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

  string public baseURI;
  string public baseExtension = ".json";
  uint256 public cost = .033 ether;
  uint256 public maxSupply = 3333;
  uint256 public maxMintAmount = 10;
  uint256 public maxPerAddress = 4;
  bool public paused = false;
  bool public onlyWhiteListed = true;
  address[] public whitelistedAddresses;
  


  constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI
  ) ERC721(_name, _symbol) {
    setBaseURI(_initBaseURI);
    mint(5);
  }

  // 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), "not white listed");
            uint256 ownerTokenCount = balanceOf(msg.sender);
            require(ownerTokenCount + _mintAmount <= maxPerAddress);
        }
          require(msg.value >= cost * _mintAmount);
    }
    
    for (uint256 i = 1; i <= _mintAmount; i++) {
      _safeMint(msg.sender, supply + i);
    }
  }

  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"
    );

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

  //only owner
  function setCost(uint256 _newCost) public onlyOwner {
    cost = _newCost;
  }

  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
    maxMintAmount = _newmaxMintAmount;
  }

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

  function isWhiteListed(address _user) public view returns (bool) {
      for(uint256 i = 0; i < whitelistedAddresses.length; i++) {
          if (whitelistedAddresses[i] == _user) {
              return true;
          }
      }
      return false;
  }

 function presale(bool _state) public onlyOwner {
    onlyWhiteListed = _state;
  }

  function withdraw() public payable onlyOwner {
    require(payable(msg.sender).send(address(this).balance));
  }
}
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), "not white listed");
            uint256 ownerTokenCount = balanceOf(msg.sender);
            require(ownerTokenCount + _mintAmount <= maxPerAddress);
        }
          require(msg.value >= cost * _mintAmount);
    }
    
    for (uint256 i = 1; i <= _mintAmount; i++) {
      _safeMint(msg.sender, supply + i);
    }
  }
// public