/*
    Copyright 2020 Set Labs Inc.

    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.

    SPDX-License-Identifier: Apache License, Version 2.0
*/

pragma solidity 0.6.10;

/**
 * Mock ChainlinkAggregator that can be passed to any contract that consumes these.
 * This contract was implemented for the PerpV2 fixture as a substitute for the smock-ed
 * aggregators they use in their own test suite.
 */
contract ChainlinkAggregatorMock {
    int256 public latestAnswer;
    uint80 public latestRoundId;
    uint256 public latestStartedAt;
    uint256 public latestUpdatedAt;
    uint80 public latestAnsweredInRound;
    uint8 public decimals;

    // Perp sets this to `6` in their fixtures...
    constructor(uint8 _decimals) public {
        decimals = _decimals;
    }

    /**
     * Typical usage for setting the BaseToken oracle to 100 is:
     *
     * ```
     *  await mockAggregator.setLatestAnswer(ethers.utils.parseUnits("100", 6));
     * ```
     */
    function setLatestAnswer(int256 _latestAnswer) public {
        latestAnswer = _latestAnswer;
    }

    /**
     * Typical usage for setting the BaseToken oracle to 100 is:
     *
     * ```
     *  await mockAggregator.setRoundData(0, ethers.utils.parseUnits("100", 6),0,0,0);
     * ```
     */
    function setRoundData(
        uint80 _roundId,
        int256 _answer,
        uint256 _startedAt,
        uint256 _updatedAt,
        uint80 _answeredInRound
    )
        public
    {
        latestRoundId = _roundId;
        latestAnswer = _answer;
        latestStartedAt = _startedAt;
        latestUpdatedAt = _updatedAt;
        latestAnsweredInRound = _answeredInRound;
    }

    // Consumed by PerpV2.ChainlinkPriceFeed
    function getRoundData(uint80 /* _roundId */)
        public
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (
            latestRoundId,
            latestAnswer,
            latestStartedAt,
            latestUpdatedAt,
            latestAnsweredInRound
        );
    }

    // Consumed by PerpV2.ChainlinkPriceFeed
    function latestRoundData()
        public
        view
        returns (
            uint80 roundId,
            int256 answer,
            uint256 startedAt,
            uint256 updatedAt,
            uint80 answeredInRound
        )
    {
        return (
            latestRoundId,
            latestAnswer,
            latestStartedAt,
            latestUpdatedAt,
            latestAnsweredInRound
        );
    }
}