// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./Upgradeable.sol";

/// @title Upgradable Registry Contract
contract BreedingProxy is Upgradeable {
    /// @notice Contract constructor
    /// @dev Calls Upgradable contract constructor and sets contract name
    constructor() {}
    
    receive() external payable {}
    
    /// @notice Performs a delegatecall to the implementation contract.
    /// @dev Fallback function allows to perform a delegatecall to the given implementation.
    /// This function will return whatever the implementation call returns.
    fallback() external payable {
        require(msg.data.length > 0, "Calldata must not be empty");
        address _impl = getImplementation();
        assembly {
            // The pointer to the free memory slot
            let ptr := mload(0x40)
            // Copy function signature and arguments from calldata at zero position into memory at pointer position
            calldatacopy(ptr, 0x0, calldatasize())
            // Delegatecall method of the implementation contract, returns 0 on error
            let result := delegatecall(gas(), _impl, ptr, calldatasize(), 0x0, 0)
            // Get the size of the last return data
            let size := returndatasize()
            // Copy the size length of bytes from return data at zero position to pointer position
            returndatacopy(ptr, 0x0, size)
            // Depending on result value
            switch result
                case 0 {
                    // End execution and revert state changes
                    revert(ptr, size)
                }
                default {
                    // Return data with length of size at pointers position
                    return(ptr, size)
                }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

/// @title Upgradeable contract
contract Upgradeable is Ownable {
    /// @notice Storage position of the current implementation address.
    /// @dev The address of the current implementation is stored in a
    /// constant pseudorandom slot of the contract proxy contract storage
    /// (slot number obtained as a result of hashing a certain message),
    /// the probability of rewriting which is almost zero
    bytes32 private constant implementationPosition = keccak256(
        "implementation"
    );

    /// @notice Contract constructor
    /// @dev Calls Ownable contract constructor
    constructor() {}

    /// @notice Returns the current implementation contract address
    function getImplementation() public view returns (address implementation) {
        bytes32 position = implementationPosition;
        assembly {
            implementation := sload(position)
        }
    }

    /// @notice Sets new implementation contract address as current
    /// @param _newImplementation New implementation contract address
    function setImplementation(address _newImplementation) public onlyOwner {
        require(_newImplementation != address(0), "New implementation must have non-zero address");
        address currentImplementation = getImplementation();
        require(currentImplementation != _newImplementation, "New implementation must have new address");
        bytes32 position = implementationPosition;
        assembly {
            sstore(position, _newImplementation)
        }
    }

    /// @notice Sets new implementation contract address and call its initializer.
    /// @dev New implementation call is a low level delegatecall.
    /// @param _newImplementation the new implementation address.
    /// @param _newImplementaionCallData represents the msg.data to bet sent through the low level delegatecall.
    /// This parameter may include the initializer function signature with the needed payload.
    function setImplementationAndCall(
        address _newImplementation,
        bytes calldata _newImplementaionCallData
    ) external payable {
        setImplementation(_newImplementation);
        if (_newImplementaionCallData.length > 0) {
            (bool success, ) = address(this).call{value: msg.value}(
                _newImplementaionCallData
            );
            require(success, "Delegatecall has failed");
        }
    }
}

// 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);
    }
}

// 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;
    }
}