/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * Created by IntelliJ IDEA.
 * User: dsl
 * Date: 04.06.2002
 * Time: 20:01:43
 * To change template for new class use
 * Code Style | Class Templates options (Tools | IDE Options).
 */
package com.intellij.refactoring;

import com.intellij.openapi.command.CommandProcessor;
import com.intellij.openapi.fileEditor.impl.LoadTextUtil;
import com.intellij.openapi.util.io.FileUtilRt;
import com.intellij.openapi.vfs.VfsUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.testFramework.FileBasedTestCaseHelper;
import org.junit.Test;
import org.junit.runner.RunWith;

import java.io.File;

@RunWith(com.intellij.testFramework.Parameterized.class)
public abstract class LightRefactoringParameterizedTestCase extends LightRefactoringTestCase implements FileBasedTestCaseHelper {

  protected static final String BEFORE_PREFIX = "before";
  protected static final String AFTER_PREFIX = "after";
  protected static final String CONFLICTS_SUFFIX = ".conflicts.txt";

  protected abstract void perform();

  protected abstract String getAfterFile(String fileNameCore);
  protected abstract String getBeforeFile(String fileNameCore);

  @Test
  public void runSingle() throws Throwable {
    final Throwable[] throwables = new Throwable[1];

    final Runnable runnable = new Runnable() {
      @Override
      public void run() {
        try {
          final String filePath = getBeforeFile(myFileSuffix);
          configureByFile(filePath);

          final File testDir = new File(getTestDataPath(), filePath).getParentFile();
          final String afterName = getAfterFile(myFileSuffix);
          final boolean conflictShouldBeFound = !new File(testDir, afterName).exists();
          try {
            perform();
            if (conflictShouldBeFound) {
              fail("Conflict expected.");
            }
          }
          catch (BaseRefactoringProcessor.ConflictsInTestsException exception) {
            if (!conflictShouldBeFound) {
              fail("Conflict not expected");
            } else {
              final File conflicts = new File(testDir, FileUtilRt.getNameWithoutExtension(myFileSuffix) + CONFLICTS_SUFFIX);
              if (!conflicts.exists()) {
                fail("Conflict file " + conflicts.getPath() + " not found");
              }
              final VirtualFile conflictsFile = VfsUtil.findFileByIoFile(conflicts, false);
              assertNotNull(conflictsFile);
              assertEquals(LoadTextUtil.loadText(conflictsFile).toString(), exception.getMessage());
            }
          }

          if (!conflictShouldBeFound) {
            checkResultByFile(getAfterFile(myFileSuffix));
          }
        }
        catch (Throwable e) {
          throwables[0] = e;
        }
      }
    };

    invokeTestRunnable(new Runnable() {
      @Override
      public void run() {
        CommandProcessor.getInstance().executeCommand(getProject(), new Runnable() {
          @Override
          public void run() {
            runnable.run();
          }
        }, "", null);
      }
    });

    if (throwables[0] != null) {
      throw throwables[0];
    }

  }
}