// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import {ERC721Holder} from "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import {EnumerableSet} from "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol";
import {HasSignature} from "../core/HasSignature.sol";
import {TimeChecker} from "../utils/TimeChecker.sol";

interface INFT {
  function mint(address to, uint256 tokenID) external;
  function transferFrom(address from, address to, uint256 tokenId) external;
}

contract NFTLock is ERC721Holder, HasSignature, TimeChecker, Pausable {
  using EnumerableSet for EnumerableSet.UintSet;

  uint256 public immutable _CACHED_CHAIN_ID;
  address public immutable _CACHED_THIS;
  address public verifier;

  struct NFTInfo {
    uint256 tokenId;
    bool isMint;
  }
  mapping(address nft => mapping(uint256 tokenId => address user)) public lockedOriginal;
  mapping(address nft => mapping(address user => EnumerableSet.UintSet tokenIdSet)) private lockedRecords;
  mapping(address nft => bool status) public supportNftList;

  event UnLock(address indexed nft, address indexed user, uint256 nonce, NFTInfo[] nftList);
  event Lock(address indexed nft, address indexed user, uint256[] tokenIds);
  event VerifierUpdated(address indexed verifier);

  constructor(uint256 _duration, address _verifier) TimeChecker(_duration) {
    _CACHED_CHAIN_ID = block.chainid;
    _CACHED_THIS = address(this);
    verifier = _verifier;
  }

  function lock(address nft, uint256[] calldata tokenIds) external whenNotPaused{
    require(tokenIds.length <= 100, "tokenIds too many");
    address to = _msgSender();
    for (uint256 i = 0; i < tokenIds.length; i++) {
      INFT(nft).transferFrom(to, address(this), tokenIds[i]);
      lockedOriginal[nft][tokenIds[i]] = to;
      lockedRecords[nft][to].add(tokenIds[i]);
    }
    emit Lock(nft, to, tokenIds);
  }
  /**
   * @dev unlock or mint nft
   * if tokenId not exists, mint it
   * if exists and user is owner, unlock it
   */
  function unlockOrMint(
    address nft,
    NFTInfo[] calldata nftList,
    uint256 signTime,
    uint256 saltNonce,
    bytes calldata signature
  ) external signatureValid(signature) timeValid(signTime) whenNotPaused {
    require(nftList.length <= 100, "tokenIds too many");
    address to = _msgSender();
    bytes32 messageHash = getMessageHash(to, nft, nftList, _CACHED_THIS, _CACHED_CHAIN_ID, signTime, saltNonce);
    checkSigner(verifier, messageHash, signature);
    for (uint256 i = 0; i < nftList.length; i++) {
      if (nftList[i].isMint) {
        INFT(nft).mint(to, nftList[i].tokenId);
      } else {
        require(lockedOriginal[nft][nftList[i].tokenId] == to, "not owner");
        INFT(nft).transferFrom(address(this), to, nftList[i].tokenId);
        lockedRecords[nft][to].remove(nftList[i].tokenId);
        delete lockedOriginal[nft][nftList[i].tokenId];
      }
    }
    _useSignature(signature);
    emit UnLock(nft, to, saltNonce, nftList);
  }

  /** ------get------- **/
  function lockedNum(address token, address user) public view returns (uint256) {
    return lockedRecords[token][user].length();
  }

  function lockedNft(address token, address user) public view returns (uint256[] memory) {
    return lockedRecords[token][user].values();
  }

  function addSupportNftList(address[] calldata nftList) external onlyOwner {
    for (uint256 i = 0; i < nftList.length; i++) {
      supportNftList[nftList[i]] = true;
    }
  }
  function removeSupportNft(address nftAddress) external onlyOwner {
    require(supportNftList[nftAddress], "can't remove");
    delete supportNftList[nftAddress];
  }

  /**
   * @dev update verifier address
   */
  function updateVerifier(address _verifier) external onlyOwner {
    require(_verifier != address(0), "NFTClaimer: address can not be zero");
    verifier = _verifier;
    emit VerifierUpdated(_verifier);
  }

  function getMessageHash(
    address _to,
    address _nft,
    NFTInfo[] memory _ids,
    address _contract,
    uint256 _chainId,
    uint256 _signTime,
    uint256 _saltNonce
  ) public pure returns (bytes32) {
    bytes memory encoded = abi.encodePacked(_to, _nft, _contract, _chainId, _signTime, _saltNonce);
    for (uint256 i = 0; i < _ids.length; ++i) {
      encoded = bytes.concat(encoded, abi.encodePacked(_ids[i].tokenId));
      encoded = bytes.concat(encoded, abi.encodePacked(_ids[i].isMint));
    }
    return keccak256(encoded);
  }
}