/*
 * 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.kylin.rest.security;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

import org.apache.commons.collections.CollectionUtils;
import org.springframework.security.acls.model.Permission;

import lombok.Getter;
import lombok.Setter;

@Setter
@Getter
public class CompositeAclPermission extends AclPermission {
    private Permission basePermission;
    private List<Permission> extPermissions;

    public CompositeAclPermission(Permission basePerm) {
        this(basePerm, new ArrayList<>());
    }

    public CompositeAclPermission(Permission basePermission, List<Permission> extPermissions) {
        super(basePermission.getMask() + (!CollectionUtils.isEmpty(extPermissions)
                ? extPermissions.stream().collect(Collectors.summingInt(Permission::getMask))
                : 0));
        this.basePermission = basePermission;
        this.extPermissions = extPermissions;
    }

    public CompositeAclPermission addExtPermission(Permission extPerm) {
        if (CollectionUtils.isEmpty(extPermissions)) {
            extPermissions = new ArrayList<>();
        }
        extPermissions.add(extPerm);
        return this;
    }

    public List<Integer> getExtMasks() {
        if (CollectionUtils.isEmpty(extPermissions)) {
            return Collections.emptyList();
        }
        return extPermissions.stream().map(Permission::getMask).collect(Collectors.toList());
    }
}
