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/*
 * SonarQube JavaScript Plugin
 * Copyright (C) 2011-2022 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.plugins.javascript.utils;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import org.sonar.api.SonarEdition;
import org.sonar.api.SonarProduct;
import org.sonar.api.SonarQubeSide;
import org.sonar.api.SonarRuntime;
import org.sonar.api.rule.RuleKey;
import org.sonar.api.rule.RuleScope;
import org.sonar.api.rule.RuleStatus;
import org.sonar.api.rule.Severity;
import org.sonar.api.rules.RuleType;
import org.sonar.api.server.rule.RulesDefinition;
import org.sonar.api.utils.AnnotationUtils;
import org.sonar.api.utils.Version;
import org.sonar.javascript.checks.CheckList;
import org.sonar.plugins.javascript.JavaScriptLanguage;
import org.sonar.plugins.javascript.JavaScriptProfilesDefinition;
import org.sonar.plugins.javascript.api.EslintBasedCheck;
import org.sonar.plugins.javascript.api.JavaScriptCheck;
import org.sonarsource.analyzer.commons.RuleMetadataLoader;

import static org.sonar.plugins.javascript.rules.JavaScriptRulesDefinition.METADATA_LOCATION;

/**
 * This class is used to generate static json file with rule metadata used by SonarLint Visual Studio because
 * usual Java check classes can not be used. Metadata contain
 * 
 *  usual fields from static json files used by plugin
 *  rule parameter data from annotations on check classes
 *  eslint key
 * 
 * 
 * The file is packaged inside the jar artifact during the build
 */
public class RulesMetadataForSonarLint {

  private final List rules = new ArrayList<>();

  RulesMetadataForSonarLint(String repositoryKey, List> checks) {
    addRules(repositoryKey, checks);
  }

  RulesMetadataForSonarLint() {
    addRules(CheckList.JS_REPOSITORY_KEY, Collections.unmodifiableList(CheckList.getJavaScriptChecks()));
    addRules(CheckList.TS_REPOSITORY_KEY, Collections.unmodifiableList(CheckList.getTypeScriptChecks()));
  }

  void addRules(String repositoryKey, List> ruleClasses) {
    RulesDefinition.Context context = new RulesDefinition.Context();
    RulesDefinition.NewRepository repository = context
      .createRepository(repositoryKey, JavaScriptLanguage.KEY)
      .setName("dummy");


    RuleMetadataLoader ruleMetadataLoader = new RuleMetadataLoader(METADATA_LOCATION, JavaScriptProfilesDefinition.SONAR_WAY_JSON, getSonarlintRuntime());
    ruleMetadataLoader.addRulesByAnnotatedClass(repository, Collections.unmodifiableList(ruleClasses));
    repository.done();

    Map ruleKeyToCheck = ruleClasses.stream()
      .filter(EslintBasedCheck.class::isAssignableFrom)
      .collect(Collectors.toMap(RulesMetadataForSonarLint::ruleKeyFromRuleClass, RulesMetadataForSonarLint::javaScriptCheck));

    context.repository(repositoryKey).rules().stream()
      .map(r -> {
        EslintBasedCheck check = ruleKeyToCheck.get(r.key());
        if (check != null) {
          return Rule.fromSqRule(repositoryKey, r, check.eslintKey(), check.configurations());
        } else {
          return Rule.fromSqRule(repositoryKey, r, null, Collections.emptyList());
        }
      })
      .forEach(rules::add);
  }

  static String ruleKeyFromRuleClass(Class clazz) {
    org.sonar.check.Rule ruleAnnotation = AnnotationUtils.getAnnotation(clazz, org.sonar.check.Rule.class);
    return ruleAnnotation.key();
  }

  static EslintBasedCheck javaScriptCheck(Class clazz) {
    try {
      return (EslintBasedCheck) clazz.getDeclaredConstructor().newInstance();
    } catch (Exception e) {
      throw new IllegalStateException("failed to instantiate " + clazz.getSimpleName(), e);
    }
  }

  void save(Path path) throws IOException {
    Gson gson = new GsonBuilder().setPrettyPrinting().create();
    String json = gson.toJson(rules);
    Files.write(path, json.getBytes(StandardCharsets.UTF_8));
  }

  public static void main(String[] args) {
    if (args.length == 0) {
      throw new IllegalStateException("Missing argument - provide path where to save metadata");
    }
    try {
      new RulesMetadataForSonarLint().save(Paths.get(args[0]));
    } catch (IOException e) {
      e.printStackTrace();
      System.exit(1);
    }
  }

  private static SonarRuntime getSonarlintRuntime() {
    return new SonarRuntime() {
      @Override
      public Version getApiVersion() {
        // we need at least 9.3 to provide OWASP 2021 standards
        return Version.create(9, 3);
      }

      @Override
      public SonarProduct getProduct() {
        return SonarProduct.SONARLINT;
      }

      @Override
      public SonarQubeSide getSonarQubeSide() {
        throw new UnsupportedOperationException("Can only be called in SonarQube");
      }

      @Override
      public SonarEdition getEdition() {
        throw new UnsupportedOperationException("Can only be called in SonarQube");
      }
    };
  }

  static class Rule {
    private String ruleKey;
    private RuleType type;
    private String name;
    private String htmlDescription;
    private String severity = Severity.MAJOR;
    private RuleStatus status = RuleStatus.defaultStatus();
    private Set tags;
    private List params;
    private List