// Copyright (C) 2018 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.google.gerrit.reviewdb.converter;

import com.google.gerrit.proto.Entities;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.PatchSetApproval;
import com.google.protobuf.Parser;
import java.sql.Timestamp;
import java.util.Objects;

public enum PatchSetApprovalProtoConverter
    implements ProtoConverter<Entities.PatchSetApproval, PatchSetApproval> {
  INSTANCE;

  private final ProtoConverter<Entities.PatchSetApproval_Key, PatchSetApproval.Key>
      patchSetApprovalKeyProtoConverter = PatchSetApprovalKeyProtoConverter.INSTANCE;
  private final ProtoConverter<Entities.Account_Id, Account.Id> accountIdConverter =
      AccountIdProtoConverter.INSTANCE;

  @Override
  public Entities.PatchSetApproval toProto(PatchSetApproval patchSetApproval) {
    Entities.PatchSetApproval.Builder builder =
        Entities.PatchSetApproval.newBuilder()
            .setKey(patchSetApprovalKeyProtoConverter.toProto(patchSetApproval.getKey()))
            .setValue(patchSetApproval.getValue())
            .setGranted(patchSetApproval.getGranted().getTime())
            .setPostSubmit(patchSetApproval.isPostSubmit());

    String tag = patchSetApproval.getTag();
    if (tag != null) {
      builder.setTag(tag);
    }
    Account.Id realAccountId = patchSetApproval.getRealAccountId();
    // PatchSetApproval#getRealAccountId automatically delegates to PatchSetApproval#getAccountId if
    // the real author is not set. However, the previous protobuf representation kept
    // 'realAccountId' empty if it wasn't set. To ensure binary compatibility, simulate the previous
    // behavior.
    if (realAccountId != null && !Objects.equals(realAccountId, patchSetApproval.getAccountId())) {
      builder.setRealAccountId(accountIdConverter.toProto(realAccountId));
    }

    return builder.build();
  }

  @Override
  public PatchSetApproval fromProto(Entities.PatchSetApproval proto) {
    PatchSetApproval patchSetApproval =
        new PatchSetApproval(
            patchSetApprovalKeyProtoConverter.fromProto(proto.getKey()),
            (short) proto.getValue(),
            new Timestamp(proto.getGranted()));
    if (proto.hasTag()) {
      patchSetApproval.setTag(proto.getTag());
    }
    if (proto.hasRealAccountId()) {
      patchSetApproval.setRealAccountId(accountIdConverter.fromProto(proto.getRealAccountId()));
    }
    if (proto.hasPostSubmit()) {
      patchSetApproval.setPostSubmit(proto.getPostSubmit());
    }
    return patchSetApproval;
  }

  @Override
  public Parser<Entities.PatchSetApproval> getParser() {
    return Entities.PatchSetApproval.parser();
  }
}