/*
 * Copyright 2013-2016 Sergey Ignatov, Alexander Zolotov, Florin Patan
 *
 * 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.goide.project;

import com.goide.GoConstants;
import com.goide.GoModuleType;
import com.goide.sdk.GoSdkType;
import com.intellij.ide.util.importProject.ModuleDescriptor;
import com.intellij.ide.util.importProject.ProjectDescriptor;
import com.intellij.ide.util.projectWizard.ModuleWizardStep;
import com.intellij.ide.util.projectWizard.ProjectJdkForModuleStep;
import com.intellij.ide.util.projectWizard.importSources.DetectedProjectRoot;
import com.intellij.ide.util.projectWizard.importSources.ProjectFromSourcesBuilder;
import com.intellij.ide.util.projectWizard.importSources.ProjectStructureDetector;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;

import javax.swing.*;
import java.io.File;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

public class GoProjectStructureDetector extends ProjectStructureDetector {
  @NotNull
  @Override
  public DirectoryProcessingResult detectRoots(@NotNull File dir,
                                               @NotNull File[] children,
                                               @NotNull File base,
                                               @NotNull List<DetectedProjectRoot> result) {
    Pattern pattern = Pattern.compile(".*\\.go");
    List<File> filesByMask = FileUtil.findFilesByMask(pattern, base);
    if (!filesByMask.isEmpty()) {
      result.add(new DetectedProjectRoot(dir) {
        @NotNull
        @Override
        public String getRootTypeName() {
          return GoConstants.GO;
        }
      });
    }
    return DirectoryProcessingResult.SKIP_CHILDREN;
  }

  @Override
  public void setupProjectStructure(@NotNull Collection<DetectedProjectRoot> roots,
                                    @NotNull ProjectDescriptor projectDescriptor,
                                    @NotNull ProjectFromSourcesBuilder builder) {
    if (!roots.isEmpty() && !builder.hasRootsFromOtherDetectors(this)) {
      if (projectDescriptor.getModules().isEmpty()) {
        projectDescriptor.setModules(roots.stream()
                                       .map(root -> new ModuleDescriptor(root.getDirectory(), GoModuleType.getInstance(),
                                                                         ContainerUtil.emptyList())).collect(Collectors.toList()));
      }
    }
  }

  @NotNull
  @Override
  public List<ModuleWizardStep> createWizardSteps(@NotNull ProjectFromSourcesBuilder builder,
                                                  ProjectDescriptor projectDescriptor,
                                                  Icon stepIcon) {
    ProjectJdkForModuleStep projectJdkForModuleStep = new ProjectJdkForModuleStep(builder.getContext(), GoSdkType.getInstance());
    return Collections.singletonList(projectJdkForModuleStep);
  }
}