/*
 * 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.checks;

import java.util.Iterator;
import org.sonar.api.server.rule.RulesDefinition;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.javascript.tree.impl.JavaScriptTree;
import org.sonar.plugins.javascript.api.tree.Tree;
import org.sonar.plugins.javascript.api.tree.expression.CallExpressionTree;
import org.sonar.plugins.javascript.api.visitors.BaseTreeVisitor;
import org.sonar.squidbridge.annotations.ActivatedByDefault;
import org.sonar.squidbridge.annotations.SqaleConstantRemediation;
import org.sonar.squidbridge.annotations.SqaleSubCharacteristic;

@Rule(
  key = "S1472",
  name = "Function call arguments should not start on new line",
  priority = Priority.CRITICAL,
  tags = {Tags.PITFALL})
@ActivatedByDefault
@SqaleSubCharacteristic(RulesDefinition.SubCharacteristics.INSTRUCTION_RELIABILITY)
@SqaleConstantRemediation("5min")
public class FunctionCallArgumentsOnNewLineCheck extends BaseTreeVisitor {

  private static final String MESSAGE = "Make those call arguments start on line %s";

  @Override
  public void visitCallExpression(CallExpressionTree tree) {

    int calleeLastLine = getLastLine(tree.callee());
    int argumentsLine = ((JavaScriptTree) tree.arguments()).getLine();

    if (calleeLastLine != argumentsLine) {
      getContext().addIssue(this, tree.arguments(), String.format(MESSAGE, calleeLastLine));
    }
    super.visitCallExpression(tree);
  }

  private int getLastLine(Tree tree) {
    JavaScriptTree jsTree = (JavaScriptTree) tree;
    if (jsTree.isLeaf()) {
      return jsTree.getLine();
    } else {
      return getLastLine(getLastElement(jsTree.childrenIterator()));
    }
  }

  public Tree getLastElement(Iterator<Tree> itr) {
    Tree lastElement = itr.next();
    while (itr.hasNext()) {
      lastElement = itr.next();
    }
    return lastElement;
  }

}
