/*
 * 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.
 */
package com.intellij.codeInsight.daemon;

import com.intellij.codeHighlighting.HighlightDisplayLevel;
import com.intellij.codeHighlighting.Pass;
import com.intellij.codeInsight.CodeInsightTestCase;
import com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerEx;
import com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerImpl;
import com.intellij.codeInsight.daemon.impl.HighlightInfo;
import com.intellij.codeInsight.daemon.quickFix.LightQuickFixTestCase;
import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.codeInsight.intention.IntentionManager;
import com.intellij.codeInsight.intention.impl.ShowIntentionActionsHandler;
import com.intellij.codeInspection.InspectionProfileEntry;
import com.intellij.codeInspection.InspectionToolProvider;
import com.intellij.codeInspection.LocalInspectionTool;
import com.intellij.codeInspection.ModifiableModel;
import com.intellij.codeInspection.ex.*;
import com.intellij.ide.highlighter.JavaFileType;
import com.intellij.ide.startup.StartupManagerEx;
import com.intellij.ide.startup.impl.StartupManagerImpl;
import com.intellij.lang.ExternalAnnotatorsFilter;
import com.intellij.lang.LanguageAnnotators;
import com.intellij.lang.StdLanguages;
import com.intellij.lang.annotation.HighlightSeverity;
import com.intellij.lang.injection.InjectedLanguageManager;
import com.intellij.lang.java.JavaLanguage;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.Result;
import com.intellij.openapi.application.ex.PathManagerEx;
import com.intellij.openapi.command.WriteCommandAction;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.project.DumbService;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ModuleRootManager;
import com.intellij.openapi.startup.StartupManager;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.Disposer;
import com.intellij.openapi.util.Pair;
import com.intellij.openapi.util.TextRange;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.vfs.*;
import com.intellij.profile.codeInspection.InspectionProfileManager;
import com.intellij.profile.codeInspection.InspectionProjectProfileManager;
import com.intellij.psi.*;
import com.intellij.psi.impl.JavaPsiFacadeEx;
import com.intellij.psi.impl.cache.CacheManager;
import com.intellij.psi.impl.search.IndexPatternBuilder;
import com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry;
import com.intellij.psi.impl.source.tree.TreeElement;
import com.intellij.psi.impl.source.tree.TreeUtil;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.search.UsageSearchContext;
import com.intellij.psi.xml.XmlFileNSInfoProvider;
import com.intellij.testFramework.ExpectedHighlightingData;
import com.intellij.testFramework.FileTreeAccessFilter;
import com.intellij.testFramework.HighlightTestInfo;
import com.intellij.testFramework.LightPlatformTestCase;
import com.intellij.testFramework.fixtures.impl.CodeInsightTestFixtureImpl;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.ui.UIUtil;
import com.intellij.xml.XmlSchemaProvider;
import gnu.trove.THashMap;
import gnu.trove.TIntArrayList;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.IOException;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;

public abstract class DaemonAnalyzerTestCase extends CodeInsightTestCase {
  private final Map<String, InspectionToolWrapper> myAvailableTools = new THashMap<String, InspectionToolWrapper>();
  private final FileTreeAccessFilter myFileTreeAccessFilter = new FileTreeAccessFilter();

  @Override
  protected boolean isRunInWriteAction() {
    return false;
  }

  @Override
  protected void setUp() throws Exception {
    super.setUp();

    final LocalInspectionTool[] tools = configureLocalInspectionTools();
    for (LocalInspectionTool tool : tools) {
      enableInspectionTool(tool);
    }

    final InspectionProfileImpl profile = new InspectionProfileImpl(LightPlatformTestCase.PROFILE) {
      @Override
      @NotNull
      public ModifiableModel getModifiableModel() {
        mySource = this;
        return this;
      }

      @Override
      @NotNull
      public InspectionToolWrapper[] getInspectionTools(PsiElement element) {
        Collection<InspectionToolWrapper> values = myAvailableTools.values();
        return values.toArray(new InspectionToolWrapper[values.size()]);
      }

      @NotNull
      @Override
      public List<Tools> getAllEnabledInspectionTools(Project project) {
        List<Tools> result = new ArrayList<Tools>();
        for (InspectionToolWrapper toolWrapper : getInspectionTools(null)) {
          result.add(new ToolsImpl(toolWrapper, toolWrapper.getDefaultLevel(), true));
        }
        return result;
      }

      @Override
      public boolean isToolEnabled(HighlightDisplayKey key, PsiElement element) {
        return key != null && myAvailableTools.containsKey(key.toString());
      }

      @Override
      public HighlightDisplayLevel getErrorLevel(@NotNull HighlightDisplayKey key, PsiElement element) {
        final InspectionToolWrapper localInspectionTool = myAvailableTools.get(key.toString());
        return localInspectionTool != null ? localInspectionTool.getDefaultLevel() : HighlightDisplayLevel.WARNING;
      }

      @Override
      public InspectionToolWrapper getInspectionTool(@NotNull String shortName, @NotNull PsiElement element) {
        return myAvailableTools.get(shortName);
      }
    };
    final InspectionProfileManager inspectionProfileManager = InspectionProfileManager.getInstance();
    inspectionProfileManager.addProfile(profile);
    inspectionProfileManager.setRootProfile(LightPlatformTestCase.PROFILE);
    Disposer.register(getProject(), new Disposable() {
      @Override
      public void dispose() {
        inspectionProfileManager.deleteProfile(LightPlatformTestCase.PROFILE);
      }
    });
    InspectionProjectProfileManager.getInstance(getProject()).updateProfile(profile);
    InspectionProjectProfileManager.getInstance(getProject()).setProjectProfile(profile.getName());
    DaemonCodeAnalyzerImpl daemonCodeAnalyzer = (DaemonCodeAnalyzerImpl)DaemonCodeAnalyzer.getInstance(getProject());
    daemonCodeAnalyzer.prepareForTest();
    final StartupManagerImpl startupManager = (StartupManagerImpl)StartupManagerEx.getInstanceEx(getProject());
    startupManager.runStartupActivities();
    startupManager.startCacheUpdate();
    startupManager.runPostStartupActivities();
    DaemonCodeAnalyzerSettings.getInstance().setImportHintEnabled(false);

    if (isPerformanceTest()) {
      IntentionManager.getInstance().getAvailableIntentionActions();  // hack to avoid slowdowns in PyExtensionFactory
      PathManagerEx.getTestDataPath(); // to cache stuff
      ReferenceProvidersRegistry.getInstance(); // pre-load tons of classes
      InjectedLanguageManager.getInstance(getProject()); // zillion of Dom Sem classes
      LanguageAnnotators.INSTANCE.allForLanguage(JavaLanguage.INSTANCE); // pile of annotator classes loads
      LanguageAnnotators.INSTANCE.allForLanguage(StdLanguages.XML);
      ProblemHighlightFilter.EP_NAME.getExtensions();
      Extensions.getExtensions(ImplicitUsageProvider.EP_NAME);
      Extensions.getExtensions(XmlSchemaProvider.EP_NAME);
      Extensions.getExtensions(XmlFileNSInfoProvider.EP_NAME);
      Extensions.getExtensions(ExternalAnnotatorsFilter.EXTENSION_POINT_NAME);
      Extensions.getExtensions(IndexPatternBuilder.EP_NAME);
    }
  }

  @Override
  protected void tearDown() throws Exception {
    ((StartupManagerImpl)StartupManager.getInstance(getProject())).checkCleared();
    ((DaemonCodeAnalyzerImpl)DaemonCodeAnalyzer.getInstance(getProject())).cleanupAfterTest();
    super.tearDown();
    //((VirtualFilePointerManagerImpl)VirtualFilePointerManager.getInstance()).assertPointersDisposed();
  }

  protected void enableInspectionTool(@NotNull InspectionProfileEntry tool) {
    InspectionToolWrapper toolWrapper = InspectionToolRegistrar.wrapTool(tool);
    LightPlatformTestCase.enableInspectionTool(myAvailableTools, toolWrapper);
  }

  protected void enableInspectionToolsFromProvider(InspectionToolProvider toolProvider){
    try {
      for(Class c:toolProvider.getInspectionClasses()) {
        enableInspectionTool((LocalInspectionTool)c.newInstance());
      }
    }
    catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  protected void disableInspectionTool(String shortName){
    myAvailableTools.remove(shortName);
  }

  protected LocalInspectionTool[] configureLocalInspectionTools() {
    return LocalInspectionTool.EMPTY_ARRAY;
  }

  protected static LocalInspectionTool[] createLocalInspectionTools(final InspectionToolProvider... provider) {
    final ArrayList<LocalInspectionTool> result = new ArrayList<LocalInspectionTool>();
    for (InspectionToolProvider toolProvider : provider) {
      for (Class aClass : toolProvider.getInspectionClasses()) {
        try {
          final Object tool = aClass.newInstance();
          assertTrue(tool instanceof LocalInspectionTool);
          result.add((LocalInspectionTool)tool);
        }
        catch (Exception e) {
          LOG.error(e);
        }
      }
    }
    return result.toArray(new LocalInspectionTool[result.size()]);
  }

  protected void doTest(@NonNls @NotNull String filePath, boolean checkWarnings, boolean checkInfos, boolean checkWeakWarnings) throws Exception {
    configureByFile(filePath);
    doDoTest(checkWarnings, checkInfos, checkWeakWarnings);
  }

  protected void doTest(@NonNls @NotNull String filePath, boolean checkWarnings, boolean checkInfos) throws Exception {
    doTest(filePath, checkWarnings, checkInfos, false);
  }

  protected void doTest(@NonNls @NotNull String filePath, @NonNls String projectRoot, boolean checkWarnings, boolean checkInfos) throws Exception {
    configureByFile(filePath, projectRoot);
    doDoTest(checkWarnings, checkInfos);
  }

  @NotNull
  @SuppressWarnings("TestMethodWithIncorrectSignature")
  protected HighlightTestInfo testFile(@NonNls @NotNull String... filePath) {
    return new HighlightTestInfo(getTestRootDisposable(), filePath) {
      @Override
      public HighlightTestInfo doTest() {
        try { configureByFiles(projectRoot, filePaths); }
        catch (Exception e) { throw new RuntimeException(e); }
        ExpectedHighlightingData data = new ExpectedHighlightingData(myEditor.getDocument(), checkWarnings, checkWeakWarnings, checkInfos, myFile);
        if (checkSymbolNames) data.checkSymbolNames();
        checkHighlighting(data);
        return this;
      }
    };
  }

  protected void doTest(@NotNull VirtualFile vFile, boolean checkWarnings, boolean checkInfos) throws Exception {
    doTest(new VirtualFile[] { vFile }, checkWarnings, checkInfos );
  }

  protected void doTest(@NotNull VirtualFile[] vFile, boolean checkWarnings, boolean checkInfos) throws Exception {
    configureByFiles(null, vFile);
    doDoTest(checkWarnings, checkInfos);
  }

  protected void doTest(boolean checkWarnings, boolean checkInfos, String ... files) throws Exception {
    configureByFiles(null, files);
    doDoTest(checkWarnings, checkInfos);
  }

  @NotNull
  protected Collection<HighlightInfo> doDoTest(boolean checkWarnings, boolean checkInfos) {
    return doDoTest(checkWarnings, checkInfos, false);
  }

  protected Collection<HighlightInfo> doDoTest(final boolean checkWarnings, final boolean checkInfos, final boolean checkWeakWarnings) {
    return ContainerUtil.filter(
      checkHighlighting(new ExpectedHighlightingData(myEditor.getDocument(), checkWarnings, checkWeakWarnings, checkInfos, myFile)),
      new Condition<HighlightInfo>() {
        @Override
        public boolean value(HighlightInfo info) {
          return (info.getSeverity() == HighlightSeverity.INFORMATION) && checkInfos ||
                 (info.getSeverity() == HighlightSeverity.WARNING) && checkWarnings ||
                 (info.getSeverity() == HighlightSeverity.WEAK_WARNING) && checkWeakWarnings ||
                  info.getSeverity().compareTo(HighlightSeverity.WARNING) > 0;
        }
      });
  }

  @NotNull
  protected Collection<HighlightInfo> checkHighlighting(@NotNull final ExpectedHighlightingData data) {
    data.init();
    PsiDocumentManager.getInstance(myProject).commitAllDocuments();

    //to load text
    ApplicationManager.getApplication().runWriteAction(new Runnable() {
      @Override
      public void run() {
        TreeUtil.clearCaches((TreeElement)myFile.getNode());
      }
    });


    //to initialize caches
    if (!DumbService.isDumb(getProject())) {
      CacheManager.SERVICE.getInstance(myProject).getFilesWithWord("XXX", UsageSearchContext.IN_COMMENTS, GlobalSearchScope.allScope(myProject), true);
    }
    final JavaPsiFacadeEx facade = getJavaFacade();
    if (facade != null) {
      facade.setAssertOnFileLoadingFilter(myFileTreeAccessFilter, myTestRootDisposable); // check repository work
    }

    try {
      Collection<HighlightInfo> infos = doHighlighting();

      String text = myEditor.getDocument().getText();
      data.checkLineMarkers(DaemonCodeAnalyzerImpl.getLineMarkers(getDocument(getFile()), getProject()), text);
      data.checkResult(infos, text);
      return infos;
    }
    finally {
      if (facade != null) {
        facade.setAssertOnFileLoadingFilter(VirtualFileFilter.NONE, myTestRootDisposable);
      }
    }
  }

  public void allowTreeAccessForFile(@NotNull VirtualFile file) {
    myFileTreeAccessFilter.allowTreeAccessForFile(file);
  }

  @NotNull
  protected List<HighlightInfo> highlightErrors() {
    return doHighlighting(HighlightSeverity.ERROR);
  }

  @NotNull
  protected List<HighlightInfo> doHighlighting(@NotNull HighlightSeverity minSeverity) {
    return filter(doHighlighting(), minSeverity);
  }

  @NotNull
  protected List<HighlightInfo> doHighlighting() {
    PsiDocumentManager.getInstance(myProject).commitAllDocuments();

    TIntArrayList toIgnore = new TIntArrayList();
    if (!doTestLineMarkers()) {
      toIgnore.add(Pass.UPDATE_OVERRIDEN_MARKERS);
      toIgnore.add(Pass.VISIBLE_LINE_MARKERS);
      toIgnore.add(Pass.LINE_MARKERS);
    }

    if (!doExternalValidation()) {
      toIgnore.add(Pass.EXTERNAL_TOOLS);
    }
    if (forceExternalValidation()) {
      toIgnore.add(Pass.LINE_MARKERS);
      toIgnore.add(Pass.LOCAL_INSPECTIONS);
      toIgnore.add(Pass.WHOLE_FILE_LOCAL_INSPECTIONS);
      toIgnore.add(Pass.POPUP_HINTS);
      toIgnore.add(Pass.POST_UPDATE_ALL);
      toIgnore.add(Pass.UPDATE_ALL);
      toIgnore.add(Pass.UPDATE_OVERRIDEN_MARKERS);
      toIgnore.add(Pass.VISIBLE_LINE_MARKERS);
    }

    boolean canChange = canChangeDocumentDuringHighlighting();
    List<HighlightInfo> infos = CodeInsightTestFixtureImpl.instantiateAndRun(getFile(), getEditor(), toIgnore.toNativeArray(), canChange);

    if (!canChange) {
      Document document = getDocument(getFile());
      DaemonCodeAnalyzerEx daemonCodeAnalyzer = DaemonCodeAnalyzerEx.getInstanceEx(myProject);
      daemonCodeAnalyzer.getFileStatusMap().assertAllDirtyScopesAreNull(document);
    }

    return infos;
  }

  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.METHOD, ElementType.TYPE})
  public @interface CanChangeDocumentDuringHighlighting {}

  private boolean canChangeDocumentDuringHighlighting() {
    return annotatedWith(CanChangeDocumentDuringHighlighting.class);
  }

  @NotNull
  public static List<HighlightInfo> filter(@NotNull List<HighlightInfo> infos, @NotNull HighlightSeverity minSeverity) {
    ArrayList<HighlightInfo> result = new ArrayList<HighlightInfo>();
    for (final HighlightInfo info : infos) {
      if (info.getSeverity().compareTo(minSeverity) >= 0) result.add(info);
    }
    return result;
  }

  protected boolean doTestLineMarkers() {
    return false;
  }

  protected boolean doExternalValidation() {
    return true;
  }

  protected boolean forceExternalValidation() {
    return false;
  }

  protected static void findAndInvokeIntentionAction(@NotNull Collection<HighlightInfo> infos, @NotNull String intentionActionName, @NotNull Editor editor,
                                                     @NotNull PsiFile file) throws IncorrectOperationException {
    IntentionAction intentionAction = findIntentionAction(infos, intentionActionName, editor, file);

    assertNotNull(intentionActionName, intentionAction);
    assertTrue(ShowIntentionActionsHandler.chooseActionAndInvoke(file, editor, intentionAction, intentionActionName));
    UIUtil.dispatchAllInvocationEvents();
  }

  protected static IntentionAction findIntentionAction(@NotNull Collection<HighlightInfo> infos, @NotNull String intentionActionName, @NotNull Editor editor,
                                                       @NotNull PsiFile file) {
    List<IntentionAction> actions = LightQuickFixTestCase.getAvailableActions(editor, file);
    IntentionAction intentionAction = LightQuickFixTestCase.findActionWithText(actions, intentionActionName);

    if (intentionAction == null) {
      final List<IntentionAction> availableActions = new ArrayList<IntentionAction>();

      for (HighlightInfo info :infos) {
        if (info.quickFixActionRanges != null) {
          for (Pair<HighlightInfo.IntentionActionDescriptor, TextRange> pair : info.quickFixActionRanges) {
            IntentionAction action = pair.first.getAction();
            if (action.isAvailable(file.getProject(), editor, file)) availableActions.add(action);
          }
        }
      }

      intentionAction = LightQuickFixTestCase.findActionWithText(
        availableActions,
        intentionActionName
      );
    }
    return intentionAction;
  }

  public void checkHighlighting(Editor editor, boolean checkWarnings, boolean checkInfos) {
    setActiveEditor(editor);
    doDoTest(checkWarnings, checkInfos);
  }

  public PsiClass createClass(String text) throws IOException {
    return createClass(myModule, text);
  }

  protected PsiClass createClass(final Module module, final String text) throws IOException {
    return new WriteCommandAction<PsiClass>(getProject()) {
      @Override
      protected void run(Result<PsiClass> result) throws Throwable {
        final PsiFileFactory factory = PsiFileFactory.getInstance(getProject());
        final PsiJavaFile javaFile = (PsiJavaFile)factory.createFileFromText("a.java", JavaFileType.INSTANCE, text);
        final String qname = javaFile.getClasses()[0].getQualifiedName();
        assertNotNull(qname);
        final VirtualFile[] files = ModuleRootManager.getInstance(module).getSourceRoots();
        File dir;
        if (files.length > 0) {
          dir = VfsUtilCore.virtualToIoFile(files[0]);
        }
        else {
          dir = createTempDirectory();
          VirtualFile vDir =
            LocalFileSystem.getInstance().refreshAndFindFileByPath(dir.getCanonicalPath().replace(File.separatorChar, '/'));
          addSourceContentToRoots(module, vDir);
        }

        File file = new File(dir, qname.replace('.', '/') + ".java");
        FileUtil.createIfDoesntExist(file);
        VirtualFile vFile = LocalFileSystem.getInstance().refreshAndFindFileByPath(file.getCanonicalPath().replace(File.separatorChar, '/'));
        assertNotNull(vFile);
        VfsUtil.saveText(vFile, text);
        PsiJavaFile psiFile = (PsiJavaFile)myPsiManager.findFile(vFile);
        assertNotNull(psiFile);
        PsiClass psiClass = psiFile.getClasses()[0];
        result.setResult(psiClass);

      }
    }.execute().throwException().getResultObject();
  }
}