import React, { useEffect, useState } from 'react';
import { API, copy, showError, showNotice, getLogo, getSystemName } from '../../helpers';
import { useSearchParams, Link } from 'react-router-dom';
import { Button, Card, Form, Typography, Banner } from '@douyinfe/semi-ui';
import { IconMail, IconLock, IconCopy } from '@douyinfe/semi-icons';
import { useTranslation } from 'react-i18next';

const { Text, Title } = Typography;

const PasswordResetConfirm = () => {
  const { t } = useTranslation();
  const [inputs, setInputs] = useState({
    email: '',
    token: '',
  });
  const { email, token } = inputs;
  const isValidResetLink = email && token;

  const [loading, setLoading] = useState(false);
  const [disableButton, setDisableButton] = useState(false);
  const [countdown, setCountdown] = useState(30);
  const [newPassword, setNewPassword] = useState('');
  const [searchParams, setSearchParams] = useSearchParams();
  const [formApi, setFormApi] = useState(null);

  const logo = getLogo();
  const systemName = getSystemName();

  useEffect(() => {
    let token = searchParams.get('token');
    let email = searchParams.get('email');
    setInputs({
      token: token || '',
      email: email || '',
    });
    if (formApi) {
      formApi.setValues({
        email: email || '',
        newPassword: newPassword || ''
      });
    }
  }, [searchParams, newPassword, formApi]);

  useEffect(() => {
    let countdownInterval = null;
    if (disableButton && countdown > 0) {
      countdownInterval = setInterval(() => {
        setCountdown(countdown - 1);
      }, 1000);
    } else if (countdown === 0) {
      setDisableButton(false);
      setCountdown(30);
    }
    return () => clearInterval(countdownInterval);
  }, [disableButton, countdown]);

  async function handleSubmit(e) {
    if (!email || !token) {
      showError(t('无效的重置链接，请重新发起密码重置请求'));
      return;
    }
    setDisableButton(true);
    setLoading(true);
    const res = await API.post(`/api/user/reset`, {
      email,
      token,
    });
    const { success, message } = res.data;
    if (success) {
      let password = res.data.data;
      setNewPassword(password);
      await copy(password);
      showNotice(`${t('密码已重置并已复制到剪贴板：')} ${password}`);
    } else {
      showError(message);
    }
    setLoading(false);
  }

  return (
    <div className="relative overflow-hidden bg-gray-100 flex items-center justify-center py-12 px-4 sm:px-6 lg:px-8">
      {/* 背景模糊晕染球 */}
      <div className="blur-ball blur-ball-indigo" style={{ top: '-80px', right: '-80px', transform: 'none' }} />
      <div className="blur-ball blur-ball-teal" style={{ top: '50%', left: '-120px' }} />
      <div className="w-full max-w-sm mt-[64px]">
        <div className="flex flex-col items-center">
          <div className="w-full max-w-md">
            <div className="flex items-center justify-center mb-6 gap-2">
              <img src={logo} alt="Logo" className="h-10 rounded-full" />
              <Title heading={3} className='!text-gray-800'>{systemName}</Title>
            </div>

            <Card className="shadow-xl border-0 !rounded-2xl overflow-hidden">
              <div className="flex justify-center pt-6 pb-2">
                <Title heading={3} className="text-gray-800 dark:text-gray-200">{t('密码重置确认')}</Title>
              </div>
              <div className="px-2 py-8">
                {!isValidResetLink && (
                  <Banner
                    type="danger"
                    description={t('无效的重置链接，请重新发起密码重置请求')}
                    className="mb-4 !rounded-lg"
                    closeIcon={null}
                  />
                )}
                <Form
                  getFormApi={(api) => setFormApi(api)}
                  initValues={{ email: email || '', newPassword: newPassword || '' }}
                  className="space-y-4"
                >
                  <Form.Input
                    field="email"
                    label={t('邮箱')}
                    name="email"
                    size="large"
                    className="!rounded-md"
                    disabled={true}
                    prefix={<IconMail />}
                    placeholder={email ? '' : t('等待获取邮箱信息...')}
                  />

                  {newPassword && (
                    <Form.Input
                      field="newPassword"
                      label={t('新密码')}
                      name="newPassword"
                      size="large"
                      className="!rounded-md"
                      disabled={true}
                      prefix={<IconLock />}
                      suffix={
                        <Button
                          icon={<IconCopy />}
                          type="tertiary"
                          theme="borderless"
                          onClick={async () => {
                            await copy(newPassword);
                            showNotice(`${t('密码已复制到剪贴板：')} ${newPassword}`);
                          }}
                        >
                          {t('复制')}
                        </Button>
                      }
                    />
                  )}

                  <div className="space-y-2 pt-2">
                    <Button
                      theme="solid"
                      className="w-full !rounded-full"
                      type="primary"
                      htmlType="submit"
                      size="large"
                      onClick={handleSubmit}
                      loading={loading}
                      disabled={disableButton || newPassword || !isValidResetLink}
                    >
                      {newPassword ? t('密码重置完成') : t('确认重置密码')}
                    </Button>
                  </div>
                </Form>

                <div className="mt-6 text-center text-sm">
                  <Text><Link to="/login" className="text-blue-600 hover:text-blue-800 font-medium">{t('返回登录')}</Link></Text>
                </div>
              </div>
            </Card>
          </div>
        </div>
      </div>
    </div>
  );
};

export default PasswordResetConfirm;
