/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.shiro.spring.config;
  
  import org.apache.shiro.authc.Authenticator;
  import org.apache.shiro.authc.pam.AtLeastOneSuccessfulStrategy;
  import org.apache.shiro.authc.pam.AuthenticationStrategy;
  import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
  import org.apache.shiro.authz.Authorizer;
  import org.apache.shiro.authz.ModularRealmAuthorizer;
  import org.apache.shiro.authz.permission.PermissionResolver;
  import org.apache.shiro.authz.permission.RolePermissionResolver;
  import org.apache.shiro.cache.CacheManager;
  import org.apache.shiro.config.Ini;
  import org.apache.shiro.event.EventBus;
  import org.apache.shiro.mgt.*;
  import org.apache.shiro.realm.Realm;
  import org.apache.shiro.realm.text.IniRealm;
  import org.apache.shiro.session.mgt.DefaultSessionManager;
  import org.apache.shiro.session.mgt.SessionFactory;
  import org.apache.shiro.session.mgt.SessionManager;
  import org.apache.shiro.session.mgt.SimpleSessionFactory;
  import org.apache.shiro.session.mgt.eis.MemorySessionDAO;
  import org.apache.shiro.session.mgt.eis.SessionDAO;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.beans.factory.annotation.Value;
  
  import java.util.List;
  
  /**
   * @since 1.4.0
   */
  public class AbstractShiroConfiguration {
  
      @Autowired(required = false)
      protected CacheManager cacheManager;
  
      @Autowired(required = false)
      protected RolePermissionResolver rolePermissionResolver;
  
      @Autowired(required = false)
      protected PermissionResolver permissionResolver;
  
      @Autowired
      protected EventBus eventBus;
  
      @Value("#{ @environment['shiro.sessionManager.deleteInvalidSessions'] ?: true }")
      protected boolean sessionManagerDeleteInvalidSessions;
  
  
      protected SessionsSecurityManager securityManager(List<Realm> realms) {
          SessionsSecurityManager securityManager = createSecurityManager();
          securityManager.setAuthenticator(authenticator());
          securityManager.setAuthorizer(authorizer());
          securityManager.setRealms(realms);
          securityManager.setSessionManager(sessionManager());
          securityManager.setEventBus(eventBus);
  
          if (cacheManager != null) {
              securityManager.setCacheManager(cacheManager);
          }
  
          return securityManager;
      }
  
      protected SessionManager sessionManager() {
          DefaultSessionManager sessionManager = new DefaultSessionManager();
          sessionManager.setSessionDAO(sessionDAO());
          sessionManager.setSessionFactory(sessionFactory());
          sessionManager.setDeleteInvalidSessions(sessionManagerDeleteInvalidSessions);
          return sessionManager;
      }
  
  
      protected SessionsSecurityManager createSecurityManager() {
          DefaultSecurityManager securityManager = new DefaultSecurityManager();
          securityManager.setSubjectDAO(subjectDAO());
          securityManager.setSubjectFactory(subjectFactory());
  
          RememberMeManager rememberMeManager = rememberMeManager();
          if (rememberMeManager != null) {
              securityManager.setRememberMeManager(rememberMeManager);
          }
 
         return securityManager;
     }
 
     protected RememberMeManager rememberMeManager() {
         return null;
     }
 
     protected SubjectDAO subjectDAO() {
         DefaultSubjectDAO subjectDAO = new DefaultSubjectDAO();
         subjectDAO.setSessionStorageEvaluator(sessionStorageEvaluator());
         return subjectDAO;
     }
 
     protected SessionStorageEvaluator sessionStorageEvaluator() {
         return new DefaultSessionStorageEvaluator();
     }
 
     protected SubjectFactory subjectFactory() {
         return new DefaultSubjectFactory();
     }
 
 
     protected SessionFactory sessionFactory() {
         return new SimpleSessionFactory();
     }
 
     protected SessionDAO sessionDAO() {
         return new MemorySessionDAO();
     }
 
     protected Authorizer authorizer() {
         ModularRealmAuthorizer authorizer = new ModularRealmAuthorizer();
 
         if (permissionResolver != null) {
             authorizer.setPermissionResolver(permissionResolver);
         }
 
         if (rolePermissionResolver != null) {
             authorizer.setRolePermissionResolver(rolePermissionResolver);
         }
 
         return authorizer;
     }
 
     protected AuthenticationStrategy authenticationStrategy() {
         return new AtLeastOneSuccessfulStrategy();
     }
 
     protected Authenticator authenticator() {
         ModularRealmAuthenticator authenticator = new ModularRealmAuthenticator();
         authenticator.setAuthenticationStrategy(authenticationStrategy());
         return authenticator;
     }
 
     protected Realm iniRealmFromLocation(String iniLocation) {
         Ini ini = Ini.fromResourcePath(iniLocation);
         return new IniRealm( ini );
     }
 }