import React, { useContext, useEffect } from 'react';
import { useNavigate, useSearchParams } from 'react-router-dom';
import { useTranslation } from 'react-i18next';
import { API, showError, showSuccess, updateAPI, setUserData } from '../../helpers';
import { UserContext } from '../../context/User';
import Loading from '../common/Loading';

const OAuth2Callback = (props) => {
  const { t } = useTranslation();
  const [searchParams] = useSearchParams();
  const [, userDispatch] = useContext(UserContext);
  const navigate = useNavigate();

  // 最大重试次数
  const MAX_RETRIES = 3;

  const sendCode = async (code, state, retry = 0) => {
    try {
      const { data: resData } = await API.get(
        `/api/oauth/${props.type}?code=${code}&state=${state}`,
      );

      const { success, message, data } = resData;

      if (!success) {
        throw new Error(message || 'OAuth2 callback error');
      }

      if (message === 'bind') {
        showSuccess(t('绑定成功！'));
        navigate('/console/personal');
      } else {
        userDispatch({ type: 'login', payload: data });
        localStorage.setItem('user', JSON.stringify(data));
        setUserData(data);
        updateAPI();
        showSuccess(t('登录成功！'));
        navigate('/console/token');
      }
    } catch (error) {
      if (retry < MAX_RETRIES) {
        // 递增的退避等待
        await new Promise((resolve) => setTimeout(resolve, (retry + 1) * 2000));
        return sendCode(code, state, retry + 1);
      }

      // 重试次数耗尽，提示错误并返回设置页面
      showError(error.message || t('授权失败'));
      navigate('/console/personal');
    }
  };

  useEffect(() => {
    const code = searchParams.get('code');
    const state = searchParams.get('state');

    // 参数缺失直接返回
    if (!code) {
      showError(t('未获取到授权码'));
      navigate('/console/personal');
      return;
    }

    sendCode(code, state);
  }, []);

  return <Loading />;
};

export default OAuth2Callback;
