/**
 * Copyright 2024 Google LLC
 * 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.
 */

'use strict';

async function createInstanceWithProcessingUnits(instanceId, projectId) {
  // [START spanner_create_instance_with_processing_units]

  // Imports the Google Cloud client library
  const {Spanner} = require('@google-cloud/spanner');

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const projectId = 'my-project-id';
  // const instanceId = 'my-instance';

  // Creates a client
  const spanner = new Spanner({
    projectId: projectId,
  });

  const instanceAdminClient = spanner.getInstanceAdminClient();

  // Creates a new instance
  try {
    const instancePath = instanceAdminClient.instancePath(
      projectId,
      instanceId
    );
    console.log(`Creating instance ${instancePath}.`);

    const [operation] = await instanceAdminClient.createInstance({
      instanceId: instanceId,
      instance: {
        config: instanceAdminClient.instanceConfigPath(
          projectId,
          'regional-us-central1'
        ),
        displayName: 'Display name for the instance.',
        processingUnits: 500,
        labels: {
          cloud_spanner_samples: 'true',
          created: Math.round(Date.now() / 1000).toString(), // current time
        },
      },
      parent: instanceAdminClient.projectPath(projectId),
    });

    console.log(`Waiting for operation on ${instanceId} to complete...`);
    await operation.promise();
    console.log(`Created instance ${instanceId}.`);
    const [metadata] = await instanceAdminClient.getInstance({
      name: instancePath,
    });
    console.log(
      `Instance ${instanceId} has ${metadata.processingUnits} ` +
        'processing units.'
    );
  } catch (err) {
    console.error('Error creating instance with processing units:', err);
  } finally {
    spanner.close();
  }
  // [END spanner_create_instance_with_processing_units]
}

module.exports.createInstanceWithProcessingUnits =
  createInstanceWithProcessingUnits;
