optirs-tpu 0.3.1

// Performance profiling integration for XLA executables
//
// This module provides comprehensive profiling capabilities for XLA executables
// running on TPU hardware, including performance counters, trace collection,
// memory profiling, and power consumption tracking.

use scirs2_core::numeric::Float;
use std::collections::{BTreeMap, HashMap, VecDeque};
use std::fmt::Debug;
use std::fs::File;
use std::io::Write;
use std::sync::{Arc, Mutex, RwLock};
use std::time::{Duration, Instant, SystemTime};

use super::super::frontend::XLAComputation;
use super::BackendConfig;
use crate::error::{OptimError, Result};

/// Profiling integration manager
pub struct ProfilingIntegration<T> {
    /// Profiling configuration
    config: ProfilingConfig,

    /// Performance counter manager
    counter_manager: PerformanceCounterManager,

    /// Trace collector
    trace_collector: TraceCollector,

    /// Memory profiler
    memory_profiler: MemoryProfiler,

    /// Power profiler
    power_profiler: PowerProfiler,

    /// Timeline profiler
    timeline_profiler: TimelineProfiler<T>,

    /// Profiling data aggregator
    data_aggregator: ProfilingDataAggregator,

    /// Export manager
    export_manager: ProfileExportManager,

    /// Profiling statistics
    profiling_stats: ProfilingStatistics,
}

/// Profiling configuration
#[derive(Debug, Clone)]
pub struct ProfilingConfig {
    /// Enable performance counter collection
    pub enable_perf_counters: bool,

    /// Enable trace collection
    pub enable_trace_collection: bool,

    /// Enable memory profiling
    pub enable_memory_profiling: bool,

    /// Enable power profiling
    pub enable_power_profiling: bool,

    /// Enable timeline profiling
    pub enable_timeline_profiling: bool,

    /// Sampling rate (Hz)
    pub sampling_rate: u64,

    /// Maximum trace buffer size (MB)
    pub max_trace_buffer_mb: usize,

    /// Profile output directory
    pub output_directory: String,

    /// Export format
    pub export_format: ExportFormat,

    /// Detailed profiling mode
    pub detailed_mode: bool,
}

/// Export formats for profiling data
#[derive(Debug, Clone)]
pub enum ExportFormat {
    /// JSON format
    JSON,

    /// Protocol buffers
    ProtoBuf,

    /// Chrome trace format
    ChromeTrace,

    /// CSV format
    CSV,

    /// Binary format
    Binary,
}

/// Profiling statistics
#[derive(Debug, Default)]
pub struct ProfilingStatistics {
    /// Total samples collected
    pub samples_collected: u64,

    /// Trace events captured
    pub trace_events: u64,

    /// Memory snapshots taken
    pub memory_snapshots: u64,

    /// Power samples collected
    pub power_samples: u64,

    /// Profiling overhead (microseconds)
    pub profiling_overhead_us: u64,

    /// Data export time (microseconds)
    pub export_time_us: u64,
}

/// Performance counter manager
pub struct PerformanceCounterManager {
    /// Available counters
    available_counters: HashMap<String, CounterInfo>,

    /// Active counter sessions
    active_sessions: HashMap<String, CounterSession>,

    /// Counter data storage
    counter_data: Arc<RwLock<HashMap<String, CounterTimeSeries>>>,

    /// Counter configuration
    counter_config: CounterConfig,
}

/// Performance counter information
#[derive(Debug, Clone)]
pub struct CounterInfo {
    /// Counter name
    pub name: String,

    /// Counter description
    pub description: String,

    /// Counter type
    pub counter_type: CounterType,

    /// Units of measurement
    pub units: String,

    /// Sampling granularity
    pub granularity: CounterGranularity,

    /// Hardware dependency
    pub hardware_dependency: Option<String>,
}

/// Types of performance counters
#[derive(Debug, Clone)]
pub enum CounterType {
    /// Cumulative counter (always increasing)
    Cumulative,

    /// Gauge counter (point-in-time value)
    Gauge,

    /// Rate counter (per-second rate)
    Rate,

    /// Histogram counter
    Histogram,
}

/// Counter granularity levels
#[derive(Debug, Clone)]
pub enum CounterGranularity {
    /// Per-instruction granularity
    Instruction,

    /// Per-operation granularity
    Operation,

    /// Per-kernel granularity
    Kernel,

    /// Per-execution granularity
    Execution,

    /// System-wide granularity
    System,
}

/// Counter session for tracking active profiling
#[derive(Debug)]
pub struct CounterSession {
    /// Session ID
    pub id: String,

    /// Session start time
    pub start_time: Instant,

    /// Enabled counters
    pub enabled_counters: Vec<String>,

    /// Sample buffer
    pub sample_buffer: VecDeque<CounterSample>,

    /// Session configuration
    pub config: SessionConfig,
}

/// Counter sample
#[derive(Debug, Clone)]
pub struct CounterSample {
    /// Sample timestamp
    pub timestamp: Instant,

    /// Counter name
    pub counter_name: String,

    /// Sample value
    pub value: CounterValue,

    /// Associated context
    pub context: Option<String>,
}

/// Counter value types
#[derive(Debug, Clone)]
pub enum CounterValue {
    /// Integer value
    Integer(i64),

    /// Floating point value
    Float(f64),

    /// Boolean value
    Boolean(bool),

    /// String value
    String(String),

    /// Histogram value
    Histogram(Vec<(f64, u64)>),
}

/// Time series data for counters
#[derive(Debug)]
pub struct CounterTimeSeries {
    /// Counter name
    pub counter_name: String,

    /// Time series samples
    pub samples: Vec<(Instant, CounterValue)>,

    /// Aggregate statistics
    pub statistics: TimeSeriesStats,
}

/// Time series statistics
#[derive(Debug, Default)]
pub struct TimeSeriesStats {
    /// Minimum value
    pub min: f64,

    /// Maximum value
    pub max: f64,

    /// Average value
    pub average: f64,

    /// Standard deviation
    pub std_dev: f64,

    /// Sample count
    pub sample_count: usize,
}

/// Session configuration
#[derive(Debug, Clone)]
pub struct SessionConfig {
    /// Sampling interval (microseconds)
    pub sampling_interval_us: u64,

    /// Buffer size (samples)
    pub buffer_size: usize,

    /// Auto-flush threshold
    pub auto_flush_threshold: usize,

    /// Include context information
    pub include_context: bool,
}

/// Counter configuration
#[derive(Debug)]
pub struct CounterConfig {
    /// Default sampling rate
    pub default_sampling_rate: u64,

    /// Counter groups
    pub counter_groups: HashMap<String, Vec<String>>,

    /// Counter aliases
    pub aliases: HashMap<String, String>,
}

/// Trace collector for execution traces
pub struct TraceCollector {
    /// Trace buffer
    trace_buffer: Arc<Mutex<TraceBuffer>>,

    /// Trace sessions
    trace_sessions: HashMap<String, TraceSession>,

    /// Event filters
    event_filters: Vec<EventFilter>,

    /// Trace configuration
    trace_config: TraceConfig,
}

/// Trace buffer for storing events
#[derive(Debug)]
pub struct TraceBuffer {
    /// Events in the buffer
    pub events: VecDeque<TraceEvent>,

    /// Maximum buffer size
    pub max_size: usize,

    /// Current buffer size (bytes)
    pub current_size: usize,

    /// Buffer statistics
    pub stats: BufferStats,
}

/// Trace event
#[derive(Debug, Clone)]
pub struct TraceEvent {
    /// Event ID
    pub id: u64,

    /// Event timestamp
    pub timestamp: Instant,

    /// Event type
    pub event_type: EventType,

    /// Event phase
    pub phase: EventPhase,

    /// Associated thread ID
    pub thread_id: Option<u64>,

    /// Associated process ID
    pub process_id: Option<u64>,

    /// Event name
    pub name: String,

    /// Event category
    pub category: String,

    /// Event duration (for duration events)
    pub duration: Option<Duration>,

    /// Event arguments
    pub args: HashMap<String, String>,

    /// Stack trace
    pub stack_trace: Option<Vec<String>>,
}

/// Types of trace events
#[derive(Debug, Clone)]
pub enum EventType {
    /// Function call
    FunctionCall,

    /// Kernel execution
    KernelExecution,

    /// Memory operation
    MemoryOperation,

    /// Communication operation
    Communication,

    /// Synchronization
    Synchronization,

    /// Resource allocation
    ResourceAllocation,

    /// Custom event
    Custom(String),
}

/// Event phases
#[derive(Debug, Clone)]
pub enum EventPhase {
    /// Begin phase
    Begin,

    /// End phase
    End,

    /// Instant event
    Instant,

    /// Complete event (begin + end)
    Complete,

    /// Async begin
    AsyncBegin,

    /// Async end
    AsyncEnd,
}

/// Trace session
#[derive(Debug)]
pub struct TraceSession {
    /// Session ID
    pub id: String,

    /// Session start time
    pub start_time: Instant,

    /// Enabled event types
    pub enabled_events: Vec<EventType>,

    /// Session buffer
    pub session_buffer: Vec<TraceEvent>,

    /// Session metadata
    pub metadata: TraceMetadata,
}

/// Trace metadata
#[derive(Debug, Default)]
pub struct TraceMetadata {
    /// Session name
    pub session_name: String,

    /// Target executable
    pub target_executable: Option<String>,

    /// Hardware information
    pub hardware_info: HashMap<String, String>,

    /// Software information
    pub software_info: HashMap<String, String>,
}

/// Event filter for trace collection
#[derive(Debug)]
pub struct EventFilter {
    /// Filter name
    pub name: String,

    /// Event type filter
    pub event_type_filter: Option<EventType>,

    /// Category filter
    pub category_filter: Option<String>,

    /// Duration threshold (minimum)
    pub duration_threshold: Option<Duration>,

    /// Include/exclude flag
    pub include: bool,
}

/// Buffer statistics
#[derive(Debug, Default)]
pub struct BufferStats {
    /// Events written
    pub events_written: u64,

    /// Events dropped
    pub events_dropped: u64,

    /// Buffer overruns
    pub overruns: u64,

    /// Peak buffer usage
    pub peak_usage: usize,
}

/// Trace configuration
#[derive(Debug)]
pub struct TraceConfig {
    /// Buffer size (events)
    pub buffer_size: usize,

    /// Include stack traces
    pub include_stack_traces: bool,

    /// Maximum stack trace depth
    pub max_stack_depth: usize,

    /// Event compression
    pub enable_compression: bool,
}

/// Memory profiler
pub struct MemoryProfiler {
    /// Memory tracking sessions
    tracking_sessions: HashMap<String, MemoryTrackingSession>,

    /// Allocation tracker
    allocation_tracker: AllocationTracker,

    /// Memory usage snapshots
    usage_snapshots: Vec<MemorySnapshot>,

    /// Memory configuration
    memory_config: MemoryProfilingConfig,
}

/// Memory tracking session
#[derive(Debug)]
pub struct MemoryTrackingSession {
    /// Session ID
    pub id: String,

    /// Session start time
    pub start_time: Instant,

    /// Tracked allocations
    pub allocations: HashMap<usize, AllocationInfo>,

    /// Memory statistics
    pub stats: MemoryTrackingStats,
}

/// Allocation information
#[derive(Debug)]
pub struct AllocationInfo {
    /// Allocation address
    pub address: usize,

    /// Allocation size
    pub size: usize,

    /// Allocation timestamp
    pub timestamp: Instant,

    /// Allocation source
    pub source: AllocationSource,

    /// Stack trace at allocation
    pub stack_trace: Option<Vec<String>>,

    /// Allocation tags
    pub tags: Vec<String>,
}

/// Allocation sources
#[derive(Debug)]
pub enum AllocationSource {
    /// Kernel execution
    Kernel(String),

    /// Runtime system
    Runtime,

    /// User code
    User,

    /// Unknown source
    Unknown,
}

/// Memory tracking statistics
#[derive(Debug, Default)]
pub struct MemoryTrackingStats {
    /// Total allocations
    pub total_allocations: usize,

    /// Total deallocations
    pub total_deallocations: usize,

    /// Current allocation count
    pub current_allocations: usize,

    /// Peak memory usage (bytes)
    pub peak_memory_usage: usize,

    /// Current memory usage (bytes)
    pub current_memory_usage: usize,

    /// Memory fragmentation ratio
    pub fragmentation_ratio: f64,
}

/// Allocation tracker
pub struct AllocationTracker {
    /// Active allocations
    active_allocations: HashMap<usize, AllocationInfo>,

    /// Allocation history
    allocation_history: Vec<AllocationEvent>,

    /// Tracker configuration
    tracker_config: TrackerConfig,
}

/// Allocation event
#[derive(Debug)]
pub struct AllocationEvent {
    /// Event timestamp
    pub timestamp: Instant,

    /// Event type
    pub event_type: AllocationEventType,

    /// Allocation address
    pub address: usize,

    /// Allocation size
    pub size: usize,

    /// Associated context
    pub context: Option<String>,
}

/// Types of allocation events
#[derive(Debug)]
pub enum AllocationEventType {
    /// Memory allocation
    Allocate,

    /// Memory deallocation
    Deallocate,

    /// Memory reallocation
    Reallocate,
}

/// Tracker configuration
#[derive(Debug)]
pub struct TrackerConfig {
    /// Track stack traces
    pub track_stack_traces: bool,

    /// Maximum history size
    pub max_history_size: usize,

    /// Enable leak detection
    pub enable_leak_detection: bool,
}

/// Memory snapshot
#[derive(Debug)]
pub struct MemorySnapshot {
    /// Snapshot timestamp
    pub timestamp: Instant,

    /// Memory regions
    pub regions: Vec<MemoryRegion>,

    /// Total memory usage
    pub total_usage: usize,

    /// Fragmentation information
    pub fragmentation: FragmentationInfo,
}

/// Memory region information
#[derive(Debug)]
pub struct MemoryRegion {
    /// Region start address
    pub start_address: usize,

    /// Region size
    pub size: usize,

    /// Region type
    pub region_type: MemoryRegionType,

    /// Usage information
    pub usage: RegionUsage,
}

/// Memory region types
#[derive(Debug)]
pub enum MemoryRegionType {
    /// Code region
    Code,

    /// Data region
    Data,

    /// Stack region
    Stack,

    /// Heap region
    Heap,

    /// Device memory region
    Device,
}

/// Region usage information
#[derive(Debug)]
pub struct RegionUsage {
    /// Used bytes
    pub used_bytes: usize,

    /// Free bytes
    pub free_bytes: usize,

    /// Fragmentation level
    pub fragmentation: f64,
}

/// Fragmentation information
#[derive(Debug, Default)]
pub struct FragmentationInfo {
    /// External fragmentation
    pub external_fragmentation: f64,

    /// Internal fragmentation
    pub internal_fragmentation: f64,

    /// Largest free block
    pub largest_free_block: usize,

    /// Free block count
    pub free_block_count: usize,
}

/// Memory profiling configuration
#[derive(Debug)]
pub struct MemoryProfilingConfig {
    /// Snapshot interval (milliseconds)
    pub snapshot_interval_ms: u64,

    /// Track individual allocations
    pub track_allocations: bool,

    /// Maximum snapshots to keep
    pub max_snapshots: usize,

    /// Enable heap profiling
    pub enable_heap_profiling: bool,
}

/// Power profiler
pub struct PowerProfiler {
    /// Power monitoring sessions
    monitoring_sessions: HashMap<String, PowerMonitoringSession>,

    /// Power samples
    power_samples: Vec<PowerSample>,

    /// Power configuration
    power_config: PowerProfilingConfig,

    /// Power model
    power_model: PowerModel,
}

/// Power monitoring session
#[derive(Debug)]
pub struct PowerMonitoringSession {
    /// Session ID
    pub id: String,

    /// Session start time
    pub start_time: Instant,

    /// Monitored components
    pub components: Vec<PowerComponent>,

    /// Session samples
    pub samples: Vec<PowerSample>,
}

/// Power component
#[derive(Debug, Clone)]
pub enum PowerComponent {
    /// CPU power
    CPU,

    /// TPU power
    TPU,

    /// Memory power
    Memory,

    /// Interconnect power
    Interconnect,

    /// Total system power
    System,
}

/// Power sample
#[derive(Debug, Clone)]
pub struct PowerSample {
    /// Sample timestamp
    pub timestamp: Instant,

    /// Component
    pub component: PowerComponent,

    /// Power consumption (watts)
    pub power_watts: f64,

    /// Voltage (volts)
    pub voltage: Option<f64>,

    /// Current (amperes)
    pub current: Option<f64>,

    /// Temperature (celsius)
    pub temperature: Option<f64>,
}

/// Power profiling configuration
#[derive(Debug)]
pub struct PowerProfilingConfig {
    /// Sampling rate (Hz)
    pub sampling_rate: u64,

    /// Enable component-level monitoring
    pub component_level_monitoring: bool,

    /// Include thermal information
    pub include_thermal: bool,

    /// Power model accuracy
    pub model_accuracy: PowerModelAccuracy,
}

/// Power model accuracy levels
#[derive(Debug)]
pub enum PowerModelAccuracy {
    /// Low accuracy (fast)
    Low,

    /// Medium accuracy
    Medium,

    /// High accuracy (detailed)
    High,
}

/// Power model
pub struct PowerModel {
    /// Model parameters
    parameters: HashMap<String, f64>,

    /// Component models
    component_models: HashMap<PowerComponent, ComponentPowerModel>,
}

/// Component power model
#[derive(Debug)]
pub struct ComponentPowerModel {
    /// Base power consumption
    pub base_power: f64,

    /// Dynamic power factors
    pub dynamic_factors: HashMap<String, f64>,

    /// Thermal coefficients
    pub thermal_coefficients: Vec<f64>,
}

/// Timeline profiler
pub struct TimelineProfiler<T> {
    /// Timeline sessions
    sessions: HashMap<String, TimelineSession>,

    /// Timeline data
    timeline_data: Vec<TimelineEntry>,

    /// Timeline configuration
    timeline_config: TimelineConfig,

    _phantom: std::marker::PhantomData<T>,
}

/// Timeline session
#[derive(Debug)]
pub struct TimelineSession {
    /// Session ID
    pub id: String,

    /// Session start time
    pub start_time: Instant,

    /// Tracked operations
    pub operations: HashMap<String, OperationTimeline>,

    /// Session metadata
    pub metadata: TimelineMetadata,
}

/// Operation timeline
#[derive(Debug)]
pub struct OperationTimeline {
    /// Operation ID
    pub operation_id: String,

    /// Start time
    pub start_time: Instant,

    /// End time
    pub end_time: Option<Instant>,

    /// Timeline events
    pub events: Vec<TimelineEvent>,

    /// Resource usage timeline
    pub resource_usage: Vec<ResourceUsagePoint>,
}

/// Timeline event
#[derive(Debug)]
pub struct TimelineEvent {
    /// Event timestamp
    pub timestamp: Instant,

    /// Event description
    pub description: String,

    /// Event data
    pub data: HashMap<String, String>,
}

/// Resource usage point in timeline
#[derive(Debug)]
pub struct ResourceUsagePoint {
    /// Timestamp
    pub timestamp: Instant,

    /// CPU utilization (0.0-1.0)
    pub cpu_utilization: f64,

    /// Memory usage (bytes)
    pub memory_usage: usize,

    /// TPU utilization (0.0-1.0)
    pub tpu_utilization: f64,

    /// Power consumption (watts)
    pub power_consumption: f64,
}

/// Timeline entry
#[derive(Debug)]
pub struct TimelineEntry {
    /// Entry timestamp
    pub timestamp: Instant,

    /// Entry type
    pub entry_type: TimelineEntryType,

    /// Associated operation
    pub operation_id: Option<String>,

    /// Entry data
    pub data: TimelineEntryData,
}

/// Timeline entry types
#[derive(Debug)]
pub enum TimelineEntryType {
    /// Operation start
    OperationStart,

    /// Operation end
    OperationEnd,

    /// Resource allocation
    ResourceAllocation,

    /// Memory event
    MemoryEvent,

    /// Performance counter event
    CounterEvent,
}

/// Timeline entry data
#[derive(Debug)]
pub enum TimelineEntryData {
    /// Operation data
    Operation(OperationTimelineData),

    /// Resource data
    Resource(ResourceTimelineData),

    /// Memory data
    Memory(MemoryTimelineData),

    /// Counter data
    Counter(CounterTimelineData),
}

/// Operation timeline data
#[derive(Debug)]
pub struct OperationTimelineData {
    /// Operation name
    pub name: String,

    /// Input sizes
    pub input_sizes: Vec<usize>,

    /// Output sizes
    pub output_sizes: Vec<usize>,

    /// Compute intensity
    pub compute_intensity: f64,
}

/// Resource timeline data
#[derive(Debug)]
pub struct ResourceTimelineData {
    /// Resource type
    pub resource_type: String,

    /// Resource amount
    pub amount: usize,

    /// Utilization
    pub utilization: f64,
}

/// Memory timeline data
#[derive(Debug)]
pub struct MemoryTimelineData {
    /// Memory operation type
    pub operation_type: String,

    /// Memory address
    pub address: usize,

    /// Operation size
    pub size: usize,
}

/// Counter timeline data
#[derive(Debug)]
pub struct CounterTimelineData {
    /// Counter name
    pub counter_name: String,

    /// Counter value
    pub value: CounterValue,

    /// Counter delta
    pub delta: Option<f64>,
}

/// Timeline metadata
#[derive(Debug, Default)]
pub struct TimelineMetadata {
    /// Session name
    pub session_name: String,

    /// Start time
    pub start_time: Option<SystemTime>,

    /// End time
    pub end_time: Option<SystemTime>,

    /// Total operations
    pub total_operations: usize,
}

/// Timeline configuration
#[derive(Debug)]
pub struct TimelineConfig {
    /// Enable detailed operation tracking
    pub detailed_operations: bool,

    /// Include resource usage
    pub include_resources: bool,

    /// Timeline resolution (microseconds)
    pub resolution_us: u64,

    /// Maximum timeline entries
    pub max_entries: usize,
}

/// Profiling data aggregator
pub struct ProfilingDataAggregator {
    /// Aggregated data
    aggregated_data: HashMap<String, AggregatedMetrics>,

    /// Aggregation configuration
    aggregation_config: AggregationConfig,
}

/// Aggregated metrics
#[derive(Debug, Default)]
pub struct AggregatedMetrics {
    /// Performance metrics
    pub performance: PerformanceMetrics,

    /// Memory metrics
    pub memory: MemoryMetrics,

    /// Power metrics
    pub power: PowerMetrics,

    /// Timeline metrics
    pub timeline: TimelineMetrics,
}

/// Performance metrics
#[derive(Debug, Default)]
pub struct PerformanceMetrics {
    /// Average execution time
    pub avg_execution_time_us: f64,

    /// Throughput (operations per second)
    pub throughput: f64,

    /// Compute utilization
    pub compute_utilization: f64,

    /// Memory bandwidth utilization
    pub memory_bandwidth_util: f64,
}

/// Memory metrics
#[derive(Debug, Default)]
pub struct MemoryMetrics {
    /// Peak memory usage
    pub peak_usage_bytes: usize,

    /// Average memory usage
    pub avg_usage_bytes: f64,

    /// Memory efficiency
    pub efficiency: f64,

    /// Allocation rate
    pub allocation_rate: f64,
}

/// Power metrics
#[derive(Debug, Default)]
pub struct PowerMetrics {
    /// Average power consumption
    pub avg_power_watts: f64,

    /// Peak power consumption
    pub peak_power_watts: f64,

    /// Energy consumed
    pub energy_joules: f64,

    /// Power efficiency
    pub efficiency: f64,
}

/// Timeline metrics
#[derive(Debug, Default)]
pub struct TimelineMetrics {
    /// Total operations
    pub total_operations: usize,

    /// Average operation duration
    pub avg_operation_duration_us: f64,

    /// Critical path length
    pub critical_path_length_us: u64,

    /// Parallelization efficiency
    pub parallelization_efficiency: f64,
}

/// Aggregation configuration
#[derive(Debug)]
pub struct AggregationConfig {
    /// Aggregation interval (seconds)
    pub interval_seconds: u64,

    /// Enable real-time aggregation
    pub real_time: bool,

    /// Retention period (hours)
    pub retention_hours: u32,
}

/// Profile export manager
pub struct ProfileExportManager {
    /// Export configuration
    export_config: ExportConfig,

    /// Export statistics
    export_stats: ExportStatistics,
}

/// Export configuration
#[derive(Debug)]
pub struct ExportConfig {
    /// Output format
    pub format: ExportFormat,

    /// Output directory
    pub output_dir: String,

    /// Include raw data
    pub include_raw_data: bool,

    /// Compression enabled
    pub compression: bool,

    /// Export metadata
    pub include_metadata: bool,
}

/// Export statistics
#[derive(Debug, Default)]
pub struct ExportStatistics {
    /// Files exported
    pub files_exported: usize,

    /// Total export size (bytes)
    pub total_size_bytes: usize,

    /// Export time (microseconds)
    pub export_time_us: u64,

    /// Compression ratio
    pub compression_ratio: f64,
}

impl<T: Float + Debug + Send + Sync + 'static> ProfilingIntegration<T> {
    /// Create new profiling integration
    pub fn new(config: &BackendConfig) -> Self {
        let profiling_config = ProfilingConfig {
            enable_perf_counters: config.enable_profiling,
            enable_trace_collection: config.enable_profiling,
            enable_memory_profiling: config.enable_profiling,
            enable_power_profiling: false,
            enable_timeline_profiling: config.enable_profiling,
            sampling_rate: 1000, // 1kHz
            max_trace_buffer_mb: 100,
            output_directory: "/tmp/scirs_profiles".to_string(),
            export_format: ExportFormat::JSON,
            detailed_mode: config.debug_mode,
        };

        Self {
            counter_manager: PerformanceCounterManager::new(),
            trace_collector: TraceCollector::new(&profiling_config),
            memory_profiler: MemoryProfiler::new(&profiling_config),
            power_profiler: PowerProfiler::new(&profiling_config),
            timeline_profiler: TimelineProfiler::new(&profiling_config),
            data_aggregator: ProfilingDataAggregator::new(),
            export_manager: ProfileExportManager::new(&profiling_config),
            config: profiling_config,
            profiling_stats: ProfilingStatistics::default(),
        }
    }

    /// Setup profiling for computation
    pub fn setup_profiling(
        &mut self,
        _computation: &XLAComputation<T>,
        _binary: &[u8],
    ) -> Result<()> {
        if self.config.enable_perf_counters {
            self.counter_manager.start_session("main_session")?;
        }

        if self.config.enable_trace_collection {
            self.trace_collector.start_tracing("main_trace")?;
        }

        if self.config.enable_memory_profiling {
            self.memory_profiler.start_tracking("main_memory")?;
        }

        if self.config.enable_timeline_profiling {
            self.timeline_profiler.start_timeline("main_timeline")?;
        }

        Ok(())
    }

    /// Export profiling data
    pub fn export_data(&mut self) -> Result<Vec<String>> {
        let mut exported_files = Vec::new();

        // Export performance counter data
        if self.config.enable_perf_counters {
            let file_path = self
                .export_manager
                .export_counter_data(&self.counter_manager)?;
            exported_files.push(file_path);
        }

        // Export trace data
        if self.config.enable_trace_collection {
            let file_path = self
                .export_manager
                .export_trace_data(&self.trace_collector)?;
            exported_files.push(file_path);
        }

        // Export memory data
        if self.config.enable_memory_profiling {
            let file_path = self
                .export_manager
                .export_memory_data(&self.memory_profiler)?;
            exported_files.push(file_path);
        }

        Ok(exported_files)
    }

    /// Reset profiling state
    pub fn reset(&mut self) {
        self.profiling_stats = ProfilingStatistics::default();
        self.counter_manager.reset();
        self.trace_collector.reset();
        self.memory_profiler.reset();
        self.timeline_profiler.reset();
    }
}

impl Default for PerformanceCounterManager {
    fn default() -> Self {
        Self::new()
    }
}

impl PerformanceCounterManager {
    /// Create new performance counter manager
    pub fn new() -> Self {
        let mut available_counters = HashMap::new();

        // Add common TPU performance counters
        available_counters.insert(
            "matrix_ops".to_string(),
            CounterInfo {
                name: "matrix_ops".to_string(),
                description: "Matrix operations executed".to_string(),
                counter_type: CounterType::Cumulative,
                units: "operations".to_string(),
                granularity: CounterGranularity::Operation,
                hardware_dependency: Some("matrix_unit".to_string()),
            },
        );

        available_counters.insert(
            "memory_bandwidth".to_string(),
            CounterInfo {
                name: "memory_bandwidth".to_string(),
                description: "Memory bandwidth utilization".to_string(),
                counter_type: CounterType::Gauge,
                units: "GB/s".to_string(),
                granularity: CounterGranularity::System,
                hardware_dependency: Some("memory_controller".to_string()),
            },
        );

        Self {
            available_counters,
            active_sessions: HashMap::new(),
            counter_data: Arc::new(RwLock::new(HashMap::new())),
            counter_config: CounterConfig {
                default_sampling_rate: 1000,
                counter_groups: HashMap::new(),
                aliases: HashMap::new(),
            },
        }
    }

    /// Start counter session
    pub fn start_session(&mut self, session_id: &str) -> Result<()> {
        let session = CounterSession {
            id: session_id.to_string(),
            start_time: Instant::now(),
            enabled_counters: self.available_counters.keys().cloned().collect(),
            sample_buffer: VecDeque::new(),
            config: SessionConfig {
                sampling_interval_us: 1000, // 1ms
                buffer_size: 10000,
                auto_flush_threshold: 8000,
                include_context: true,
            },
        };

        self.active_sessions.insert(session_id.to_string(), session);
        Ok(())
    }

    /// Reset counter manager
    pub fn reset(&mut self) {
        self.active_sessions.clear();
        let mut data = self.counter_data.write().expect("lock poisoned");
        data.clear();
    }
}

impl TraceCollector {
    /// Create new trace collector
    pub fn new(config: &ProfilingConfig) -> Self {
        Self {
            trace_buffer: Arc::new(Mutex::new(TraceBuffer {
                events: VecDeque::new(),
                max_size: config.max_trace_buffer_mb * 1024 * 1024,
                current_size: 0,
                stats: BufferStats::default(),
            })),
            trace_sessions: HashMap::new(),
            event_filters: Vec::new(),
            trace_config: TraceConfig {
                buffer_size: 100000,
                include_stack_traces: config.detailed_mode,
                max_stack_depth: 32,
                enable_compression: true,
            },
        }
    }

    /// Start tracing session
    pub fn start_tracing(&mut self, session_id: &str) -> Result<()> {
        let session = TraceSession {
            id: session_id.to_string(),
            start_time: Instant::now(),
            enabled_events: vec![EventType::KernelExecution, EventType::MemoryOperation],
            session_buffer: Vec::new(),
            metadata: TraceMetadata::default(),
        };

        self.trace_sessions.insert(session_id.to_string(), session);
        Ok(())
    }

    /// Reset trace collector
    pub fn reset(&mut self) {
        self.trace_sessions.clear();
        let mut buffer = self.trace_buffer.lock().expect("lock poisoned");
        buffer.events.clear();
        buffer.current_size = 0;
        buffer.stats = BufferStats::default();
    }
}

impl MemoryProfiler {
    /// Create new memory profiler
    pub fn new(_config: &ProfilingConfig) -> Self {
        Self {
            tracking_sessions: HashMap::new(),
            allocation_tracker: AllocationTracker::new(),
            usage_snapshots: Vec::new(),
            memory_config: MemoryProfilingConfig {
                snapshot_interval_ms: 100,
                track_allocations: true,
                max_snapshots: 1000,
                enable_heap_profiling: true,
            },
        }
    }

    /// Start memory tracking
    pub fn start_tracking(&mut self, session_id: &str) -> Result<()> {
        let session = MemoryTrackingSession {
            id: session_id.to_string(),
            start_time: Instant::now(),
            allocations: HashMap::new(),
            stats: MemoryTrackingStats::default(),
        };

        self.tracking_sessions
            .insert(session_id.to_string(), session);
        Ok(())
    }

    /// Reset memory profiler
    pub fn reset(&mut self) {
        self.tracking_sessions.clear();
        self.usage_snapshots.clear();
        self.allocation_tracker.reset();
    }
}

impl Default for AllocationTracker {
    fn default() -> Self {
        Self::new()
    }
}

impl AllocationTracker {
    /// Create new allocation tracker
    pub fn new() -> Self {
        Self {
            active_allocations: HashMap::new(),
            allocation_history: Vec::new(),
            tracker_config: TrackerConfig {
                track_stack_traces: false,
                max_history_size: 100000,
                enable_leak_detection: true,
            },
        }
    }

    /// Reset allocation tracker
    pub fn reset(&mut self) {
        self.active_allocations.clear();
        self.allocation_history.clear();
    }
}

impl PowerProfiler {
    /// Create new power profiler
    pub fn new(_config: &ProfilingConfig) -> Self {
        Self {
            monitoring_sessions: HashMap::new(),
            power_samples: Vec::new(),
            power_config: PowerProfilingConfig {
                sampling_rate: 10, // 10Hz
                component_level_monitoring: true,
                include_thermal: true,
                model_accuracy: PowerModelAccuracy::Medium,
            },
            power_model: PowerModel {
                parameters: HashMap::new(),
                component_models: HashMap::new(),
            },
        }
    }
}

impl<T> TimelineProfiler<T> {
    /// Create new timeline profiler
    pub fn new(_config: &ProfilingConfig) -> Self {
        Self {
            sessions: HashMap::new(),
            timeline_data: Vec::new(),
            timeline_config: TimelineConfig {
                detailed_operations: true,
                include_resources: true,
                resolution_us: 1, // 1 microsecond resolution
                max_entries: 1000000,
            },
            _phantom: std::marker::PhantomData,
        }
    }

    /// Start timeline session
    pub fn start_timeline(&mut self, session_id: &str) -> Result<()> {
        let session = TimelineSession {
            id: session_id.to_string(),
            start_time: Instant::now(),
            operations: HashMap::new(),
            metadata: TimelineMetadata::default(),
        };

        self.sessions.insert(session_id.to_string(), session);
        Ok(())
    }

    /// Reset timeline profiler
    pub fn reset(&mut self) {
        self.sessions.clear();
        self.timeline_data.clear();
    }
}

impl Default for ProfilingDataAggregator {
    fn default() -> Self {
        Self::new()
    }
}

impl ProfilingDataAggregator {
    /// Create new data aggregator
    pub fn new() -> Self {
        Self {
            aggregated_data: HashMap::new(),
            aggregation_config: AggregationConfig {
                interval_seconds: 1,
                real_time: true,
                retention_hours: 24,
            },
        }
    }
}

impl ProfileExportManager {
    /// Create new export manager
    pub fn new(config: &ProfilingConfig) -> Self {
        Self {
            export_config: ExportConfig {
                format: config.export_format.clone(),
                output_dir: config.output_directory.clone(),
                include_raw_data: config.detailed_mode,
                compression: true,
                include_metadata: true,
            },
            export_stats: ExportStatistics::default(),
        }
    }

    /// Export counter data
    pub fn export_counter_data(
        &mut self,
        _counter_manager: &PerformanceCounterManager,
    ) -> Result<String> {
        let filename = format!(
            "{}/counters_{}.json",
            self.export_config.output_dir,
            SystemTime::now()
                .duration_since(SystemTime::UNIX_EPOCH)
                .map_err(|e| OptimError::from(e.to_string()))?
                .as_secs()
        );

        // Create output directory if it doesn't exist
        std::fs::create_dir_all(&self.export_config.output_dir)?;

        // Write placeholder data
        let mut file = File::create(&filename)?;
        writeln!(file, "{{\n  \"counters\": [],\n  \"metadata\": {{}}\n}}")?;

        self.export_stats.files_exported += 1;
        Ok(filename)
    }

    /// Export trace data
    pub fn export_trace_data(&mut self, _trace_collector: &TraceCollector) -> Result<String> {
        let filename = format!(
            "{}/trace_{}.json",
            self.export_config.output_dir,
            SystemTime::now()
                .duration_since(SystemTime::UNIX_EPOCH)
                .map_err(|e| OptimError::from(e.to_string()))?
                .as_secs()
        );

        std::fs::create_dir_all(&self.export_config.output_dir)?;

        let mut file = File::create(&filename)?;
        writeln!(
            file,
            "{{\n  \"traceEvents\": [],\n  \"displayTimeUnit\": \"ns\"\n}}"
        )?;

        self.export_stats.files_exported += 1;
        Ok(filename)
    }

    /// Export memory data
    pub fn export_memory_data(&mut self, _memory_profiler: &MemoryProfiler) -> Result<String> {
        let filename = format!(
            "{}/memory_{}.json",
            self.export_config.output_dir,
            SystemTime::now()
                .duration_since(SystemTime::UNIX_EPOCH)
                .map_err(|e| OptimError::from(e.to_string()))?
                .as_secs()
        );

        std::fs::create_dir_all(&self.export_config.output_dir)?;

        let mut file = File::create(&filename)?;
        writeln!(file, "{{\n  \"snapshots\": [],\n  \"allocations\": []\n}}")?;

        self.export_stats.files_exported += 1;
        Ok(filename)
    }
}

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

    #[test]
    fn test_profiling_integration_creation() {
        use super::super::{
            super::super::PodTopology, super::TPUConfig, super::TPUVersion, BackendConfig,
        };

        let tpu_config = TPUConfig {
            tpu_version: TPUVersion::V4,
            num_cores: 8,
            enable_xla: true,
            xla_optimization_level: crate::main_types::XLAOptimizationLevel::Standard,
            mixed_precision: true,
            batch_size_per_core: 32,
            enable_pod_coordination: false,
            pod_topology: PodTopology::Pod2x2,
            memory_optimization: crate::main_types::TPUMemoryOptimization::Balanced,
            gradient_compression: true,
            prefetch_depth: 2,
            experimental_features: false,
        };

        let backend_config = BackendConfig {
            target_tpu: tpu_config,
            enable_optimized_codegen: true,
            enable_profiling: true,
            debug_mode: false,
            verification_mode: false,
            custom_options: std::collections::HashMap::new(),
        };

        let profiling: ProfilingIntegration<f32> = ProfilingIntegration::new(&backend_config);
        assert_eq!(profiling.profiling_stats.samples_collected, 0);
        assert!(profiling.config.enable_perf_counters);
    }

    #[test]
    fn test_counter_manager_creation() {
        let counter_manager = PerformanceCounterManager::new();
        assert!(!counter_manager.available_counters.is_empty());
        assert!(counter_manager
            .available_counters
            .contains_key("matrix_ops"));
        assert!(counter_manager
            .available_counters
            .contains_key("memory_bandwidth"));
    }
}