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/*
 * Copyright 2016 Red Hat, Inc.
 *
 * Red Hat 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 io.fabric8.maven.plugin.enricher;

import java.util.Map;

import io.fabric8.kubernetes.api.builder.Visitor;
import io.fabric8.kubernetes.api.model.ReplicationControllerSpecBuilder;
import io.fabric8.kubernetes.api.model.ServiceSpecBuilder;
import io.fabric8.kubernetes.api.model.extensions.DeploymentSpecBuilder;
import io.fabric8.kubernetes.api.model.extensions.LabelSelector;
import io.fabric8.kubernetes.api.model.extensions.LabelSelectorBuilder;
import io.fabric8.kubernetes.api.model.extensions.ReplicaSetSpecBuilder;
import io.fabric8.maven.enricher.api.Kind;

import static io.fabric8.maven.plugin.enricher.ProjectInfoEnricher.removeVersionSelector;

/**
 * @author roland
 * @since 02/05/16
 */
public abstract class SelectorVisitor implements Visitor {

    protected final EnricherManager enricher;

    public SelectorVisitor(EnricherManager enricher) {
        this.enricher = enricher;
    }

    abstract public void visit(T item);

    // ========================================================================

    static public class Service extends SelectorVisitor {

        public Service(EnricherManager enricher) {
            super(enricher);
        }

        @Override
        public void visit(ServiceSpecBuilder item) {
            item.getSelector().putAll(enricher.extractSelector(Kind.SERVICE));
        }
    }

    static public class Deployment extends SelectorVisitor {

        public Deployment(EnricherManager enricher) {
            super(enricher);
        }

        @Override
        public void visit(DeploymentSpecBuilder item) {
            Map selectorMatchLabels = removeVersionSelector(enricher.extractSelector(Kind.REPLICATION_CONTROLLER));
            LabelSelector selector = item.getSelector();
            if (selector == null) {
                item.withNewSelector().addToMatchLabels(selectorMatchLabels).endSelector();
            } else {
                selector.getMatchLabels().putAll(selectorMatchLabels);
            }
        }
    }

    static public class ReplicationController extends SelectorVisitor {

        public ReplicationController(EnricherManager enricher) {
            super(enricher);
        }

        @Override
        public void visit(ReplicationControllerSpecBuilder item) {
            item.getSelector().putAll(enricher.extractSelector(Kind.REPLICATION_CONTROLLER));
        }
    }

    static public class ReplicaSet extends SelectorVisitor {

        public ReplicaSet(EnricherManager enricher) {
            super(enricher);
        }

        @Override
        public void visit(ReplicaSetSpecBuilder item) {
            item.withSelector(createLabelSelector(enricher.extractSelector(Kind.REPLICA_SET)));
        }

        private LabelSelector createLabelSelector(Map labelSelector) {
            return new LabelSelectorBuilder().withMatchLabels(labelSelector).build();
        }
    }

}