/*-
 * 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.sling.query.impl.resource;

import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;

import javax.jcr.Node;
import javax.jcr.RepositoryException;

import org.apache.commons.lang.StringUtils;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.query.impl.resource.jcr.JcrTypeResolver;
import org.apache.sling.query.impl.selector.parser.Attribute;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ResourcePredicate implements Predicate<Resource> {

    private static final Logger LOG = LoggerFactory.getLogger(ResourcePredicate.class);

    private final String resourceType;

    private final String resourceName;

    private final List<Predicate<Resource>> subPredicates;

    private JcrTypeResolver typeResolver;

    public ResourcePredicate(String resourceType, String resourceName, List<Attribute> attributes,
            JcrTypeResolver typeResolver) {
        this.resourceType = resourceType;
        this.resourceName = resourceName;
        this.subPredicates = new ArrayList<>();
        for (Attribute a : attributes) {
            subPredicates.add(new ResourcePropertyPredicate(a));
        }
        this.typeResolver = typeResolver;
    }

    @Override
    public boolean test(Resource resource) {
        if (StringUtils.isNotBlank(resourceName) && !resource.getName().equals(resourceName)) {
            return false;
        }
        if (!isResourceType(resource, resourceType)) {
            return false;
        }
        for (Predicate<Resource> predicate : subPredicates) {
            if (!predicate.test(resource)) {
                return false;
            }
        }
        return true;
    }

    private boolean isResourceType(Resource resource, String resourceType) {
        if (StringUtils.isBlank(resourceType)) {
            return true;
        }
        if (resource.isResourceType(resourceType)) {
            return true;
        }
        if (!isValidType(resourceType)) {
            return false;
        }
        Node node = resource.adaptTo(Node.class);
        try {
            if (node != null) {
                return node.isNodeType(resourceType);
            }
        } catch (RepositoryException e) {
            LOG.error("Can't check node type", e);
        }
        return false;
    }

    private boolean isValidType(String type) {
        return typeResolver.isJcrType(type);
    }
}