// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;


import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MetaDataNFT is ERC721URIStorage {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;
    mapping (address => uint256) public mintTracker;

    constructor() ERC721("MetaDataNFTV2", "MDNFT2") {}

    function mint(string memory tokenURI) public returns (uint256){
        if(mintTracker[msg.sender] > 0){
            require(block.timestamp >= mintTracker[msg.sender], "Please wait 24 hours before minting again");
        }
        uint256 slowdown = block.timestamp + 1 days;
        _tokenIds.increment();

        uint256 newItemId = _tokenIds.current();
        _safeMint(msg.sender, newItemId);
        _setTokenURI(newItemId, tokenURI);
        mintTracker[msg.sender] = slowdown;

        return newItemId;
    }
}