/*
 * SonarQube JavaScript Plugin
 * Copyright (C) 2011-2016 SonarSource SA
 * mailto:contact 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.javascript.metrics;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Sets;
import java.util.List;
import java.util.Set;
import org.sonar.javascript.tree.impl.lexical.InternalSyntaxToken;
import org.sonar.plugins.javascript.api.visitors.SubscriptionVisitor;
import org.sonar.plugins.javascript.api.tree.Tree;
import org.sonar.plugins.javascript.api.tree.Tree.Kind;
import org.sonar.plugins.javascript.api.tree.lexical.SyntaxToken;

/**
 * Visitor that computes the number of lines of code of a file.
 */
public class LineVisitor extends SubscriptionVisitor {

  private Set<Integer> lines = Sets.newHashSet();
  private int lastLine = 0;

  public LineVisitor(Tree tree) {
    scanTree(tree);
  }

  @Override
  public List<Kind> nodesToVisit() {
    return ImmutableList.of(Kind.TOKEN);
  }

  @Override
  public void visitNode(Tree tree) {
    SyntaxToken token = (SyntaxToken) tree;
    if (!((InternalSyntaxToken) token).isEOF()) {
      lines.add(token.line());

    } else {
      lastLine = token.line();
    }
  }

  public int getLinesOfCodeNumber() {
    return lines.size();
  }

  public Set<Integer> getLinesOfCode() {
    return lines;
  }

  public int getLinesNumber() {
    return lastLine;
  }
}
