/*
    * Copyright 2017 LINE Corporation
    *
    * LINE Corporation licenses this file to you 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:
    *
    *   https://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.linecorp.centraldogma.server.internal.admin.service;
  
  import java.util.List;
  import java.util.concurrent.CompletableFuture;
  
  import com.linecorp.centraldogma.common.Author;
  import com.linecorp.centraldogma.common.Change;
  import com.linecorp.centraldogma.common.Commit;
  import com.linecorp.centraldogma.common.Entry;
  import com.linecorp.centraldogma.common.Markup;
  import com.linecorp.centraldogma.common.Revision;
  import com.linecorp.centraldogma.server.internal.admin.dto.AuthorDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.ChangeDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.CommentDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.CommitDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.EntryDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.ProjectDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.RepositoryDto;
  import com.linecorp.centraldogma.server.internal.admin.dto.RevisionDto;
  import com.linecorp.centraldogma.server.storage.project.Project;
  import com.linecorp.centraldogma.server.storage.repository.Repository;
  
  /**
   * A utility class to convert domain objects to DTO objects.
   */
  final class DtoConverter {
  
      static CompletableFuture<RepositoryDto> convert(Repository repository) {
          return repository.history(Revision.HEAD, Revision.HEAD, Repository.ALL_PATH, 1)
                           .thenApply(history -> fromCommit(repository.name(), history));
      }
  
      static ProjectDto convert(Project project) {
          final ProjectDto dto = new ProjectDto();
          dto.setName(project.name());
          return dto;
      }
  
      static CommitDto convert(Commit commit) {
          final CommitDto dto = new CommitDto();
          dto.setAuthor(convert(commit.author()));
          dto.setRevision(convert(commit.revision()));
          dto.setTimestamp(commit.whenAsText());
          dto.setSummary(commit.summary());
          dto.setDetail(convert(commit.detail(), commit.markup()));
          return dto;
      }
  
      static RevisionDto convert(Revision revision) {
          return new RevisionDto(revision.major(), 0, revision.text());
      }
  
      static AuthorDto convert(Author author) {
          final AuthorDto dto = new AuthorDto();
          dto.setName(author.name());
          dto.setEmail(author.email());
          return dto;
      }
  
      static CommentDto convert(String content, Markup markup) {
          final CommentDto dto = new CommentDto();
          dto.setContent(content);
          dto.setMarkup(markup.name());
          return dto;
      }
  
      static ChangeDto convert(Change<?> change) {
          final ChangeDto dto = new ChangeDto();
          dto.setPath(change.path());
          dto.setType(change.type().name());
          dto.setContent(change.contentAsText());
          return dto;
      }
  
      static EntryDto convert(Entry<?> entry) {
          final EntryDto dto = new EntryDto();
          dto.setRevision(entry.revision().text());
          dto.setPath(entry.path());
          dto.setType(entry.type().name());
          dto.setContent(entry.contentAsText());
          return dto;
      }
  
     static RepositoryDto fromCommit(String name, List<Commit> history) {
         final RepositoryDto dto = new RepositoryDto();
         dto.setName(name);
         dto.setHead(convert(history.get(0)));
         return dto;
     }
 
     private DtoConverter() {}
 }