/*
 * 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.authz;

import java.util.ArrayList;
import java.util.Collection;

import org.apache.shiro.authc.AuthenticationException;

import static org.assertj.core.api.Assertions.assertThat;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authz.permission.RolePermissionResolver;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.realm.Realm;
import org.apache.shiro.subject.PrincipalCollection;
import org.junit.jupiter.api.Test;

public class ModularRealmAuthorizerTest {

    @Test
    void testSettingOfRolePermissionResolver() {
        Collection<Realm> realms = new ArrayList<Realm>();

        realms.add(new MockAuthorizingRealm());
        realms.add(new MockAuthorizingRealm());

        // its null to start with
        for (Realm realm : realms) {
            assertThat(((AuthorizingRealm) realm).getRolePermissionResolver()).isNull();
        }

        ModularRealmAuthorizer modRealmAuthz = new ModularRealmAuthorizer();
        modRealmAuthz.setRealms(realms);

        // make sure they are still null
        for (Realm realm : realms) {
            assertThat(((AuthorizingRealm) realm).getRolePermissionResolver()).isNull();
        }

        // now set the RolePermissionResolver
        RolePermissionResolver rolePermissionResolver = new RolePermissionResolver() {
            public Collection<Permission> resolvePermissionsInRole(String roleString) {
                return null;
            }
        };
        modRealmAuthz.setRolePermissionResolver(rolePermissionResolver);

        // make sure they are set
        for (Realm realm : realms) {
            // check for same instance
            assertThat(((AuthorizingRealm) realm).getRolePermissionResolver() == rolePermissionResolver).isTrue();
        }

        // add a new realm and make sure the RolePermissionResolver is set
        MockAuthorizingRealm mockRealm = new MockAuthorizingRealm();
        realms.add(mockRealm);
        modRealmAuthz.setRealms(realms);
        assertThat(((AuthorizingRealm) mockRealm).getRolePermissionResolver() == rolePermissionResolver).isTrue();


// TODO: no way to unset them, not sure if that is a valid use case, but this is consistent with the PermissionResolver logic
//        // now just to be sure, unset them
//        modRealmAuthz.setRolePermissionResolver( null );
//        for ( Realm realm : realms )
//        {
//            assertNull( ((AuthorizingRealm)realm).getRolePermissionResolver() );
//        }


    }

    class MockAuthorizingRealm extends AuthorizingRealm {

        @Override
        protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
            return null;
        }

        @Override
        protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token)
                throws AuthenticationException {
            return null;
        }

    }
}
