import svgCaptcha from "svg-captcha";
import { captchaCreate } from "./store";
import { env } from "env";

/** 易混淆字符已剔除，长度 5 */
const CHAR_PRESET = "abcdefghjkmnpqrstuvwxyz23456789";

export function createCaptchaChallenge(): { captchaId: string; imageSvg: string } {
    if (env.E2E_TEST_MODE === "true" && env.E2E_FIXED_CAPTCHA) {
        const { captchaId } = captchaCreate(env.E2E_FIXED_CAPTCHA);
        return { captchaId, imageSvg: "<svg><!-- e2e fixed captcha --></svg>" };
    }

    const { data: imageSvg, text } = svgCaptcha.create({
        size: 5,
        noise: 2,
        color: true,
        charPreset: CHAR_PRESET,
        background: "#f4f4f5",
    });
    const answerNormalized = text.toLowerCase();
    const { captchaId } = captchaCreate(answerNormalized);
    return { captchaId, imageSvg };
}