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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2017 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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 org.wildfly.naming.security;

import javax.naming.InvalidNameException;

import org.wildfly.naming.client.SimpleName;
import org.wildfly.security.permission.AbstractActionSetPermission;
import org.wildfly.security.permission.AbstractPermissionCollection;
import org.wildfly.security.permission.SimplePermissionCollection;
import org.wildfly.security.util.StringEnumeration;

/**
 * An abstract base class for naming permissions which are based on {@link SimpleName} and which support separate
 * actions for each naming operation.
 *
 * @author David M. Lloyd
 */
public abstract class AbstractNamingPermission> extends AbstractActionSetPermission {

    private static final long serialVersionUID = - 2355041296353728334L;

    private static final StringEnumeration actionStrings = StringEnumeration.of(
        "bind",
        "rebind",
        "unbind",
        "lookup",
        "list",
        "listBindings",
        "createSubcontext",
        "destroySubcontext",
        "addNamingListener"
    );

    private static final int ACTION_BIND                = 0b000000001;
    private static final int ACTION_REBIND              = 0b000000010;
    private static final int ACTION_UNBIND              = 0b000000100;
    private static final int ACTION_LOOKUP              = 0b000001000;
    private static final int ACTION_LIST                = 0b000010000;
    private static final int ACTION_LIST_BINDINGS       = 0b000100000;
    private static final int ACTION_CREATE_SUBCTXT      = 0b001000000;
    private static final int ACTION_DESTROY_SUBCTXT     = 0b010000000;
    private static final int ACTION_ADD_NAMING_LISTENER = 0b100000000;

    private static final int ALL                        = 0b111111111;

    private final SimpleName simpleName;

    protected AbstractNamingPermission(final String name, final String actions) throws InvalidNameException {
        this(new SimpleName(name), actions);
    }

    protected AbstractNamingPermission(final SimpleName simpleName, final String actions) {
        super(simpleName.toString(), actions, actionStrings);
        this.simpleName = simpleName;
    }

    protected AbstractNamingPermission(final String name, final int actionBits) throws InvalidNameException {
        this(new SimpleName(name), actionBits);
    }

    protected AbstractNamingPermission(final SimpleName simpleName, final int actionBits) {
        super(simpleName.toString(), actionBits, actionStrings);
        this.simpleName = simpleName;
    }

    public boolean impliesName(final This permission) {
        return permission != null && impliesName(permission.getSimpleName());
    }

    public boolean impliesName(final String name) {
        try {
            return impliesName(new SimpleName(name));
        } catch (InvalidNameException e) {
            return false;
        }
    }

    public boolean impliesName(SimpleName otherName) {
        return SimpleNamePermissions.impliesName(simpleName, otherName);
    }

    public boolean nameEquals(final String name) {
        try {
            return nameEquals(new SimpleName(name));
        } catch (InvalidNameException e) {
            return false;
        }
    }

    public boolean nameEquals(final SimpleName name) {
        return simpleName.equals(name);
    }

    protected SimpleName getSimpleName() {
        return simpleName;
    }

    protected This constructWithActionBits(final int actionBits) {
        return constructNew(simpleName, actionBits);
    }

    protected abstract This constructNew(SimpleName simpleName, int actionBits);

    public AbstractPermissionCollection newPermissionCollection() {
        return new SimplePermissionCollection(this);
    }
}