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/*
Copyright 2020 The Kubernetes 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.kubernetes.client.extended.kubectl;

import io.kubernetes.client.common.KubernetesListObject;
import io.kubernetes.client.common.KubernetesObject;
import io.kubernetes.client.custom.V1Patch;
import io.kubernetes.client.extended.kubectl.exception.KubectlException;
import io.kubernetes.client.openapi.ApiException;
import io.kubernetes.client.util.Namespaces;
import io.kubernetes.client.util.Strings;
import io.kubernetes.client.util.generic.GenericKubernetesApi;
import io.kubernetes.client.util.generic.KubernetesApiResponse;
import io.kubernetes.client.util.generic.options.PatchOptions;

public class KubectlApply
    extends Kubectl.ResourceBuilder>
    implements Kubectl.Executable {

  private ApiType targetObj;
  private String fieldManager;
  private boolean forceConflict;

  public static final String DEFAULT_FIELD_MANAGER = "kubernetes-java-kubectl-apply";

  KubectlApply(Class apiTypeClass) {
    super(apiTypeClass);
    this.forceConflict = false;
    this.fieldManager = DEFAULT_FIELD_MANAGER;
  }

  public KubectlApply fieldManager(String fieldManager) {
    this.fieldManager = fieldManager;
    return this;
  }

  public KubectlApply forceConflict(boolean isForceConflict) {
    this.forceConflict = isForceConflict;
    return this;
  }

  public KubectlApply resource(ApiType obj) {
    this.targetObj = obj;
    return this;
  }

  private void validate() throws KubectlException {
    if (Strings.isNullOrEmpty(fieldManager)) {
      throw new KubectlException("Field-manager must not be empty for server-side-apply");
    }
  }

  @Override
  public ApiType execute() throws KubectlException {
    validate();
    return executeServerSideApply();
  }

  private ApiType executeServerSideApply() throws KubectlException {
    refreshDiscovery();

    GenericKubernetesApi api =
        getGenericApi(this.targetObj);
    if (api == null) {
      api = getGenericApi();
    }

    PatchOptions patchOptions = new PatchOptions();
    patchOptions.setForce(this.forceConflict);
    patchOptions.setFieldManager(this.fieldManager);

    if (isNamespaced(this.targetObj)) {
      String targetNamespace =
          namespace != null
              ? namespace
              : Strings.isNullOrEmpty(targetObj.getMetadata().getNamespace())
                  ? Namespaces.NAMESPACE_DEFAULT
                  : targetObj.getMetadata().getNamespace();

      KubernetesApiResponse response = null;
      try {
        return (ApiType)
            api.patch(
                    targetNamespace,
                    targetObj.getMetadata().getName(),
                    V1Patch.PATCH_FORMAT_APPLY_YAML,
                    new V1Patch(apiClient.getJSON().serialize(targetObj)),
                    patchOptions)
                .throwsApiException()
                .getObject();
      } catch (ApiException e) {
        throw new KubectlException(e);
      }
    } else {
      try {
        return (ApiType)
            api.patch(
                    targetObj.getMetadata().getName(),
                    V1Patch.PATCH_FORMAT_APPLY_YAML,
                    new V1Patch(apiClient.getJSON().serialize(targetObj)),
                    patchOptions)
                .throwsApiException()
                .getObject();
      } catch (ApiException e) {
        throw new KubectlException(e);
      }
    }
  }
}