package mysql

import (
	"time"
)

// Storage interface that is implemented by storage providers
type Storage struct {
	gcInterval time.Duration
}

// New creates a new storage
func New(config ...Config) *Storage {
	// Set default config
	cfg := ConfigDefault

	// Override config if provided
	if len(config) > 0 {
		cfg = configDefault(config[0])
	}

	// Create storage
	store := &Storage{
		gcInterval: cfg.GCInterval,
	}

	// Start garbage collector
	go store.gc()

	return store
}

// Get value by key
func (s *Storage) Get(key string) ([]byte, error) {
	return nil, nil
}

// Set key with value
func (s *Storage) Set(key string, val []byte, exp time.Duration) error {
	return nil
}

// Delete key by key
func (s *Storage) Delete(key string) error {
	return nil
}

// Clear all keys
func (s *Storage) Clear() error {
	return nil
}

// Garbage collector to delete expired keys
func (s *Storage) gc() {
	tick := time.NewTicker(s.gcInterval)
	for {
		<-tick.C
		// clean entries
	}
}