/**
 * Copyright (C) SettleMint NV - All Rights Reserved
 *
 * Use of this file is strictly prohibited without an active subscription.
 * Distribution of this file, via any medium, is strictly prohibited.
 *
 * For license inquiries, contact hello@settlemint.com
 *
 * SPDX-License-Identifier: UNLICENSED
 */
pragma solidity ^0.8.24;

import { Context } from "@openzeppelin/contracts/utils/Context.sol";
import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";
import { MerkleProof } from "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";

abstract contract ERC721Whitelist is Context {
    bytes32 public _whitelistMerkleRoot;

    function _setWhitelistMerkleRoot(bytes32 whitelistMerkleRoot_) internal {
        _whitelistMerkleRoot = whitelistMerkleRoot_;
    }

    function _leaf(address account, string memory allowance) internal pure returns (bytes32) {
        return keccak256(abi.encode(account, allowance));
    }

    function _validateWhitelistMerkleProof(uint256 allowance, bytes32[] calldata proof) internal view returns (bool) {
        bytes32 leaf = _leaf(_msgSender(), Strings.toString(allowance));
        return MerkleProof.verify(proof, _whitelistMerkleRoot, leaf);
    }

    function _verify(bytes32 leaf, bytes32[] memory proof) internal view returns (bool) {
        require(_whitelistMerkleRoot != 0, "Whitelist merkle root not set");
        return MerkleProof.verify(proof, _whitelistMerkleRoot, leaf);
    }

    function getAllowance(string memory allowance, bytes32[] calldata proof) public view returns (string memory) {
        require(_verify(_leaf(msg.sender, allowance), proof), "Invalid Merkle Tree proof supplied.");
        return allowance;
    }

    function _disableWhitelistMerkleRoot() internal {
        delete _whitelistMerkleRoot;
    }
}