contract GameChaingers is Initializable, ERC721Upgradeable, ERC721URIStorageUpgradeable, PausableUpgradeable, AccessControlUpgradeable, ERC721BurnableUpgradeable, UUPSUpgradeable {
    using CountersUpgradeable for CountersUpgradeable.Counter;

    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
    CountersUpgradeable.Counter private _tokenIdCounter;
    bytes32 public constant UPGRADER_ROLE = keccak256("UPGRADER_ROLE");

    function initialize() initializer public {
        __ERC721_init("GameChaingers", "GC");
        __ERC721URIStorage_init();
        __Pausable_init();
        __AccessControl_init();
        __ERC721Burnable_init();
        __UUPSUpgradeable_init();

        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setupRole(PAUSER_ROLE, msg.sender);
        _setupRole(MINTER_ROLE, msg.sender);
        _setupRole(UPGRADER_ROLE, msg.sender);
    }

    function _baseURI() internal pure override returns (string memory) {
        return "https://token.gamechaingers.io";
    }

    function pause() public onlyRole(PAUSER_ROLE) {
        _pause();
    }

    function unpause() public onlyRole(PAUSER_ROLE) {
        _unpause();
    }

    function safeMint(address to) public onlyRole(MINTER_ROLE) {
        _safeMint(to, _tokenIdCounter.current());
        _tokenIdCounter.increment();
    }

    function _beforeTokenTransfer(address from, address to, uint256 tokenId)
        internal
        whenNotPaused
        override
    {
        super._beforeTokenTransfer(from, to, tokenId);
    }

    function _authorizeUpgrade(address newImplementation)
        internal
        onlyRole(UPGRADER_ROLE)
        override
    {}

    // The following functions are overrides required by Solidity.

    function _burn(uint256 tokenId)
        internal
        override(ERC721Upgradeable, ERC721URIStorageUpgradeable)
    {
        super._burn(tokenId);
    }

    function tokenURI(uint256 tokenId)
        public
        view
        override(ERC721Upgradeable, ERC721URIStorageUpgradeable)
        returns (string memory)
    {
        return super.tokenURI(tokenId);
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        override(ERC721Upgradeable, AccessControlUpgradeable)
        returns (bool)
    {
        return super.supportsInterface(interfaceId);
    }
}
function _burn(uint256 tokenId)
    internal
    override(ERC721Upgradeable, ERC721URIStorageUpgradeable)
{
    super._burn(tokenId);
}

// The following functions are overrides required by Solidity.