contract DrakeLand is ERC721Enumerable, Ownable {
  using Strings for uint256;

  string baseURI;
  string public baseExtension = ".json";
  string public notRevealedUri;
  uint256 public cost = 0.08 ether;
  uint256 public maxSupply = 3800;
  uint256 public maxMintAmount = 51;
  uint256 public nftPerAddressLimit = 51;
  bool public paused = false;
  bool public revealed = false;
  bool public onlyWhitelisted = true;
  address[] public whitelistedAddresses;
  mapping(address => uint256) public addressMintedBalance;

  constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI,
    string memory _initNotRevealedUri
  ) ERC721(_name, _symbol) {
    setBaseURI(_initBaseURI);
    setNotRevealedURI(_initNotRevealedUri);
  }

  // internal
  function _baseURI() internal view virtual override returns (string memory) {
    return baseURI;
  }

  // public
  function mint(uint256 _mintAmount) public payable {
    require(!paused);
    uint256 supply = totalSupply();
    require(_mintAmount > 0);
    require(_mintAmount <= maxMintAmount);
    require(supply + _mintAmount <= maxSupply);

    if (msg.sender != owner()) {
        if(onlyWhitelisted == true){
            require(isWhitelisted(msg.sender), "user is not whitelisted");
            uint256 ownerMintedCount = addressMintedBalance[msg.sender];
            require(ownerMintedCount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");
        }
      require(msg.value >= cost * _mintAmount);
    }

    for (uint256 i = 1; i <= _mintAmount; i++) {
        addressMintedBalance[msg.sender]++;
      _safeMint(msg.sender, supply + i);
    }
  }
  function isWhitelisted(address _user) public view returns(bool) {
      for(uint i = 0; i < whitelistedAddresses.length; i++){
          if(whitelistedAddresses[i] == _user) {
              return true;
          }
      }
      return false;
  }

  function walletOfOwner(address _owner)
    public
    view
    returns (uint256[] memory)
  {
    uint256 ownerTokenCount = balanceOf(_owner);
    uint256[] memory tokenIds = new uint256[](ownerTokenCount);
    for (uint256 i; i < ownerTokenCount; i++) {
      tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
    }
    return tokenIds;
  }

  function tokenURI(uint256 tokenId)
    public
    view
    virtual
    override
    returns (string memory)
  {
    require(
      _exists(tokenId),
      "ERC721Metadata: URI query for nonexistent token"
    );
    
    if(revealed == false) {
        return notRevealedUri;
    }

    string memory currentBaseURI = _baseURI();
    return bytes(currentBaseURI).length > 0
        ? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
        : "";
  }

  //only owner
  function reveal() public onlyOwner() {
      revealed = true;
  }
  
  function setNftPerAddressLimit(uint256 _limit) public onlyOwner() {
    nftPerAddressLimit = _limit;
  }
  
  function setCost(uint256 _newCost) public onlyOwner() {
    nftPerAddressLimit = _newCost;
  }

  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner() {
    maxMintAmount = _newmaxMintAmount;
  }
  
  function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
    notRevealedUri = _notRevealedURI;
  }

  function setBaseURI(string memory _newBaseURI) public onlyOwner {
    baseURI = _newBaseURI;
  }

  function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
    baseExtension = _newBaseExtension;
  }

  function pause(bool _state) public onlyOwner {
    paused = _state;
  }

   function setOnlyWhitelisted(bool _state) public onlyOwner {
    onlyWhitelisted = _state;
  }

  function whitelistUsers(address[] calldata _users) public onlyOwner {
      delete whitelistedAddresses;
      whitelistedAddresses = _users;

  } 
 
  function withdraw() public payable onlyOwner {
    (bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
    require(success);
  }
}
function _baseURI() internal view virtual override returns (string memory) {
  return baseURI;
}

// internal