/*
 * Copyright 2021 Apollo Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.ctrip.framework.apollo.portal.spi.ctrip;

import com.ctrip.framework.apollo.portal.spi.UserInfoHolder;
import com.ctrip.framework.apollo.portal.entity.bo.UserInfo;

import java.lang.reflect.Method;

/**
 * ctrip内部实现的获取用户信息
 */
public class CtripUserInfoHolder implements UserInfoHolder {

  private Object assertionHolder;

  private Method getAssertion;


  public CtripUserInfoHolder() {
    Class clazz = null;
    try {
      clazz = Class.forName("org.jasig.cas.client.util.AssertionHolder");
      assertionHolder = clazz.newInstance();
      getAssertion = assertionHolder.getClass().getMethod("getAssertion");
    } catch (Exception e) {
      throw new RuntimeException("init AssertionHolder fail", e);
    }
  }

  @Override
  public UserInfo getUser() {
    try {

      Object assertion = getAssertion.invoke(assertionHolder);
      Method getPrincipal = assertion.getClass().getMethod("getPrincipal");
      Object principal = getPrincipal.invoke(assertion);
      Method getName = principal.getClass().getMethod("getName");
      String name = (String) getName.invoke(principal);

      UserInfo userInfo = new UserInfo();
      userInfo.setUserId(name);

      return userInfo;
    } catch (Exception e) {
      throw new RuntimeException("get user info from assertion holder error", e);
    }
  }

}
