"""
Unit tests for authentication router.

Tests authentication endpoints including:
- User registration
- Login
- Token refresh
- Logout
- Password reset
- MFA/TOTP
"""

import pytest


@pytest.mark.unit
class TestUserRegistration:
    """Tests for user registration endpoint"""

    def test_register_success(self):
        """Test successful user registration"""
        # Arrange

        # Assert registration should succeed with valid input

    def test_register_missing_required_field(self):
        """Test registration fails with missing required fields"""

        # Assert should return 422 validation error

    def test_register_weak_password(self):
        """Test registration fails with weak password"""

        # Assert should return 400 with password validation error

    def test_register_duplicate_username(self):
        """Test registration fails with duplicate username"""
        # First registration succeeds
        # Second with same username fails with 409 Conflict

    def test_register_invalid_email(self):
        """Test registration fails with invalid email"""

        # Assert should return 422


@pytest.mark.unit
class TestUserLogin:
    """Tests for login endpoint"""

    def test_login_success(self):
        """Test successful login"""
        # Register user, then login
        # Assert returns 200 with access_token and token_type

    def test_login_invalid_username(self):
        """Test login fails with invalid username"""
        # Assert returns 401 Unauthorized

    def test_login_invalid_password(self):
        """Test login fails with wrong password"""
        # Assert returns 401 Unauthorized

    def test_login_case_insensitive_username(self):
        """Test login with different case username"""
        # Assert should succeed

    def test_login_rate_limited(self):
        """Test login is rate limited after failures"""
        # Multiple failed attempts should trigger rate limit


@pytest.mark.unit
class TestLogout:
    """Tests for logout endpoint"""

    def test_logout_success(self):
        """Test successful logout"""
        # Login, then logout with token
        # Assert returns 200

    def test_logout_without_authentication(self):
        """Test logout fails without token"""
        # Assert returns 401


@pytest.mark.unit
class TestPasswordReset:
    """Tests for password reset"""

    def test_request_password_reset(self):
        """Test requesting password reset"""
        # Assert returns 200

    def test_reset_with_invalid_email(self):
        """Test password reset with non-existent email"""
        # Should not reveal if email exists (security)
        # Assert returns 200


@pytest.mark.unit
class TestJWTTokenValidation:
    """Tests for JWT token validation"""

    def test_valid_token_accepted(self):
        """Test valid JWT token is accepted"""
        pass

    def test_expired_token_rejected(self):
        """Test expired JWT token is rejected"""
        pass

    def test_tampered_token_rejected(self):
        """Test tampered JWT token is rejected"""
        pass

    def test_missing_token_rejected(self):
        """Test missing token is rejected"""
        pass


@pytest.mark.unit
class TestAuthErrorHandling:
    """Tests for authentication error handling"""

    def test_user_friendly_error_messages(self):
        """Test error messages don't expose system details"""
        # Should not reveal whether username or password is wrong
        pass
