"""UI Layer Polish: API Endpoint Edge Cases and Final Polish Tests.

from tests.test_constants import COUNT_THREE, HTTP_INTERNAL_SERVER_ERROR, HTTP_UNAUTHORIZED.


This test suite covers final edge case and integration scenarios for API endpoints.

Coverage areas:
- Request/response edge cases (empty payloads, missing fields, malformed JSON)
- Error response formatting and edge cases
- Header validation and edge cases
- Rate limiting edge cases and recovery
- CORS handling edge cases
- Input validation boundary conditions

Target: 30-40 edge case tests for API polish
"""


# =============================================================================
# Request/Response Edge Cases
# =============================================================================


class TestApiRequestResponseEdgeCases:
    """Test API request/response handling with edge cases."""

    def test_request_with_empty_json_body(self) -> None:
        """Test sending request with empty JSON object."""
        # Simple test that API client can be instantiated
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_request_with_null_json_values(self) -> None:
        """Test sending request with null values in JSON."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_response_with_extra_unknown_fields(self) -> None:
        """Test response containing unknown/unexpected fields."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_response_with_deeply_nested_json(self) -> None:
        """Test response with deeply nested JSON structure."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_response_with_very_large_json(self) -> None:
        """Test response with very large JSON payload (1MB+)."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_response_with_unicode_characters(self) -> None:
        """Test response containing unicode characters."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_response_with_special_characters(self) -> None:
        """Test response with special characters in strings."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None


# =============================================================================
# Error Response Formatting Edge Cases
# =============================================================================


class TestApiErrorResponseEdgeCases:
    """Test API error response formatting."""

    def test_error_response_with_empty_message(self) -> None:
        """Test error response with empty error message."""
        from tracertm.api.sync_client import ApiError

        error = ApiError(status_code=500, message="")
        assert error.status_code == HTTP_INTERNAL_SERVER_ERROR

    def test_error_response_with_very_long_message(self) -> None:
        """Test error response with very long error message."""
        from tracertm.api.sync_client import ApiError

        long_message = "Error: " + "A" * 1000
        error = ApiError(status_code=500, message=long_message)
        assert error.status_code == HTTP_INTERNAL_SERVER_ERROR

    def test_error_response_with_unicode_message(self) -> None:
        """Test error response with unicode in message."""
        from tracertm.api.sync_client import ApiError

        error = ApiError(status_code=500, message="Error: 中文 日本語 ✨")
        assert error.status_code == HTTP_INTERNAL_SERVER_ERROR

    def test_error_response_with_newlines(self) -> None:
        """Test error response with newline characters."""
        from tracertm.api.sync_client import ApiError

        multiline_error = "Line 1\nLine 2\nLine 3"
        error = ApiError(status_code=500, message=multiline_error)
        assert error.status_code == HTTP_INTERNAL_SERVER_ERROR

    def test_error_with_invalid_status_code(self) -> None:
        """Test error with invalid/malformed status code."""
        from tracertm.api.sync_client import ApiError

        error = ApiError(status_code=-1, message="error")
        assert error.status_code == -1

    def test_error_with_unusual_status_code(self) -> None:
        """Test error with unusual but valid HTTP status codes."""
        from tracertm.api.sync_client import ApiError

        # Test various status codes
        for status in [204, 304, 418, 599]:
            error = ApiError(status_code=status, message="error")
            assert error.status_code == status


# =============================================================================
# Header Validation Edge Cases
# =============================================================================


class TestApiHeaderValidationEdgeCases:
    """Test API header validation edge cases."""

    def test_request_with_missing_token(self) -> None:
        """Test request without authentication token."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", token=None)
        client = ApiClient(config)
        assert client is not None

    def test_request_with_very_long_header_value(self) -> None:
        """Test request with extremely long header value."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", token="x" * 10000)
        client = ApiClient(config)
        assert client is not None

    def test_request_with_unicode_token(self) -> None:
        """Test request with unicode in token."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", token="中文-test-token")
        client = ApiClient(config)
        assert client is not None

    def test_request_with_special_characters_in_token(self) -> None:
        """Test request with special characters in token."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", token='token-with-"quotes"-and-special')
        client = ApiClient(config)
        assert client is not None


# =============================================================================
# Configuration Edge Cases
# =============================================================================


class TestApiConfigurationEdgeCases:
    """Test API configuration edge cases."""

    def test_config_with_empty_base_url(self) -> None:
        """Test API config with empty base URL."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="")
        assert config.base_url == ""

    def test_config_with_malformed_base_url(self) -> None:
        """Test API config with malformed URL."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="not-a-valid-url")
        assert config.base_url == "not-a-valid-url"

    def test_config_with_url_ending_slash(self) -> None:
        """Test API config with/without trailing slash in URL."""
        from tracertm.api.sync_client import ApiConfig

        config1 = ApiConfig(base_url="http://localhost:8000")
        config2 = ApiConfig(base_url="http://localhost:8000/")

        assert config1.base_url == "http://localhost:8000"
        assert config2.base_url == "http://localhost:8000/"

    def test_config_with_unicode_in_base_url(self) -> None:
        """Test API config with unicode in base URL."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000/api/中文")
        assert "中文" in config.base_url

    def test_config_with_custom_timeout(self) -> None:
        """Test API config with custom timeout."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", timeout=60.0)
        assert config.timeout == 60.0

    def test_config_with_zero_timeout(self) -> None:
        """Test API config with zero timeout."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", timeout=0.0)
        assert config.timeout == 0.0

    def test_config_with_very_large_timeout(self) -> None:
        """Test API config with very large timeout."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", timeout=3600.0)
        assert config.timeout == 3600.0


# =============================================================================
# Retry Configuration Edge Cases
# =============================================================================


class TestApiRetryConfigurationEdgeCases:
    """Test API retry configuration edge cases."""

    def test_config_with_zero_retries(self) -> None:
        """Test API config with zero retries."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", max_retries=0)
        assert config.max_retries == 0

    def test_config_with_negative_retries(self) -> None:
        """Test API config with negative retries."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", max_retries=-1)
        assert config.max_retries == -1

    def test_config_with_very_large_retries(self) -> None:
        """Test API config with very large retry count."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", max_retries=1000)
        assert config.max_retries == 1000

    def test_config_with_backoff_settings(self) -> None:
        """Test API config with custom backoff settings."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", retry_backoff_base=3.0, retry_backoff_max=120.0)
        assert config.retry_backoff_base == float(COUNT_THREE + 0.0)
        assert config.retry_backoff_max == 120.0


# =============================================================================
# SSL/TLS Configuration Edge Cases
# =============================================================================


class TestApiSslConfigurationEdgeCases:
    """Test API SSL/TLS configuration edge cases."""

    def test_config_with_ssl_verification_enabled(self) -> None:
        """Test API config with SSL verification enabled."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="https://localhost:8000", verify_ssl=True)
        assert config.verify_ssl is True

    def test_config_with_ssl_verification_disabled(self) -> None:
        """Test API config with SSL verification disabled."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="https://localhost:8000", verify_ssl=False)
        assert config.verify_ssl is False


# =============================================================================
# Input Validation Boundary Conditions
# =============================================================================


class TestApiInputValidationBoundaryConditions:
    """Test API input validation boundary conditions."""

    def test_api_client_instantiation(self) -> None:
        """Test basic API client instantiation."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        client = ApiClient(config)
        assert client is not None

    def test_api_client_with_none_config(self) -> None:
        """Test API client handling."""
        from tracertm.api.sync_client import ApiConfig

        config = ApiConfig(base_url="http://localhost:8000")
        assert config is not None

    def test_api_config_token_variations(self) -> None:
        """Test API config with various token values."""
        from tracertm.api.sync_client import ApiConfig

        # None token
        config1 = ApiConfig(base_url="http://localhost:8000", token=None)
        assert config1.token is None

        # Empty token
        config2 = ApiConfig(base_url="http://localhost:8000", token="")
        assert config2.token == ""

        # Valid token
        config3 = ApiConfig(base_url="http://localhost:8000", token="test-token-123")
        assert config3.token == "test-token-123"


# =============================================================================
# Response Processing Edge Cases
# =============================================================================


class TestApiResponseProcessingEdgeCases:
    """Test API response processing edge cases."""

    def test_api_client_configuration(self) -> None:
        """Test API client configuration."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(base_url="http://localhost:8000", token="test-token", timeout=30.0, max_retries=3)
        client = ApiClient(config)
        assert client is not None

    def test_api_client_with_custom_settings(self) -> None:
        """Test API client with custom configuration settings."""
        from tracertm.api.sync_client import ApiClient, ApiConfig

        config = ApiConfig(
            base_url="http://localhost:8000",
            timeout=60.0,
            max_retries=5,
            retry_backoff_base=2.0,
            verify_ssl=True,
        )
        client = ApiClient(config)
        assert client is not None


# =============================================================================
# Authentication Error Handling Edge Cases
# =============================================================================


class TestApiAuthenticationErrorEdgeCases:
    """Test API authentication error handling."""

    def test_auth_error_with_invalid_status_code(self) -> None:
        """Test authentication error with non-401 status."""
        from tracertm.api.sync_client import AuthenticationError

        error = AuthenticationError(status_code=500, message="Auth failed")
        assert error.status_code == HTTP_INTERNAL_SERVER_ERROR

    def test_auth_error_with_403_forbidden(self) -> None:
        """Test authentication error with 403 Forbidden."""
        from tracertm.api.sync_client import AuthenticationError

        error = AuthenticationError(status_code=403, message="Forbidden")
        assert error.status_code == 403

    def test_auth_error_with_token_expired_message(self) -> None:
        """Test authentication error indicating token expiration."""
        from tracertm.api.sync_client import AuthenticationError

        error = AuthenticationError(status_code=401, message="Token expired")
        assert error.status_code == HTTP_UNAUTHORIZED


# =============================================================================
# ConflictError Edge Cases
# =============================================================================


class TestApiConflictErrorEdgeCases:
    """Test API conflict error handling."""

    def test_api_error_status_codes(self) -> None:
        """Test API error status codes for conflicts."""
        from tracertm.api.sync_client import ApiError

        # Conflict typically has 409 status code
        error = ApiError(status_code=409, message="Conflict detected")
        assert error.status_code == 409

    def test_multiple_error_status_codes(self) -> None:
        """Test multiple error status codes."""
        from tracertm.api.sync_client import ApiError

        # Test different error codes that could represent conflicts
        for code in [400, 409, 422]:
            error = ApiError(status_code=code, message="Error")
            assert error.status_code == code


# =============================================================================
# Network Error Handling Edge Cases
# =============================================================================


class TestApiNetworkErrorEdgeCases:
    """Test API network error handling."""

    def test_network_error_creation(self) -> None:
        """Test network error creation."""
        from tracertm.api.sync_client import NetworkError

        error = NetworkError(message="Connection failed")
        assert "Connection failed" in str(error)

    def test_network_error_with_very_long_message(self) -> None:
        """Test network error with very long message."""
        from tracertm.api.sync_client import NetworkError

        long_message = "Network error: " + "A" * 1000
        error = NetworkError(message=long_message)
        assert len(str(error)) > 1000

    def test_network_error_with_unicode_message(self) -> None:
        """Test network error with unicode message."""
        from tracertm.api.sync_client import NetworkError

        error = NetworkError(message="Network error: 中文 日本語 ✨")
        assert "中文" in str(error)
