/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * 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.google.idea.blaze.base.run.testmap;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMultimap;
import com.google.idea.blaze.base.BlazeTestCase;
import com.google.idea.blaze.base.experiments.ExperimentService;
import com.google.idea.blaze.base.experiments.MockExperimentService;
import com.google.idea.blaze.base.ideinfo.ArtifactLocation;
import com.google.idea.blaze.base.ideinfo.RuleIdeInfo;
import com.google.idea.blaze.base.ideinfo.RuleMapBuilder;
import com.google.idea.blaze.base.ideinfo.TestIdeInfo;
import com.google.idea.blaze.base.model.primitives.Label;
import com.google.idea.blaze.base.rulemaps.ReverseDependencyMap;
import com.google.idea.blaze.base.run.testmap.TestRuleFinderImpl.TestMap;
import org.jetbrains.annotations.NotNull;
import org.junit.Test;

import java.io.File;

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

public class TestMapTest extends BlazeTestCase {
  private RuleMapBuilder ruleMapBuilder;

  @Override
  protected void initTest(@NotNull Container applicationServices, @NotNull Container projectServices) {
    super.initTest(applicationServices, projectServices);
    applicationServices.register(ExperimentService.class, new MockExperimentService());
    ruleMapBuilder = RuleMapBuilder.builder();
  }

  @Test
  public void testTrivialTestMap() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .addSource(sourceRoot("test/Test.java")))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), null))
      .containsExactly(new Label("//test:test"));
  }

  @Test
  public void testOneStepRemovedTestMap() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .addDependency("//test:lib"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), null))
      .containsExactly(new Label("//test:test"));
  }

  @Test
  public void testTwoCandidatesTestMap() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .addDependency("//test:lib"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test2")
                 .setKind("java_test")
                 .addDependency("//test:lib"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), null))
      .containsExactly(new Label("//test:test"), new Label("//test:test2"));
  }

  @Test
  public void testBfsPreferred() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib2")
                 .setKind("java_library")
                 .addDependency("//test:lib"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test2")
                 .setKind("java_test")
                 .addDependency("//test:lib2"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .addDependency("//test:lib"))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), null))
      .containsExactly(new Label("//test:test"), new Label("//test:test2"))
      .inOrder();
  }

  @Test
  public void testTestSizeFilter() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib2")
                 .setKind("java_library")
                 .addDependency("//test:lib"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test2")
                 .setKind("java_test")
                 .setTestInfo(TestIdeInfo.builder()
                       .setTestSize(TestIdeInfo.TestSize.LARGE))
                 .addDependency("//test:lib2"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .setTestInfo(TestIdeInfo.builder())
                 .addDependency("//test:lib"))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), TestIdeInfo.TestSize.LARGE))
      .containsExactly(new Label("//test:test2"))
      .inOrder();
  }

  @Test
  public void testSourceIncludedMultipleTimesFindsAll() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .addDependency("//test:lib"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test2")
                 .setKind("java_test")
                 .addDependency("//test:lib2"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib2")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), null))
      .containsExactly(new Label("//test:test"), new Label("//test:test2"));
  }

  @Test
  public void testSourceIncludedMultipleTimesShouldOnlyGiveOneInstanceOfTest() throws Exception {
    ImmutableMap<Label, RuleIdeInfo> ruleMap = ruleMapBuilder
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:test")
                 .setKind("java_test")
                 .addDependency("//test:lib")
                 .addDependency("//test:lib2"))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .addRule(RuleIdeInfo.builder()
                 .setBuildFile(sourceRoot("test/BUILD"))
                 .setLabel("//test:lib2")
                 .setKind("java_library")
                 .addSource(sourceRoot("test/Test.java")))
      .build();

    TestMap testMap = new TestMap(project, ruleMap);
    ImmutableMultimap<Label, Label> reverseDependencies = ReverseDependencyMap.createRdepsMap(ruleMap);
    assertThat(testMap.testTargetsForSourceFile(reverseDependencies, new File("/test/Test.java"), null))
      .containsExactly(new Label("//test:test"));
  }

  private ArtifactLocation sourceRoot(String relativePath) {
    return ArtifactLocation.builder()
      .setRootPath("/")
      .setRelativePath(relativePath)
      .setIsSource(true)
      .build();
  }
}