const crypto = require('crypto');
require('dotenv').config();

const ALGORITHM = 'aes-256-cbc';
const KEY = crypto.createHash('sha256').update(process.env.CRYPT_KEY).digest();
const IV = Buffer.alloc(16, 0); // Python의 chr(0) * 16 과 동일

class AESCipher {
    static encrypt(text) {
        const cipher = crypto.createCipheriv(ALGORITHM, KEY, IV);
        let encrypted = cipher.update(text, 'utf8', 'base64');
        encrypted += cipher.final('base64');
        return encrypted;
    }

    static decrypt(encryptedText) {
        try {
            const decipher = crypto.createDecipheriv(ALGORITHM, KEY, IV);
            let decrypted = decipher.update(encryptedText, 'base64', 'utf8');
            decrypted += decipher.final('utf8');
            return decrypted;
        } catch (error) {
            console.error("복호화 실패:", error.message);
            return null; // 또는 오류 처리
        }
    }
}

module.exports = AESCipher;