// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;

import "../interfaces/AggregatorInterface.sol";

/**
 * @title MockV2Aggregator
 * @notice Based on the HistoricAggregator contract
 * @notice Use this contract when you need to test
 * other contract's ability to read data from an
 * aggregator contract, but how the aggregator got
 * its answer is unimportant
 */
contract MockV2Aggregator is AggregatorInterface {
  int256 public override latestAnswer;
  uint256 public override latestTimestamp;
  uint256 public override latestRound;

  mapping(uint256 => int256) public override getAnswer;
  mapping(uint256 => uint256) public override getTimestamp;
  mapping(uint256 => uint256) private getStartedAt;

  constructor(
    int256 _initialAnswer
  ) public {
    updateAnswer(_initialAnswer);
  }

  function updateAnswer(
    int256 _answer
  ) public {
    latestAnswer = _answer;
    latestTimestamp = block.timestamp;
    latestRound++;
    getAnswer[latestRound] = _answer;
    getTimestamp[latestRound] = block.timestamp;
  }

  function updateRoundData(
    uint256 _roundId,
    int256 _answer,
    uint256 _timestamp,
    uint256 _startedAt
  ) public {
    latestRound = _roundId;
    latestAnswer = _answer;
    latestTimestamp = _timestamp;
    getAnswer[latestRound] = _answer;
    getTimestamp[latestRound] = _timestamp;
    getStartedAt[latestRound] = _startedAt;
  }
}