contract ZakMiniMonster is ERC721Enumerable, Ownable {
    using Strings for uint256;
    string private baseURI;
    string public baseExtension = ".json";
    string public notRevealedUri;
    uint256 public preSaleCost = 0.222 ether;
    uint256 public cost = 0.222 ether;
    uint256 public maxSupply = 111;
    uint256 public preSaleMaxSupply = 111;
    uint256 public maxMintAmountPresale = 111;
    uint256 public maxMintAmount = 111;
    uint256 public nftPerAddressLimitPresale = 111;
    uint256 public nftPerAddressLimit = 111;
    uint256 public preSaleDate = 1647554200;
    uint256 public preSaleEndDate = 1647554300;
    uint256 public publicSaleDate = 1647554400;
    bool public paused = false;
    bool public revealed = false;
    mapping(address => bool) whitelistedAddresses;
    mapping(address => uint256) public addressMintedBalance;

    constructor(string memory _name, string memory _symbol, string memory _initNotRevealedUri) ERC721(_name, _symbol) {
        setNotRevealedURI(_initNotRevealedUri);
    }
    
    //MODIFIERS
    modifier notPaused {
         require(!paused, "the contract is paused");
         _;
    }

    modifier saleStarted {
        require(block.timestamp >= preSaleDate, "Sale has not started yet");
        _;
    }

    modifier minimumMintAmount(uint256 _mintAmount) {
        require(_mintAmount > 0, "need to mint at least 1 NFT");
        _;
    }

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

    function presaleValidations(uint256 _ownerMintedCount, uint256 _mintAmount, uint256 _supply) internal {
            uint256 actualCost;
            block.timestamp < preSaleEndDate ? actualCost = preSaleCost : actualCost = cost;
            require(isWhitelisted(msg.sender), "user is not whitelisted");
            require(_ownerMintedCount + _mintAmount <= nftPerAddressLimitPresale, "max NFT per address exceeded for presale");
            require(msg.value >= actualCost * _mintAmount, "insufficient funds");
            require(_mintAmount <= maxMintAmountPresale,"max mint amount per transaction exceeded");
            require(_supply + _mintAmount <= preSaleMaxSupply,"max NFT presale limit exceeded");
    }

    function publicsaleValidations(uint256 _ownerMintedCount, uint256 _mintAmount) internal {
        require(_ownerMintedCount + _mintAmount <= nftPerAddressLimit,"max NFT per address exceeded");
        require(msg.value >= cost * _mintAmount, "insufficient funds");
        require(_mintAmount <= maxMintAmount,"max mint amount per transaction exceeded");
    }

    //MINT
    function mint(uint256 _mintAmount) public payable notPaused saleStarted minimumMintAmount(_mintAmount) {
        uint256 supply = totalSupply();
        uint256 ownerMintedCount = addressMintedBalance[msg.sender];

        //Do some validations depending on which step of the sale we are in
        block.timestamp < publicSaleDate ? presaleValidations(ownerMintedCount, _mintAmount, supply) : publicsaleValidations(ownerMintedCount, _mintAmount);

        require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");

        for (uint256 i = 1; i <= _mintAmount; i++) {
            addressMintedBalance[msg.sender]++;
            _safeMint(msg.sender, supply + i);
        }
    }
    
    function gift(uint256 _mintAmount, address destination) public onlyOwner {
        require(_mintAmount > 0, "need to mint at least 1 NFT");
        uint256 supply = totalSupply();
        require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");

        for (uint256 i = 1; i <= _mintAmount; i++) {
            addressMintedBalance[destination]++;
            _safeMint(destination, supply + i);
        }
    }

    //PUBLIC VIEWS
    function isWhitelisted(address _user) public view returns (bool) {
        return whitelistedAddresses[_user];
    }

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

    function getCurrentCost() public view returns (uint256) {
        if (block.timestamp < preSaleEndDate) {
            return preSaleCost;
        } else {
            return cost;
        }
    }

    //ONLY OWNER VIEWS
    function getBaseURI() public view onlyOwner returns (string memory) {
        return baseURI;
    }

    function getContractBalance() public view onlyOwner returns (uint256) {
        return address(this).balance;
    }

    //ONLY OWNER SETTERS
    function reveal() public onlyOwner {
        revealed = true;
    }

    function pause(bool _state) public onlyOwner {
        paused = _state;
    }
    
    function setNftPerAddressLimitPreSale(uint256 _limit) public onlyOwner {
        nftPerAddressLimitPresale = _limit;
    }

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

    function setPresaleCost(uint256 _newCost) public onlyOwner {
        preSaleCost = _newCost;
    }

    function setCost(uint256 _newCost) public onlyOwner {
        cost = _newCost;
    }
    
    function setmaxMintAmountPreSale(uint256 _newmaxMintAmount) public onlyOwner {
        maxMintAmountPresale = _newmaxMintAmount;
    }

    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 setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
        notRevealedUri = _notRevealedURI;
    }

    function setPresaleMaxSupply(uint256 _newPresaleMaxSupply) public onlyOwner {
        preSaleMaxSupply = _newPresaleMaxSupply;
    }

    function setMaxSupply(uint256 _maxSupply) public onlyOwner {
        maxSupply = _maxSupply;
    }

    function setPreSaleDate(uint256 _preSaleDate) public onlyOwner {
        preSaleDate = _preSaleDate;
    }

    function setPreSaleEndDate(uint256 _preSaleEndDate) public onlyOwner {
        preSaleEndDate = _preSaleEndDate;
    }

    function setPublicSaleDate(uint256 _publicSaleDate) public onlyOwner {
        publicSaleDate = _publicSaleDate;
    }

    function whitelistUsers(address[] memory addresses) public onlyOwner {
        for (uint256 i = 0; i < addresses.length; i++) {
            whitelistedAddresses[addresses[i]] = true;
        }
    }

    function withdraw() public payable onlyOwner {
        (bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
        require(success);
    }
}
function mint(uint256 _mintAmount) public payable notPaused saleStarted minimumMintAmount(_mintAmount) {
    uint256 supply = totalSupply();
    uint256 ownerMintedCount = addressMintedBalance[msg.sender];

    //Do some validations depending on which step of the sale we are in
    block.timestamp < publicSaleDate ? presaleValidations(ownerMintedCount, _mintAmount, supply) : publicsaleValidations(ownerMintedCount, _mintAmount);

    require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");

    for (uint256 i = 1; i <= _mintAmount; i++) {
        addressMintedBalance[msg.sender]++;
        _safeMint(msg.sender, supply + i);
    }
}

//MINT