kindly-guard-server 0.11.14

// Copyright 2025 Kindly Software Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Enhanced implementation modules
//! Provides high-performance alternatives to standard implementations

// Enhanced implementations for high-performance scenarios
// Reserved for v2.0: pub mod hierarchical_rate_limiter;

// Enhanced event buffer with advanced features
// Reserved for v2.0: pub use hierarchical_rate_limiter::HierarchicalRateLimiter;

use crate::config::Config;
use crate::traits::{
    CircuitBreakerWrapper, CorrelationEngine, DynCircuitBreaker, DynRetryStrategy, EnhancedScanner,
    EventBufferTrait, HealthCheckTrait, RateLimiter, RecoveryStrategyTrait, ResilienceFactory,
    RetryStrategyWrapper, SecurityComponentFactory, SecurityEventProcessor, SecurityScannerTrait,
};
use anyhow::Result;
use std::sync::Arc;
use std::time::Duration;

/// Create enhanced event buffer with specified configuration
pub fn create_enhanced_event_buffer(
    buffer_size_mb: usize,
    max_endpoints: u32,
) -> Result<impl EventBufferTrait> {
    // For now, create a simple implementation
    // The actual enhanced implementation would use advanced techniques
    #[allow(dead_code)]
    struct EnhancedEventBuffer {
        buffer_size_mb: usize,
        max_endpoints: u32,
    }

    impl EventBufferTrait for EnhancedEventBuffer {
        fn enqueue_event(
            &self,
            _endpoint_id: u32,
            _data: &[u8],
            _priority: crate::traits::Priority,
        ) -> Result<u64> {
            // Simple implementation - just return a sequential ID
            Ok(0) // In production, this would maintain state
        }

        fn get_endpoint_stats(&self, _endpoint_id: u32) -> Result<crate::traits::EndpointStats> {
            // Return default stats for enhanced implementation
            Ok(crate::traits::EndpointStats {
                success_count: 0,
                failure_count: 0,
                circuit_state: crate::traits::CircuitState::Closed,
                available_tokens: 100,
            })
        }
    }

    Ok(EnhancedEventBuffer {
        buffer_size_mb,
        max_endpoints,
    })
}

/// Enhanced component factory providing high-performance implementations
pub struct EnhancedComponentFactory;

impl SecurityComponentFactory for EnhancedComponentFactory {
    fn create_event_processor(
        &self,
        _config: &Config,
        storage: Arc<dyn crate::storage::StorageProvider>,
    ) -> Result<Arc<dyn SecurityEventProcessor>> {
        // For now, return standard implementation
        // TODO: Implement enhanced event processor
        Ok(Arc::new(crate::standard_impl::StandardEventProcessor::new(
            storage,
        )))
    }

    fn create_scanner(&self, _config: &Config) -> Result<Arc<dyn EnhancedScanner>> {
        // For now, return standard implementation
        // TODO: Implement enhanced scanner
        Ok(Arc::new(crate::standard_impl::StandardScanner::new()))
    }

    fn create_correlation_engine(
        &self,
        _config: &Config,
        _storage: Arc<dyn crate::storage::StorageProvider>,
    ) -> Result<Arc<dyn CorrelationEngine>> {
        // For now, return standard implementation
        // TODO: Implement enhanced correlation engine
        Ok(Arc::new(
            crate::standard_impl::StandardCorrelationEngine::new(),
        ))
    }

    fn create_rate_limiter(
        &self,
        _config: &Config,
        storage: Arc<dyn crate::storage::StorageProvider>,
    ) -> Result<Arc<dyn RateLimiter>> {
        // For v1.0, use standard rate limiter for stability
        // TODO: Enable hierarchical rate limiter in v2.0 for enterprise customers
        tracing::info!(
            target: "performance.rate_limit",
            mode = "standard",
            "Initializing standard rate limiter"
        );

        Ok(Arc::new(crate::standard_impl::StandardRateLimiter::new(
            storage, 1000, // max_tokens
            100,  // refill_rate
        )))
    }

    fn create_security_scanner(&self, config: &Config) -> Result<Arc<dyn SecurityScannerTrait>> {
        // Use existing scanner factory
        Ok(crate::scanner::create_security_scanner(&config.scanner))
    }
}

impl ResilienceFactory for EnhancedComponentFactory {
    fn create_circuit_breaker(&self, config: &Config) -> Result<Arc<dyn DynCircuitBreaker>> {
        // For now, return standard implementation wrapped
        let circuit_config = crate::resilience::circuit_breaker::CircuitBreakerConfig {
            failure_threshold: config.resilience.circuit_breaker.failure_threshold,
            failure_window: Duration::from_secs(60), // Default 1 minute window
            success_threshold: 0.8,                  // 80% success rate required
            recovery_timeout: config.resilience.circuit_breaker.recovery_timeout,
            request_timeout: Duration::from_secs(30), // Default 30s timeout
            half_open_max_requests: config.resilience.circuit_breaker.half_open_max_requests,
        };
        let inner = crate::resilience::standard::StandardCircuitBreaker::new(circuit_config);
        Ok(Arc::new(CircuitBreakerWrapper::new(inner)))
    }

    fn create_retry_strategy(&self, config: &Config) -> Result<Arc<dyn DynRetryStrategy>> {
        // For now, return standard implementation wrapped
        let retry_config = crate::resilience::retry::RetryConfig {
            max_attempts: config.resilience.retry.max_attempts,
            initial_delay: config.resilience.retry.initial_delay,
            max_delay: config.resilience.retry.max_delay,
            multiplier: 2.0, // Default exponential backoff
            jitter_factor: config.resilience.retry.jitter_factor,
            timeout: Some(Duration::from_secs(60)), // Default 60s total timeout
        };
        let inner = crate::resilience::standard::StandardRetryStrategy::new(retry_config);
        Ok(Arc::new(RetryStrategyWrapper::new(inner)))
    }

    fn create_health_checker(&self, _config: &Config) -> Result<Arc<dyn HealthCheckTrait>> {
        // For now, return standard implementation
        Ok(Arc::new(
            crate::resilience::standard::StandardHealthChecker::new(),
        ))
    }

    fn create_recovery_strategy(&self, _config: &Config) -> Result<Arc<dyn RecoveryStrategyTrait>> {
        // For now, return standard implementation
        Ok(Arc::new(
            crate::resilience::standard::StandardRecoveryStrategy::new(),
        ))
    }

    fn create_bulkhead(&self, config: &Config) -> Result<Arc<dyn crate::resilience::DynBulkhead>> {
        use crate::resilience::bulkhead::{BulkheadWrapper, StandardBulkhead};

        #[cfg(feature = "enhanced")]
        {
            use crate::resilience::bulkhead::EnhancedBulkhead;
            let bulkhead = EnhancedBulkhead::from_config(config);
            Ok(Arc::new(BulkheadWrapper::new(bulkhead)))
        }
        #[cfg(not(feature = "enhanced"))]
        {
            let bulkhead = StandardBulkhead::from_config(config);
            Ok(Arc::new(BulkheadWrapper::new(bulkhead)))
        }
    }
}