// SPDX-License-Identifier: MIT
pragma solidity 0.8.10;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/governance/TimelockController.sol";
import "../core/HasSignature.sol";

contract BEBoxMall is Ownable, HasSignature, TimelockController {
  using SafeERC20 for IERC20;
  using Address for address;

  uint256 public constant MIN_DELAY = 2 days;
  uint256 public constant MAX_DELAY = 16 days;
  uint256 private _minDelay;

  bool public address_initialized;

  constructor(address[] memory proposers, address[] memory executors)
    TimelockController(MIN_DELAY, proposers, executors)
    HasSignature("BEBoxMall", "1")
  {
    _minDelay = MIN_DELAY;
    address_initialized = false;
  }

  event BEBoxPaid(
    uint256 indexed boxId,
    address indexed buyer,
    uint256 boxType,
    uint256 price,
    address paymentToken
  );

  address public paymentReceivedAddress;

  function setPaymentReceivedAddress(address _paymentReceivedAddress) public {
    require(
      _paymentReceivedAddress != address(0),
      "BEBoxMall::setPaymentReceivedAddress: payment received address can not be zero"
    );
    if (address_initialized) {
      require(
        msg.sender == address(this),
        "BEBoxMall::setPaymentReceivedAddress: Call must come from BEBoxMall."
      );
    } else {
      require(
        msg.sender == owner(),
        "BEBoxMall::setPaymentReceivedAddress: First call must come from owner."
      );
      address_initialized = true;
    }
    paymentReceivedAddress = _paymentReceivedAddress;
  }

  /**
   * @dev BE box payment function
   */
  function payForBoxWithSignature(
    uint256 boxId,
    uint256 _type,
    address userAddress,
    uint256 price,
    address paymentErc20,
    uint256 saltNonce,
    bytes calldata signature
  ) external onlyOwner signatureValid(signature) {
    require(
      !userAddress.isContract(),
      "BEBoxPayment: Only user address is allowed to buy box"
    );
    require(_type > 0, "BEBoxPayment: Invalid box type");
    require(price > 0, "BEBoxPayment: Invalid payment amount");
    bytes32 criteriaMessageHash = getMessageHash(
      _type,
      paymentErc20,
      price,
      saltNonce
    );

    checkSigner712(userAddress, criteriaMessageHash, signature);

    IERC20 paymentToken = IERC20(paymentErc20);
    uint256 allowToPayAmount = paymentToken.allowance(
      userAddress,
      address(this)
    );
    require(allowToPayAmount >= price, "BEBoxPayment: Invalid token allowance");
    // Transfer payment
    paymentToken.safeTransferFrom(userAddress, paymentReceivedAddress, price);
    _useSignature(signature);
    // Emit payment event
    emit BEBoxPaid(boxId, userAddress, _type, price, paymentErc20);
  }

  function getMessageHash(
    uint256 _boxType,
    address _paymentErc20,
    uint256 _price,
    uint256 _saltNonce
  ) public pure returns (bytes32) {
    return
      keccak256(
        abi.encode(
          keccak256(
            "set(uint256 item,address token,uint256 price,uint256 salt)"
          ),
          _boxType,
          _paymentErc20,
          _price,
          _saltNonce
        )
      );
  }

  /**
   * @dev Returns the minimum delay for an operation to become valid.
   *
   * This value can be changed by executing an operation that calls `updateDelay`.
   */
  function getMinDelay()
    public
    view
    virtual
    override
    returns (uint256 duration)
  {
    return _minDelay;
  }

  /**
   * @dev Changes the minimum timelock duration for future operations.
   *
   * Emits a {MinDelayChange} event.
   *
   * Requirements:
   *
   * - the caller must be the timelock itself. This can only be achieved by scheduling and later executing
   * an operation where the timelock is the target and the data is the ABI-encoded call to this function.
   */
  function updateDelay(uint256 newDelay) external virtual override {
    require(msg.sender == address(this), "BEBoxMall: caller must be timelock");
    require(
      newDelay >= MIN_DELAY,
      "BEBoxMall: newDelay must greater than or equal to MIN_DELAY"
    );
    require(
      newDelay <= MAX_DELAY,
      "BEBoxMall: newDelay must less than or equal to MAX_DELAY"
    );
    emit MinDelayChange(_minDelay, newDelay);
    _minDelay = newDelay;
  }
}