import { hash, verify } from "@felix/bcrypt";

const DEFAULT_PASSWORD_LENGTH = 32;

class Password {
    public generate(length: number = DEFAULT_PASSWORD_LENGTH): string {
        return generateRandomString(length);
    }

    public async hash(password: string) {
        return await hash(password);
    }

    public async verify(password: string, hash: string) {
        return await verify(password, hash);
    }
}

export const passwd = new Password();

export const generateRandomString = (length: number): string => {
    const charset =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    const charsetLength = charset.length;
    const randomValues = new Uint8Array(length);
    crypto.getRandomValues(randomValues);

    let result = "";
    for (let i = 0; i < length; i++) {
        result += charset[randomValues[i] % charsetLength];
    }
    return result;
};