/*
 * Copyright Java Operator SDK Authors
 *
 * 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 io.javaoperatorsdk.operator.baseapi.manualobservedgeneration;

import java.util.Objects;
import java.util.concurrent.atomic.AtomicInteger;

import io.fabric8.kubernetes.api.model.ObjectMetaBuilder;
import io.javaoperatorsdk.operator.api.reconciler.*;

@ControllerConfiguration
public class ManualObservedGenerationReconciler
    implements Reconciler<ManualObservedGenerationCustomResource> {

  private final AtomicInteger numberOfExecutions = new AtomicInteger(0);

  @Override
  public UpdateControl<ManualObservedGenerationCustomResource> reconcile(
      ManualObservedGenerationCustomResource resource,
      Context<ManualObservedGenerationCustomResource> context) {
    numberOfExecutions.addAndGet(1);
    var resourceForStatusPatch = resourceForStatusPatch(resource);
    if (!Objects.equals(
        resource.getMetadata().getGeneration(),
        resourceForStatusPatch.getStatus().getObservedGeneration())) {
      resourceForStatusPatch
          .getStatus()
          .setObservedGeneration(resource.getMetadata().getGeneration());
      return UpdateControl.patchStatus(resourceForStatusPatch);
    } else {
      return UpdateControl.noUpdate();
    }
  }

  private ManualObservedGenerationCustomResource resourceForStatusPatch(
      ManualObservedGenerationCustomResource original) {
    var res = new ManualObservedGenerationCustomResource();
    res.setMetadata(
        new ObjectMetaBuilder()
            .withName(original.getMetadata().getName())
            .withNamespace(original.getMetadata().getNamespace())
            .build());
    res.setStatus(original.getStatus());
    if (res.getStatus() == null) {
      res.setStatus(new ManualObservedGenerationStatus());
    }
    return res;
  }

  public int getNumberOfExecutions() {
    return numberOfExecutions.get();
  }
}
