// SPDX-License-Identifier: MIT


// File: @openzeppelin/contracts/utils/Context.sol


// 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: @openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @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: contracts/nft721_burner.sol


// Copyright (c) 2023 Keisuke OHNO

/*

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

*/

pragma solidity >=0.8.17 <0.9.0;


interface iNFTCollection {
    function externalMint(address _address , uint256 _amount) external payable ;
    function externalBurn(uint256[] memory _burnTokenIds) external;
    function balanceOf(address address_) external view returns (uint256);
    function ownerOf(uint256 tokenId_) external view returns (address);
}

contract NFTBurner is Ownable {

    iNFTCollection public NFTCollection = iNFTCollection(0x2db269218ed5C7130DCBC1701611A023c650Da8a); 

    constructor(){

    }


    modifier callerIsUser() {
        require(tx.origin == msg.sender, "The caller is another contract.");
        _;
    }

    bool public paused = false;

    function setPause(bool _state) public onlyOwner() {
        paused = _state;
    }

    function burn(uint256[] memory _burnTokenIds) public callerIsUser{
        require(!paused, "the contract is paused");
        NFTCollection.externalBurn( _burnTokenIds );
    }

    //onlyowner
    function setNFTCollection(address _address) public onlyOwner() {
        NFTCollection = iNFTCollection(_address);
    }

    function tokensOfOwner(address _address) public view returns (uint256[] memory) {
        unchecked {
            uint256 tokenIdsIdx;
            uint256 tokenIdsLength = NFTCollection.balanceOf(_address);
            uint256[] memory tokenIds = new uint256[](tokenIdsLength);
            for (uint256 i = 0; tokenIdsIdx != tokenIdsLength; ++i) {
                try NFTCollection.ownerOf(i) {
                    if (NFTCollection.ownerOf(i) == _address) {
                        tokenIds[tokenIdsIdx++] = i;
                    }
                } catch {
                    // nothing
                }
            }
            return tokenIds;   
        }
    }

    function balanceOf(address _address ) public view returns (uint256){
        return NFTCollection.balanceOf( _address );
    }

    function ownerOf(uint256 _tokenId ) public view returns (address){
        return NFTCollection.ownerOf( _tokenId );
    }



}