package storage

import (
	"fmt"
	"hash/fnv"
	"strconv"
	"strings"
)

// generateKey creates a unique Redis key for an entity
func GenerateKey(pattern, uuid string) string {
	return fmt.Sprintf("%s:%s", pattern, uuid)
}

func GenerateIndexKey(key string) string {
	shardID := getSharedId(key)
	return RedisIndexKeyPrefix + strconv.FormatUint(uint64(shardID), 10)
}

func ParseKey(key string) (string, string) {
	parts := strings.Split(key, ":")
	if len(parts) != 2 {
		return "", ""
	}
	return parts[0], parts[1]
}

func GenQueueKey(key string) string {
	shardID := getSharedId(key)
	return RedisListKeyPrefix + strconv.FormatUint(uint64(shardID), 10)
}

func GenQueueKeyByShardId(shardID uint32) string {
	return RedisListKeyPrefix + strconv.FormatUint(uint64(shardID), 10)
}

func getSharedId(key string) uint32 {
	h := fnv.New32a()
	h.Write([]byte(key))
	return h.Sum32() % RedisListShardCount
}