// File: contracts/TreeMarket/TreeMarket.sol



// SPDX-License-Identifier: MIT
/*
 ______     __                            __           __                      __
|_   _ \   [  |                          |  ]         [  |                    |  ]
  | |_) |   | |    .--.     .--.     .--.| |   .--.    | |--.    .---.    .--.| |
  |  __'.   | |  / .'`\ \ / .'`\ \ / /'`\' |  ( (`\]   | .-. |  / /__\\ / /'`\' |
 _| |__) |  | |  | \__. | | \__. | | \__/  |   `'.'.   | | | |  | \__., | \__/  |
|_______/  [___]  '.__.'   '.__.'   '.__.;__] [\__) ) [___]|__]  '.__.'  '.__.;__]
                      ________
                      ___  __ )_____ ______ _________________
                      __  __  |_  _ \_  __ `/__  ___/__  ___/
                      _  /_/ / /  __// /_/ / _  /    _(__  )
                      /_____/  \___/ \__,_/  /_/     /____/
*/
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";

interface INFT {
    function transferFrom(
        address _from,
        address _to,
        uint256 _tokenId
    ) external;
}

interface IBloodToken {
  function spend(address wallet_, uint256 amount_) external;
  function walletsBalances(address wallet_) external view returns (uint256);
}

contract TreeMarket is Ownable {

    IBloodToken public bloodToken;
    address public signer;

    struct ListItem {
        uint256 projectId; // internal projectId from DB
        address nft; // collection address
        uint256 tokenId; // tokenId
        uint256 price; // only for direct buy, otherwise 0
        bool isAuction;
    }

    struct ItemRemove {
        address nft; // collection address
        uint256 tokenId; // tokenId
    }

    mapping(uint256 => ListItem) public listDetails;
    mapping(bytes32 => bool) private hashUsage;

    event ItemAdded(uint256 project, address nft, uint256 tokenId, uint256 price, bool isAuction);
    event ItemRemoved(uint256 project, address nft, uint256 tokenId);
    event ItemModified(uint256 project, address nft, uint256 tokenId, uint256 price, bool isAuction);
    event ItemBought(address wallet, uint256 project, uint256 price, bool isAuction);

    constructor(
        address _bloodToken,
        address _signer
    ) {
        bloodToken = IBloodToken(_bloodToken);
        signer = _signer;
    }

    function addItems(ListItem[] calldata _items) external onlyOwner {
        for (uint8 i = 0; i < _items.length; i++) {
            require(
                listDetails[_items[i].projectId].nft == address(0), 
                "NFT already listed."
            );

            INFT(_items[i].nft).transferFrom(msg.sender, address(this), _items[i].tokenId);

            listDetails[_items[i].projectId] = _items[i];

            emit ItemAdded(
                _items[i].projectId, 
                _items[i].nft, 
                _items[i].tokenId, 
                _items[i].price, 
                _items[i].isAuction
            );
        }
    }

    function removeItems(uint256[] calldata _projectIds) external onlyOwner {
        for (uint8 i = 0; i < _projectIds.length; i++) {
            ListItem memory item = listDetails[_projectIds[i]];
            require(item.nft != address(0), "NFT not listed.");

            INFT(item.nft).transferFrom(address(this), msg.sender, item.tokenId);

            emit ItemRemoved(
                _projectIds[i], 
                listDetails[_projectIds[i]].nft, 
                listDetails[_projectIds[i]].tokenId
            );
            delete listDetails[_projectIds[i]];
        }
    }

    function modifyItems(ListItem[] calldata _items) external onlyOwner {
        for (uint8 i = 0; i < _items.length; i++) {
            require(
                listDetails[_items[i].projectId].nft != address(0), 
                "NFT not listed."
            );

            listDetails[_items[i].projectId].price = _items[i].price;
            listDetails[_items[i].projectId].isAuction = _items[i].isAuction;

            emit ItemModified(
                _items[i].projectId, 
                _items[i].nft, 
                _items[i].tokenId, 
                _items[i].price, 
                _items[i].isAuction
            );
        }
    }

    function directBuy(address _nft, uint256 _tokenId, uint256 _projectId) external {
        require(listDetails[_projectId].nft != address(0), "NFT not listed.");
        require(!listDetails[_projectId].isAuction, "Direct buy not allowed.");

        executeOrder(_nft, _tokenId, _projectId, listDetails[_projectId].price);
    }

    function claimBid(
        address _nft, 
        uint256 _tokenId,
        uint256 _projectId,
        uint256 _price, 
        uint256 _timestamp, 
        bytes memory _signature
    ) external {
        require(listDetails[_projectId].nft != address(0), "NFT not listed.");
        require(listDetails[_projectId].isAuction, "Auction bid not allowed.");
        require(
            validateSignature(msg.sender, _nft, _tokenId, _projectId, _price, _timestamp, _signature),
            "Invalid signature."
        );

        executeOrder(_nft, _tokenId, _projectId, _price);
    }

    function executeOrder(address _nft, uint256 _tokenId, uint256 _projectId, uint256 _price) private {
        require(
            bloodToken.walletsBalances(msg.sender) >= _price, 
            "Insufficient BLD on internal wallet."
        );
        
        if (_price > 0) {
            bloodToken.spend(msg.sender, _price);
        }
        INFT(_nft).transferFrom(address(this), msg.sender, _tokenId);

        emit ItemBought(msg.sender, _projectId, _price, listDetails[_projectId].isAuction);
        delete listDetails[_projectId];
    }

    /**
    * @dev Validates signature.
    * @param _sender User wanting to buy.
    * @param _nft Collection address.
    * @param _tokenId tokenId from collection.
    * @param _projectId projectId from DB.
    * @param _price Price for which user is buying.
    * @param _timestamp Signature creation timestamp.
    * @param _signature Signature of above data.
    */
    function validateSignature(
        address _sender,
        address _nft,
        uint256 _tokenId,
        uint256 _projectId,
        uint256 _price,
        uint256 _timestamp,
        bytes memory _signature
    ) private returns (bool) {
        bytes32 dataHash = keccak256(
            abi.encodePacked(_sender, _nft, _tokenId, _projectId, _price, _timestamp)
        );
        require(!hashUsage[dataHash], "Signature already used.");
        hashUsage[dataHash] = true;

        bytes32 message = ECDSA.toEthSignedMessageHash(dataHash);
        address receivedAddress = ECDSA.recover(message, _signature);
        return receivedAddress == signer;
    }

    function setSigner(address _signer) external onlyOwner {
        signer = _signer;
    }
}

// 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/cryptography/ECDSA.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// 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/Strings.sol



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

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}