/*
 * 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.
 */

/**
 * @author cdr
 */
package com.intellij.openapi.module;

import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ContentEntry;
import com.intellij.openapi.roots.ModifiableRootModel;
import com.intellij.openapi.roots.ModuleRootManager;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.util.CachedValueProvider;
import com.intellij.psi.util.CachedValuesManager;
import com.intellij.psi.util.ParameterizedCachedValue;
import com.intellij.psi.util.ParameterizedCachedValueProvider;
import com.intellij.util.containers.MultiMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.jps.model.module.JpsModuleSourceRootType;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class ModuleUtil extends ModuleUtilCore {
  private static final ParameterizedCachedValueProvider<MultiMap<ModuleType<?>,Module>,Project> MODULE_BY_TYPE_VALUE_PROVIDER =
    new ParameterizedCachedValueProvider<MultiMap<ModuleType<?>, Module>, Project>() {
      @Nullable
      @Override
      public CachedValueProvider.Result<MultiMap<ModuleType<?>, Module>> compute(Project param) {
        MultiMap<ModuleType<?>, Module> map = new MultiMap<ModuleType<?>, Module>();
        for (Module module : ModuleManager.getInstance(param).getModules()) {
          map.putValue(ModuleType.get(module), module);
        }
        return CachedValueProvider.Result.createSingleDependency(map, ProjectRootManager.getInstance(param));
      }
    };
  private static final Key<ParameterizedCachedValue<MultiMap<ModuleType<?>, Module>, Project>> MODULES_BY_TYPE_KEY = Key.create("MODULES_BY_TYPE");

  private ModuleUtil() {}

  /**
   * @deprecated use ModuleManager#getModuleDependentModules(com.intellij.openapi.module.Module) instead
   */
  @Nullable
  public static Module getParentModuleOfType(ModuleType expectedModuleType, Module module) {
    if (module == null) return null;
    if (expectedModuleType.equals(ModuleType.get(module))) return module;
    final List<Module> parents = getParentModulesOfType(expectedModuleType, module);
    return parents.isEmpty() ? null : parents.get(0);
  }

  /**
   * @deprecated use ModuleManager#getModuleDependentModules(com.intellij.openapi.module.Module) instead
   */
  @NotNull
  public static List<Module> getParentModulesOfType(ModuleType expectedModuleType, Module module) {
    final List<Module> parents = ModuleManager.getInstance(module.getProject()).getModuleDependentModules(module);
    ArrayList<Module> modules = new ArrayList<Module>();
    for (Module parent : parents) {
      if (expectedModuleType.equals(ModuleType.get(parent))) {
        modules.add(parent);
      }
    }
    return modules;
  }

  @NotNull
  public static Collection<Module> getModulesOfType(@NotNull Project project, @NotNull ModuleType<?> moduleType) {
    return CachedValuesManager.getManager(project).getParameterizedCachedValue(project, MODULES_BY_TYPE_KEY, MODULE_BY_TYPE_VALUE_PROVIDER,
                                                                               false, project).get(moduleType);
  }

  public static boolean hasModulesOfType(@NotNull Project project, @NotNull ModuleType<?> module) {
    return !getModulesOfType(project, module).isEmpty();
  }

  public static boolean isSupportedRootType(Project project, JpsModuleSourceRootType sourceRootType) {
    Module[] modules = ModuleManager.getInstance(project).getModules();
    for (Module module : modules) {
      if (ModuleType.get(module).isSupportedRootType(sourceRootType)) {
        return true;
      }
    }
    return modules.length == 0;
  }

  @Nullable
  public static ModuleType getModuleType(@NotNull Module module) {
    String type = module.getOptionValue(Module.ELEMENT_TYPE);
    return ModuleTypeManager.getInstance().findByID(type);
  }
}