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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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/interfaces/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20.sol";

// File: @openzeppelin/contracts/security/Pausable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// 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: contracts/lib/seaport/SeaportEnums.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

enum OrderType {
    // 0: no partial fills, anyone can execute
    FULL_OPEN,

    // 1: partial fills supported, anyone can execute
    PARTIAL_OPEN,

    // 2: no partial fills, only offerer or zone can execute
    FULL_RESTRICTED,

    // 3: partial fills supported, only offerer or zone can execute
    PARTIAL_RESTRICTED,

    // 4: contract order type
    CONTRACT
}

enum ItemType {
    // 0: ETH on mainnet, MATIC on polygon, etc.
    NATIVE,

    // 1: ERC20 items (ERC777 and ERC20 analogues could also technically work)
    ERC20,

    // 2: ERC721 items
    ERC721,

    // 3: ERC1155 items
    ERC1155,

    // 4: ERC721 items where a number of tokenIds are supported
    ERC721_WITH_CRITERIA,

    // 5: ERC1155 items where a number of ids are supported
    ERC1155_WITH_CRITERIA
}

enum Side {
    // 0: Items that can be spent
    OFFER,

    // 1: Items that must be received
    CONSIDERATION
}
// File: contracts/lib/seaport/SeaportInterface.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;
import "./SeaportStructs.sol";


interface SeaportInterface {
  
function fulfillAdvancedOrder(
        AdvancedOrder calldata advancedOrder,
        CriteriaResolver[] calldata criteriaResolvers,
        bytes32 fulfillerConduitKey,
        address recipient
    ) external payable returns (bool fulfilled);

}
// File: contracts/lib/seaport/SeaportStructs.sol



// SPDX-License-Identifier: MIT
import "./SeaportEnums.sol";
pragma solidity ^0.8.13;

struct AdvancedOrder {
    OrderParameters parameters;
    uint120 numerator;
    uint120 denominator;
    bytes signature;
    bytes extraData;
}

struct OrderParameters {
    address offerer; // 0x00
    address zone; // 0x20
    OfferItem[] offer; // 0x40
    ConsiderationItem[] consideration; // 0x60
    OrderType orderType; // 0x80
    uint256 startTime; // 0xa0
    uint256 endTime; // 0xc0
    bytes32 zoneHash; // 0xe0
    uint256 salt; // 0x100
    bytes32 conduitKey; // 0x120
    uint256 totalOriginalConsiderationItems; // 0x140
    // offer.length                          // 0x160
}

struct OfferItem {
    ItemType itemType;
    address token;
    uint256 identifierOrCriteria;
    uint256 startAmount;
    uint256 endAmount;
}

struct ConsiderationItem {
    ItemType itemType;
    address token;
    uint256 identifierOrCriteria;
    uint256 startAmount;
    uint256 endAmount;
    address payable recipient;
}

struct CriteriaResolver {
    uint256 orderIndex;
    Side side;
    uint256 index;
    uint256 identifier;
    bytes32[] criteriaProof;
}
// File: contracts/TMSeaportProxy.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/interfaces/IERC20.sol";
import "./lib/seaport/SeaportInterface.sol";

contract TMSeaportProxy is Ownable, Pausable {
    SeaportInterface seaport;
    address kyberRouter;
    address constant NativeAddress = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    error InsufficientBalance(
        address token,
        uint256 available,
        uint256 required
    );
    error SwapFailed();

    error WrongInput();

    constructor(SeaportInterface _seaport, address _kyberRouter) {
        seaport = _seaport;
        kyberRouter = _kyberRouter;
    }

    function changeSeaport(
        SeaportInterface _seaport
    ) external onlyOwner whenPaused {
        seaport = _seaport;
    }

    function changeRouter(address _kyberRouter) external onlyOwner whenPaused {
        kyberRouter = _kyberRouter;
    }

    receive() external payable {}

    function unpause() external onlyOwner {
        _unpause();
    }

    function pause() external onlyOwner {
        _pause();
    }

    function approveToken(
        address token,
        address spender,
        uint amount
    ) external onlyOwner {
        IERC20(token).approve(spender, amount);
    }

    function rescueFunds(IERC20 token, uint256 amount) external onlyOwner {
        if (address(token) == NativeAddress) {
            payable(msg.sender).transfer(amount);
        } else {
            token.transfer(msg.sender, amount);
        }
    }

    function swapToFulfill(
        AdvancedOrder calldata advancedOrder,
        CriteriaResolver[] calldata criteriaResolvers,
        bytes32 fulfillerConduitKey,
        address recipient,
        bytes calldata swapData,
        address tokenIn,
        uint256 amountIn
    ) external payable whenNotPaused {
        // check consideration items
        address token;
        uint256 fulfillAmount = 0;
        uint256 returnAmount = 0;
        {
            if (tokenIn != NativeAddress) {
                IERC20(tokenIn).transferFrom(
                    msg.sender,
                    address(this),
                    amountIn
                );
                IERC20(tokenIn).approve(kyberRouter, amountIn);
            }
            //
            ConsiderationItem[] memory considerations = advancedOrder
                .parameters
                .consideration;

            token = address(considerations[0].token);
            for (uint i = 0; i < considerations.length; i++) {
                if (
                    considerations[i].token != token ||
                    considerations[i].startAmount != considerations[i].endAmount
                ) {
                    revert WrongInput();
                }
                fulfillAmount += considerations[i].endAmount;
            }
            fulfillAmount =
                (fulfillAmount * advancedOrder.numerator) /
                advancedOrder.denominator;

            //swap to consideration token
            (bool success, bytes memory data) = kyberRouter.call{
                value: msg.value
            }(swapData);

            if (!success) {
                revert SwapFailed();
            }
            (returnAmount, ) = abi.decode(data, (uint256, uint256));

            if (returnAmount < fulfillAmount) {
                revert InsufficientBalance(
                    address(considerations[0].token),
                    returnAmount,
                    fulfillAmount
                );
            }
        }
        // fulfill order!
        seaport.fulfillAdvancedOrder(
            advancedOrder,
            criteriaResolvers,
            fulfillerConduitKey,
            recipient
        );
        if (returnAmount > fulfillAmount)
            IERC20(token).transfer(msg.sender, returnAmount - fulfillAmount);
    }
}