/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * 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.android.tools.idea.gradle.service;

import com.android.tools.idea.gradle.AndroidProjectKeys;
import com.android.tools.idea.gradle.GradleSyncState;
import com.android.tools.idea.gradle.IdeaJavaProject;
import com.android.tools.idea.gradle.customizer.ModuleCustomizer;
import com.android.tools.idea.gradle.customizer.java.CompilerOutputModuleCustomizer;
import com.android.tools.idea.gradle.customizer.java.ContentRootModuleCustomizer;
import com.android.tools.idea.gradle.customizer.java.DependenciesModuleCustomizer;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.intellij.openapi.application.RunResult;
import com.intellij.openapi.command.WriteCommandAction;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.externalSystem.model.DataNode;
import com.intellij.openapi.externalSystem.model.Key;
import com.intellij.openapi.externalSystem.service.project.manage.ProjectDataService;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleManager;
import com.intellij.openapi.project.Project;
import org.jetbrains.annotations.NotNull;

import java.util.Collection;
import java.util.List;
import java.util.Map;

public class JavaProjectDataService implements ProjectDataService<IdeaJavaProject, Void> {
  private static final Logger LOG = Logger.getInstance(JavaProjectDataService.class);

  private final List<ModuleCustomizer<IdeaJavaProject>> myCustomizers =
    ImmutableList.of(new ContentRootModuleCustomizer(), new DependenciesModuleCustomizer(), new CompilerOutputModuleCustomizer());

  @Override
  @NotNull
  public Key<IdeaJavaProject> getTargetDataKey() {
    return AndroidProjectKeys.IDE_JAVA_PROJECT;
  }

  @Override
  public void importData(@NotNull Collection<DataNode<IdeaJavaProject>> toImport, @NotNull Project project, boolean synchronous) {
    if (!toImport.isEmpty()) {
      try {
        doImport(toImport, project);
      } catch (Throwable e) {
        LOG.error(String.format("Failed to set up Java modules in project '%1$s'", project.getName()), e);
        GradleSyncState.getInstance(project).syncFailed(e.getMessage());
      }
    }
  }

  private void doImport(final Collection<DataNode<IdeaJavaProject>> toImport, final Project project) throws Throwable {
    RunResult result = new WriteCommandAction.Simple(project) {
      @Override
      protected void run() throws Throwable {
        if (!project.isDisposed()) {
          ModuleManager moduleManager = ModuleManager.getInstance(project);
          Map<String, IdeaJavaProject> gradleProjectsByName = indexByModuleName(toImport);
          for (Module module : moduleManager.getModules()) {
            IdeaJavaProject javaProject = gradleProjectsByName.get(module.getName());
            if (javaProject != null) {
              customizeModule(module, javaProject);
            }
          }
        }
      }
    }.execute();
    Throwable error = result.getThrowable();
    if (error != null) {
      throw error;
    }
  }

  @NotNull
  private static Map<String, IdeaJavaProject> indexByModuleName(@NotNull Collection<DataNode<IdeaJavaProject>> dataNodes) {
    Map<String, IdeaJavaProject> javaProjectsByModuleName = Maps.newHashMap();
    for (DataNode<IdeaJavaProject> d : dataNodes) {
      IdeaJavaProject javaProject = d.getData();
      javaProjectsByModuleName.put(javaProject.getModuleName(), javaProject);
    }
    return javaProjectsByModuleName;
  }

  private void customizeModule(@NotNull Module module, @NotNull IdeaJavaProject javaProject) {
    for (ModuleCustomizer<IdeaJavaProject> customizer : myCustomizers) {
      customizer.customizeModule(module, module.getProject(), javaProject);
    }
  }

  @Override
  public void removeData(@NotNull Collection<? extends Void> toRemove, @NotNull Project project, boolean synchronous) {
  }
}