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/*
 * SonarQube JavaScript Plugin
 * Copyright (C) 2011-2025 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 Sonar Source-Available License Version 1, as published by SonarSource SA.
 *
 * 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 Sonar Source-Available License for more details.
 *
 * You should have received a copy of the Sonar Source-Available License
 * along with this program; if not, see https://sonarsource.com/license/ssal/
 */
package org.sonar.plugins.javascript;

import java.io.IOException;
import java.util.Scanner;
import java.util.regex.Pattern;
import org.sonar.api.batch.fs.FilePredicate;
import org.sonar.api.batch.fs.FileSystem;
import org.sonar.plugins.javascript.analysis.YamlSensor;

public class JavaScriptFilePredicate {

  // Helm template directives - for YAML files
  private static final String DIRECTIVE_IN_COMMENT = "#.*\\{\\{";
  private static final String DIRECTIVE_IN_SINGLE_QUOTE = "'[^']*\\{\\{[^']*'";
  private static final String DIRECTIVE_IN_DOUBLE_QUOTE = "\"[^\"]*\\{\\{[^\"]*\"";
  private static final String CODEFRESH_VARIABLES = "\\{\\{[\\w\\s]+}}";
  private static final Pattern HELM_DIRECTIVE_IN_COMMENT_OR_STRING = Pattern.compile(
    "(" +
    String.join(
      "|",
      DIRECTIVE_IN_COMMENT,
      DIRECTIVE_IN_SINGLE_QUOTE,
      DIRECTIVE_IN_DOUBLE_QUOTE,
      CODEFRESH_VARIABLES
    ) +
    ")"
  );

  private JavaScriptFilePredicate() {}

  public static FilePredicate getYamlPredicate(FileSystem fs) {
    return fs
      .predicates()
      .and(fs.predicates().hasLanguage(YamlSensor.LANGUAGE), inputFile -> {
        try (Scanner scanner = new Scanner(inputFile.inputStream(), inputFile.charset().name())) {
          while (scanner.hasNextLine()) {
            String line = scanner.nextLine();
            if (line.contains("{{") && !HELM_DIRECTIVE_IN_COMMENT_OR_STRING.matcher(line).find()) {
              return false;
            }
          }
          return true;
        } catch (IOException e) {
          throw new IllegalStateException(
            String.format("Unable to read file: %s. %s", inputFile.uri(), e.getMessage()),
            e
          );
        }
      });
  }

  public static FilePredicate getJsTsPredicate(FileSystem fs) {
    return fs.predicates().hasLanguages(JavaScriptLanguage.KEY, TypeScriptLanguage.KEY);
  }
}