/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * 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.google.idea.blaze.android.cppimpl;

import com.android.tools.ndk.NdkHelper;
import com.google.idea.blaze.base.model.BlazeProjectData;
import com.google.idea.blaze.base.model.primitives.LanguageClass;
import com.google.idea.blaze.base.projectview.ProjectViewSet;
import com.google.idea.blaze.base.settings.BlazeImportSettings;
import com.google.idea.blaze.base.sync.SyncListener;
import com.google.idea.blaze.cpp.BlazeCWorkspace;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.project.Project;
import com.jetbrains.cidr.lang.workspace.OCWorkspace;
import org.jetbrains.annotations.NotNull;

import static com.jetbrains.cidr.lang.OCLanguage.LANGUAGE_SUPPORT_DISABLED;

public final class BlazeNdkSupportEnabler implements SyncListener {
  @Override
  public void onSyncStart(Project project) {
  }

  @Override
  public void onSyncComplete(Project project,
                             BlazeImportSettings importSettings,
                             ProjectViewSet projectViewSet,
                             BlazeProjectData blazeProjectData) {
    boolean enabled = blazeProjectData.workspaceLanguageSettings.isLanguageActive(LanguageClass.C);
    enableCSupportInIde(project, enabled);
  }

  /**
   * If {@code enabled} is true, this method will enable C support in the IDE if it is not already enabled. if {@code enabled} is false this
   * method will clear out any currently stored information in the IDE about C and will disable C support in the IDE, unless support is
   * already disabled.
   *
   * </p>
   * In either case, if the value of enabled matches what the IDE currently does, this method will do nothing.
   *
   * @param project the project to enable or disable c support in.
   * @param enabled if true, turn on C support in the IDE. If false, turn off C support in the IDE.
   */
  private static void enableCSupportInIde(Project project, boolean enabled) {
    BlazeCWorkspace workspace = BlazeCWorkspace.getInstance(project);
    Boolean isCurrentlyEnabled = !LANGUAGE_SUPPORT_DISABLED.get(project, false);
    if (isCurrentlyEnabled != enabled) {
      NdkHelper.disableCppLanguageSupport(project, !enabled);
      rebuildSymbols(project, workspace);
    }
  }

  private static void rebuildSymbols(@NotNull Project project, @NotNull OCWorkspace workspace) {
    ApplicationManager.getApplication().runReadAction(() -> {
      if (project.isDisposed()) {
        return;
      }
      // Notifying BuildSettingsChangeTracker in unitTestMode will leads to a dead lock. See b/23087433 for more information.
      if (!ApplicationManager.getApplication().isUnitTestMode()) {
        workspace.getModificationTrackers().getBuildSettingsChangesTracker().incModificationCount();
      }
    });
  }

  @Override
  public void afterSync(Project project, boolean successful) {
  }
}