"""Test specifications for security architecture."""

from typing import Any, Protocol


# Security component interfaces (for TDD)
class SqlInjectionPrevention(Protocol):
    """Interface for SQL injection prevention."""

    def validate_query(self, query: str) -> bool:
        """Validate query for SQL injection attempts."""
        ...

    def sanitize_parameters(self, params: list) -> list:
        """Sanitize query parameters."""
        ...


class QueryFilter(Protocol):
    """Interface for query filtering."""

    def is_allowed(self, query: str) -> tuple[bool, str]:
        """Check if query is allowed by filters."""
        ...


class RateLimiter(Protocol):
    """Interface for rate limiting."""

    async def check_rate_limit(self, client_id: str) -> tuple[bool, str]:
        """Check if request is within rate limits."""
        ...


class SecurityManager(Protocol):
    """Main security manager interface."""

    async def validate_request(
        self, query: str, params: list | None = None, client_id: str | None = None
    ) -> tuple[bool, str]:
        """Validate request through all security layers."""
        ...


class TestSecurityArchitecture:
    """Test security architecture design."""

    def test_security_manager_interface(self):
        """Test that SecurityManager properly coordinates all security components."""

        # This test defines the expected interface
        class MockSecurityManager:
            def __init__(
                self,
                sql_injection: SqlInjectionPrevention,
                query_filter: QueryFilter,
                rate_limiter: RateLimiter,
            ):
                self.sql_injection = sql_injection
                self.query_filter = query_filter
                self.rate_limiter = rate_limiter

            async def validate_request(
                self,
                query: str,
                params: list | None = None,
                client_id: str | None = None,
            ) -> tuple[bool, str]:
                # 1. Check rate limit first (fail fast)
                if client_id:
                    allowed, reason = await self.rate_limiter.check_rate_limit(
                        client_id
                    )
                    if not allowed:
                        return False, f"Rate limit exceeded: {reason}"

                # 2. Validate SQL injection
                if not self.sql_injection.validate_query(query):
                    return False, "SQL injection detected"

                # 3. Check query filters
                allowed, reason = self.query_filter.is_allowed(query)
                if not allowed:
                    return False, f"Query blocked by filter: {reason}"

                return True, "OK"

    def test_security_configuration_schema(self):
        """Test security configuration structure."""
        expected_config = {
            "sql_injection": {
                "enabled": True,
                "strict_mode": True,
                "allowed_functions": ["COUNT", "SUM", "AVG"],
                "blocked_functions": ["LOAD_FILE", "OUTFILE", "DUMPFILE"],
            },
            "query_filter": {
                "enabled": True,
                "mode": "whitelist",  # or "blacklist"
                "whitelist_tables": ["users", "orders", "products"],
                "blacklist_tables": ["passwords", "api_keys"],
                "whitelist_patterns": ["^SELECT\\s+.*"],
                "blacklist_patterns": [".*information_schema.*"],
            },
            "rate_limiting": {
                "enabled": True,
                "per_minute": 60,
                "per_hour": 1000,
                "burst_size": 20,
                "concurrent_queries": 10,
                "cooldown_seconds": 60,
            },
            "audit_logging": {
                "enabled": True,
                "log_successful": False,
                "log_blocked": True,
                "log_errors": True,
                "include_parameters": False,
            },
        }

        # This structure should be used for configuration
        assert isinstance(expected_config, dict)

    def test_security_middleware_chain(self):
        """Test security middleware chain design."""
        # Expected middleware execution order

        # Each middleware should have consistent interface
        class SecurityMiddleware:
            async def process(
                self, request: dict[str, Any], next_handler
            ) -> dict[str, Any]:
                # Pre-processing
                # ...

                # Call next middleware
                response = await next_handler(request)

                # Post-processing
                # ...

                return response

    def test_security_error_types(self):
        """Test security-specific error types."""

        # Define expected error hierarchy
        class SecurityError(Exception):
            """Base security error."""

            pass

        class SqlInjectionError(SecurityError):
            """SQL injection detected."""

            pass

        class RateLimitError(SecurityError):
            """Rate limit exceeded."""

            def __init__(self, retry_after: int):
                self.retry_after = retry_after

        class QueryFilterError(SecurityError):
            """Query blocked by filter."""

            def __init__(self, filter_type: str, pattern: str):
                self.filter_type = filter_type
                self.pattern = pattern

        # Test error creation
        error = RateLimitError(retry_after=60)
        assert error.retry_after == 60

    def test_security_context(self):
        """Test security context for request tracking."""

        class SecurityContext:
            """Security context for a request."""

            def __init__(
                self,
                request_id: str,
                client_id: str | None = None,
                tenant_id: str | None = None,
                ip_address: str | None = None,
            ):
                self.request_id = request_id
                self.client_id = client_id
                self.tenant_id = tenant_id
                self.ip_address = ip_address
                self.start_time = None
                self.security_checks = []

            def add_check(self, check_name: str, passed: bool, reason: str = ""):
                """Record security check result."""
                self.security_checks.append(
                    {
                        "check": check_name,
                        "passed": passed,
                        "reason": reason,
                        "timestamp": "...",
                    }
                )

        # Test context usage
        ctx = SecurityContext("req-123", client_id="client-1")
        ctx.add_check("rate_limit", True)
        ctx.add_check("sql_injection", False, "Multiple statements detected")

        assert len(ctx.security_checks) == 2
        assert not ctx.security_checks[1]["passed"]

    def test_security_metrics_interface(self):
        """Test security metrics collection interface."""

        class SecurityMetrics:
            """Interface for security metrics."""

            def __init__(self):
                self.counters = {}
                self.timers = {}

            def increment(self, metric: str, value: int = 1, tags: dict | None = None):
                """Increment a counter metric."""
                pass

            def timing(self, metric: str, duration: float, tags: dict | None = None):
                """Record a timing metric."""
                pass

            def gauge(self, metric: str, value: float, tags: dict | None = None):
                """Set a gauge metric."""
                pass

        # Expected metrics to collect

    def test_security_plugin_system(self):
        """Test extensible security plugin system."""

        class SecurityPlugin:
            """Base class for security plugins."""

            def __init__(self, config: dict[str, Any]):
                self.config = config
                self.enabled = config.get("enabled", True)

            async def initialize(self):
                """Initialize the plugin."""
                pass

            async def validate(self, request: dict[str, Any]) -> tuple[bool, str]:
                """Validate request."""
                raise NotImplementedError

        # Example custom plugin
        class CustomBlacklistPlugin(SecurityPlugin):
            """Custom blacklist plugin."""

            async def validate(self, request: dict[str, Any]) -> tuple[bool, str]:
                query = request.get("query", "")
                for blocked in self.config.get("blocked_terms", []):
                    if blocked in query.lower():
                        return False, f"Blocked term: {blocked}"
                return True, "OK"

    def test_security_testing_utilities(self):
        """Test utilities for security testing."""

        class SecurityTestUtils:
            """Utilities for testing security features."""

            @staticmethod
            def generate_sql_injection_payloads() -> list[str]:
                """Generate common SQL injection test payloads."""
                return [
                    "' OR '1'='1",
                    "'; DROP TABLE users; --",
                    "1' UNION SELECT * FROM passwords--",
                    "admin'--",
                    "1' AND SLEEP(5)--",
                ]

            @staticmethod
            def generate_safe_queries() -> list[str]:
                """Generate safe query examples."""
                return [
                    "SELECT * FROM users WHERE id = %s",
                    "INSERT INTO logs (message) VALUES (%s)",
                    "UPDATE users SET last_login = NOW() WHERE id = %s",
                ]

            @staticmethod
            async def simulate_attack(
                security_manager: SecurityManager, attack_type: str = "sql_injection"
            ) -> dict[str, Any]:
                """Simulate various attack scenarios."""
                # Implementation would simulate attacks and return results
                pass
