package hashing

import (
	"RenewCMS/internal/domain/apikey"
	"crypto/rand"
	"crypto/sha256"
	"encoding/base64"
	"encoding/hex"
)

const (
	apiKeyRandomBytes = 32
	apiKeyPrefixLen   = 12
)

type SHA256KeyGenerator struct{}

func NewSHA256KeyGenerator() *SHA256KeyGenerator {
	return &SHA256KeyGenerator{}
}

func (g *SHA256KeyGenerator) Generate() (string, string, string) {
	random := make([]byte, apiKeyRandomBytes)
	_, _ = rand.Read(random)
	rawKey := apikey.RawKeyPrefix + base64.RawURLEncoding.EncodeToString(random)
	return rawKey, rawKey[:apiKeyPrefixLen], g.Hash(rawKey)
}

func (g *SHA256KeyGenerator) Hash(rawKey string) string {
	sum := sha256.Sum256([]byte(rawKey))
	return hex.EncodeToString(sum[:])
}

var _ apikey.KeyGenerator = &SHA256KeyGenerator{}