// Package realtimedata define real time data operation functions
package realtimedata

import (
	"sync"
	"time"
)

// CacheItem define structure for caching real time data with calculation capabilities
type CacheItem struct {
	key            string
	value          []any
	CalculatorFunc any
	LastAccessed   time.Time
}

// Reset defines a method to reset the CacheItem to its zero state
func (ci *CacheItem) Reset() {
	ci.key = ""
	ci.value = nil
	ci.CalculatorFunc = nil
	ci.LastAccessed = time.Time{}
}

// IsExpired defines a method to check if the cache item has expired based on a given TTL
func (ci *CacheItem) IsExpired(ttl time.Duration) bool {
	return time.Since(ci.LastAccessed) > ttl
}

// CachePool define sync.Pool for cache item objects to optimize memory usage and reduce allocations
var CachePool = sync.Pool{
	New: func() any {
		return &CacheItem{}
	},
}

// GetCacheItem define a method to get a cache item from the pool
func GetCacheItem() *CacheItem {
	item := CachePool.Get().(*CacheItem)
	item.Reset()
	return item
}

// PutCacheItem define a method to put a cache item back to the pool
func PutCacheItem(item *CacheItem) {
	item.Reset()
	CachePool.Put(item)
}