/*
  Copyright 2016, Google, Inc.

  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 com.example.monitoring;

import static com.google.common.truth.Truth.assertThat;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;

/**
 * Tests for quickstart sample.
 */
@RunWith(JUnit4.class)
@SuppressWarnings("checkstyle:abbreviationaswordinname")
public class SnippetsIT {
  private ByteArrayOutputStream bout;
  private PrintStream out;
  private static final String LEGACY_PROJECT_ENV_NAME = "GCLOUD_PROJECT";
  private static final String PROJECT_ENV_NAME = "GOOGLE_CLOUD_PROJECT";

  private static String getProjectId() {
    String projectId = System.getProperty(PROJECT_ENV_NAME, System.getenv(PROJECT_ENV_NAME));
    if (projectId == null) {
      projectId = System.getProperty(LEGACY_PROJECT_ENV_NAME,
          System.getenv(LEGACY_PROJECT_ENV_NAME));
    }
    return projectId;
  }

  @Before
  public void setUp() {
    bout = new ByteArrayOutputStream();
    out = new PrintStream(bout);
    System.setOut(out);
  }

  @After
  public void tearDown() {
    System.setOut(null);
  }

  @Test
  public void testListMetricsDescriptor() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.listMetricDescriptors();
    // Assert
    String got = bout.toString();
    assertThat(got).contains("metricDescriptors/bigquery.googleapis.com/query/count");
  }

  @Test
  public void testListTimeSeries() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.listTimeSeries("metric.type=\"compute.googleapis.com/instance/cpu/utilization\"");

    // Assert
    String got = bout.toString();
    assertThat(got).contains("Got timeseries:");
  }

  @Test
  public void testListTimeSeriesHeader() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.listTimeSeriesHeaders();

    // Assert
    String got = bout.toString();
    assertThat(got).contains("Got timeseries headers:");
  }

  @Test
  public void testListTimeSeriesAggregate() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.listTimeSeriesAggregrate();

    // Assert
    String got = bout.toString();
    assertThat(got).contains("Got timeseries:");
  }

  @Test
  public void testListTimeSeriesReduce() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.listTimeSeriesReduce();

    // Assert
    String got = bout.toString();
    assertThat(got).contains("Got timeseries:");
  }

  @Test
  public void testGetResource() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.describeMonitoredResources("cloudsql_database");

    // Assert
    String got = bout.toString();
    assertThat(got).contains("\"A database hosted in Google Cloud SQL");
  }

  @Test
  public void testListResources() throws Exception {
    // Act
    System.setProperty("projectId", SnippetsIT.getProjectId());
    Snippets snippets = new Snippets();

    snippets.listMonitoredResources();

    // Assert
    String got = bout.toString();
    assertThat(got).contains("gce_instance");
  }
}
