// File: contracts/background/TerraformLogoElement.sol



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

import '@openzeppelin/contracts/access/Ownable.sol';

interface ITerraforms {
    function tokenSVG(uint tokenid) external view returns (string memory);
    function ownerOf(uint256 tokenId) external view returns (address);
    function balanceOf(address owner) external view returns (uint256);
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
}

contract TerraformLogoElement is Ownable {
  ITerraforms terraforms = ITerraforms(0x4E1f41613c9084FdB9E34E11fAE9412427480e56);
  address public sourceContract = address(0x4E1f41613c9084FdB9E34E11fAE9412427480e56);

  string public siteUrl = 'https://mathcastles.xyz/';
  string public collectionUrl = 'https://opensea.io/collection/terraforms';
  string public twitterUrl;
  string public discordUrl = 'https://discord.gg/QBJ5zRSt';

  constructor() Ownable() {}

  /// @notice Sets the website for the collection
  function setSiteUrl(string memory url) external onlyOwner {
    siteUrl = url;
  }

  /// @notice Sets the collection url such as OpenSea
  function setCollectionUrl(string memory url) external onlyOwner {
    collectionUrl = url;
  }

  /// @notice Sets the discord url
  function setTwitterUrl(string memory url) external onlyOwner {
    twitterUrl = url;
  }

  /// @notice Sets the discord url
  function setDiscordUrl(string memory url) external onlyOwner {
    collectionUrl = url;
  }

  /// @notice Specifies whether or not non-owners can use a token for their logo layer
  /// @dev Required for any element used for a logo layer
  function mustBeOwnerForLogo() external view returns (bool) {
    return true;
  }

  /// @notice Returns the owner of a terraform token
  /// @dev To set a terraform token as a logo layer, sender must own terraform
  function ownerOf(uint256 tokenId) external view returns (address) {
    return terraforms.ownerOf(tokenId);
  }

  function balanceOf(address owner) public view returns (uint256) {
    return terraforms.balanceOf(owner);
  }

  function tokenOfOwnerByIndex(address owner, uint256 index) public view returns (uint256) {
    return terraforms.tokenOfOwnerByIndex(owner, index);
  }

  /// @notice Gets the SVG for the logo layer
  /// @dev Required for any element used for a logo layer
  /// @param tokenId, the tokenId that SVG will be fetched for
  function getSvg(uint256 tokenId) public view returns (string memory) {
    return terraforms.tokenSVG(tokenId);
  }
}
// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}