// File: contracts/HoldingFacilityLogic.sol



// SPDX-License-Identifier: MIT LICENSE

pragma solidity ^0.8.9;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";


interface ICryptid {
    function ownerOf(uint id) external view returns (address);
    function transferFrom(address from, address to, uint tokenId) external;
    function safeTransferFrom(address from, address to, uint tokenId) external;
}

interface IPowerup {
    function mintPowerup(address account) external;
    function burn(address _user, uint id, uint quantity) external;
}

interface IHoldingStorage {
    function getAccountStakedCount(address user) external view returns (uint256);
    function getAccountLastUpdate(address user) external view returns (uint256);
    function spendBounty(address _staker, uint256 _amount) external;
}

contract HoldingFacilityLogic is Ownable, ReentrancyGuard {
    bool private _paused = false;

    ICryptid public cryptid;
    IPowerup public powerup;
    IHoldingStorage public holdingStorage;

    mapping(address => bool) public managers;
    mapping(address => uint256) public yieldMod;


    uint public constant DAILY_YIELD_RATE = 15 ether;
    uint256 public powerupCost = 300 ether;

    // emergency rescue to allow unstaking without any checks but without $GGOLD
    bool public rescueEnabled = false;

//   ==== MODIFIERS ====

    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

//   ==== Public Write Functions ====
 
    function usePowerup (uint8 id) public whenNotPaused nonReentrant {
        powerup.burn(msg.sender, id, 1);
        if (id == 1) {
            updateYieldMod(msg.sender, 10);
        }
        if (id == 2) {
            updateYieldMod(msg.sender, 30);
        }
        else {}
    }

    function purchasePowerup () public whenNotPaused nonReentrant {
        holdingStorage.spendBounty(msg.sender, powerupCost);
        powerup.mintPowerup(msg.sender);
        powerupCost = powerupCost + (powerupCost/100);
    }


//   ==== Public Read Functions ====

    function paused() public view virtual returns(bool) {
        return _paused;
    }
    
    function getPendingReward(address user) external view returns(uint256) {
        if (holdingStorage.getAccountStakedCount(user) == 0) {
            return 0;
        }
        else {
          uint256 pendingRewards = holdingStorage.getAccountStakedCount(user) * DAILY_YIELD_RATE * ((yieldMod[user] + 100) / 100) * (block.timestamp - holdingStorage.getAccountLastUpdate(user)) / 86400;
        return pendingRewards;  
        }
    }

    function getYieldMod(address _user) public view virtual returns(uint256) {
        return yieldMod[_user];
    }

//   ==== Internal Functions ====

    function updateYieldMod(address _account, uint256 _amount) internal { 
        require(yieldMod[_account] < 300, "Max yield modification already achieved");
        if(yieldMod[_account] + _amount >= 300) {
            yieldMod[_account] = 300;
        }
        else {
            yieldMod[_account] = yieldMod[_account] + _amount;
        }
    }    

//   ==== Admin Functions ====

    function setRescueEnabled(bool _enabled) external onlyOwner {
        rescueEnabled = _enabled;
    }

    function setPaused(bool _state) external onlyOwner {
        _paused = _state;
    }

    function setCryptid(address _cryptid) external onlyOwner { 
        cryptid = ICryptid(_cryptid); 
    }

    function setPowerup(address _powerup) external onlyOwner {
        powerup = IPowerup(_powerup);
    }

    function setStorage(address _storage) external onlyOwner {
        holdingStorage = IHoldingStorage(_storage);
    }

}
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}