strength("ab1")
        assert any("8 characters" in e for e in errors)

    def test_missing_lowercase(self):
        errors = PasswordValidator.validate_strength("UPPERCASE1")
        assert any("lowercase" in e for e in errors)

    def test_missing_digit(self):
        errors = PasswordValidator.validate_strength("nodigitshere")
        assert any("digit" in e for e in errors)

    def test_multiple_errors_for_weak_password(self):
        errors = PasswordValidator.validate_strength("abc")
        # Should flag: too short, no digit
        assert len(errors) >= 2

    def test_exactly_8_chars_valid(self):
        errors = PasswordValidator.validate_strength("abcdef1x")
        assert errors == []

    def test_7_chars_invalid(self):
        errors = PasswordValidator.validate_strength("abcde1x")
        assert any("8 characters" in e for e in errors)

    def test_special_chars_allowed(self):
        errors = PasswordValidator.validate_strength("p@ssw0rd!")
        assert errors == []

    def test_very_long_password_valid(self):
        errors = PasswordValidator.validate_strength("a1" + "a" * 200)
        assert errors == []

    def test_get_requirements_returns_non_empty_list(self):
        reqs = PasswordValidator.get_requirements()
        assert isinstance(reqs, list)
        assert len(reqs) > 0
        assert all(isinstance(r, str) for r in reqs)

    def test_get_requirements_count_matches_validate_strength_checks(self):
        """The number of requirements should match the number of checks
        in validate_strength (one error per check when all fail)."""
        reqs = PasswordValidator.get_requirements()
        # Empty string fails every check
        errors = PasswordValidator.validate_strength("")
        assert len(reqs) == len(errors)