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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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;
    }
}

// File: @openzeppelin/contracts/utils/math/SafeMath.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// File: contracts/AuctionHouse.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

interface INFTContract {
    function publicMint(address to, uint256 auctionID) external;

    function totalSupply() external view returns (uint256);

    function MAX_SUPPLY() external view returns (uint256);
}

contract AuctionHouse is Ownable {
    using SafeMath for uint256;
    event BidEvent(uint256 auctionId, address from, uint256 amount);

    struct Auction {
        uint256 startAt;
        uint256 duration;
        bool active;
        mapping(address => uint256) bids;
        address highestBidder;
        uint256 highestBid;
        bool auctionCreated;
        uint256 tokenMinted;
    }

    struct Bid {
        address from;
        uint256 amount;
    }

    mapping(uint256 => Auction) private auctions;
    mapping(uint256 => Bid[]) private bids;
    mapping(address => bool) private AdminWhitelist;

    uint256 private currentAuctionId = 1;
    uint256 public minAuctionLength = 100;
    uint256 public minBidIncrement = 0.01 ether;
    uint256 public Generated = 0;

    INFTContract NFTContract;
    address public ownerAddress;

    modifier onlyAdmin() {
        require(
            AdminWhitelist[msg.sender] || msg.sender == owner(),
            "You do not have admin access"
        );
        _;
    }

    constructor(address contractAddress, address _owner) {
        NFTContract = INFTContract(contractAddress);
        ownerAddress = _owner;
    }

    function createAuction(
        uint256 duration
    ) external onlyAdmin returns (uint256) {
        // require(duration > 0, "Duration should be greater than zero");
        require(
            duration >= minAuctionLength,
            "Duration should be greater than minAuctionLength"
        );

        require(canCreateAuction(), "Can not create auction");

        auctions[currentAuctionId].startAt = block.timestamp;
        auctions[currentAuctionId].duration = duration;
        auctions[currentAuctionId].active = true;
        auctions[currentAuctionId].auctionCreated = true;
        currentAuctionId++;
        return currentAuctionId - 1;
    }

    function mintOwner() public onlyAdmin {
        require(canCreateAuction(), "Can not create auction");

        auctions[currentAuctionId].startAt = block.timestamp;
        auctions[currentAuctionId].duration = 0;
        auctions[currentAuctionId].active = false;
        auctions[currentAuctionId].auctionCreated = true;

        NFTContract.publicMint(msg.sender, currentAuctionId);
        auctions[currentAuctionId].tokenMinted = NFTContract.totalSupply();
        currentAuctionId++;
    }

    function bid(uint256 auctionId) public payable {
        Auction storage auction = auctions[auctionId];
        require(auction.active, "Auction does not exist or has ended");
        require(msg.value > 0, "Missing amount");
        require(
            block.timestamp < auction.startAt + auction.duration,
            "Auction has ended"
        );

        uint256 currentBid = msg.value;
        require(
            currentBid > auction.highestBid,
            "Amount must be higher than highest bid"
        );

        require(
            currentBid.sub(auction.highestBid) >= minBidIncrement,
            "Bid increment is too low"
        );

        if (auction.highestBidder != address(0)) {
            payable(auction.highestBidder).transfer(auction.highestBid);
        }

        auction.highestBidder = msg.sender;
        auction.highestBid = currentBid;
        auction.bids[msg.sender] = currentBid;

        Bid memory newBid = Bid(msg.sender, msg.value);
        bids[auctionId].push(newBid);

        emit BidEvent(auctionId, msg.sender, msg.value);
    }

    function endAuction(uint256 auctionId) public {
        Auction storage auction = auctions[auctionId];
        require(auction.auctionCreated, "Auction does not exist");
        require(
            block.timestamp >= auction.startAt + auction.duration,
            "Auction has not ended yet"
        );
        require(auction.active, "Auction must be active");

        auction.active = false;

        if (auction.highestBidder != address(0)) {
            NFTContract.publicMint(auction.highestBidder, auctionId);
            //get the token id minted
            auction.tokenMinted = NFTContract.totalSupply();
            payable(ownerAddress).transfer(auction.highestBid);
            Generated = Generated + auction.highestBid;
        } else {
            NFTContract.publicMint(owner(), auctionId);
        }
    }

    function setMinAuctionLength(uint256 _minAuctionLength) public onlyAdmin {
        minAuctionLength = _minAuctionLength;
    }

    function setMinBidIncrement(uint256 _minBidIncrement) public onlyAdmin {
        minBidIncrement = _minBidIncrement;
    }

    function getAuctionInfo(
        uint256 auctionId
    )
        public
        view
        returns (
            uint256 startAt,
            uint256 duration,
            bool active,
            address highestBidder,
            uint256 highestBid,
            bool auctionCreated
        )
    {
        Auction storage auction = auctions[auctionId];
        startAt = auction.startAt;
        duration = auction.duration;
        active = auction.active;
        highestBidder = auction.highestBidder;
        highestBid = auction.highestBid;
        auctionCreated = auction.auctionCreated;

        return (
            startAt,
            duration,
            active,
            highestBidder,
            highestBid,
            auctionCreated
        );
    }

    function getBidsForAuction(
        uint256 auctionId
    ) public view returns (Bid[] memory) {
        return bids[auctionId];
    }

    function getTotalBidsForAuction(
        uint256 auctionId
    ) public view returns (uint256) {
        return bids[auctionId].length;
    }

    function getCurrentAuctionId() public view returns (uint256) {
        return currentAuctionId - 1;
    }

    function getTimeLeftCurrentAuction() public view returns (uint256) {
        uint256 auctionId = getCurrentAuctionId();
        Auction storage auction = auctions[auctionId];
        require(auction.active, "Auction does not exist or has ended");
        require(
            block.timestamp < auction.startAt + auction.duration,
            "Auction has ended"
        );
        return auction.startAt + auction.duration - block.timestamp;
    }

    function getTimeLeftAuctionByID(
        uint256 auctionId
    ) public view returns (uint256) {
        Auction storage auction = auctions[auctionId];
        require(auction.active, "Auction does not exist or has ended");
        require(
            block.timestamp < auction.startAt + auction.duration,
            "Auction has ended"
        );
        return auction.startAt + auction.duration - block.timestamp;
    }

    function canCreateAuction() public view returns (bool) {
        if (NFTContract.totalSupply() < NFTContract.MAX_SUPPLY()) {
            return true;
        } else {
            return false;
        }
    }

    function whitelistAdmin(address _address) public onlyOwner {
        AdminWhitelist[_address] = true;
    }

    function removeAdminWhitelist(address _address) public onlyOwner {
        AdminWhitelist[_address] = false;
    }

    function setOwner(address _owner) public onlyOwner {
        ownerAddress = _owner;
    }

    function withdraw() external payable onlyOwner {
        require(
            auctions[getCurrentAuctionId()].active == false,
            "Cannot withdraw while there is an active auction"
        );

        (bool payment, ) = payable(owner()).call{value: address(this).balance}(
            ""
        );
        require(payment);
    }
}