/*
 * 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.hadoop.hbase.master.http;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;

import javax.servlet.http.HttpServletRequest;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.AsyncConnection;
import org.apache.hadoop.hbase.master.RegionState;
import org.apache.hadoop.hbase.master.http.TestMetaBrowser.MockRequestBuilder;
import org.apache.hadoop.hbase.testclassification.MasterTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

@Tag(MasterTests.TAG)
@Tag(SmallTests.TAG)
public class TestMetaBrowserNoCluster {

  @Mock
  private AsyncConnection connection;

  @BeforeEach
  public void before() {
    MockitoAnnotations.openMocks(this);
  }

  @Test
  public void buildFirstPageQueryStringNoParams() {
    final HttpServletRequest request = new MockRequestBuilder().build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);

    assertEquals("hbase:meta", metaBrowser.getName());
    assertNull(metaBrowser.getScanLimit());
    assertNull(metaBrowser.getScanRegionState());
    assertNull(metaBrowser.getScanStart());
    assertNull(metaBrowser.getScanTable());
    assertEquals("/table.jsp?name=hbase%3Ameta", metaBrowser.buildFirstPageUrl());
  }

  @Test
  public void buildFirstPageQueryStringNonNullParams() {
    final HttpServletRequest request = new MockRequestBuilder().setLimit(50)
      .setRegionState(RegionState.State.ABNORMALLY_CLOSED).setTable("foo%3Abar").build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);

    assertEquals(50, metaBrowser.getScanLimit().intValue());
    assertEquals(RegionState.State.ABNORMALLY_CLOSED, metaBrowser.getScanRegionState());
    assertEquals(TableName.valueOf("foo", "bar"), metaBrowser.getScanTable());
    assertEquals("/table.jsp?name=hbase%3Ameta" + "&scan_limit=50"
      + "&scan_region_state=ABNORMALLY_CLOSED" + "&scan_table=foo%3Abar",
      metaBrowser.buildNextPageUrl(null));
  }

  @Test
  public void buildNextPageQueryString() {
    final HttpServletRequest request = new MockRequestBuilder().build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);

    assertEquals("/table.jsp?name=hbase%3Ameta&scan_start=%255Cx80%255Cx00%255Cx7F",
      metaBrowser.buildNextPageUrl(new byte[] { Byte.MIN_VALUE, (byte) 0, Byte.MAX_VALUE }));
  }

  @Test
  public void unparseableLimitParam() {
    final HttpServletRequest request = new MockRequestBuilder().setLimit("foo").build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);
    assertNull(metaBrowser.getScanLimit());
    assertThat(metaBrowser.getErrorMessages(),
      contains("Requested SCAN_LIMIT value 'foo' cannot be parsed as an integer."));
  }

  @Test
  public void zeroLimitParam() {
    final HttpServletRequest request = new MockRequestBuilder().setLimit(0).build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);
    assertEquals(MetaBrowser.SCAN_LIMIT_DEFAULT, metaBrowser.getScanLimit().intValue());
    assertThat(metaBrowser.getErrorMessages(), contains("Requested SCAN_LIMIT value 0 is <= 0."));
  }

  @Test
  public void negativeLimitParam() {
    final HttpServletRequest request = new MockRequestBuilder().setLimit(-10).build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);
    assertEquals(MetaBrowser.SCAN_LIMIT_DEFAULT, metaBrowser.getScanLimit().intValue());
    assertThat(metaBrowser.getErrorMessages(), contains("Requested SCAN_LIMIT value -10 is <= 0."));
  }

  @Test
  public void excessiveLimitParam() {
    final HttpServletRequest request = new MockRequestBuilder().setLimit(10_001).build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);
    assertEquals(MetaBrowser.SCAN_LIMIT_MAX, metaBrowser.getScanLimit().intValue());
    assertThat(metaBrowser.getErrorMessages(),
      contains("Requested SCAN_LIMIT value 10001 exceeds maximum value 10000."));
  }

  @Test
  public void invalidRegionStateParam() {
    final HttpServletRequest request = new MockRequestBuilder().setRegionState("foo").build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);
    assertNull(metaBrowser.getScanRegionState());
    assertThat(metaBrowser.getErrorMessages(),
      contains("Requested SCAN_REGION_STATE value 'foo' cannot be parsed as a RegionState."));
  }

  @Test
  public void multipleErrorMessages() {
    final HttpServletRequest request =
      new MockRequestBuilder().setLimit("foo").setRegionState("bar").build();
    final MetaBrowser metaBrowser = new MetaBrowser(connection, request);
    assertThat(metaBrowser.getErrorMessages(),
      containsInAnyOrder("Requested SCAN_LIMIT value 'foo' cannot be parsed as an integer.",
        "Requested SCAN_REGION_STATE value 'bar' cannot be parsed as a RegionState."));
  }
}