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/*
 * 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.flink.kubernetes.kubeclient;

import io.fabric8.kubernetes.api.model.Container;
import io.fabric8.kubernetes.api.model.ContainerBuilder;
import io.fabric8.kubernetes.api.model.Pod;
import io.fabric8.kubernetes.api.model.PodBuilder;

import static org.apache.flink.util.Preconditions.checkNotNull;

/**
 * A collection of variables that composes a JobManager/TaskManager Pod. This can include
 * the Pod, the main Container, and the init Container, etc.
 */
public class FlinkPod {

	private final Pod pod;

	private Container initContainer;

	private final Container mainContainer;

	public FlinkPod(Pod pod, Container initContainer, Container mainContainer) {
		this.pod = pod;
		this.initContainer = initContainer;
		this.mainContainer = mainContainer;
	}

	public Pod getPod() {
		return pod;
	}

	public Container getInitContainer() {
		return initContainer;
	}

	public Container getMainContainer() {
		return mainContainer;
	}

	/**
	 * Builder for creating a {@link FlinkPod}.
	 */
	public static class Builder {

		private Pod pod;
		private Container initContainer;
		private Container mainContainer;

		public Builder() {
			this.pod = new PodBuilder()
				.withNewMetadata()
					.endMetadata()
				.withNewSpec()
					.endSpec()
				.build();

			this.initContainer = new ContainerBuilder().build();
			this.mainContainer = new ContainerBuilder().build();
		}

		public Builder(FlinkPod flinkPod) {
			checkNotNull(flinkPod);
			this.pod = checkNotNull(flinkPod.getPod());
			this.initContainer = checkNotNull(flinkPod.getInitContainer());
			this.mainContainer = checkNotNull(flinkPod.getMainContainer());
		}

		public Builder withPod(Pod pod) {
			this.pod = checkNotNull(pod);
			return this;
		}

		public Builder withInitContainer(Container initContainer) {
			this.initContainer = checkNotNull(initContainer);
			return this;
		}

		public Builder withMainContainer(Container mainContainer) {
			this.mainContainer = checkNotNull(mainContainer);
			return this;
		}

		public FlinkPod build() {
			return new FlinkPod(this.pod, this.initContainer, this.mainContainer);
		}
	}
}