/*
 * Copyright 2000-2012 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.openapi.roots.impl;

import com.intellij.openapi.fileTypes.FileTypeRegistry;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.roots.ContentIterator;
import com.intellij.openapi.roots.ModuleFileIndex;
import com.intellij.openapi.roots.ModuleRootManager;
import com.intellij.openapi.roots.OrderEntry;
import com.intellij.openapi.vfs.VfsUtilCore;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.VirtualFileFilter;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.jps.model.java.JavaModuleSourceRootTypes;
import org.jetbrains.jps.model.module.JpsModuleSourceRootType;

import java.util.List;
import java.util.Set;

public class ModuleFileIndexImpl extends FileIndexBase implements ModuleFileIndex {
  private final Module myModule;
  private final ContentFilter myContentFilter;

  public ModuleFileIndexImpl(Module module, DirectoryIndex directoryIndex) {
    super(directoryIndex, FileTypeRegistry.getInstance(), module.getProject());
    myModule = module;
    myContentFilter = new ContentFilter();
  }

  @Override
  public boolean iterateContent(@NotNull ContentIterator iterator) {
    VirtualFile[] contentRoots = ModuleRootManager.getInstance(myModule).getContentRoots();
    for (VirtualFile contentRoot : contentRoots) {
      VirtualFile parent = contentRoot.getParent();
      if (parent != null) {
        DirectoryInfo parentInfo = myDirectoryIndex.getInfoForFile(parent);
        if (parentInfo.isInProject() && myModule.equals(parentInfo.getModule())) continue; // inner content - skip it
      }

      boolean finished = VfsUtilCore.iterateChildrenRecursively(contentRoot, myContentFilter, iterator);
      if (!finished) return false;
    }

    return true;
  }

  @Override
  public boolean iterateContentUnderDirectory(@NotNull VirtualFile dir, @NotNull ContentIterator iterator) {
    return VfsUtilCore.iterateChildrenRecursively(dir, myContentFilter, iterator);
  }

  @Override
  public boolean isInContent(@NotNull VirtualFile fileOrDir) {
    DirectoryInfo info = getInfoForFileOrDirectory(fileOrDir);
    return info.isInProject() && myModule.equals(info.getModule());
  }

  @Override
  public boolean isInSourceContent(@NotNull VirtualFile fileOrDir) {
    DirectoryInfo info = getInfoForFileOrDirectory(fileOrDir);
    return info.isInModuleSource() && myModule.equals(info.getModule());
  }

  @Override
  @NotNull
  public List<OrderEntry> getOrderEntriesForFile(@NotNull VirtualFile fileOrDir) {
    return myDirectoryIndex.findAllOrderEntriesWithOwnerModule(getInfoForFileOrDirectory(fileOrDir), myModule);
  }

  @Override
  public OrderEntry getOrderEntryForFile(@NotNull VirtualFile fileOrDir) {
    return myDirectoryIndex.findOrderEntryWithOwnerModule(getInfoForFileOrDirectory(fileOrDir), myModule);
  }

  @Override
  public boolean isInTestSourceContent(@NotNull VirtualFile fileOrDir) {
    DirectoryInfo info = getInfoForFileOrDirectory(fileOrDir);
    return info.isInModuleSource() && myModule.equals(info.getModule())
           && JavaModuleSourceRootTypes.isTestSourceOrResource(myDirectoryIndex.getSourceRootType(info));
  }

  @Override
  public boolean isUnderSourceRootOfType(@NotNull VirtualFile fileOrDir, @NotNull Set<? extends JpsModuleSourceRootType<?>> rootTypes) {
    DirectoryInfo info = getInfoForFileOrDirectory(fileOrDir);
    return info.isInModuleSource() && myModule.equals(info.getModule()) && rootTypes.contains(myDirectoryIndex.getSourceRootType(info));
  }

  private class ContentFilter implements VirtualFileFilter {
    @Override
    public boolean accept(@NotNull VirtualFile file) {
      if (file.isDirectory()) {
        DirectoryInfo info = myDirectoryIndex.getInfoForFile(file);
        return info.isInProject() && myModule.equals(info.getModule());
      }
      else {
        return !myFileTypeRegistry.isFileIgnored(file);
      }
    }
  }
}