import { useMemo, useState } from 'react';
import { useTranslation } from 'react-i18next';
import { Button, Divider, Input, Modal, QRCode, message } from 'antd';
import * as OTPAuth from 'otpauth';

import { ClipboardManager } from '@/utils';
import { activateOnKey } from '@/utils/a11y';
import { TotpCodeSchema } from '@/schemas/login';
import './TwoFactorModal.css';

type Type = 'set' | 'confirm';

interface TwoFactorModalProps {
  open: boolean;
  title?: string;
  description?: string;
  token?: string;
  type?: Type;
  onConfirm: (success: boolean, code?: string) => void;
  onOpenChange: (open: boolean) => void;
}

export default function TwoFactorModal({
  open,
  title = '',
  description = '',
  token = '',
  type = 'set',
  onConfirm,
  onOpenChange,
}: TwoFactorModalProps) {
  const { t } = useTranslation();
  const [messageApi, messageContextHolder] = message.useMessage();
  const [enteredCode, setEnteredCode] = useState('');

  const totp = useMemo(() => {
    if (!open || !token) return null;
    return new OTPAuth.TOTP({
      issuer: '3x-ui',
      label: 'Administrator',
      algorithm: 'SHA1',
      digits: 6,
      period: 30,
      secret: token,
    });
  }, [open, token]);
  const qrValue = totp ? totp.toString() : '';

  const [wasOpen, setWasOpen] = useState(false);
  if (open !== wasOpen) {
    setWasOpen(open);
    if (open) setEnteredCode('');
  }

  function close(success: boolean, code = '') {
    onConfirm(success, code);
    onOpenChange(false);
    setEnteredCode('');
  }

  function onOk() {
    const codeOk = TotpCodeSchema.safeParse(enteredCode);
    if (!codeOk.success) {
      messageApi.error(
        t(codeOk.error.issues[0]?.message ?? 'pages.settings.security.twoFactorModalError'),
      );
      return;
    }
    if (type === 'confirm' && !token) {
      close(true, codeOk.data);
      return;
    }
    if (!totp) return;
    if (totp.generate() === codeOk.data) {
      close(true);
    } else {
      messageApi.error(t('pages.settings.security.twoFactorModalError'));
    }
  }

  function onCancel() {
    close(false);
  }

  async function copyToken() {
    const ok = await ClipboardManager.copyText(token);
    if (ok) messageApi.success(t('copied'));
  }

  return (
    <>
      {messageContextHolder}
      <Modal
        open={open}
        title={title}
        closable
        onCancel={onCancel}
        footer={[
          <Button key="cancel" onClick={onCancel}>
            {t('cancel')}
          </Button>,
          <Button
            key="ok"
            type="primary"
            disabled={!TotpCodeSchema.safeParse(enteredCode).success}
            onClick={onOk}
          >
            {t('confirm')}
          </Button>,
        ]}
      >
        {type === 'set' ? (
          <>
            <p>{t('pages.settings.security.twoFactorModalSteps')}</p>
            <Divider />
            <p>{t('pages.settings.security.twoFactorModalFirstStep')}</p>
            <div
              className="qr-wrap"
              role="button"
              tabIndex={0}
              aria-label={t('copy')}
              onClick={copyToken}
              onKeyDown={activateOnKey(copyToken)}
            >
              <QRCode
                className="qr-code"
                value={qrValue}
                size={180}
                type="svg"
                bordered={false}
                color="#000000"
                bgColor="#ffffff"
                errorLevel="L"
                title={t('copy')}
              />
              <span className="qr-token">{token}</span>
            </div>
            <Divider />
            <p>{t('pages.settings.security.twoFactorModalSecondStep')}</p>
            <Input
              value={enteredCode}
              onChange={(e) => setEnteredCode(e.target.value)}
              style={{ width: '100%' }}
              aria-label={t('twoFactorCode')}
            />
          </>
        ) : (
          <>
            <p>{description}</p>
            <Input
              value={enteredCode}
              onChange={(e) => setEnteredCode(e.target.value)}
              style={{ width: '100%' }}
              aria-label={t('twoFactorCode')}
            />
          </>
        )}
      </Modal>
    </>
  );
}