//! Advanced memory management and performance optimization tests
//! Following TDD principles and ADR-001: Test-Driven Development

use super::*;

#[cfg(test)]
mod advanced_memory_tests {
    use super::*;
    
    // Test 1: Memory pressure detection
    #[test]
    fn test_memory_pressure_detection() {
        let manager = SignalMemoryManager::with_memory_limit(1024); // 1KB limit
        
        // This should fail initially - we need to implement memory pressure detection
        let pressure_detected = manager.detect_memory_pressure();
        assert!(pressure_detected.is_some());
    }
    
    // Test 2: Automatic cleanup on memory pressure
    #[test]
    fn test_automatic_cleanup_on_pressure() {
        let manager = SignalMemoryManager::with_memory_limit(512); // 512B limit
        
        // Create multiple groups to trigger memory pressure
        for i in 0..10 {
            let group_name = format!("group-{}", i);
            manager.create_group(group_name).unwrap();
        }
        
        // This should fail initially - we need to implement automatic cleanup
        let cleanup_performed = manager.perform_automatic_cleanup();
        assert!(cleanup_performed);
    }
    
    // Test 3: Memory usage prediction
    #[test]
    fn test_memory_usage_prediction() {
        let manager = SignalMemoryManager::new();
        
        // This should fail initially - we need to implement prediction
        let predicted_usage = manager.predict_memory_usage(5, 3); // 5 signals, 3 memos
        assert!(predicted_usage > 0);
    }
    
    // Test 4: Signal lifecycle optimization
    #[test]
    fn test_signal_lifecycle_optimization() {
        let manager = TailwindSignalManager::new();
        
        // This should fail initially - we need to implement lifecycle optimization
        let optimization_applied = manager.apply_lifecycle_optimization();
        assert!(optimization_applied);
    }
    
    // Test 5: Batch size auto-tuning
    #[test]
    fn test_batch_size_auto_tuning() {
        let mut updater = BatchedSignalUpdater::new();
        
        // Simulate different load patterns
        for i in 0..100 {
            updater.queue_update(|| {}).unwrap();
        }
        
        // This should fail initially - we need to implement auto-tuning
        let optimal_batch_size = updater.auto_tune_batch_size();
        assert!(optimal_batch_size > 0);
    }
    
    // Test 6: Memory leak prevention
    #[test]
    fn test_memory_leak_prevention() {
        let mut detector = MemoryLeakDetector::new();
        
        // This should fail initially - we need to implement leak prevention
        let prevention_active = detector.enable_leak_prevention();
        assert!(prevention_active);
    }
    
    // Test 7: Performance metrics collection
    #[test]
    fn test_performance_metrics_collection() {
        let manager = SignalMemoryManager::new();
        
        // This should fail initially - we need to implement metrics collection
        let metrics = manager.collect_performance_metrics();
        assert!(!metrics.is_empty());
    }
    
    // Test 8: Signal deduplication
    #[test]
    fn test_signal_deduplication() {
        let manager = SignalMemoryManager::new();
        
        // Create duplicate signals
        let signal1 = ArcRwSignal::new(42);
        let signal2 = ArcRwSignal::new(42);
        
        // This should fail initially - we need to implement deduplication
        let deduplicated = manager.deduplicate_signals(vec![signal1, signal2]);
        assert_eq!(deduplicated.len(), 1);
    }
    
    // Test 9: Memory fragmentation analysis
    #[test]
    fn test_memory_fragmentation_analysis() {
        let manager = SignalMemoryManager::new();
        
        // This should fail initially - we need to implement fragmentation analysis
        let fragmentation = manager.analyze_memory_fragmentation();
        assert!(fragmentation >= 0.0 && fragmentation <= 1.0);
    }
    
    // Test 10: Adaptive memory management
    #[test]
    fn test_adaptive_memory_management() {
        let mut manager = SignalMemoryManager::new();
        
        // This should fail initially - we need to implement adaptive management
        let adaptive_enabled = manager.enable_adaptive_management();
        assert!(adaptive_enabled);
    }
}
