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

    string public baseURI;
    string public baseExtension = ".json";
    string public notRevealedUri;
    uint256 public cost = 0.025 ether; // 0.025 ETH on whitelist, will be changed to 0.04 ETH on reveal
    uint256 public maxSupply = 8888;
    uint256 public maxMintAmount = 30;
    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);
    }

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

    // PUBLIC

    // mint
    function mint(uint256 _mintAmount) public payable {
        require(!paused, "contract is paused");
        uint256 supply = totalSupply();
        require(_mintAmount > 0, "need to mint atleast 1 NFT");
        require(
            _mintAmount <= maxMintAmount,
            "max mint amount per session exceeded"
        );
        require(supply + _mintAmount <= maxSupply, "max NFT limit exceeded");

        if (msg.sender != owner()) {
            if (onlyWhitelisted == true) {
                require(isWhitelisted(msg.sender), "wallet is not whitelisted");
            }
            require(msg.value >= cost * _mintAmount, "insufficient funds");
        }

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

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

    // URI for tokens
    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
                    )
                )
                : "";
    }

    // OWNER ONLY

    // reveal the ArabianPenguins!
    function revealNft() public onlyOwner {
        revealed = true;
    }

    // disable whitelist
    function disableWhitelistOnly() public onlyOwner {
        onlyWhitelisted = false;
        cost = 0.04 ether;
    }

    // change cost per token
    function setCost(uint256 _newCost) public onlyOwner {
        cost = _newCost;
    }

    // change maximum mint per transaction.
    function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner {
        maxMintAmount = _newmaxMintAmount;
    }

    // change base uri
    function setBaseURI(string memory _newBaseURI) public onlyOwner {
        baseURI = _newBaseURI;
    }

    // change uri for hidden image
    function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
        notRevealedUri = _notRevealedURI;
    }

    // change base extension (.json)
    function setBaseExtension(string memory _newBaseExtension)
        public
        onlyOwner
    {
        baseExtension = _newBaseExtension;
    }

    // check state of minting
    function pause(bool _state) public onlyOwner {
        paused = _state;
    }

    //set only whitelisted
    function setOnlyWhitelisted(bool _state) public onlyOwner {
        onlyWhitelisted = _state;
    }

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

    // withdraw funds
    function withdraw() public payable onlyOwner {
        (bool success, ) = payable(msg.sender).call{
            value: address(this).balance
        }("");
        require(success);
    }
}
function revealNft() public onlyOwner {
    revealed = true;
}

// OWNER ONLY
// reveal the ArabianPenguins!