/*
  _      _       _          _                        _   _ ______ _______   ______    _ _   ____        _ _ 
 | |    (_)     | |        | |                      | \ | |  ____|__   __| |  ____|  | | | |  _ \      | | |
 | |     _ _ __ | | _____  | |    _   _ _ __ __  __ |  \| | |__     | |    | |__ __ _| | | | |_) | __ _| | |
 | |    | | '_ \| |/ / __| | |   | | | | '_ \\ \/ / | . ` |  __|    | |    |  __/ _` | | | |  _ < / _` | | |
 | |____| | | | |   <\__ \ | |___| |_| | | | |>  <  | |\  | |       | |    | | | (_| | | | | |_) | (_| | | |
 |______|_|_| |_|_|\_|___/ |______\__, |_| |_/_/\_\ |_| \_|_|       |_|    |_|  \__,_|_|_| |____/ \__,_|_|_|
                                   __/ |                                                                    
                                  |___/                                                                                                    
*/

pragma solidity >=0.7.0 <0.9.0;





contract LynxLinksFallBall is ERC721, Ownable {
  using Strings for uint256;
  using Counters for Counters.Counter;

  Counters.Counter private supply;

  string public uriPrefix = "";
  string public uriSuffix = ".json";
  string public hiddenMetadataUri;
  
  uint256 public cost = 0.025 ether;
  uint256 public maxSupply = 500;
  uint256 public maxMintAmountPerTx = 100;
  uint256 public nftPerAddressLimit = 100;
  
  bytes32 public merkleRoot;

  bool public paused = true;
  bool public revealed = false;
  bool public publicMint = false;

  mapping(address => uint256) public addressMintedBalance;

  constructor() ERC721("Links Lynx Fall Ball", "LLFB") {
    setHiddenMetadataUri("");
  }

  modifier mintCompliance(uint256 _mintAmount) {
    require(_mintAmount > 0 && _mintAmount <= maxMintAmountPerTx, "Invalid mint amount!");
    require(supply.current() + _mintAmount <= maxSupply, "Max supply exceeded!");

    _;
  }

  function totalSupply() public view returns (uint256) {
    return supply.current();
  }

  function WhitelistMint(bytes32[] calldata _merkleProof, uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
    require(!paused, "Contract is paused!");
    require(publicMint == false);
    require(msg.value >= cost * _mintAmount, "Insufficient funds!");
    bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
    require(MerkleProof.verify(_merkleProof, merkleRoot, leaf), "Invalid proof.");
    uint256 ownerMintedAmount = addressMintedBalance[msg.sender];
    require(ownerMintedAmount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");

    _mintLoop(msg.sender, _mintAmount);
    addressMintedBalance[msg.sender] += _mintAmount;
  }

  function Mint(uint256 _mintAmount) public payable mintCompliance(_mintAmount) {
    require(publicMint == true, "Public mint is not open");
    require(!paused, "Contract is paused!");
    require(msg.value >= cost * _mintAmount, "Insufficient funds!");
    uint256 ownerMintedAmount = addressMintedBalance[msg.sender];
    require(ownerMintedAmount + _mintAmount <= nftPerAddressLimit, "max NFT per address exceeded");

    _mintLoop(msg.sender, _mintAmount);
    addressMintedBalance[msg.sender] += _mintAmount;
  }
  
  function mintForAddress(uint256 _mintAmount, address _receiver) public mintCompliance(_mintAmount) onlyOwner {
    _mintLoop(_receiver, _mintAmount);
  }

  function walletOfOwner(address _owner) public view returns (uint256[] memory) {
    uint256 ownerTokenCount = balanceOf(_owner);
    uint256[] memory ownedTokenIds = new uint256[](ownerTokenCount);
    uint256 currentTokenId = 1;
    uint256 ownedTokenIndex = 0;

    while (ownedTokenIndex < ownerTokenCount && currentTokenId <= maxSupply) {
      address currentTokenOwner = ownerOf(currentTokenId);

      if (currentTokenOwner == _owner) {
        ownedTokenIds[ownedTokenIndex] = currentTokenId;

        ownedTokenIndex++;
      }

      currentTokenId++;
    }

    return ownedTokenIds;
  }

  function tokenURI(uint256 _tokenId) public view virtual override returns (string memory) {
    require(
      _exists(_tokenId),
      "ERC721Metadata: URI query for nonexistent token"
    );

    if (revealed == false) {
      return hiddenMetadataUri;
    }

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

  function setRevealed(bool _state) public onlyOwner {
    revealed = _state;
  }

  function setCost(uint256 _cost) public onlyOwner {
    cost = _cost;
  }

  function setMaxMintAmountPerTx(uint256 _maxMintAmountPerTx) public onlyOwner {
    maxMintAmountPerTx = _maxMintAmountPerTx;
  }

  function setHiddenMetadataUri(string memory _hiddenMetadataUri) public onlyOwner {
    hiddenMetadataUri = _hiddenMetadataUri;
  }

  function setUriPrefix(string memory _uriPrefix) public onlyOwner {
    uriPrefix = _uriPrefix;
  }

  function setUriSuffix(string memory _uriSuffix) public onlyOwner {
    uriSuffix = _uriSuffix;
  }

  function setPaused(bool _state) public onlyOwner {
    paused = _state;
  }
 
  function setPublicMint(bool _state) public onlyOwner {
    publicMint = _state;
  }

  function setmerkleRoot(bytes32 _merkleRoot) public onlyOwner {
    merkleRoot = _merkleRoot;
  }

  function setMaxSupply(uint256 _newSupply) public onlyOwner {
    maxSupply = _newSupply;
  }
  
  function setNftPerAddressLimit(uint256 _limit) public onlyOwner {
    nftPerAddressLimit = _limit;
  }

  function withdraw() public onlyOwner {
  
    (bool os, ) = payable(owner()).call{value: address(this).balance}("");
    require(os);
  }

  function _mintLoop(address _receiver, uint256 _mintAmount) internal {
    for (uint256 i = 0; i < _mintAmount; i++) {
      supply.increment();
      _safeMint(_receiver, supply.current());
    }
  }

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