// Package stats tracks runtime statistics since server boot.
package stats

import (
	"sync/atomic"
)

// Tracker holds atomic counters for runtime statistics
// that accumulate since the server started.
type Tracker struct {
	connectionsSinceBoot atomic.Int64
	sessionsSinceBoot    atomic.Int64
	messagesSinceBoot    atomic.Int64
}

// New creates a new Tracker with all counters at zero.
func New() *Tracker {
	return &Tracker{} //nolint:exhaustruct // atomic fields have zero-value defaults
}

// IncrConnections increments the total connection count.
func (t *Tracker) IncrConnections() {
	t.connectionsSinceBoot.Add(1)
}

// IncrSessions increments the total session count.
func (t *Tracker) IncrSessions() {
	t.sessionsSinceBoot.Add(1)
}

// IncrMessages increments the total PRIVMSG/NOTICE count.
func (t *Tracker) IncrMessages() {
	t.messagesSinceBoot.Add(1)
}

// ConnectionsSinceBoot returns the total number of
// client connections since boot.
func (t *Tracker) ConnectionsSinceBoot() int64 {
	return t.connectionsSinceBoot.Load()
}

// SessionsSinceBoot returns the total number of sessions
// created since boot.
func (t *Tracker) SessionsSinceBoot() int64 {
	return t.sessionsSinceBoot.Load()
}

// MessagesSinceBoot returns the total number of
// PRIVMSG/NOTICE messages sent since boot.
func (t *Tracker) MessagesSinceBoot() int64 {
	return t.messagesSinceBoot.Load()
}