// Package manager provides filter and chain management for the MCP Filter SDK.
package manager

import (
	"sync/atomic"
	"time"
)

// ProcessorMonitor monitors processing metrics.
type ProcessorMonitor struct {
	requestRate      atomic.Int64
	latencySum       atomic.Int64
	latencyCount     atomic.Int64
	errorRate        atomic.Int64
	chainUtilization map[string]*ChainMetrics
	alertThresholds  AlertThresholds
}

// ChainMetrics tracks per-chain metrics.
type ChainMetrics struct {
	Invocations int64
	TotalTime   time.Duration
	Errors      int64
}

// AlertThresholds defines alert conditions.
type AlertThresholds struct {
	MaxLatency    time.Duration
	MaxErrorRate  float64
	MinThroughput float64
}

// RecordRequest records a request.
func (m *ProcessorMonitor) RecordRequest(chain string, latency time.Duration, success bool) {
	m.requestRate.Add(1)
	m.latencySum.Add(int64(latency))
	m.latencyCount.Add(1)

	if !success {
		m.errorRate.Add(1)
	}

	// Update chain metrics
	// m.chainUtilization[chain].Invocations++

	// Check thresholds
	m.checkAlerts(latency)
}

// checkAlerts checks for threshold violations.
func (m *ProcessorMonitor) checkAlerts(latency time.Duration) {
	if latency > m.alertThresholds.MaxLatency {
		// Generate alert
	}
}

// GetMetrics returns current metrics.
func (m *ProcessorMonitor) GetMetrics() map[string]interface{} {
	avgLatency := time.Duration(0)
	if count := m.latencyCount.Load(); count > 0 {
		avgLatency = time.Duration(m.latencySum.Load() / count)
	}

	return map[string]interface{}{
		"request_rate": m.requestRate.Load(),
		"avg_latency":  avgLatency,
		"error_rate":   m.errorRate.Load(),
	}
}
