import crypto from 'crypto'

export const encrypt = (string = '', key = 'AnyKey', buffer = '1234567891011121') => {
    if (typeof string !== 'string') throw new Error('String must be a string')
    if (typeof key !== 'string') throw new Error('Key must be a string')
    if (buffer?.length !== 16) throw new Error('Buffer must be 16 characters long')
    const cipher = crypto.createCipheriv('aes-256-ctr', key, buffer);
    const encrypted = Buffer.concat([cipher.update(string), cipher.final()]);
    return encrypted.toString('hex')
}
export const decrypt = (string = '', key = 'AnyKey', buffer = '1234567891011121') => {
    if (typeof string !== 'string') throw new Error('String must be a string')
    if (typeof key !== 'string') throw new Error('Key must be a string')
    if (buffer?.length !== 16) throw new Error('Buffer must be 16 characters long')
    const decipher = crypto.createDecipheriv('aes-256-ctr', key, buffer);
    const decrpyted = Buffer.concat([decipher.update(Buffer.from(string, 'hex')), decipher.final()]);
    return decrpyted.toString();
}

export const randomString = (length = 32) => {
    return Array(length).fill('').map(() => crypto.randomInt(0,9)).join('')
}

export default { encrypt, decrypt, randomString }