/*
 * 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.xoo.rule;

import java.util.Objects;
import java.util.stream.StreamSupport;
import org.sonar.api.batch.fs.FilePredicates;
import org.sonar.api.batch.fs.FileSystem;
import org.sonar.api.batch.fs.InputFile.Type;
import org.sonar.api.batch.sensor.Sensor;
import org.sonar.api.batch.sensor.SensorContext;
import org.sonar.api.batch.sensor.SensorDescriptor;
import org.sonar.api.batch.sensor.issue.NewIssue;
import org.sonar.api.rule.RuleKey;

public class OneIssuePerDirectorySensor implements Sensor {

  public static final String RULE_KEY = "OneIssuePerDirectory";

  @Override
  public void describe(SensorDescriptor descriptor) {
    descriptor
      .name("One Issue Per Directory")
      .createIssuesForRuleRepositories(XooRulesDefinition.XOO_REPOSITORY);
  }

  @Override
  public void execute(SensorContext context) {
    analyse(context);
  }

  private static void analyse(SensorContext context) {
    FileSystem fs = context.fileSystem();
    FilePredicates p = fs.predicates();
    RuleKey ruleKey = RuleKey.of(XooRulesDefinition.XOO_REPOSITORY, RULE_KEY);
    StreamSupport.stream(fs.inputFiles(p.hasType(Type.MAIN)).spliterator(), false)
      .map(file -> fs.inputDir(file.file().getParentFile()))
      .filter(Objects::nonNull)
      .distinct()
      .forEach(inputDir -> {
        NewIssue newIssue = context.newIssue();
        newIssue
          .forRule(ruleKey)
          .at(newIssue.newLocation()
            .on(inputDir)
            .message("This issue is generated for any non-empty directory"))
          .save();
      });
  }
}
