// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

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;
    }
}

// File: contracts/VegensBurn.sol



// SPDX-License-Identifier: UNLICENSED
// author @emiliolanzalaco
pragma solidity ^0.8.9;

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

interface IERC721 {
    function transferFrom(address from, address to, uint256 id) external;
}

error MustBurnTenVegens();
error AllUniquesMinted();

contract VegensBurn is Ownable {

    IERC721 public Vegens;
    uint256 public uniqueId = 1500;
    uint64 public burnQuantity = 10;
    uint64 public uniquesLeft = 35;
    uint128 public vegensBurnt;
    
    event Burn (
        address burner, 
        uint256[] burnedTokenIds,
        uint256 uniqueId
    );

    constructor (address _vegens) {
        Vegens = IERC721(_vegens);
    }

    function burn(uint256[] calldata ids) external {
        if (ids.length != burnQuantity) revert MustBurnTenVegens();
        if (uniquesLeft < 1) revert AllUniquesMinted();
        uniquesLeft--;
        vegensBurnt += burnQuantity;

        for (uint256 i; i < ids.length; i++) {
            Vegens.transferFrom(msg.sender, 0x000000000000000000000000000000000000dEaD, ids[i]);
        }

        Vegens.transferFrom(address(this), msg.sender, uniqueId);
        uniqueId++;

        emit Burn(msg.sender, ids, uniqueId);
    }

    function setBurnQuantity (uint64 _burnQuantity) external onlyOwner {
        burnQuantity = _burnQuantity;
    }

    function setUniquesLeft (uint64 _uniquesLeft) external onlyOwner {
        uniquesLeft = _uniquesLeft;
    }

    // get new total supply of Vegens, deducting burnt tokens
    function totalSupply () external view returns (uint256) {
        return uniqueId - vegensBurnt;
    }

    function onERC721Received(address, address, uint256, bytes calldata) external pure returns (bytes4) {
        return this.onERC721Received.selector;
    }

}