optirs_learned/

adaptive.rs

// Adaptive Transformer Enhancement for Advanced Mode
//
// This module provides advanced enhancements to the transformer optimizer
// including adaptive sequence processing, memory-efficient attention mechanisms,
// and dynamic architecture adaptation for complex optimization landscapes.

#[allow(dead_code)]
use scirs2_core::ndarray::{Array1, Array2, Array3};
use scirs2_core::numeric::Float;
use std::collections::{HashMap, VecDeque};
use std::fmt::Debug;
use std::time::Instant;

use super::transformer_based_optimizer::{TransformerOptimizer, TransformerOptimizerConfig};
#[allow(unused_imports)]
use crate::error::Result;

/// Adaptive Transformer Enhancement System
pub struct AdaptiveTransformerEnhancement<T: Float + Debug + Send + Sync + 'static> {
    /// Adaptive sequence processor
    sequence_processor: AdaptiveSequenceProcessor<T>,

    /// Memory-efficient attention manager
    attention_manager: MemoryEfficientAttentionManager<T>,

    /// Dynamic architecture adapter
    architecture_adapter: DynamicArchitectureAdapter<T>,

    /// Optimization landscape analyzer
    landscape_analyzer: OptimizationLandscapeAnalyzer<T>,

    /// Performance predictor
    performance_predictor: TransformerPerformancePredictor<T>,

    /// Adaptive configuration
    adaptive_config: AdaptiveConfig<T>,
}

/// Configuration for adaptive enhancements
#[derive(Debug, Clone)]
pub struct AdaptiveConfig<T: Float + Debug + Send + Sync + 'static> {
    /// Enable adaptive sequence length
    pub adaptive_sequence_length: bool,

    /// Maximum sequence length
    pub max_sequence_length: usize,

    /// Minimum sequence length
    pub min_sequence_length: usize,

    /// Attention sparsity threshold
    pub attention_sparsity_threshold: T,

    /// Memory budget (MB)
    pub memory_budget: usize,

    /// Enable dynamic head pruning
    pub dynamic_head_pruning: bool,

    /// Enable layer adaptation
    pub layer_adaptation: bool,

    /// Landscape analysis frequency
    pub landscape_analysis_frequency: usize,

    /// Performance prediction horizon
    pub prediction_horizon: usize,

    /// Adaptation learning rate
    pub adaptation_lr: T,
}

/// Adaptive sequence processor for variable-length optimization histories
#[derive(Debug)]
pub struct AdaptiveSequenceProcessor<T: Float + Debug + Send + Sync + 'static> {
    /// Current sequence length
    current_length: usize,

    /// Sequence importance scores
    importance_scores: VecDeque<T>,

    /// Sequence compression ratio
    compression_ratio: T,

    /// Information-preserving compressor
    compressor: SequenceCompressor<T>,

    /// Adaptive windowing strategy
    windowing_strategy: WindowingStrategy,
}

/// Memory-efficient attention manager
#[derive(Debug)]
pub struct MemoryEfficientAttentionManager<T: Float + Debug + Send + Sync + 'static> {
    /// Attention pattern cache
    pattern_cache: AttentionPatternCache<T>,

    /// Sparse attention mask
    sparse_mask: Array2<bool>,

    /// Local attention windows
    local_windows: Vec<AttentionWindow>,

    /// Global attention heads
    global_heads: Vec<usize>,

    /// Memory usage tracker
    memory_tracker: MemoryUsageTracker,
}

/// Dynamic architecture adapter
#[derive(Debug)]
pub struct DynamicArchitectureAdapter<T: Float + Debug + Send + Sync + 'static> {
    /// Current architecture configuration
    current_config: TransformerOptimizerConfig<T>,

    /// Architecture performance history
    performance_history: VecDeque<ArchitecturePerformance<T>>,

    /// Adaptation strategy
    adaptation_strategy: AdaptationStrategy,

    /// Resource constraints
    resource_constraints: ResourceConstraints,

    /// Architecture search space
    search_space: ArchitectureSearchSpace,
}

/// Optimization landscape analyzer
#[derive(Debug)]
pub struct OptimizationLandscapeAnalyzer<T: Float + Debug + Send + Sync + 'static> {
    /// Landscape features
    landscape_features: LandscapeFeatures<T>,

    /// Complexity estimator
    complexity_estimator: ComplexityEstimator<T>,

    /// Local geometry analyzer
    local_geometry: LocalGeometryAnalyzer<T>,

    /// Global structure detector
    global_structure: GlobalStructureDetector<T>,

    /// Analysis cache
    analysis_cache: HashMap<String, AnalysisResult<T>>,
}

/// Performance predictor for transformer variants
#[derive(Debug)]
pub struct TransformerPerformancePredictor<T: Float + Debug + Send + Sync + 'static> {
    /// Neural predictor network
    predictor_network: PredictorNetwork<T>,

    /// Feature extractor
    feature_extractor: PerformanceFeatureExtractor<T>,

    /// Prediction cache
    prediction_cache: PredictionCache<T>,

    /// Uncertainty estimator
    uncertainty_estimator: UncertaintyEstimator<T>,
}

/// Sequence compressor for information-preserving compression
#[derive(Debug)]
pub struct SequenceCompressor<T: Float + Debug + Send + Sync + 'static> {
    /// Compression algorithm
    algorithm: CompressionAlgorithm,

    /// Compression parameters
    params: CompressionParams<T>,

    /// Quality metrics
    quality_metrics: CompressionQualityMetrics<T>,
}

/// Windowing strategies for adaptive sequences
#[derive(Debug, Clone, Copy)]
pub enum WindowingStrategy {
    /// Fixed size window
    Fixed,

    /// Sliding window
    Sliding,

    /// Importance-based window
    ImportanceBased,

    /// Hierarchical windowing
    Hierarchical,

    /// Attention-guided windowing
    AttentionGuided,
}

/// Attention pattern cache for efficiency
#[derive(Debug)]
pub struct AttentionPatternCache<T: Float + Debug + Send + Sync + 'static> {
    /// Cached patterns
    patterns: HashMap<String, Array3<T>>,

    /// Pattern usage frequency
    usage_frequency: HashMap<String, usize>,

    /// Cache capacity
    capacity: usize,

    /// Eviction policy
    eviction_policy: CacheEvictionPolicy,
}

/// Attention window for local attention
#[derive(Debug, Clone)]
pub struct AttentionWindow {
    /// Window start position
    start: usize,

    /// Window size
    size: usize,

    /// Window importance
    importance: f64,

    /// Window type
    window_type: WindowType,
}

/// Window types for attention
#[derive(Debug, Clone, Copy)]
pub enum WindowType {
    /// Local neighborhood
    Local,

    /// Strided window
    Strided,

    /// Dilated window
    Dilated,

    /// Hierarchical window
    Hierarchical,
}

/// Memory usage tracker
#[derive(Debug)]
pub struct MemoryUsageTracker {
    /// Current memory usage (MB)
    current_usage: usize,

    /// Peak memory usage
    peak_usage: usize,

    /// Memory budget
    budget: usize,

    /// Usage history
    usage_history: VecDeque<usize>,
}

/// Architecture performance metrics
#[derive(Debug, Clone)]
pub struct ArchitecturePerformance<T: Float + Debug + Send + Sync + 'static> {
    /// Convergence speed
    convergence_speed: T,

    /// Final performance
    final_performance: T,

    /// Memory efficiency
    memory_efficiency: T,

    /// Computational cost
    computational_cost: T,

    /// Adaptation time
    adaptation_time: T,
}

/// Adaptation strategies
#[derive(Debug, Clone, Copy)]
pub enum AdaptationStrategy {
    /// Gradual adaptation
    Gradual,

    /// Rapid adaptation
    Rapid,

    /// Conservative adaptation
    Conservative,

    /// Aggressive adaptation
    Aggressive,

    /// Learned adaptation
    Learned,
}

/// Resource constraints for adaptation
#[derive(Debug, Clone)]
pub struct ResourceConstraints {
    /// Maximum memory usage (MB)
    max_memory: usize,

    /// Maximum computation time (ms)
    max_computation_time: u64,

    /// Maximum model parameters
    max_parameters: usize,

    /// Energy budget (if applicable)
    energy_budget: Option<f64>,
}

/// Architecture search space
#[derive(Debug, Clone)]
pub struct ArchitectureSearchSpace {
    /// Layer count range
    layer_count_range: (usize, usize),

    /// Hidden size options
    hidden_size_options: Vec<usize>,

    /// Attention head options
    attention_head_options: Vec<usize>,

    /// Feed-forward dimension options
    ff_dim_options: Vec<usize>,

    /// Activation function options
    activation_options: Vec<ActivationType>,
}

/// Activation function types
#[derive(Debug, Clone, Copy)]
pub enum ActivationType {
    ReLU,
    GELU,
    Swish,
    Mish,
    ELU,
    Tanh,
}

/// Landscape features for optimization analysis
#[derive(Debug, Clone)]
pub struct LandscapeFeatures<T: Float + Debug + Send + Sync + 'static> {
    /// Smoothness measure
    smoothness: T,

    /// Multimodality indicator
    multimodality: T,

    /// Noise level
    noise_level: T,

    /// Curvature information
    curvature: CurvatureInfo<T>,

    /// Gradient characteristics
    gradient_characteristics: GradientCharacteristics<T>,
}

/// Curvature information
#[derive(Debug, Clone)]
pub struct CurvatureInfo<T: Float + Debug + Send + Sync + 'static> {
    /// Mean curvature
    mean_curvature: T,

    /// Gaussian curvature
    gaussian_curvature: T,

    /// Principal curvatures
    principal_curvatures: Vec<T>,

    /// Condition number
    condition_number: T,
}

/// Gradient characteristics
#[derive(Debug, Clone)]
pub struct GradientCharacteristics<T: Float + Debug + Send + Sync + 'static> {
    /// Gradient norm
    gradient_norm: T,

    /// Gradient consistency
    consistency: T,

    /// Gradient noise ratio
    noise_ratio: T,

    /// Gradient correlation
    correlation: T,
}

/// Complexity estimator
#[derive(Debug)]
pub struct ComplexityEstimator<T: Float + Debug + Send + Sync + 'static> {
    /// Computational complexity
    computational_complexity: T,

    /// Sample complexity
    sample_complexity: T,

    /// Model complexity
    model_complexity: T,

    /// Generalization complexity
    generalization_complexity: T,
}

/// Local geometry analyzer
#[derive(Debug)]
pub struct LocalGeometryAnalyzer<T: Float + Debug + Send + Sync + 'static> {
    /// Local minima detector
    local_minima_detector: LocalMinimaDetector<T>,

    /// Saddle point detector
    saddle_point_detector: SaddlePointDetector<T>,

    /// Basin analyzer
    basin_analyzer: BasinAnalyzer<T>,
}

/// Global structure detector
#[derive(Debug)]
pub struct GlobalStructureDetector<T: Float + Debug + Send + Sync + 'static> {
    /// Connectivity analyzer
    connectivity_analyzer: ConnectivityAnalyzer<T>,

    /// Symmetry detector
    symmetry_detector: SymmetryDetector<T>,

    /// Pattern recognizer
    pattern_recognizer: PatternRecognizer<T>,
}

/// Analysis result container
#[derive(Debug, Clone)]
pub struct AnalysisResult<T: Float + Debug + Send + Sync + 'static> {
    /// Analysis timestamp
    timestamp: Instant,

    /// Analysis features
    features: HashMap<String, T>,

    /// Confidence score
    confidence: T,

    /// Analysis metadata
    metadata: HashMap<String, String>,

    /// Complexity score
    complexity_score: T,

    /// Difficulty score
    difficulty_score: T,

    /// Recommended adaptations
    recommended_adaptations: Vec<OptimizationStrategy>,
}

/// Performance prediction network
#[derive(Debug)]
pub struct PredictorNetwork<T: Float + Debug + Send + Sync + 'static> {
    /// Network weights
    weights: Vec<Array2<T>>,

    /// Network biases
    biases: Vec<Array1<T>>,

    /// Activation functions
    activations: Vec<ActivationType>,

    /// Network architecture
    architecture: Vec<usize>,
}

/// Performance feature extractor
#[derive(Debug)]
pub struct PerformanceFeatureExtractor<T: Float + Debug + Send + Sync + 'static> {
    /// Feature dimensions
    feature_dims: usize,

    /// Feature computation cache
    feature_cache: HashMap<String, Array1<T>>,

    /// Feature importance weights
    importance_weights: Array1<T>,
}

/// Prediction cache
#[derive(Debug)]
pub struct PredictionCache<T: Float + Debug + Send + Sync + 'static> {
    /// Cached predictions
    predictions: HashMap<String, PredictionResult<T>>,

    /// Cache hit rate
    hit_rate: f64,

    /// Cache capacity
    capacity: usize,
}

/// Prediction result
#[derive(Debug, Clone)]
pub struct PredictionResult<T: Float + Debug + Send + Sync + 'static> {
    /// Predicted performance
    predicted_performance: T,

    /// Confidence interval
    confidence_interval: (T, T),

    /// Prediction timestamp
    timestamp: Instant,

    /// Prediction features
    features: Array1<T>,
}

/// Uncertainty estimator
#[derive(Debug)]
pub struct UncertaintyEstimator<T: Float + Debug + Send + Sync + 'static> {
    /// Epistemic uncertainty
    epistemic_uncertainty: T,

    /// Aleatoric uncertainty
    aleatoric_uncertainty: T,

    /// Total uncertainty
    total_uncertainty: T,

    /// Uncertainty estimation method
    estimation_method: UncertaintyMethod,
}

/// Uncertainty estimation methods
#[derive(Debug, Clone, Copy)]
pub enum UncertaintyMethod {
    /// Monte Carlo dropout
    MonteCarloDropout,

    /// Bayesian neural networks
    BayesianNN,

    /// Ensemble methods
    Ensemble,

    /// Variational inference
    VariationalInference,
}

/// Compression algorithms
#[derive(Debug, Clone, Copy)]
pub enum CompressionAlgorithm {
    /// Principal Component Analysis
    PCA,

    /// Autoencoder compression
    Autoencoder,

    /// Singular Value Decomposition
    SVD,

    /// Random projection
    RandomProjection,

    /// Learned compression
    Learned,
}

/// Compression parameters
#[derive(Debug, Clone)]
pub struct CompressionParams<T: Float + Debug + Send + Sync + 'static> {
    /// Target compression ratio
    target_ratio: T,

    /// Quality threshold
    quality_threshold: T,

    /// Maximum compression time
    max_time: u64,

    /// Compression strength
    strength: T,
}

/// Compression quality metrics
#[derive(Debug, Clone)]
pub struct CompressionQualityMetrics<T: Float + Debug + Send + Sync + 'static> {
    /// Reconstruction error
    reconstruction_error: T,

    /// Information loss
    information_loss: T,

    /// Compression ratio achieved
    compression_ratio: T,

    /// Compression time
    compression_time: u64,
}

/// Cache eviction policies
#[derive(Debug, Clone, Copy)]
pub enum CacheEvictionPolicy {
    /// Least Recently Used
    LRU,

    /// Least Frequently Used
    LFU,

    /// First In First Out
    FIFO,

    /// Random eviction
    Random,

    /// Importance-based eviction
    ImportanceBased,
}

/// Local minima detector
#[derive(Debug)]
pub struct LocalMinimaDetector<T: Float + Debug + Send + Sync + 'static> {
    /// Detection threshold
    threshold: T,

    /// Detected minima
    detected_minima: Vec<LocalMinimum<T>>,

    /// Detection algorithm
    algorithm: MinimaDetectionAlgorithm,
}

/// Saddle point detector
#[derive(Debug)]
pub struct SaddlePointDetector<T: Float + Debug + Send + Sync + 'static> {
    /// Detection threshold
    threshold: T,

    /// Detected saddle points
    detected_saddles: Vec<SaddlePoint<T>>,

    /// Detection algorithm
    algorithm: SaddleDetectionAlgorithm,
}

/// Basin analyzer
#[derive(Debug)]
pub struct BasinAnalyzer<T: Float + Debug + Send + Sync + 'static> {
    /// Basin characteristics
    basin_characteristics: Vec<Basin<T>>,

    /// Analysis method
    analysis_method: BasinAnalysisMethod,
}

/// Connectivity analyzer
#[derive(Debug)]
pub struct ConnectivityAnalyzer<T: Float + Debug + Send + Sync + 'static> {
    /// Connectivity graph
    connectivity_graph: Array2<T>,

    /// Path analysis results
    path_analysis: PathAnalysisResults<T>,
}

/// Symmetry detector
#[derive(Debug)]
pub struct SymmetryDetector<T: Float + Debug + Send + Sync + 'static> {
    /// Detected symmetries
    symmetries: Vec<Symmetry<T>>,

    /// Symmetry types
    symmetry_types: Vec<SymmetryType>,
}

/// Pattern recognizer
#[derive(Debug)]
pub struct PatternRecognizer<T: Float + Debug + Send + Sync + 'static> {
    /// Recognized patterns
    patterns: Vec<OptimizationPattern<T>>,

    /// Pattern library
    pattern_library: PatternLibrary<T>,
}

/// Local minimum representation
#[derive(Debug, Clone)]
pub struct LocalMinimum<T: Float + Debug + Send + Sync + 'static> {
    /// Position
    position: Array1<T>,

    /// Value
    value: T,

    /// Basin size
    basin_size: T,

    /// Escape difficulty
    escape_difficulty: T,
}

/// Saddle point representation
#[derive(Debug, Clone)]
pub struct SaddlePoint<T: Float + Debug + Send + Sync + 'static> {
    /// Position
    position: Array1<T>,

    /// Value
    value: T,

    /// Escape directions
    escape_directions: Vec<Array1<T>>,

    /// Instability measure
    instability: T,
}

/// Basin representation
#[derive(Debug, Clone)]
pub struct Basin<T: Float + Debug + Send + Sync + 'static> {
    /// Basin boundary
    boundary: Vec<Array1<T>>,

    /// Volume
    volume: T,

    /// Depth
    depth: T,

    /// Shape characteristics
    shape: BasinShape,
}

/// Basin shapes
#[derive(Debug, Clone, Copy)]
pub enum BasinShape {
    Spherical,
    Ellipsoidal,
    Irregular,
    Narrow,
    Wide,
}

/// Path analysis results
#[derive(Debug, Clone)]
pub struct PathAnalysisResults<T: Float + Debug + Send + Sync + 'static> {
    /// Shortest paths
    shortest_paths: Vec<OptimizationPath<T>>,

    /// Path difficulties
    path_difficulties: Vec<T>,

    /// Connectivity measure
    connectivity_measure: T,
}

/// Optimization path
#[derive(Debug, Clone)]
pub struct OptimizationPath<T: Float + Debug + Send + Sync + 'static> {
    /// Path points
    points: Vec<Array1<T>>,

    /// Path values
    values: Vec<T>,

    /// Path length
    length: T,

    /// Path difficulty
    difficulty: T,
}

/// Symmetry representation
#[derive(Debug, Clone)]
pub struct Symmetry<T: Float + Debug + Send + Sync + 'static> {
    /// Symmetry type
    symmetry_type: SymmetryType,

    /// Symmetry parameters
    parameters: Array1<T>,

    /// Symmetry strength
    strength: T,
}

/// Symmetry types
#[derive(Debug, Clone, Copy)]
pub enum SymmetryType {
    Rotational,
    Reflectional,
    Translational,
    Scale,
    Discrete,
}

/// Optimization pattern
#[derive(Debug, Clone)]
pub struct OptimizationPattern<T: Float + Debug + Send + Sync + 'static> {
    /// Pattern type
    pattern_type: PatternType,

    /// Pattern parameters
    parameters: HashMap<String, T>,

    /// Pattern confidence
    confidence: T,

    /// Pattern applicability
    applicability: PatternApplicability,
}

/// Pattern types
#[derive(Debug, Clone, Copy)]
pub enum PatternType {
    ConvexRegion,
    RavineLike,
    PlateauLike,
    Oscillatory,
    Monotonic,
    Chaotic,
}

/// Pattern applicability
#[derive(Debug, Clone)]
pub struct PatternApplicability {
    /// Applicable regions
    regions: Vec<Array1<f64>>,

    /// Applicability score
    score: f64,

    /// Confidence level
    confidence: f64,
}

/// Pattern library
#[derive(Debug)]
pub struct PatternLibrary<T: Float + Debug + Send + Sync + 'static> {
    /// Pattern database
    patterns: HashMap<String, OptimizationPattern<T>>,

    /// Pattern index
    pattern_index: HashMap<PatternType, Vec<String>>,

    /// Usage statistics
    usage_stats: HashMap<String, usize>,
}

/// Detection algorithms
#[derive(Debug, Clone, Copy)]
pub enum MinimaDetectionAlgorithm {
    GradientBased,
    HessianBased,
    TopologyBased,
    SamplingBased,
}

#[derive(Debug, Clone, Copy)]
pub enum SaddleDetectionAlgorithm {
    EigenvalueBased,
    NewtonBased,
    PerturbationBased,
    FlowBased,
}

#[derive(Debug, Clone, Copy)]
pub enum BasinAnalysisMethod {
    FloodFill,
    GradientFlow,
    MonteCarloSampling,
    TopologicalAnalysis,
}

impl<T: Float + Debug + Send + Sync + 'static> Default for AdaptiveConfig<T> {
    fn default() -> Self {
        Self {
            adaptive_sequence_length: true,
            max_sequence_length: 1024,
            min_sequence_length: 64,
            attention_sparsity_threshold: scirs2_core::numeric::NumCast::from(0.1)
                .unwrap_or_else(|| T::zero()),
            memory_budget: 8192, // 8GB
            dynamic_head_pruning: true,
            layer_adaptation: true,
            landscape_analysis_frequency: 100,
            prediction_horizon: 50,
            adaptation_lr: scirs2_core::numeric::NumCast::from(0.001).unwrap_or_else(|| T::zero()),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static + std::iter::Sum> AdaptiveTransformerEnhancement<T> {
    /// Enhance transformer optimizer for current optimization task
    pub fn enhance_optimizer(
        &mut self,
        transformer: &mut TransformerOptimizer<T>,
        gradient_history: &[Array1<T>],
        losshistory: &[T],
    ) -> Result<EnhancementResult<T>> {
        // Analyze optimization landscape
        let landscape_analysis = self
            .landscape_analyzer
            .analyze(gradient_history, losshistory)?;

        // Adapt sequence processing
        let sequence_adaptation = self
            .sequence_processor
            .adapt_to_landscape(&landscape_analysis)?;

        // Optimize attention patterns
        let attention_optimization = self
            .attention_manager
            .optimize_attention(&landscape_analysis)?;

        // Adapt architecture if needed
        let architecture_adaptation = self.architecture_adapter.adapt_architecture(
            &landscape_analysis,
            &sequence_adaptation,
            &attention_optimization,
        )?;

        // Predict performance improvement
        let performance_prediction = self
            .performance_predictor
            .predict_improvement(&landscape_analysis, &architecture_adaptation)?;

        // Calculate convergence metrics
        let convergence_metrics = self.calculate_convergence_metrics(losshistory);

        Ok(EnhancementResult {
            sequence_adaptation,
            attention_optimization,
            architecture_adaptation,
            performance_prediction,
            landscape_analysis,
            convergence_metrics,
        })
    }
}

/// Enhancement result
#[derive(Debug)]
pub struct EnhancementResult<T: Float + Debug + Send + Sync + 'static> {
    /// Sequence processing adaptations
    pub sequence_adaptation: SequenceAdaptation<T>,

    /// Attention optimizations
    pub attention_optimization: AttentionOptimization<T>,

    /// Architecture adaptations
    pub architecture_adaptation: ArchitectureAdaptation<T>,

    /// Performance predictions
    pub performance_prediction: PerformancePrediction<T>,

    /// Landscape analysis
    pub landscape_analysis: LandscapeAnalysis<T>,

    /// Convergence metrics
    pub convergence_metrics: ConvergenceMetrics<T>,
}

/// Sequence adaptation result
#[derive(Debug)]
pub struct SequenceAdaptation<T: Float + Debug + Send + Sync + 'static> {
    /// New sequence length
    pub new_length: usize,

    /// Compression ratio
    pub compression_ratio: T,

    /// Information preservation score
    pub information_preservation: T,

    /// Processing efficiency gain
    pub efficiency_gain: T,
}

/// Attention optimization result
#[derive(Debug, Clone)]
pub struct AttentionOptimization<T: Float + Debug + Send + Sync + 'static> {
    /// Optimized attention patterns
    pub attention_patterns: Array3<T>,

    /// Sparsity level achieved
    pub sparsitylevel: T,

    /// Memory savings
    pub memory_savings: usize,

    /// Computational speedup
    pub computational_speedup: T,
}

/// Architecture adaptation result
#[derive(Debug)]
pub struct ArchitectureAdaptation<T: Float + Debug + Send + Sync + 'static> {
    /// Adapted configuration
    pub adapted_config: TransformerOptimizerConfig<T>,

    /// Architecture changes
    pub changes: Vec<ArchitectureChange>,

    /// Expected improvement
    pub expected_improvement: T,

    /// Adaptation confidence
    pub confidence: T,
}

/// Architecture change types
#[derive(Debug, Clone)]
pub enum ArchitectureChange {
    LayerCountChange(usize),
    HiddenSizeChange(usize),
    AttentionHeadChange(usize),
    ActivationChange(ActivationType),
    DropoutChange(f64),
}

/// Performance prediction result
#[derive(Debug)]
pub struct PerformancePrediction<T: Float + Debug + Send + Sync + 'static> {
    /// Predicted convergence improvement
    pub convergence_improvement: T,

    /// Predicted final performance
    pub final_performance: T,

    /// Prediction confidence
    pub confidence: T,

    /// Uncertainty estimate
    pub uncertainty: T,
}

/// Landscape analysis result
#[derive(Debug)]
pub struct LandscapeAnalysis<T: Float + Debug + Send + Sync + 'static> {
    /// Landscape complexity
    pub complexity: T,

    /// Optimization difficulty
    pub difficulty: T,

    /// Recommended strategies
    pub recommended_strategies: Vec<OptimizationStrategy>,

    /// Analysis confidence
    pub confidence: T,
}

/// Optimization strategies
#[derive(Debug, Clone, Copy)]
pub enum OptimizationStrategy {
    Conservative,
    Aggressive,
    Adaptive,
    Exploratory,
    Exploitative,
}

/// Convergence metrics for tracking optimization progress
#[derive(Debug, Clone)]
pub struct ConvergenceMetrics<T: Float + Debug + Send + Sync + 'static> {
    /// Rate of convergence
    pub convergence_rate: T,

    /// Stability measure
    pub stability_measure: T,

    /// Plateau detection flag
    pub plateau_detection: bool,

    /// Oscillation measure
    pub oscillation_measure: T,
}

/// Enhancement statistics for tracking performance
#[derive(Debug, Clone)]
pub struct EnhancementStatistics<T: Float + Debug + Send + Sync + 'static> {
    /// Total number of enhancements performed
    pub total_enhancements: usize,

    /// Average complexity of analyzed landscapes
    pub average_complexity: T,

    /// Average performance achieved
    pub average_performance: T,

    /// Memory efficiency measure
    pub memory_efficiency: T,

    /// Success rate of adaptations
    pub adaptation_success_rate: T,
}

// Main implementation for AdaptiveTransformerEnhancement
impl<T: Float + Debug + Send + Sync + 'static + std::iter::Sum> AdaptiveTransformerEnhancement<T> {
    pub fn new(config: AdaptiveConfig<T>) -> Result<Self> {
        Ok(Self {
            sequence_processor: AdaptiveSequenceProcessor::new(&config)?,
            attention_manager: MemoryEfficientAttentionManager::new(&config)?,
            architecture_adapter: DynamicArchitectureAdapter::new(&config)?,
            landscape_analyzer: OptimizationLandscapeAnalyzer::new(&config)?,
            performance_predictor: TransformerPerformancePredictor::new(&config)?,
            adaptive_config: config,
        })
    }

    /// Enhanced optimization step with adaptive features
    pub fn enhanced_optimize_step(
        &mut self,
        parameters: &mut Array1<T>,
        gradients: &Array1<T>,
        losshistory: &[T],
        gradient_history: &[Array1<T>],
    ) -> Result<EnhancementResult<T>> {
        // Analyze the optimization landscape
        let landscape = self
            .landscape_analyzer
            .analyze(gradient_history, losshistory)?;

        // Adapt sequence processing based on landscape
        let sequence_adaptation = self.sequence_processor.adapt_to_landscape(&landscape)?;

        // Optimize attention patterns
        let attention_optimization = self.attention_manager.optimize_attention(&landscape)?;

        // Adapt architecture if needed
        let architecture_adaptation = self.architecture_adapter.adapt_architecture(
            &landscape,
            &sequence_adaptation,
            &attention_optimization,
        )?;

        // Predict performance improvement
        let performance_prediction = self
            .performance_predictor
            .predict_improvement(&landscape, &architecture_adaptation)?;

        // Apply adaptive modifications to parameters
        self.apply_adaptive_updates(
            parameters,
            gradients,
            &sequence_adaptation,
            &attention_optimization,
            &architecture_adaptation,
        )?;

        Ok(EnhancementResult {
            landscape_analysis: landscape,
            sequence_adaptation,
            attention_optimization,
            architecture_adaptation,
            performance_prediction,
            convergence_metrics: self.calculate_convergence_metrics(losshistory),
        })
    }

    /// Apply adaptive updates to parameters
    fn apply_adaptive_updates(
        &mut self,
        parameters: &mut Array1<T>,
        gradients: &Array1<T>,
        sequence_adaptation: &SequenceAdaptation<T>,
        attention_optimization: &AttentionOptimization<T>,
        architecture_adaptation: &ArchitectureAdaptation<T>,
    ) -> Result<()> {
        // Apply sequence-adaptive learning rate scaling
        let sequence_scale = sequence_adaptation.efficiency_gain;

        // Apply attention-aware parameter updates
        let attention_scale = attention_optimization.computational_speedup;

        // Apply architecture-aware adaptive updates
        let architecture_scale = architecture_adaptation.expected_improvement;

        // Combined adaptive scaling
        let combined_scale = sequence_scale * attention_scale * architecture_scale
            / scirs2_core::numeric::NumCast::from(3.0).unwrap_or_else(|| T::zero());

        // Apply scaled gradient updates
        for (i, (param, grad)) in parameters.iter_mut().zip(gradients.iter()).enumerate() {
            let adaptive_lr = self.calculate_adaptive_learning_rate(i, combined_scale)?;
            *param = *param - adaptive_lr * *grad;
        }

        Ok(())
    }

    /// Calculate adaptive learning rate for each parameter
    fn calculate_adaptive_learning_rate(&self, param_index: usize, basescale: T) -> Result<T> {
        let base_lr = scirs2_core::numeric::NumCast::from(0.001).unwrap_or_else(|| T::zero()); // Base learning rate

        // Parameter-specific adaptation
        let param_adaptation = if param_index.is_multiple_of(2) {
            scirs2_core::numeric::NumCast::from(1.1).unwrap_or_else(|| T::zero())
        // Slightly higher for even indices
        } else {
            scirs2_core::numeric::NumCast::from(0.9).unwrap_or_else(|| T::zero())
            // Slightly lower for odd indices
        };

        Ok(base_lr * basescale * param_adaptation)
    }

    /// Calculate convergence metrics
    fn calculate_convergence_metrics(&self, losshistory: &[T]) -> ConvergenceMetrics<T> {
        if losshistory.len() < 2 {
            return ConvergenceMetrics {
                convergence_rate: T::zero(),
                stability_measure: T::zero(),
                plateau_detection: false,
                oscillation_measure: T::zero(),
            };
        }

        // Calculate convergence rate
        let recent_losses = &losshistory[losshistory.len().saturating_sub(10)..];
        let convergence_rate = if recent_losses.len() >= 2 {
            let initial = recent_losses[0];
            let final_loss = recent_losses[recent_losses.len() - 1];
            if initial > T::zero() {
                (initial - final_loss) / initial
            } else {
                T::zero()
            }
        } else {
            T::zero()
        };

        // Calculate stability (inverse of variance)
        let mean_loss =
            recent_losses.iter().cloned().sum::<T>() / T::from(recent_losses.len()).unwrap();
        let variance = recent_losses
            .iter()
            .map(|&loss| {
                let diff = loss - mean_loss;
                diff * diff
            })
            .sum::<T>()
            / T::from(recent_losses.len()).unwrap();

        let stability_measure = T::one() / (T::one() + variance);

        // Plateau detection
        let plateau_threshold =
            scirs2_core::numeric::NumCast::from(0.001).unwrap_or_else(|| T::zero());
        let plateau_detection = convergence_rate.abs() < plateau_threshold;

        // Oscillation measure (based on consecutive differences)
        let mut oscillation_sum = T::zero();
        for i in 1..recent_losses.len() {
            oscillation_sum = oscillation_sum + (recent_losses[i] - recent_losses[i - 1]).abs();
        }
        let oscillation_measure = if recent_losses.len() > 1 {
            oscillation_sum / T::from(recent_losses.len() - 1).unwrap()
        } else {
            T::zero()
        };

        ConvergenceMetrics {
            convergence_rate,
            stability_measure,
            plateau_detection,
            oscillation_measure,
        }
    }

    /// Update internal state based on optimization progress
    pub fn update_enhancement_state(
        &mut self,
        enhancement_result: &EnhancementResult<T>,
    ) -> Result<()> {
        // Update landscape analyzer cache
        let cache_key = format!(
            "analysis_{}",
            enhancement_result
                .landscape_analysis
                .complexity
                .to_f64()
                .unwrap_or(0.0)
        );
        self.landscape_analyzer.analysis_cache.insert(
            cache_key,
            AnalysisResult {
                timestamp: Instant::now(),
                features: {
                    let mut features = HashMap::new();
                    features.insert(
                        "complexity".to_string(),
                        enhancement_result.landscape_analysis.complexity,
                    );
                    features.insert(
                        "difficulty".to_string(),
                        enhancement_result.landscape_analysis.difficulty,
                    );
                    features
                },
                complexity_score: enhancement_result.landscape_analysis.complexity,
                difficulty_score: enhancement_result.landscape_analysis.difficulty,
                recommended_adaptations: enhancement_result
                    .landscape_analysis
                    .recommended_strategies
                    .clone(),
                confidence: enhancement_result.landscape_analysis.confidence,
                metadata: HashMap::new(),
            },
        );

        // Update architecture adapter history
        let performance = ArchitecturePerformance {
            convergence_speed: enhancement_result.convergence_metrics.convergence_rate,
            final_performance: T::one() - enhancement_result.performance_prediction.uncertainty,
            memory_efficiency: T::from(enhancement_result.attention_optimization.memory_savings)
                .unwrap(),
            computational_cost: T::one()
                / enhancement_result
                    .attention_optimization
                    .computational_speedup,
            adaptation_time: scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()), // Placeholder
        };

        self.architecture_adapter
            .performance_history
            .push_back(performance);

        // Maintain history size limit
        if self.architecture_adapter.performance_history.len() > 100 {
            self.architecture_adapter.performance_history.pop_front();
        }

        Ok(())
    }

    /// Get enhancement statistics
    pub fn get_enhancement_statistics(&self) -> EnhancementStatistics<T> {
        let avg_complexity = if !self.landscape_analyzer.analysis_cache.is_empty() {
            let sum: T = self
                .landscape_analyzer
                .analysis_cache
                .values()
                .map(|result| result.complexity_score)
                .sum();
            sum / T::from(self.landscape_analyzer.analysis_cache.len()).unwrap()
        } else {
            scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero())
        };

        let avg_performance = if !self.architecture_adapter.performance_history.is_empty() {
            let sum: T = self
                .architecture_adapter
                .performance_history
                .iter()
                .map(|perf| perf.final_performance)
                .sum();
            sum / T::from(self.architecture_adapter.performance_history.len()).unwrap()
        } else {
            scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero())
        };

        EnhancementStatistics {
            total_enhancements: self.landscape_analyzer.analysis_cache.len(),
            average_complexity: avg_complexity,
            average_performance: avg_performance,
            memory_efficiency: scirs2_core::numeric::NumCast::from(0.8)
                .unwrap_or_else(|| T::zero()), // Placeholder
            adaptation_success_rate: scirs2_core::numeric::NumCast::from(0.85)
                .unwrap_or_else(|| T::zero()), // Placeholder
        }
    }
}

// Implementation stubs for the complex components
impl<T: Float + Debug + Send + Sync + 'static> AdaptiveSequenceProcessor<T> {
    fn new(config: &AdaptiveConfig<T>) -> Result<Self> {
        Ok(Self {
            current_length: 512,
            importance_scores: VecDeque::new(),
            compression_ratio: scirs2_core::numeric::NumCast::from(0.8)
                .unwrap_or_else(|| T::zero()),
            compressor: SequenceCompressor::new()?,
            windowing_strategy: WindowingStrategy::ImportanceBased,
        })
    }

    fn adapt_to_landscape(
        &mut self,
        analysis: &LandscapeAnalysis<T>,
    ) -> Result<SequenceAdaptation<T>> {
        // Enhanced implementation based on landscape complexity
        let complexity_factor = analysis.complexity.to_f64().unwrap_or(0.5);
        let difficulty_factor = analysis.difficulty.to_f64().unwrap_or(0.3);

        // Adapt sequence length based on landscape characteristics
        let new_length = if complexity_factor > 0.7 {
            // High complexity: increase sequence length for better context
            (self.current_length as f64 * 1.2).min(2048.0) as usize
        } else if complexity_factor < 0.3 {
            // Low complexity: decrease sequence length for efficiency
            (self.current_length as f64 * 0.8).max(64.0) as usize
        } else {
            self.current_length
        };

        // Adapt compression ratio based on difficulty
        let new_compression_ratio = if difficulty_factor > 0.6 {
            // High difficulty: reduce compression to preserve information
            self.compression_ratio
                * scirs2_core::numeric::NumCast::from(0.9).unwrap_or_else(|| T::zero())
        } else {
            // Lower difficulty: increase compression for efficiency
            self.compression_ratio
                * scirs2_core::numeric::NumCast::from(1.1).unwrap_or_else(|| T::zero())
        }
        .min(scirs2_core::numeric::NumCast::from(0.95).unwrap_or_else(|| T::zero()))
        .max(scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero()));

        // Update internal state
        self.current_length = new_length;
        self.compression_ratio = new_compression_ratio;

        // Calculate information preservation based on compression ratio
        let information_preservation = T::one()
            - (T::one() - new_compression_ratio)
                * scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero());

        // Calculate efficiency gain
        let length_efficiency =
            scirs2_core::numeric::NumCast::from(self.current_length as f64 / new_length as f64)
                .unwrap_or_else(|| T::zero());
        let compression_efficiency = T::one() / new_compression_ratio;
        let efficiency_gain = (length_efficiency + compression_efficiency)
            / scirs2_core::numeric::NumCast::from(2.0).unwrap_or_else(|| T::zero());

        // Update importance scores based on landscape
        self.update_importance_scores(analysis)?;

        Ok(SequenceAdaptation {
            new_length,
            compression_ratio: new_compression_ratio,
            information_preservation,
            efficiency_gain,
        })
    }

    fn update_importance_scores(&mut self, analysis: &LandscapeAnalysis<T>) -> Result<()> {
        // Generate importance scores based on landscape analysis
        let base_importance = scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero());
        let complexity_boost = analysis.complexity
            * scirs2_core::numeric::NumCast::from(0.3).unwrap_or_else(|| T::zero());
        let difficulty_boost = analysis.difficulty
            * scirs2_core::numeric::NumCast::from(0.2).unwrap_or_else(|| T::zero());

        let new_importance = base_importance + complexity_boost + difficulty_boost;

        // Add to importance scores history
        self.importance_scores.push_back(new_importance);

        // Maintain scores history size
        if self.importance_scores.len() > 100 {
            self.importance_scores.pop_front();
        }

        Ok(())
    }
}

impl<T: Float + Debug + Send + Sync + 'static> MemoryEfficientAttentionManager<T> {
    fn new(config: &AdaptiveConfig<T>) -> Result<Self> {
        Ok(Self {
            pattern_cache: AttentionPatternCache::new(),
            sparse_mask: Array2::default((0, 0)),
            local_windows: Vec::new(),
            global_heads: Vec::new(),
            memory_tracker: MemoryUsageTracker::new(),
        })
    }

    fn optimize_attention(
        &mut self,
        analysis: &LandscapeAnalysis<T>,
    ) -> Result<AttentionOptimization<T>> {
        // Enhanced attention optimization based on landscape analysis
        let complexity = analysis.complexity.to_f64().unwrap_or(0.5);
        let difficulty = analysis.difficulty.to_f64().unwrap_or(0.3);

        // Determine optimal attention configuration
        let (num_heads, seq_len) = self.determine_attention_dimensions(complexity, difficulty)?;

        // Generate optimized attention patterns
        let mut attention_patterns = Array3::zeros((num_heads, seq_len, seq_len));
        self.generate_attention_patterns(&mut attention_patterns, analysis)?;

        // Calculate sparsity level based on landscape
        let sparsitylevel = if complexity > 0.7 {
            // High complexity: lower sparsity for more attention
            scirs2_core::numeric::NumCast::from(0.05).unwrap_or_else(|| T::zero())
        } else {
            // Lower complexity: higher sparsity for efficiency
            scirs2_core::numeric::NumCast::from(0.15).unwrap_or_else(|| T::zero())
        };

        // Apply sparsity mask
        self.apply_sparsity_mask(&mut attention_patterns, sparsitylevel)?;

        // Update cache with new patterns
        let pattern_key = format!("pattern_{}_{}", num_heads, seq_len);
        self.pattern_cache
            .patterns
            .insert(pattern_key.clone(), attention_patterns.clone());
        *self
            .pattern_cache
            .usage_frequency
            .entry(pattern_key)
            .or_insert(0) += 1;

        // Calculate memory savings
        let original_size = 8 * 512 * 512 * std::mem::size_of::<f32>();
        let optimized_size = num_heads * seq_len * seq_len * std::mem::size_of::<f32>();
        let memory_savings = original_size.saturating_sub(optimized_size);

        // Calculate computational speedup
        let speedup_from_sparsity = T::one() / sparsitylevel;
        let speedup_from_dimensions = T::from(512.0 * 512.0 / (seq_len * seq_len) as f64).unwrap();
        let computational_speedup = (speedup_from_sparsity + speedup_from_dimensions)
            / scirs2_core::numeric::NumCast::from(2.0).unwrap_or_else(|| T::zero());

        // Update memory tracker
        self.memory_tracker.current_usage += optimized_size;
        if self.memory_tracker.current_usage > self.memory_tracker.peak_usage {
            self.memory_tracker.peak_usage = self.memory_tracker.current_usage;
        }

        Ok(AttentionOptimization {
            attention_patterns,
            sparsitylevel,
            memory_savings,
            computational_speedup,
        })
    }

    fn determine_attention_dimensions(
        &self,
        complexity: f64,
        difficulty: f64,
    ) -> Result<(usize, usize)> {
        let base_heads = 8;
        let base_seq_len = 512;

        // Adjust based on complexity and difficulty
        let heads = (if complexity > 0.8 {
            (base_heads as f64 * 1.5) as usize
        } else if complexity < 0.3 {
            (base_heads as f64 * 0.75) as usize
        } else {
            base_heads
        })
        .clamp(4, 16);

        let seq_len = (if difficulty > 0.7 {
            (base_seq_len as f64 * 1.2) as usize
        } else if difficulty < 0.3 {
            (base_seq_len as f64 * 0.8) as usize
        } else {
            base_seq_len
        })
        .clamp(256, 1024);

        Ok((heads, seq_len))
    }

    fn generate_attention_patterns(
        &self,
        patterns: &mut Array3<T>,
        analysis: &LandscapeAnalysis<T>,
    ) -> Result<()> {
        let (num_heads, seq_len, _) = patterns.dim();

        for head in 0..num_heads {
            for i in 0..seq_len {
                for j in 0..seq_len {
                    // Generate attention weight based on position and analysis
                    let distance = ((i as i32 - j as i32).abs() as f64).sqrt();
                    let base_attention = (-scirs2_core::numeric::NumCast::from(distance)
                        .unwrap_or_else(|| T::zero())
                        / (scirs2_core::numeric::NumCast::from(seq_len)
                            .unwrap_or_else(|| T::zero())
                            * scirs2_core::numeric::NumCast::from(0.1)
                                .unwrap_or_else(|| T::zero())))
                    .exp();

                    // Modulate based on landscape analysis
                    let complexity_factor = analysis.complexity.to_f64().unwrap_or(0.5);
                    let modulated_attention = base_attention
                        * (T::one()
                            + scirs2_core::numeric::NumCast::from(complexity_factor)
                                .unwrap_or_else(|| T::zero())
                                * scirs2_core::numeric::NumCast::from(0.3)
                                    .unwrap_or_else(|| T::zero()));

                    patterns[[head, i, j]] =
                        scirs2_core::numeric::NumCast::from(modulated_attention)
                            .unwrap_or_else(|| T::zero());
                }
            }
        }

        Ok(())
    }

    fn apply_sparsity_mask(&self, patterns: &mut Array3<T>, sparsitylevel: T) -> Result<()> {
        let sparsity_threshold = sparsitylevel.to_f64().unwrap_or(0.1);

        patterns.map_inplace(|x| {
            if x.to_f64().unwrap_or(0.0) < sparsity_threshold {
                *x = T::zero();
            }
        });

        Ok(())
    }
}

impl<T: Float + Debug + Send + Sync + 'static> DynamicArchitectureAdapter<T> {
    fn new(config: &AdaptiveConfig<T>) -> Result<Self> {
        Ok(Self {
            current_config: TransformerOptimizerConfig::<T>::default(),
            performance_history: VecDeque::new(),
            adaptation_strategy: AdaptationStrategy::Gradual,
            resource_constraints: ResourceConstraints::default(),
            search_space: ArchitectureSearchSpace::default(),
        })
    }

    fn adapt_architecture(
        &mut self,
        landscape: &LandscapeAnalysis<T>,
        _sequence: &SequenceAdaptation<T>,
        _attention: &AttentionOptimization<T>,
    ) -> Result<ArchitectureAdaptation<T>> {
        // Simplified implementation
        Ok(ArchitectureAdaptation {
            adapted_config: self.current_config.clone(),
            changes: vec![ArchitectureChange::LayerCountChange(6)],
            expected_improvement: scirs2_core::numeric::NumCast::from(0.1)
                .unwrap_or_else(|| T::zero()),
            confidence: scirs2_core::numeric::NumCast::from(0.8).unwrap_or_else(|| T::zero()),
        })
    }
}

impl<T: Float + Debug + Send + Sync + 'static> OptimizationLandscapeAnalyzer<T> {
    fn new(config: &AdaptiveConfig<T>) -> Result<Self> {
        Ok(Self {
            landscape_features: LandscapeFeatures::default(),
            complexity_estimator: ComplexityEstimator::new(),
            local_geometry: LocalGeometryAnalyzer::new(),
            global_structure: GlobalStructureDetector::new(),
            analysis_cache: HashMap::new(),
        })
    }

    fn analyze(
        &mut self,
        _gradient_history: &[Array1<T>],
        _loss_history: &[T],
    ) -> Result<LandscapeAnalysis<T>> {
        // Simplified implementation
        Ok(LandscapeAnalysis {
            complexity: scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero()),
            difficulty: scirs2_core::numeric::NumCast::from(0.3).unwrap_or_else(|| T::zero()),
            recommended_strategies: vec![OptimizationStrategy::Adaptive],
            confidence: scirs2_core::numeric::NumCast::from(0.9).unwrap_or_else(|| T::zero()),
        })
    }
}

impl<T: Float + Debug + Send + Sync + 'static> TransformerPerformancePredictor<T> {
    fn new(config: &AdaptiveConfig<T>) -> Result<Self> {
        Ok(Self {
            predictor_network: PredictorNetwork::new(vec![64, 128, 64, 1])?,
            feature_extractor: PerformanceFeatureExtractor::new(64)?,
            prediction_cache: PredictionCache::new(1000),
            uncertainty_estimator: UncertaintyEstimator::new(UncertaintyMethod::Ensemble),
        })
    }

    fn predict_improvement(
        &mut self,
        landscape: &LandscapeAnalysis<T>,
        _adaptation: &ArchitectureAdaptation<T>,
    ) -> Result<PerformancePrediction<T>> {
        // Simplified implementation
        Ok(PerformancePrediction {
            convergence_improvement: scirs2_core::numeric::NumCast::from(0.15)
                .unwrap_or_else(|| T::zero()),
            final_performance: scirs2_core::numeric::NumCast::from(0.92)
                .unwrap_or_else(|| T::zero()),
            confidence: scirs2_core::numeric::NumCast::from(0.85).unwrap_or_else(|| T::zero()),
            uncertainty: scirs2_core::numeric::NumCast::from(0.05).unwrap_or_else(|| T::zero()),
        })
    }
}

// Additional implementation stubs for completeness
impl<T: Float + Debug + Send + Sync + 'static> SequenceCompressor<T> {
    fn new() -> Result<Self> {
        Ok(Self {
            algorithm: CompressionAlgorithm::PCA,
            params: CompressionParams::default(),
            quality_metrics: CompressionQualityMetrics::default(),
        })
    }
}

impl<T: Float + Debug + Send + Sync + 'static> AttentionPatternCache<T> {
    fn new() -> Self {
        Self {
            patterns: HashMap::new(),
            usage_frequency: HashMap::new(),
            capacity: 1000,
            eviction_policy: CacheEvictionPolicy::LRU,
        }
    }
}

impl MemoryUsageTracker {
    fn new() -> Self {
        Self {
            current_usage: 0,
            peak_usage: 0,
            budget: 8192,
            usage_history: VecDeque::new(),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> ComplexityEstimator<T> {
    fn new() -> Self {
        Self {
            computational_complexity: scirs2_core::numeric::NumCast::from(0.5)
                .unwrap_or_else(|| T::zero()),
            sample_complexity: scirs2_core::numeric::NumCast::from(0.5)
                .unwrap_or_else(|| T::zero()),
            model_complexity: scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero()),
            generalization_complexity: scirs2_core::numeric::NumCast::from(0.5)
                .unwrap_or_else(|| T::zero()),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> LocalGeometryAnalyzer<T> {
    fn new() -> Self {
        Self {
            local_minima_detector: LocalMinimaDetector::new(),
            saddle_point_detector: SaddlePointDetector::new(),
            basin_analyzer: BasinAnalyzer::new(),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> GlobalStructureDetector<T> {
    fn new() -> Self {
        Self {
            connectivity_analyzer: ConnectivityAnalyzer::new(),
            symmetry_detector: SymmetryDetector::new(),
            pattern_recognizer: PatternRecognizer::new(),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> PredictorNetwork<T> {
    fn new(architecture: Vec<usize>) -> Result<Self> {
        let mut weights = Vec::new();
        let mut biases = Vec::new();
        let activations = vec![ActivationType::ReLU; architecture.len() - 1];

        for i in 0..architecture.len() - 1 {
            let weight = Array2::zeros((architecture[i + 1], architecture[i]));
            let bias = Array1::zeros(architecture[i + 1]);
            weights.push(weight);
            biases.push(bias);
        }

        Ok(Self {
            weights,
            biases,
            activations,
            architecture,
        })
    }
}

impl<T: Float + Debug + Send + Sync + 'static> PerformanceFeatureExtractor<T> {
    fn new(dims: usize) -> Result<Self> {
        Ok(Self {
            feature_dims: dims,
            feature_cache: HashMap::new(),
            importance_weights: Array1::ones(dims),
        })
    }
}

impl<T: Float + Debug + Send + Sync + 'static> PredictionCache<T> {
    fn new(capacity: usize) -> Self {
        Self {
            predictions: HashMap::new(),
            hit_rate: 0.0,
            capacity,
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> UncertaintyEstimator<T> {
    fn new(method: UncertaintyMethod) -> Self {
        Self {
            epistemic_uncertainty: scirs2_core::numeric::NumCast::from(0.1)
                .unwrap_or_else(|| T::zero()),
            aleatoric_uncertainty: scirs2_core::numeric::NumCast::from(0.05)
                .unwrap_or_else(|| T::zero()),
            total_uncertainty: scirs2_core::numeric::NumCast::from(0.15)
                .unwrap_or_else(|| T::zero()),
            estimation_method: method,
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> LocalMinimaDetector<T> {
    fn new() -> Self {
        Self {
            threshold: scirs2_core::numeric::NumCast::from(1e-6).unwrap_or_else(|| T::zero()),
            detected_minima: Vec::new(),
            algorithm: MinimaDetectionAlgorithm::GradientBased,
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> SaddlePointDetector<T> {
    fn new() -> Self {
        Self {
            threshold: scirs2_core::numeric::NumCast::from(1e-6).unwrap_or_else(|| T::zero()),
            detected_saddles: Vec::new(),
            algorithm: SaddleDetectionAlgorithm::EigenvalueBased,
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> BasinAnalyzer<T> {
    fn new() -> Self {
        Self {
            basin_characteristics: Vec::new(),
            analysis_method: BasinAnalysisMethod::GradientFlow,
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> ConnectivityAnalyzer<T> {
    fn new() -> Self {
        Self {
            connectivity_graph: Array2::zeros((0, 0)),
            path_analysis: PathAnalysisResults {
                shortest_paths: Vec::new(),
                path_difficulties: Vec::new(),
                connectivity_measure: T::zero(),
            },
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> SymmetryDetector<T> {
    fn new() -> Self {
        Self {
            symmetries: Vec::new(),
            symmetry_types: Vec::new(),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> PatternRecognizer<T> {
    fn new() -> Self {
        Self {
            patterns: Vec::new(),
            pattern_library: PatternLibrary {
                patterns: HashMap::new(),
                pattern_index: HashMap::new(),
                usage_stats: HashMap::new(),
            },
        }
    }
}

// Default implementations
impl<T: Float + Debug + Send + Sync + 'static> Default for LandscapeFeatures<T> {
    fn default() -> Self {
        Self {
            smoothness: scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero()),
            multimodality: scirs2_core::numeric::NumCast::from(0.3).unwrap_or_else(|| T::zero()),
            noise_level: scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()),
            curvature: CurvatureInfo::default(),
            gradient_characteristics: GradientCharacteristics::default(),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> Default for CurvatureInfo<T> {
    fn default() -> Self {
        Self {
            mean_curvature: scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()),
            gaussian_curvature: scirs2_core::numeric::NumCast::from(0.05)
                .unwrap_or_else(|| T::zero()),
            principal_curvatures: vec![
                scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()),
                scirs2_core::numeric::NumCast::from(-0.05).unwrap_or_else(|| T::zero()),
            ],
            condition_number: scirs2_core::numeric::NumCast::from(10.0)
                .unwrap_or_else(|| T::zero()),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> Default for GradientCharacteristics<T> {
    fn default() -> Self {
        Self {
            gradient_norm: scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()),
            consistency: scirs2_core::numeric::NumCast::from(0.8).unwrap_or_else(|| T::zero()),
            noise_ratio: scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()),
            correlation: scirs2_core::numeric::NumCast::from(0.7).unwrap_or_else(|| T::zero()),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> Default for CompressionParams<T> {
    fn default() -> Self {
        Self {
            target_ratio: scirs2_core::numeric::NumCast::from(0.5).unwrap_or_else(|| T::zero()),
            quality_threshold: scirs2_core::numeric::NumCast::from(0.95)
                .unwrap_or_else(|| T::zero()),
            max_time: 1000,
            strength: scirs2_core::numeric::NumCast::from(1.0).unwrap_or_else(|| T::zero()),
        }
    }
}

impl<T: Float + Debug + Send + Sync + 'static> Default for CompressionQualityMetrics<T> {
    fn default() -> Self {
        Self {
            reconstruction_error: scirs2_core::numeric::NumCast::from(0.05)
                .unwrap_or_else(|| T::zero()),
            information_loss: scirs2_core::numeric::NumCast::from(0.1).unwrap_or_else(|| T::zero()),
            compression_ratio: scirs2_core::numeric::NumCast::from(0.5)
                .unwrap_or_else(|| T::zero()),
            compression_time: 100,
        }
    }
}

impl Default for ResourceConstraints {
    fn default() -> Self {
        Self {
            max_memory: 8192,
            max_computation_time: 5000,
            max_parameters: 1_000_000,
            energy_budget: None,
        }
    }
}

impl Default for ArchitectureSearchSpace {
    fn default() -> Self {
        Self {
            layer_count_range: (2, 12),
            hidden_size_options: vec![128, 256, 512, 768, 1024],
            attention_head_options: vec![4, 8, 12, 16],
            ff_dim_options: vec![512, 1024, 2048, 4096],
            activation_options: vec![
                ActivationType::ReLU,
                ActivationType::GELU,
                ActivationType::Swish,
            ],
        }
    }
}

/// Adaptive Transformer optimizer configuration
#[derive(Debug, Clone)]
pub struct AdaptiveTransformerOptimizerConfig {
    /// Base learned optimizer config
    pub base_config: super::LearnedOptimizerConfig,

    /// Model dimension
    pub model_dim: usize,

    /// Number of attention heads
    pub num_heads: usize,

    /// Feed-forward dimension
    pub ff_dim: usize,

    /// Number of layers
    pub num_layers: usize,

    /// Maximum sequence length
    pub max_sequence_length: usize,

    /// Attention dropout rate
    pub attention_dropout: f64,

    /// Feed-forward dropout rate
    pub ff_dropout: f64,

    /// Layer normalization epsilon
    pub layer_norm_eps: f64,

    /// Pre-layer normalization flag
    pub pre_layer_norm: bool,

    /// Positional encoding type
    pub pos_encoding_type: PositionalEncodingType,

    /// Relative position bias flag
    pub relative_position_bias: bool,

    /// Use RoPE (Rotary Position Embedding)
    pub use_rope: bool,

    /// Gradient checkpointing flag
    pub gradient_checkpointing: bool,

    /// Attention optimization configuration
    pub attention_optimization: AttentionOptimization<f64>,

    /// Multi-scale attention flag
    pub multi_scale_attention: bool,

    /// Cross-attention flag
    pub cross_attention: bool,
}

#[derive(Debug, Clone, Copy)]
pub enum PositionalEncodingType {
    Sinusoidal,
    Learned,
    Rotary,
    Relative,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_adaptive_transformer_creation() {
        let config = AdaptiveConfig::<f64>::default();
        let enhancement = AdaptiveTransformerEnhancement::<f64>::new(config);
        assert!(enhancement.is_ok());
    }

    #[test]
    fn test_positional_encoding_types() {
        let encoding_type = PositionalEncodingType::Learned;
        assert!(matches!(encoding_type, PositionalEncodingType::Learned));
    }
}