package service

import (
	"sync"
	"time"
)

const (
	cacheExpiration = 5 * time.Minute
)

type cache struct {
	mu         sync.RWMutex
	cache      map[string][]string
	expiration time.Duration
}

func (c *cache) Get(key string) (val []string) {
	c.mu.RLock()
	defer c.mu.RUnlock()
	return c.cache[key]
}

func (c *cache) Insert(key string, val []string) {
	c.mu.Lock()
	c.cache[key] = val
	c.mu.Unlock()
	go func() {
		time.Sleep(c.expiration)
		c.Delete(key)
	}()
}

func (c *cache) Delete(key string) {
	c.mu.Lock()
	defer c.mu.Unlock()
	delete(c.cache, key)
}