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package com.hedera.services.legacy.proto.utils;

/*-
 * ‌
 * Hedera Services API
 * 
 * Copyright (C) 2018 - 2020 Hedera Hashgraph, LLC
 * 
 * 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.
 * ‍
 */

import com.hederahashgraph.api.proto.java.FileID;
import com.hederahashgraph.api.proto.java.Timestamp;
import com.hederahashgraph.builder.RequestBuilder;
import java.time.Clock;
import java.time.Instant;

/**
 * Protobuf related utilities shared by client and server.
 *
 * @author hua Created on 2018-09-29
 */
public class ProtoCommonUtils {

  /**
   * Creates a file ID instance with given info.
   *
   * @return generated file ID instance
   */
  public static FileID createFileID(long fileNum, long realmNum, long shardNum) {
    FileID fid = FileID.newBuilder()
        .setFileNum(fileNum)
        .setRealmNum(realmNum)
        .setShardNum(shardNum).build();
    return fid;
  }

  /**
   * Gets current UTC timestamp.
   *
   * @param sec_to_wind seconds to wind the clock. If negative, wind back, else wind forward.
   * @return the timestamp
   */
  public static Timestamp getCurrentTimestampUTC(long sec_to_wind) {
    Timestamp timestamp = null;
    timestamp = RequestBuilder
        .getTimestamp(Instant.now(Clock.systemUTC()).plusSeconds(sec_to_wind));
    return timestamp;
  }

  /**
   * Gets the current UTC instant.
   */
  public static Instant getCurrentInstantUTC() {
    return Instant.now(Clock.systemUTC());
  }

  /**
   * Adds a number of seconds to a timestamp
   *
   * @param timestamp timestamp to which to add seconds
   * @param seconds number of seconds to add
   * @return the timestamp plus the number of seconds
   */
  public static Timestamp addSecondsToTimestamp(Timestamp timestamp, long seconds) {
    return Timestamp.newBuilder().setNanos(timestamp.getNanos())
        .setSeconds(timestamp.getSeconds() + seconds).build();
  }
}