// File: contracts/BuildColors.sol



//SPDX-License-Identifier: CC-BY-SA-4.0

import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract BuildColors is Ownable {
    using Strings for uint256;

    constructor() Ownable() {}

    function buildColorString(
        uint32 colorR,
        uint32 colorG,
        uint32 colorB
    ) pure internal returns (string memory) {
        return string(abi.encodePacked(
                'rgb(',
                Strings.toString(colorR),
                ',',
                Strings.toString(colorG),
                ',',
                Strings.toString(colorB),
                ')'
            ));
    }

    function buildSCColorString(
        uint32 colorR,
        uint32 colorG,
        uint32 colorB
    ) pure internal returns (string memory) {
        // TOO DARK, lighter
        if (
            colorR >= 127 &&
            colorG >= 127 &&
            colorB >= 127
        ) {
            colorR = colorR / 3;
            colorG = colorG / 3;
            colorB = colorB / 3;
        }

        // TOO light, darker
        if (
            colorR < 127 &&
            colorG < 127 &&
            colorB < 127
        ) {
            colorR = (255 - colorR) / 3;
            colorG = (255 - colorG) / 3;
            colorB = (255 - colorB) / 3;
        }

        return string(abi.encodePacked(
                'rgb(',
                Strings.toString(colorR),
                ',',
                Strings.toString(colorG),
                ',',
                Strings.toString(colorB),
                ')'
            ));
    }

    function buildXTextPosition(
        uint32 positionX,
        uint32 positionY
    ) pure internal returns (string memory) {
        return positionX > 65 && positionY > 70 ? Strings.toString(96) : Strings.toString(96);
    }

    function buildYTextPosition(
        uint32 positionX,
        uint32 positionY
    ) pure internal returns (string memory) {
        return positionX > 65 && positionY > 70 ? Strings.toString(8) : Strings.toString(94);
    }

    function buildSVG(
        uint32 colorR,
        uint32 colorG,
        uint32 colorB,
        uint32 positionX,
        uint32 positionY
    ) external onlyOwner returns (string memory) {

        return string(abi.encodePacked(
                '<svg xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" preserveAspectRatio="xMinYMin meet" viewBox="0 0 100 100"><rect x="0" y="0" width="100" height="100" fill="',
                buildColorString(
                    colorR,
                    colorG,
                    colorB
                ),
                '"/><rect x="',
                Strings.toString(positionX),
                '" y="',
                Strings.toString(positionY),
                '" width="1" height="1" fill="',
                buildSCColorString(
                    colorG,
                    colorB,
                    colorR
                ),
                '"/><text id="coordsText" text-anchor="end" dominant-baseline="middle" transform="matrix(0.5 0 0 0.5 ',
                buildXTextPosition(positionX, positionY),
                ' ',
                buildYTextPosition(positionX, positionY),
                ')" fill="',
                buildSCColorString(
                    colorG,
                    colorB,
                    colorR
                ),
                '">',
                Strings.toString(positionX),
                ':',
                Strings.toString(positionY),
                '</text></svg>'
            ));
    }

}

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



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// 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;
    }
}