/*
 * SonarQube
 * Copyright (C) 2009-2023 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.scanner.mediumtest.scm;

import com.google.common.collect.ImmutableMap;
import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.util.regex.Pattern;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.io.FileUtils;
import org.assertj.core.util.Files;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.slf4j.event.Level;
import org.sonar.api.SonarEdition;
import org.sonar.api.testfixtures.log.LogTester;
import org.sonar.scanner.mediumtest.ScannerMediumTester;
import org.sonar.scanner.mediumtest.ScannerMediumTester.AnalysisBuilder;
import org.sonar.scanner.protocol.output.FileStructure;
import org.sonar.scanner.protocol.output.ScannerReport;
import org.sonar.scanner.protocol.output.ScannerReport.Changesets.Changeset;
import org.sonar.scanner.protocol.output.ScannerReport.Component;
import org.sonar.scanner.protocol.output.ScannerReportReader;
import org.sonar.scanner.repository.FileData;
import org.sonar.xoo.XooPlugin;
import org.sonar.xoo.rule.XooRulesDefinition;

import static org.assertj.core.api.Assertions.assertThat;

public class ScmMediumIT {

  private static final String MISSING_BLAME_INFORMATION_FOR_THE_FOLLOWING_FILES = "Missing blame information for the following files:";
  private static final String CHANGED_CONTENT_SCM_ON_SERVER_XOO = "src/changed_content_scm_on_server.xoo";
  private static final String NO_BLAME_SCM_ON_SERVER_XOO = "src/no_blame_scm_on_server.xoo";
  private static final String SAME_CONTENT_SCM_ON_SERVER_XOO = "src/same_content_scm_on_server.xoo";
  private static final String SAME_CONTENT_NO_SCM_ON_SERVER_XOO = "src/same_content_no_scm_on_server.xoo";
  private static final String SAMPLE_XOO_CONTENT = "Sample xoo\ncontent";

  @Rule
  public TemporaryFolder temp = new TemporaryFolder();

  @Rule
  public LogTester logTester = new LogTester();

  @Rule
  public ScannerMediumTester tester = new ScannerMediumTester()
    .setEdition(SonarEdition.COMMUNITY)
    .registerPlugin("xoo", new XooPlugin())
    .addDefaultQProfile("xoo", "Sonar Way")
    .addRules(new XooRulesDefinition())
    // active a rule just to be sure that xoo files are published
    .addActiveRule("xoo", "xoo:OneIssuePerFile", null, "One Issue Per File", null, null, null)
    .addFileData(CHANGED_CONTENT_SCM_ON_SERVER_XOO, new FileData(DigestUtils.md5Hex(SAMPLE_XOO_CONTENT), null))
    .addFileData(SAME_CONTENT_NO_SCM_ON_SERVER_XOO, new FileData(DigestUtils.md5Hex(SAMPLE_XOO_CONTENT), null))
    .addFileData(SAME_CONTENT_SCM_ON_SERVER_XOO, new FileData(DigestUtils.md5Hex(SAMPLE_XOO_CONTENT), "1.1"))
    .addFileData(NO_BLAME_SCM_ON_SERVER_XOO, new FileData(DigestUtils.md5Hex(SAMPLE_XOO_CONTENT), "1.1"));

  @Test
  public void testScmMeasure() throws IOException, URISyntaxException {
    File baseDir = prepareProject();

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.sources", "src")
        .put("sonar.scm.provider", "xoo")
        .build())
      .execute();

    ScannerReport.Changesets fileScm = getChangesets(baseDir, "src/sample.xoo");

    assertThat(fileScm.getChangesetIndexByLineList()).hasSize(5);

    Changeset changesetLine1 = fileScm.getChangeset(fileScm.getChangesetIndexByLine(0));
    assertThat(changesetLine1.getAuthor()).isEmpty();

    Changeset changesetLine2 = fileScm.getChangeset(fileScm.getChangesetIndexByLine(1));
    assertThat(changesetLine2.getAuthor()).isEqualTo(getNonAsciiAuthor().toLowerCase());

    Changeset changesetLine3 = fileScm.getChangeset(fileScm.getChangesetIndexByLine(2));
    assertThat(changesetLine3.getAuthor()).isEqualTo("julien");

    Changeset changesetLine4 = fileScm.getChangeset(fileScm.getChangesetIndexByLine(3));
    assertThat(changesetLine4.getAuthor()).isEqualTo("julien");

    Changeset changesetLine5 = fileScm.getChangeset(fileScm.getChangesetIndexByLine(4));
    assertThat(changesetLine5.getAuthor()).isEqualTo("simon");
  }

  private ScannerReport.Changesets getChangesets(File baseDir, String path) {
    File reportDir = new File(baseDir, ".sonar/scanner-report");
    FileStructure fileStructure = new FileStructure(reportDir);
    ScannerReportReader reader = new ScannerReportReader(fileStructure);

    Component project = reader.readComponent(reader.readMetadata().getRootComponentRef());
    for (Integer fileRef : project.getChildRefList()) {
      Component file = reader.readComponent(fileRef);
      if (file.getProjectRelativePath().equals(path)) {
        return reader.readChangesets(file.getRef());
      }
    }
    return null;
  }

  @Test
  public void noScmOnEmptyFile() throws IOException, URISyntaxException {

    File baseDir = prepareProject();

    // Clear file content
    FileUtils.write(new File(baseDir, "src/sample.xoo"), "");

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.task", "scan")
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.projectName", "Foo Project")
        .put("sonar.projectVersion", "1.0-SNAPSHOT")
        .put("sonar.projectDescription", "Description of Foo Project")
        .put("sonar.sources", "src")
        .put("sonar.scm.provider", "xoo")
        .build())
      .execute();

    ScannerReport.Changesets changesets = getChangesets(baseDir, "src/sample.xoo");

    assertThat(changesets).isNull();
  }

  @Test
  public void log_files_with_missing_blame() throws IOException, URISyntaxException {
    logTester.setLevel(Level.DEBUG);
    File baseDir = prepareProject();
    File xooFileWithoutBlame = new File(baseDir, "src/sample_no_blame.xoo");
    FileUtils.write(xooFileWithoutBlame, "Sample xoo\ncontent\n3\n4\n5", StandardCharsets.UTF_8);

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.task", "scan")
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.projectName", "Foo Project")
        .put("sonar.projectVersion", "1.0-SNAPSHOT")
        .put("sonar.projectDescription", "Description of Foo Project")
        .put("sonar.sources", "src")
        .put("sonar.scm.provider", "xoo")
        .build())
      .execute();

    ScannerReport.Changesets file1Scm = getChangesets(baseDir, "src/sample.xoo");
    assertThat(file1Scm).isNotNull();

    ScannerReport.Changesets fileWithoutBlameScm = getChangesets(baseDir, "src/sample_no_blame.xoo");
    assertThat(fileWithoutBlameScm).isNull();

    assertThat(logTester.logs()).containsSubsequence("SCM Publisher 2 source files to be analyzed", MISSING_BLAME_INFORMATION_FOR_THE_FOLLOWING_FILES,
      "  * src/sample_no_blame.xoo");

    assertThat(logTester.logs().stream().anyMatch(s -> Pattern.matches("SCM Publisher 1/2 source file have been analyzed \\(done\\) \\| time=[0-9]+ms", s))).isTrue();
  }

  // SONAR-6397
  @Test
  public void optimize_blame() throws IOException, URISyntaxException {
    logTester.setLevel(Level.DEBUG);
    File baseDir = prepareProject();
    File changedContentScmOnServer = new File(baseDir, CHANGED_CONTENT_SCM_ON_SERVER_XOO);
    FileUtils.write(changedContentScmOnServer, SAMPLE_XOO_CONTENT + "\nchanged", StandardCharsets.UTF_8);
    File xooScmFile = new File(baseDir, CHANGED_CONTENT_SCM_ON_SERVER_XOO + ".scm");
    FileUtils.write(xooScmFile,
      // revision,author,dateTime
      "1,foo,2013-01-04\n" +
        "1,bar,2013-01-04\n" +
        "2,biz,2014-01-04\n",
      StandardCharsets.UTF_8);

    File sameContentScmOnServer = new File(baseDir, SAME_CONTENT_SCM_ON_SERVER_XOO);
    FileUtils.write(sameContentScmOnServer, SAMPLE_XOO_CONTENT, StandardCharsets.UTF_8);
    // No need to write .scm file since this file should not be blamed

    File noBlameScmOnServer = new File(baseDir, NO_BLAME_SCM_ON_SERVER_XOO);
    FileUtils.write(noBlameScmOnServer, SAMPLE_XOO_CONTENT + "\nchanged", StandardCharsets.UTF_8);
    // No .scm file to emulate a failure during blame

    File sameContentNoScmOnServer = new File(baseDir, SAME_CONTENT_NO_SCM_ON_SERVER_XOO);
    FileUtils.write(sameContentNoScmOnServer, SAMPLE_XOO_CONTENT, StandardCharsets.UTF_8);
    xooScmFile = new File(baseDir, SAME_CONTENT_NO_SCM_ON_SERVER_XOO + ".scm");
    FileUtils.write(xooScmFile,
      // revision,author,dateTime
      "1,foo,2013-01-04\n" +
        "1,bar,2013-01-04\n",
      StandardCharsets.UTF_8);

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.task", "scan")
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.projectName", "Foo Project")
        .put("sonar.projectVersion", "1.0-SNAPSHOT")
        .put("sonar.projectDescription", "Description of Foo Project")
        .put("sonar.sources", "src")
        .put("sonar.scm.provider", "xoo")
        .build())
      .execute();

    assertThat(getChangesets(baseDir, "src/sample.xoo")).isNotNull();

    assertThat(getChangesets(baseDir, CHANGED_CONTENT_SCM_ON_SERVER_XOO).getCopyFromPrevious()).isFalse();

    assertThat(getChangesets(baseDir, SAME_CONTENT_SCM_ON_SERVER_XOO).getCopyFromPrevious()).isTrue();

    assertThat(getChangesets(baseDir, SAME_CONTENT_NO_SCM_ON_SERVER_XOO).getCopyFromPrevious()).isFalse();

    assertThat(getChangesets(baseDir, NO_BLAME_SCM_ON_SERVER_XOO)).isNull();

    // 5 .xoo files + 3 .scm files, but only 4 marked for publishing. 1 file is SAME so not included in the total
    assertThat(logTester.logs()).containsSubsequence("8 files indexed");
    assertThat(logTester.logs()).containsSubsequence("SCM Publisher 4 source files to be analyzed");
    assertThat(logTester.logs().stream().anyMatch(s -> Pattern.matches("SCM Publisher 3/4 source files have been analyzed \\(done\\) \\| time=[0-9]+ms", s))).isTrue();
    assertThat(logTester.logs()).containsSubsequence(MISSING_BLAME_INFORMATION_FOR_THE_FOLLOWING_FILES, "  * src/no_blame_scm_on_server.xoo");
  }

  @Test
  public void forceReload() throws IOException, URISyntaxException {

    File baseDir = prepareProject();
    File xooFileNoScm = new File(baseDir, SAME_CONTENT_SCM_ON_SERVER_XOO);
    FileUtils.write(xooFileNoScm, SAMPLE_XOO_CONTENT, StandardCharsets.UTF_8);
    File xooScmFile = new File(baseDir, SAME_CONTENT_SCM_ON_SERVER_XOO + ".scm");
    FileUtils.write(xooScmFile,
      // revision,author,dateTime
      "1,foo,2013-01-04\n" +
        "1,bar,2013-01-04\n",
      StandardCharsets.UTF_8);

    AnalysisBuilder analysisBuilder = tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.sources", "src")
        .put("sonar.scm.provider", "xoo")
        // Force reload
        .put("sonar.scm.forceReloadAll", "true")
        .build());

    analysisBuilder.execute();

    ScannerReport.Changesets file1Scm = getChangesets(baseDir, "src/sample.xoo");
    assertThat(file1Scm).isNotNull();

    ScannerReport.Changesets file2Scm = getChangesets(baseDir, SAME_CONTENT_SCM_ON_SERVER_XOO);
    assertThat(file2Scm).isNotNull();
  }

  @Test
  public void configureUsingScmURL() throws IOException, URISyntaxException {

    File baseDir = prepareProject();

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.sources", "src")
        .put("sonar.links.scm_dev", "scm:xoo:foobar")
        .build())
      .execute();

    ScannerReport.Changesets file1Scm = getChangesets(baseDir, "src/sample.xoo");
    assertThat(file1Scm).isNotNull();
  }

  @Test
  public void testAutoDetection() throws IOException, URISyntaxException {

    File baseDir = prepareProject();
    new File(baseDir, ".xoo").createNewFile();

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.sources", "src")
        .build())
      .execute();

    ScannerReport.Changesets file1Scm = getChangesets(baseDir, "src/sample.xoo");
    assertThat(file1Scm).isNotNull();
  }

  private String getNonAsciiAuthor() {
    return Files.contentOf(new File("test-resources/mediumtest/blameAuthor.txt"), StandardCharsets.UTF_8);

  }

  private File prepareProject() throws IOException {
    File baseDir = temp.getRoot();
    File srcDir = new File(baseDir, "src");
    srcDir.mkdir();

    File xooFile1 = new File(srcDir, "sample.xoo");
    FileUtils.write(xooFile1, "Sample xoo\ncontent\n3\n4\n5", StandardCharsets.UTF_8);
    File xooScmFile1 = new File(srcDir, "sample.xoo.scm");
    FileUtils.write(xooScmFile1,
      // revision,author,dateTime
      "1,,2013-01-04\n" +
        "2," + getNonAsciiAuthor() + ",2013-01-04\n" +
        "3,julien,2013-02-03\n" +
        "3,julien,2013-02-03\n" +
        "4,simon,2013-03-04\n",
      StandardCharsets.UTF_8);

    return baseDir;
  }

  @Test
  public void testDisableScmSensor() throws IOException, URISyntaxException {

    File baseDir = prepareProject();

    tester.newAnalysis()
      .properties(ImmutableMap.<String, String>builder()
        .put("sonar.projectBaseDir", baseDir.getAbsolutePath())
        .put("sonar.projectKey", "com.foo.project")
        .put("sonar.sources", "src")
        .put("sonar.scm.disabled", "true")
        .put("sonar.scm.provider", "xoo")
        .put("sonar.cpd.xoo.skip", "true")
        .build())
      .execute();

    ScannerReport.Changesets changesets = getChangesets(baseDir, "src/sample.xoo");
    assertThat(changesets).isNull();
  }

}
