"errors"
	"fmt"
	"sync"
)

// ErrBatchFull indicates that the batch is full
var ErrBatchFull = errors.New("batch is full")

type key interface {
	string | int | int64
}

// Batch represents an ordered batch
type Batch[K key, T any] struct {
	keys  []K
	items map[K]T
	limit uint32

	sync.Mutex
}

// Add adds the item to the batch
func (b *Batch[K, T]) Add(key K, item T) error {
	b.Lock()