pragma solidity ^0.4.25;

import "../service/DaoListingService.sol";
import "./DaoConstants.sol";
import "./IdentityCommon.sol";
import "../storage/DaoConfigsStorage.sol";
import "../storage/DaoStakeStorage.sol";
import "../storage/DaoStorage.sol";
import "../storage/DaoProposalCounterStorage.sol";
import "../storage/DaoUpgradeStorage.sol";
import "../storage/DaoSpecialStorage.sol";
import "../storage/DaoPointsStorage.sol";
import "../storage/DaoRewardsStorage.sol";
import "../storage/IntermediateResultsStorage.sol";
import "../lib/MathHelper.sol";

contract DaoCommonMini is IdentityCommon {

    using MathHelper for MathHelper;

    /**
    @notice Check if the DAO contracts have been replaced by a new set of contracts
    @return _isNotReplaced true if it is not replaced, false if it has already been replaced
    */
    function isDaoNotReplaced()
        public
        view
        returns (bool _isNotReplaced)
    {
        _isNotReplaced = !daoUpgradeStorage().isReplacedByNewDao();
    }

    /**
    @notice Check if it is currently in the locking phase
    @dev No governance activities can happen in the locking phase. The locking phase is from t=0 to t=CONFIG_LOCKING_PHASE_DURATION-1
    @return _isLockingPhase true if it is in the locking phase
    */
    function isLockingPhase()
        public
        view
        returns (bool _isLockingPhase)
    {
        _isLockingPhase = currentTimeInQuarter() < getUintConfig(CONFIG_LOCKING_PHASE_DURATION);
    }

    /**
    @notice Check if it is currently in a main phase.
    @dev The main phase is where all the governance activities could take plase. If the DAO is replaced, there can never be any more main phase.
    @return _isMainPhase true if it is in a main phase
    */
    function isMainPhase()
        public
        view
        returns (bool _isMainPhase)
    {
        _isMainPhase =
            isDaoNotReplaced() &&
            currentTimeInQuarter() >= getUintConfig(CONFIG_LOCKING_PHASE_DURATION);
    }

    /**
    @notice Check if the calculateGlobalRewardsBeforeNewQuarter function has been done for a certain quarter
    @dev However, there is no need to run calculateGlobalRewardsBeforeNewQuarter for the first quarter
    */
    modifier ifGlobalRewardsSet(uint256 _quarterNumber) {
        if (_quarterNumber > 1) {
            require(daoRewardsStorage().readDgxDistributionDay(_quarterNumber) > 0);
        }
        _;
    }

    /**
    @notice require that it is currently during a phase, which is within _relativePhaseStart and _relativePhaseEnd seconds, after the _startingPoint
    */
    function requireInPhase(uint256 _startingPoint, uint256 _relativePhaseStart, uint256 _relativePhaseEnd)
        internal
        view
    {
        require(_startingPoint > 0, "start not set");
        require(now < _startingPoint.add(_relativePhaseEnd), "not within phase end");
        require(now >= _startingPoint.add(_relativePhaseStart), "not after phase start");
    }

    /**
    @notice Get the current quarter index
    @dev Quarter indexes starts from 1
    @return _quarterNumber the current quarter index
    */
    function currentQuarterNumber()
        public
        view
        returns(uint256 _quarterNumber)
    {
        _quarterNumber = getQuarterNumber(now);
    }

    /**
    @notice Get the quarter index of a timestamp
    @dev Quarter indexes starts from 1
    @return _index the quarter index
    */
    function getQuarterNumber(uint256 _time)
        internal
        view
        returns (uint256 _index)
    {
        require(startOfFirstQuarterIsSet());
        _index =
            _time.sub(daoUpgradeStorage().startOfFirstQuarter())
            .div(getUintConfig(CONFIG_QUARTER_DURATION))
            .add(1);
    }

    /**
    @notice Get the relative time in quarter of a timestamp
    @dev For example, the timeInQuarter of the first second of any quarter n-th is always 1
    */
    function timeInQuarter(uint256 _time)
        internal
        view
        returns (uint256 _timeInQuarter)
    {
        require(startOfFirstQuarterIsSet()); // must be already set
        _timeInQuarter =
            _time.sub(daoUpgradeStorage().startOfFirstQuarter())
            % getUintConfig(CONFIG_QUARTER_DURATION);
    }

    /**
    @notice Check if the start of first quarter is already set
    @return _isSet true if start of first quarter is already set
    */
    function startOfFirstQuarterIsSet()
        internal
        view
        returns (bool _isSet)
    {
        _isSet = daoUpgradeStorage().startOfFirstQuarter() != 0;
    }

    /**
    @notice Get the current relative time in the quarter
    @dev For example: the currentTimeInQuarter of the first second of any quarter is 1
    @return _currentT the current relative time in the quarter
    */
    function currentTimeInQuarter()
        public
        view
        returns (uint256 _currentT)
    {
        _currentT = timeInQuarter(now);
    }

    /**
    @notice Get the time remaining in the quarter
    */
    function getTimeLeftInQuarter(uint256 _time)
        internal
        view
        returns (uint256 _timeLeftInQuarter)
    {
        _timeLeftInQuarter = getUintConfig(CONFIG_QUARTER_DURATION).sub(timeInQuarter(_time));
    }

    function daoListingService()
        internal
        view
        returns (DaoListingService _contract)
    {
        _contract = DaoListingService(get_contract(CONTRACT_SERVICE_DAO_LISTING));
    }

    function daoConfigsStorage()
        internal
        view
        returns (DaoConfigsStorage _contract)
    {
        _contract = DaoConfigsStorage(get_contract(CONTRACT_STORAGE_DAO_CONFIG));
    }

    function daoStakeStorage()
        internal
        view
        returns (DaoStakeStorage _contract)
    {
        _contract = DaoStakeStorage(get_contract(CONTRACT_STORAGE_DAO_STAKE));
    }

    function daoStorage()
        internal
        view
        returns (DaoStorage _contract)
    {
        _contract = DaoStorage(get_contract(CONTRACT_STORAGE_DAO));
    }

    function daoProposalCounterStorage()
        internal
        view
        returns (DaoProposalCounterStorage _contract)
    {
        _contract = DaoProposalCounterStorage(get_contract(CONTRACT_STORAGE_DAO_COUNTER));
    }

    function daoUpgradeStorage()
        internal
        view
        returns (DaoUpgradeStorage _contract)
    {
        _contract = DaoUpgradeStorage(get_contract(CONTRACT_STORAGE_DAO_UPGRADE));
    }

    function daoSpecialStorage()
        internal
        view
        returns (DaoSpecialStorage _contract)
    {
        _contract = DaoSpecialStorage(get_contract(CONTRACT_STORAGE_DAO_SPECIAL));
    }

    function daoPointsStorage()
        internal
        view
        returns (DaoPointsStorage _contract)
    {
        _contract = DaoPointsStorage(get_contract(CONTRACT_STORAGE_DAO_POINTS));
    }

    function daoRewardsStorage()
        internal
        view
        returns (DaoRewardsStorage _contract)
    {
        _contract = DaoRewardsStorage(get_contract(CONTRACT_STORAGE_DAO_REWARDS));
    }

    function intermediateResultsStorage()
        internal
        view
        returns (IntermediateResultsStorage _contract)
    {
        _contract = IntermediateResultsStorage(get_contract(CONTRACT_STORAGE_INTERMEDIATE_RESULTS));
    }

    function getUintConfig(bytes32 _configKey)
        public
        view
        returns (uint256 _configValue)
    {
        _configValue = daoConfigsStorage().uintConfigs(_configKey);
    }
}