// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

// Author:
// Francesco Sullo <francesco@sullo.co>

import "./IERC6982.sol";

// ERC165 interface id is 0x452faa60
interface IERC721Lockable is IERC6982 {
  event LockerSet(address locker);
  event LockerRemoved(address locker);
  event ForcefullyUnlocked(uint256 tokenId);

  // tells if a token is locked. Removed to extend IERC6982
  // function locked(uint256 tokenID) external view returns (bool);

  // tells the address of the contract which is locking a token
  function lockerOf(uint256 tokenID) external view returns (address);

  // tells if a contract is a locker
  function isLocker(address _locker) external view returns (bool);

  // set a locker, if the actor that is locking it is a contract, it
  // should be approved
  // It should emit a LockerSet event
  function setLocker(address pool) external;

  // remove a locker
  // It should emit a LockerRemoved event
  function removeLocker(address pool) external;

  // tells if an NFT has any locks on it
  // The function is called internally and externally
  function hasLocks(address owner) external view returns (bool);

  // locks an NFT
  // It should emit a Locked event
  function lock(uint256 tokenID) external;

  // unlocks an NFT
  // It should emit a Unlocked event
  function unlock(uint256 tokenID) external;

  // unlock an NFT if the locker is removed
  // This is an emergency function called by the token owner or a DAO
  // It should emit a ForcefullyUnlocked event
  function unlockIfRemovedLocker(uint256 tokenID) external;
}