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/*
 * SonarQube Java
 * Copyright (C) 2012-2018 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.java.checks;

import com.google.common.collect.ImmutableList;
import java.util.List;
import org.sonar.check.Rule;
import org.sonar.java.checks.methods.AbstractMethodDetection;
import org.sonar.java.matcher.MethodMatcher;
import org.sonar.java.matcher.TypeCriteria;
import org.sonar.java.model.ExpressionUtils;
import org.sonar.plugins.java.api.tree.MethodInvocationTree;
import org.sonar.plugins.java.api.tree.MethodTree;
import org.sonar.plugins.java.api.tree.Tree;

@Rule(key = "S1217")
public class ThreadRunCheck extends AbstractMethodDetection {
  private static final MethodMatcher THREAD_RUN_METHOD_MATCHER = MethodMatcher.create().typeDefinition(TypeCriteria.subtypeOf("java.lang.Thread")).name("run")
    .withAnyParameters();

  @Override
  protected List getMethodInvocationMatchers() {
    return ImmutableList.of(THREAD_RUN_METHOD_MATCHER);
  }

  @Override
  protected void onMethodInvocationFound(MethodInvocationTree mit) {
    Tree parent = mit.parent();
    while (parent != null && !parent.is(Tree.Kind.METHOD)) {
      parent = parent.parent();
    }
    if (parent != null && THREAD_RUN_METHOD_MATCHER.matches((MethodTree) parent)) {
      return;
    }
    reportIssue(ExpressionUtils.methodName(mit), "Call the method Thread.start() to execute the content of the run() method in a dedicated thread.");
  }

}