reasonkit-core 0.1.8

//! # Performance Tracking System
//!
//! This module provides comprehensive performance monitoring for long-horizon operations,
//! tracking tool calls, resource usage, and optimization opportunities across 100+ tool calling sequences.

use std::collections::{HashMap, VecDeque};
use std::sync::Arc;
use tokio::sync::Mutex;

use crate::error::Error;

/// Real-time performance tracker for long-horizon operations
pub struct PerformanceTracker {
    /// Real-time metrics collector
    real_time_metrics: Arc<Mutex<RealTimeMetrics>>,
    /// Performance history for analysis
    performance_history: Arc<Mutex<VecDeque<PerformanceRecord>>>,
    /// Resource utilization tracker
    resource_tracker: Arc<Mutex<ResourceUtilizationTracker>>,
    /// Optimization analyzer
    optimizer: Arc<Mutex<PerformanceOptimizer>>,
    /// Configuration
    config: PerformanceTrackerConfig,
}

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

impl PerformanceTracker {
    pub fn new() -> Self {
        Self {
            real_time_metrics: Arc::new(Mutex::new(RealTimeMetrics::new())),
            performance_history: Arc::new(Mutex::new(VecDeque::new())),
            resource_tracker: Arc::new(Mutex::new(ResourceUtilizationTracker::new())),
            optimizer: Arc::new(Mutex::new(PerformanceOptimizer::new())),
            config: PerformanceTrackerConfig::default(),
        }
    }

    /// Record a tool call with performance metrics
    pub async fn record_tool_call(
        &self,
        tool_call_id: u32,
        duration_ms: u64,
        cost: f64,
    ) -> Result<(), Error> {
        let timestamp = chrono::Utc::now();

        // Update real-time metrics
        {
            let mut metrics = self.real_time_metrics.lock().await;
            metrics.record_tool_call(tool_call_id, duration_ms, cost, timestamp);
        }

        // Update resource utilization
        {
            let mut tracker = self.resource_tracker.lock().await;
            tracker.record_tool_call(duration_ms).await;
        }

        // Analyze performance for optimization opportunities
        {
            let mut optimizer = self.optimizer.lock().await;
            optimizer
                .analyze_tool_call(tool_call_id, duration_ms, cost)
                .await;
        }

        tracing::debug!(
            "Recorded tool call {}: {}ms, ${:.4}",
            tool_call_id,
            duration_ms,
            cost
        );

        Ok(())
    }

    /// Record execution of a complex operation
    pub async fn record_operation(
        &self,
        operation_name: &str,
        tool_calls_used: u32,
        duration_ms: u64,
        success: bool,
        metadata: serde_json::Value,
    ) -> Result<(), Error> {
        let timestamp = chrono::Utc::now();
        let record = PerformanceRecord {
            id: format!("op_{}_{}", operation_name, timestamp.timestamp()),
            operation_name: operation_name.to_string(),
            timestamp,
            tool_calls_used,
            duration_ms,
            success,
            metadata,
        };

        // Add to history
        {
            let mut history = self.performance_history.lock().await;
            history.push_back(record.clone());

            // Maintain history limit
            if history.len() > self.config.max_history_records {
                history.pop_front();
            }
        }

        // Update real-time metrics
        {
            let mut metrics = self.real_time_metrics.lock().await;
            metrics.record_operation(&record);
        }

        // Analyze operation performance
        {
            let mut optimizer = self.optimizer.lock().await;
            optimizer.analyze_operation(&record).await;
        }

        tracing::info!(
            "Recorded operation '{}': {} tool calls, {}ms, success: {}",
            operation_name,
            tool_calls_used,
            duration_ms,
            success
        );

        Ok(())
    }

    /// Get current real-time metrics
    pub async fn get_real_time_metrics(&self) -> Result<RealTimeMetrics, Error> {
        let metrics = self.real_time_metrics.lock().await;
        Ok(metrics.clone())
    }

    /// Get performance summary for a time window
    pub async fn get_performance_summary(
        &self,
        window_duration: chrono::Duration,
    ) -> Result<PerformanceSummary, Error> {
        let now = chrono::Utc::now();
        let cutoff = now - window_duration;

        let history = self.performance_history.lock().await;
        let recent_records: Vec<_> = history
            .iter()
            .filter(|record| record.timestamp >= cutoff)
            .cloned()
            .collect();

        if recent_records.is_empty() {
            return Ok(PerformanceSummary::empty());
        }

        let total_tool_calls: u32 = recent_records.iter().map(|r| r.tool_calls_used).sum();
        let total_duration_ms: u64 = recent_records.iter().map(|r| r.duration_ms).sum();
        let success_count = recent_records.iter().filter(|r| r.success).count();
        let total_records = recent_records.len();

        let avg_tool_calls_per_operation = total_tool_calls as f64 / total_records as f64;
        let avg_duration_per_operation = total_duration_ms as f64 / total_records as f64;
        let success_rate = success_count as f64 / total_records as f64;

        // Calculate throughput (operations per minute)
        let minutes = window_duration.num_minutes() as f64;
        let throughput_per_minute = if minutes > 0.0 {
            total_records as f64 / minutes
        } else {
            0.0
        };

        // Calculate efficiency score
        let efficiency_score = self.calculate_efficiency_score(&recent_records);

        // Identify performance bottlenecks
        let bottlenecks = self.identify_bottlenecks(&recent_records).await;

        Ok(PerformanceSummary {
            time_window: window_duration,
            total_operations: total_records,
            total_tool_calls,
            total_duration_ms,
            avg_tool_calls_per_operation,
            avg_duration_per_operation,
            success_rate,
            throughput_per_minute,
            efficiency_score,
            bottlenecks,
            top_performing_operations: self.get_top_performing_operations(&recent_records),
            recommendations: self
                .generate_optimization_recommendations(&recent_records)
                .await,
        })
    }

    /// Get resource utilization statistics
    pub async fn get_resource_utilization(&self) -> Result<ResourceUtilization, Error> {
        let tracker = self.resource_tracker.lock().await;
        Ok(tracker.get_utilization_stats())
    }

    /// Get optimization recommendations
    pub async fn get_optimization_recommendations(
        &self,
    ) -> Result<Vec<OptimizationRecommendation>, Error> {
        let optimizer = self.optimizer.lock().await;
        Ok(optimizer.get_recommendations().await)
    }

    /// Reset performance tracking
    pub async fn reset(&self) -> Result<(), Error> {
        {
            let mut metrics = self.real_time_metrics.lock().await;
            metrics.reset();
        }

        {
            let mut history = self.performance_history.lock().await;
            history.clear();
        }

        {
            let mut tracker = self.resource_tracker.lock().await;
            tracker.reset();
        }

        {
            let mut optimizer = self.optimizer.lock().await;
            optimizer.reset();
        }

        tracing::info!("Performance tracker reset");
        Ok(())
    }

    /// Calculate efficiency score based on multiple factors
    fn calculate_efficiency_score(&self, records: &[PerformanceRecord]) -> f64 {
        if records.is_empty() {
            return 1.0;
        }

        let success_rate =
            records.iter().filter(|r| r.success).count() as f64 / records.len() as f64;

        // Calculate average tool calls efficiency
        let avg_tool_calls =
            records.iter().map(|r| r.tool_calls_used).sum::<u32>() as f64 / records.len() as f64;
        let tool_call_efficiency = (avg_tool_calls / 100.0).min(1.0); // Normalize to 100 tool calls

        // Calculate time efficiency
        let avg_duration =
            records.iter().map(|r| r.duration_ms).sum::<u64>() as f64 / records.len() as f64;
        let time_efficiency = (60000.0 / avg_duration).min(1.0); // Normalize to 1 minute per operation

        // Weighted combination
        (success_rate * 0.4 + tool_call_efficiency * 0.3 + time_efficiency * 0.3).clamp(0.0, 1.0)
    }

    /// Identify performance bottlenecks
    async fn identify_bottlenecks(
        &self,
        records: &[PerformanceRecord],
    ) -> Vec<PerformanceBottleneck> {
        let mut bottlenecks = Vec::new();

        // Analyze operation durations
        let avg_duration =
            records.iter().map(|r| r.duration_ms).sum::<u64>() as f64 / records.len() as f64;
        let slow_operations: Vec<_> = records
            .iter()
            .filter(|r| r.duration_ms as f64 > avg_duration * 2.0)
            .collect();

        if !slow_operations.is_empty() {
            bottlenecks.push(PerformanceBottleneck {
                type_: BottleneckType::SlowOperations,
                severity: if slow_operations.len() as f64 / records.len() as f64 > 0.3 {
                    BottleneckSeverity::High
                } else {
                    BottleneckSeverity::Medium
                },
                description: format!(
                    "{} operations are taking longer than average ({}ms avg)",
                    slow_operations.len(),
                    avg_duration as u64
                ),
                affected_operations: slow_operations
                    .iter()
                    .map(|r| r.operation_name.clone())
                    .collect(),
            });
        }

        // Analyze tool call counts
        let avg_tool_calls =
            records.iter().map(|r| r.tool_calls_used).sum::<u32>() as f64 / records.len() as f64;
        let high_tool_call_ops: Vec<_> = records
            .iter()
            .filter(|r| r.tool_calls_used as f64 > avg_tool_calls * 2.0)
            .collect();

        if !high_tool_call_ops.is_empty() {
            bottlenecks.push(PerformanceBottleneck {
                type_: BottleneckType::ExcessiveToolCalls,
                severity: if high_tool_call_ops.len() as f64 / records.len() as f64 > 0.2 {
                    BottleneckSeverity::High
                } else {
                    BottleneckSeverity::Low
                },
                description: format!(
                    "{} operations use excessive tool calls ({} avg)",
                    high_tool_call_ops.len(),
                    avg_tool_calls
                ),
                affected_operations: high_tool_call_ops
                    .iter()
                    .map(|r| r.operation_name.clone())
                    .collect(),
            });
        }

        // Analyze failure rates
        let failure_rate =
            records.iter().filter(|r| !r.success).count() as f64 / records.len() as f64;
        if failure_rate > 0.1 {
            bottlenecks.push(PerformanceBottleneck {
                type_: BottleneckType::HighFailureRate,
                severity: if failure_rate > 0.3 {
                    BottleneckSeverity::Critical
                } else {
                    BottleneckSeverity::High
                },
                description: format!("High failure rate: {:.1}%", failure_rate * 100.0),
                affected_operations: records
                    .iter()
                    .filter(|r| !r.success)
                    .map(|r| r.operation_name.clone())
                    .collect(),
            });
        }

        bottlenecks
    }

    /// Get top performing operations
    fn get_top_performing_operations(
        &self,
        records: &[PerformanceRecord],
    ) -> Vec<OperationPerformance> {
        let mut operations: HashMap<String, Vec<&PerformanceRecord>> = HashMap::new();

        // Group records by operation name
        for record in records {
            operations
                .entry(record.operation_name.clone())
                .or_default()
                .push(record);
        }

        // Calculate performance metrics for each operation
        let mut performance_data = Vec::new();
        for (op_name, op_records) in operations {
            let total_calls: u32 = op_records.iter().map(|r| r.tool_calls_used).sum();
            let total_duration: u64 = op_records.iter().map(|r| r.duration_ms).sum();
            let success_count = op_records.iter().filter(|r| r.success).count();
            let total_ops = op_records.len();

            performance_data.push(OperationPerformance {
                operation_name: op_name,
                total_executions: total_ops,
                avg_tool_calls: total_calls as f64 / total_ops as f64,
                avg_duration_ms: total_duration as f64 / total_ops as f64,
                success_rate: success_count as f64 / total_ops as f64,
                efficiency_score: self.calculate_operation_efficiency(&op_records),
            });
        }

        // Sort by efficiency score and return top 5
        performance_data
            .sort_by(|a, b| b.efficiency_score.partial_cmp(&a.efficiency_score).unwrap());
        performance_data.into_iter().take(5).collect()
    }

    /// Calculate efficiency score for a specific operation
    fn calculate_operation_efficiency(&self, records: &[&PerformanceRecord]) -> f64 {
        if records.is_empty() {
            return 0.0;
        }

        let success_rate =
            records.iter().filter(|r| r.success).count() as f64 / records.len() as f64;
        let avg_duration =
            records.iter().map(|r| r.duration_ms).sum::<u64>() as f64 / records.len() as f64;
        let avg_tool_calls =
            records.iter().map(|r| r.tool_calls_used).sum::<u32>() as f64 / records.len() as f64;

        // Efficiency is inverse of duration and tool calls, weighted by success rate
        let duration_score = (10000.0 / avg_duration).min(1.0);
        let tool_call_score = (50.0 / avg_tool_calls).min(1.0);

        success_rate * 0.5 + duration_score * 0.3 + tool_call_score * 0.2
    }

    /// Generate optimization recommendations
    async fn generate_optimization_recommendations(
        &self,
        records: &[PerformanceRecord],
    ) -> Vec<OptimizationRecommendation> {
        let mut recommendations = Vec::new();

        // Analyze patterns and generate recommendations
        let avg_duration =
            records.iter().map(|r| r.duration_ms).sum::<u64>() as f64 / records.len() as f64;
        let avg_tool_calls =
            records.iter().map(|r| r.tool_calls_used).sum::<u32>() as f64 / records.len() as f64;

        if avg_duration > 30000.0 {
            recommendations.push(OptimizationRecommendation {
                priority: RecommendationPriority::High,
                category: RecommendationCategory::Performance,
                title: "Optimize Operation Duration".to_string(),
                description: format!(
                    "Average operation duration is {:.1} seconds. Consider optimizing algorithms or parallelizing operations.",
                    avg_duration / 1000.0
                ),
                estimated_impact: ImpactLevel::High,
                implementation_effort: ImplementationEffort::Medium,
            });
        }

        if avg_tool_calls > 50.0 {
            recommendations.push(OptimizationRecommendation {
                priority: RecommendationPriority::Medium,
                category: RecommendationCategory::ToolEfficiency,
                title: "Reduce Tool Call Count".to_string(),
                description: format!(
                    "Average tool calls per operation is {:.1}. Consider batching operations or caching results.",
                    avg_tool_calls
                ),
                estimated_impact: ImpactLevel::Medium,
                implementation_effort: ImplementationEffort::Low,
            });
        }

        // Check for consistent patterns that could benefit from caching
        let operation_counts: HashMap<String, usize> = records
            .iter()
            .map(|r| (r.operation_name.clone(), 1))
            .fold(HashMap::new(), |mut acc, (name, count)| {
                *acc.entry(name).or_insert(0) += count;
                acc
            });

        let frequently_used_ops: Vec<_> = operation_counts
            .iter()
            .filter(|(_, count)| **count >= 5)
            .map(|(name, _)| name)
            .collect();

        if !frequently_used_ops.is_empty() {
            recommendations.push(OptimizationRecommendation {
                priority: RecommendationPriority::Medium,
                category: RecommendationCategory::Caching,
                title: "Implement Result Caching".to_string(),
                description: format!(
                    "Operations {} are executed frequently. Consider implementing result caching to improve performance.",
                    frequently_used_ops.iter().map(|s| s.as_str()).collect::<Vec<_>>().join(", ")
                ),
                estimated_impact: ImpactLevel::High,
                implementation_effort: ImplementationEffort::Low,
            });
        }

        recommendations
    }
}

/// Real-time performance metrics
#[derive(Debug, Clone)]
pub struct RealTimeMetrics {
    pub current_tool_call_id: u32,
    pub total_tool_calls_today: u32,
    pub avg_duration_ms: f64,
    pub avg_cost_per_call: f64,
    pub current_throughput_per_minute: f64,
    pub error_rate: f64,
    pub last_update: chrono::DateTime<chrono::Utc>,
    pub rolling_window: VecDeque<PerformanceSample>,
}

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

impl RealTimeMetrics {
    pub fn new() -> Self {
        Self {
            current_tool_call_id: 0,
            total_tool_calls_today: 0,
            avg_duration_ms: 0.0,
            avg_cost_per_call: 0.0,
            current_throughput_per_minute: 0.0,
            error_rate: 0.0,
            last_update: chrono::Utc::now(),
            rolling_window: VecDeque::new(),
        }
    }

    pub fn record_tool_call(
        &mut self,
        tool_call_id: u32,
        duration_ms: u64,
        cost: f64,
        timestamp: chrono::DateTime<chrono::Utc>,
    ) {
        self.current_tool_call_id = tool_call_id;
        self.total_tool_calls_today += 1;
        self.last_update = timestamp;

        // Add to rolling window (last 100 calls)
        let sample = PerformanceSample {
            timestamp,
            duration_ms,
            cost,
            success: true, // Would be determined by actual execution
        };

        self.rolling_window.push_back(sample);
        if self.rolling_window.len() > 100 {
            self.rolling_window.pop_front();
        }

        // Update averages
        let total_samples = self.rolling_window.len() as f64;
        self.avg_duration_ms = self
            .rolling_window
            .iter()
            .map(|s| s.duration_ms as f64)
            .sum::<f64>()
            / total_samples;

        self.avg_cost_per_call =
            self.rolling_window.iter().map(|s| s.cost).sum::<f64>() / total_samples;

        // Calculate throughput (calls per minute in rolling window)
        if let (Some(first), Some(last)) = (self.rolling_window.front(), self.rolling_window.back())
        {
            let time_span = (last.timestamp - first.timestamp).num_seconds() as f64;
            if time_span > 0.0 {
                self.current_throughput_per_minute = (total_samples * 60.0) / time_span;
            }
        }
    }

    pub fn record_operation(&mut self, record: &PerformanceRecord) {
        // Update error rate based on success
        let total_ops = self.rolling_window.len() as f64 + 1.0;
        let successful_ops = self.rolling_window.iter().filter(|s| s.success).count() as f64
            + if record.success { 1.0 } else { 0.0 };
        self.error_rate = 1.0 - (successful_ops / total_ops);
    }

    pub fn reset(&mut self) {
        self.current_tool_call_id = 0;
        self.total_tool_calls_today = 0;
        self.avg_duration_ms = 0.0;
        self.avg_cost_per_call = 0.0;
        self.current_throughput_per_minute = 0.0;
        self.error_rate = 0.0;
        self.rolling_window.clear();
    }
}

/// Performance sample for rolling window
#[derive(Debug, Clone)]
pub struct PerformanceSample {
    timestamp: chrono::DateTime<chrono::Utc>,
    duration_ms: u64,
    cost: f64,
    success: bool,
}

/// Resource utilization tracker
#[derive(Debug)]
struct ResourceUtilizationTracker {
    memory_usage_mb: VecDeque<f64>,
    cpu_usage_percent: VecDeque<f64>,
    network_io_mb: VecDeque<f64>,
    disk_io_mb: VecDeque<f64>,
    peak_memory_mb: f64,
    peak_cpu_percent: f64,
}

impl ResourceUtilizationTracker {
    fn new() -> Self {
        Self {
            memory_usage_mb: VecDeque::new(),
            cpu_usage_percent: VecDeque::new(),
            network_io_mb: VecDeque::new(),
            disk_io_mb: VecDeque::new(),
            peak_memory_mb: 0.0,
            peak_cpu_percent: 0.0,
        }
    }

    async fn record_tool_call(&mut self, duration_ms: u64) {
        // Simulate resource usage (in real implementation, would get actual system metrics)
        let simulated_memory = 100.0 + (duration_ms as f64 / 1000.0) * 10.0;
        let simulated_cpu = 10.0 + (duration_ms as f64 / 1000.0) * 5.0;
        let simulated_network = duration_ms as f64 / 1000.0 * 2.0;
        let simulated_disk = duration_ms as f64 / 1000.0 * 1.0;

        self.memory_usage_mb.push_back(simulated_memory);
        self.cpu_usage_percent.push_back(simulated_cpu);
        self.network_io_mb.push_back(simulated_network);
        self.disk_io_mb.push_back(simulated_disk);

        // Maintain rolling window
        let max_samples = 50;
        if self.memory_usage_mb.len() > max_samples {
            self.memory_usage_mb.pop_front();
            self.cpu_usage_percent.pop_front();
            self.network_io_mb.pop_front();
            self.disk_io_mb.pop_front();
        }

        // Update peaks
        self.peak_memory_mb = self.peak_memory_mb.max(simulated_memory);
        self.peak_cpu_percent = self.peak_cpu_percent.max(simulated_cpu);
    }

    fn get_utilization_stats(&self) -> ResourceUtilization {
        let avg_memory = if !self.memory_usage_mb.is_empty() {
            self.memory_usage_mb.iter().sum::<f64>() / self.memory_usage_mb.len() as f64
        } else {
            0.0
        };

        let avg_cpu = if !self.cpu_usage_percent.is_empty() {
            self.cpu_usage_percent.iter().sum::<f64>() / self.cpu_usage_percent.len() as f64
        } else {
            0.0
        };

        let avg_network = if !self.network_io_mb.is_empty() {
            self.network_io_mb.iter().sum::<f64>() / self.network_io_mb.len() as f64
        } else {
            0.0
        };

        let avg_disk = if !self.disk_io_mb.is_empty() {
            self.disk_io_mb.iter().sum::<f64>() / self.disk_io_mb.len() as f64
        } else {
            0.0
        };

        ResourceUtilization {
            avg_memory_usage_mb: avg_memory,
            peak_memory_usage_mb: self.peak_memory_mb,
            avg_cpu_usage_percent: avg_cpu,
            peak_cpu_usage_percent: self.peak_cpu_percent,
            avg_network_io_mb_per_call: avg_network,
            avg_disk_io_mb_per_call: avg_disk,
            memory_efficiency: if self.peak_memory_mb > 0.0 {
                avg_memory / self.peak_memory_mb
            } else {
                1.0
            },
        }
    }

    fn reset(&mut self) {
        self.memory_usage_mb.clear();
        self.cpu_usage_percent.clear();
        self.network_io_mb.clear();
        self.disk_io_mb.clear();
        self.peak_memory_mb = 0.0;
        self.peak_cpu_percent = 0.0;
    }
}

/// Performance optimizer for identifying improvements
#[derive(Debug)]
struct PerformanceOptimizer {
    analysis_cache: HashMap<String, PerformanceAnalysis>,
    optimization_history: VecDeque<OptimizationAction>,
}

impl PerformanceOptimizer {
    fn new() -> Self {
        Self {
            analysis_cache: HashMap::new(),
            optimization_history: VecDeque::new(),
        }
    }

    async fn analyze_tool_call(&mut self, _tool_call_id: u32, duration_ms: u64, cost: f64) {
        // Analyze individual tool call for patterns
        if duration_ms > 10_000 {
            // 10 seconds
            tracing::warn!("Slow tool call detected: {}ms", duration_ms);
        }

        if cost > 0.01 {
            // $0.01
            tracing::info!("High-cost tool call: ${:.4}", cost);
        }
    }

    async fn analyze_operation(&mut self, record: &PerformanceRecord) {
        // Analyze operation patterns
        let analysis_key = format!(
            "{}_{}",
            record.operation_name,
            record.timestamp.date_naive()
        );

        let analysis = PerformanceAnalysis {
            operation_name: record.operation_name.clone(),
            avg_duration_ms: record.duration_ms as f64,
            avg_tool_calls: record.tool_calls_used as f64,
            success_rate: if record.success { 1.0 } else { 0.0 },
            last_analysis: chrono::Utc::now(),
        };

        self.analysis_cache.insert(analysis_key, analysis);
    }

    async fn get_recommendations(&self) -> Vec<OptimizationRecommendation> {
        // Generate recommendations based on analysis cache
        let mut recommendations = Vec::new();

        for analysis in self.analysis_cache.values() {
            if analysis.avg_duration_ms > 30000.0 {
                recommendations.push(OptimizationRecommendation {
                    priority: RecommendationPriority::High,
                    category: RecommendationCategory::Performance,
                    title: format!("Optimize {} duration", analysis.operation_name),
                    description: format!(
                        "Operation '{}' averages {:.1} seconds. Consider optimization.",
                        analysis.operation_name,
                        analysis.avg_duration_ms / 1000.0
                    ),
                    estimated_impact: ImpactLevel::High,
                    implementation_effort: ImplementationEffort::Medium,
                });
            }

            if analysis.avg_tool_calls > 30.0 {
                recommendations.push(OptimizationRecommendation {
                    priority: RecommendationPriority::Medium,
                    category: RecommendationCategory::ToolEfficiency,
                    title: format!("Reduce {} tool calls", analysis.operation_name),
                    description: format!(
                        "Operation '{}' uses {:.1} tool calls on average.",
                        analysis.operation_name, analysis.avg_tool_calls
                    ),
                    estimated_impact: ImpactLevel::Medium,
                    implementation_effort: ImplementationEffort::Low,
                });
            }
        }

        recommendations
    }

    fn reset(&mut self) {
        self.analysis_cache.clear();
        self.optimization_history.clear();
    }
}

/// Performance record for history tracking
#[derive(Debug, Clone)]
pub struct PerformanceRecord {
    pub id: String,
    pub operation_name: String,
    pub timestamp: chrono::DateTime<chrono::Utc>,
    pub tool_calls_used: u32,
    pub duration_ms: u64,
    pub success: bool,
    pub metadata: serde_json::Value,
}

/// Performance analysis
#[derive(Debug, Clone)]
#[allow(dead_code)]
struct PerformanceAnalysis {
    operation_name: String,
    avg_duration_ms: f64,
    avg_tool_calls: f64,
    success_rate: f64,
    last_analysis: chrono::DateTime<chrono::Utc>,
}

/// Performance summary
#[derive(Debug, Clone)]
pub struct PerformanceSummary {
    pub time_window: chrono::Duration,
    pub total_operations: usize,
    pub total_tool_calls: u32,
    pub total_duration_ms: u64,
    pub avg_tool_calls_per_operation: f64,
    pub avg_duration_per_operation: f64,
    pub success_rate: f64,
    pub throughput_per_minute: f64,
    pub efficiency_score: f64,
    pub bottlenecks: Vec<PerformanceBottleneck>,
    pub top_performing_operations: Vec<OperationPerformance>,
    pub recommendations: Vec<OptimizationRecommendation>,
}

impl PerformanceSummary {
    pub fn empty() -> Self {
        Self {
            time_window: chrono::Duration::minutes(0),
            total_operations: 0,
            total_tool_calls: 0,
            total_duration_ms: 0,
            avg_tool_calls_per_operation: 0.0,
            avg_duration_per_operation: 0.0,
            success_rate: 1.0,
            throughput_per_minute: 0.0,
            efficiency_score: 1.0,
            bottlenecks: Vec::new(),
            top_performing_operations: Vec::new(),
            recommendations: Vec::new(),
        }
    }
}

/// Performance bottleneck
#[derive(Debug, Clone)]
pub struct PerformanceBottleneck {
    pub type_: BottleneckType,
    pub severity: BottleneckSeverity,
    pub description: String,
    pub affected_operations: Vec<String>,
}

#[derive(Debug, Clone, PartialEq)]
pub enum BottleneckType {
    SlowOperations,
    ExcessiveToolCalls,
    HighFailureRate,
    ResourceContention,
    NetworkLatency,
}

#[derive(Debug, Clone, PartialEq)]
pub enum BottleneckSeverity {
    Low,
    Medium,
    High,
    Critical,
}

/// Operation performance metrics
#[derive(Debug, Clone)]
pub struct OperationPerformance {
    pub operation_name: String,
    pub total_executions: usize,
    pub avg_tool_calls: f64,
    pub avg_duration_ms: f64,
    pub success_rate: f64,
    pub efficiency_score: f64,
}

/// Optimization recommendation
#[derive(Debug, Clone)]
pub struct OptimizationRecommendation {
    pub priority: RecommendationPriority,
    pub category: RecommendationCategory,
    pub title: String,
    pub description: String,
    pub estimated_impact: ImpactLevel,
    pub implementation_effort: ImplementationEffort,
}

#[derive(Debug, Clone, PartialEq)]
pub enum RecommendationPriority {
    Low,
    Medium,
    High,
    Critical,
}

#[derive(Debug, Clone, PartialEq)]
pub enum RecommendationCategory {
    Performance,
    ToolEfficiency,
    Caching,
    ResourceManagement,
    ErrorHandling,
}

#[derive(Debug, Clone, PartialEq)]
pub enum ImpactLevel {
    Low,
    Medium,
    High,
    VeryHigh,
}

#[derive(Debug, Clone, PartialEq)]
pub enum ImplementationEffort {
    Low,
    Medium,
    High,
}

/// Resource utilization statistics
#[derive(Debug, Clone)]
pub struct ResourceUtilization {
    pub avg_memory_usage_mb: f64,
    pub peak_memory_usage_mb: f64,
    pub avg_cpu_usage_percent: f64,
    pub peak_cpu_usage_percent: f64,
    pub avg_network_io_mb_per_call: f64,
    pub avg_disk_io_mb_per_call: f64,
    pub memory_efficiency: f64,
}

/// Optimization action
#[derive(Debug, Clone)]
#[allow(dead_code)]
struct OptimizationAction {
    timestamp: chrono::DateTime<chrono::Utc>,
    action_type: String,
    target: String,
    expected_improvement: f64,
    actual_improvement: Option<f64>,
}

/// Configuration for performance tracker
#[derive(Debug, Clone)]
pub struct PerformanceTrackerConfig {
    pub max_history_records: usize,
    pub rolling_window_size: usize,
    pub enable_real_time_monitoring: bool,
    pub enable_resource_tracking: bool,
    pub enable_optimization: bool,
    pub analysis_interval_minutes: u32,
}

impl Default for PerformanceTrackerConfig {
    fn default() -> Self {
        Self {
            max_history_records: 10000,
            rolling_window_size: 100,
            enable_real_time_monitoring: true,
            enable_resource_tracking: true,
            enable_optimization: true,
            analysis_interval_minutes: 5,
        }
    }
}

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

    #[tokio::test]
    async fn test_performance_tracker_creation() {
        let tracker = PerformanceTracker::new();
        assert!(tracker.record_tool_call(1, 1000, 0.001).await.is_ok());
    }

    #[tokio::test]
    async fn test_real_time_metrics() {
        let mut metrics = RealTimeMetrics::new();
        metrics.record_tool_call(1, 2000, 0.002, chrono::Utc::now());

        assert_eq!(metrics.total_tool_calls_today, 1);
        assert_eq!(metrics.avg_duration_ms, 2000.0);
    }

    #[tokio::test]
    async fn test_performance_summary() {
        let tracker = PerformanceTracker::new();

        let _record = PerformanceRecord {
            id: "test1".to_string(),
            operation_name: "test_op".to_string(),
            timestamp: chrono::Utc::now(),
            tool_calls_used: 10,
            duration_ms: 5000,
            success: true,
            metadata: serde_json::json!({}),
        };

        assert!(tracker
            .record_operation("test_op", 10, 5000, true, serde_json::json!({}))
            .await
            .is_ok());
    }
}